Electrical box assembly for recessed mounting of high and low voltage components

[0001] This application is a Continuation-In-Part of U.S. patent application Ser. No. 11/713,381 filed Mar. 2, 2007 and still pending, the entire contents of which are incorporated herein by reference.

[0002] This invention relates to electrical box assemblies for mounting components for high and low voltage devices and specifically to a flat panel TV box assembly that can be easily installed on an interior wall of a building to provide a recessed housing for electrical services and cable TV connections to a television, computer, or home stereo system.

[0003] With the proliferation of high definition televisions and various auxiliary devices, such as digital videodisc players, game stations, and surround sound systems, there is a need to manage the connections between these devices to ensure there is adequate power and also to manage the myriad of cables and cords that accompany such systems. Additionally, many electrical boxes for both high and low voltage components mount the components flush with the wall, which makes the plugs or connectors that mate with the wall-mounted components susceptible to damage, such as when devices, such as vacuum cleaners or other household hazards brush against the plugs or connectors.

[0004] What is needed therefore is an electrical box assembly that provides connection points for both high and low voltage components, provides isolation of high voltage connections from low voltage connections, provides features for managing the plethora of cables and wiring associated with modern television systems, and recesses the end connector of cords or cables to protect the plug ends of cords or end connectors of cables from undesirable contact with household appliances or household occupants.

[0005] An electrical box assembly was disclosed by the inventor in U.S. patent application Ser. No. 11/713,381, filed Mar. 2, 2007, and commonly owned with the present invention. The electrical box assembly of U.S. Ser. No. 11/713,381 included a box member and a frame member that formed an electrical box assembly for recessing high and low voltage electrical components within the wall of a structure and providing a mounting area for organizing the various electrical leads that supply a home entertainment center, such as a TV or stereo system. The current invention provides an improved electrical box assembly that accommodates two high voltage components and recesses the high voltage components farther within the wall and also provides an extended flange for more secure mounting of the electrical box assembly to a wall.

[0006] The invention is an electrical box assembly that provides electrical service including line voltage and signal line hookups for a television or home entertainment center. The electrical box assembly recesses electrical components within the wall to make them unobtrusive and out of the way. The box assembly includes an integral electrical box for housing two line voltage connections and connection points for several low voltage openings. The low voltage connection points are capable of accepting standard jacks for broadband cable, direct TV, surround sound cabling, or phone systems. The electrical box assembly includes a box member, a frame member, and an extended flange on the frame member to enable secure mounting to a pair of studs. The electrical box assembly enables easy consolidation of all the various electrical and signal hookups for TV or home entertainment systems.

[0007] The electrical box assembly of the present invention includes several advantages over the prior art, including:

• • [0008] (1) Connection points are provided for mounting both high and low voltage components. An electrical box, integral with the box member of the assembly, is provided for housing and isolating a plurality of high voltage components, such as a duplex receptacle to provide line voltage to a TV or other electrical device. Connection points are also provided for mounting several low voltage components, such as a coupling plate for a coaxial cable.
  • [0009] (2) The electrical box assembly includes a backward projecting box portion that mounts within a wall, thereby recessing electrical devices within the wall to render them unobtrusive and out of the way. By recessing the electrical devices, the plug ends of cords or end connectors of cables are advantageously protected from undesirable contact with household appliances, household occupants, or other hazards.
  • [0010] (3) The electrical box assembly provides features for managing the plethora of cables and wiring associated with modern television systems, including integral loops for bundling and tying-off wires and cables, thereby providing a clean installation that is unobtrusive and minimizes excessive wires and cables running between the wall and the television, speaker system, or other components of a home entertainment system. The loops are positioned against the back wall of the box member, thereby positioning the wires and cables along the back wall of the assembly and advantageously recessing them behind the wall surface and away from household hazards.
  • [0011] (4) Mounting apertures are provided to coincide with the standard stud spacing to meet local construction codes. As a result, the electrical box assembly can be securely mounted between and supported by two adjacent studs.

[0012] These and other objects and advantages of the present invention will be better understood by reading the following description along with reference to the drawings.

[0041] The following is a listing of part numbers used in the drawings along with a brief description:

[0042]

	Part Number	Description
	20	electrical box assembly
	22	box member
	24	frame member
	26	electrical box
	28	open area
	30	connection point
	30A	vertically oriented connection point
	30B	horizontally oriented connection point
	32	peripheral wall of box member
	34	back wall of box member
	36	sidewalls of electrical box
	38	side of open area
	40	sidewall portion of peripheral wall
	42	aperture in sidewall of box member
	44	inner edge of peripheral wall
	46	juncture of peripheral wall and back wall
	48	outer edge of peripheral wall
	50	bottom wall
	52	loop member
	54	boss of electrical box
	56	threaded bore
	58	rear wall of electrical box
	60	high voltage enclosure
	62	boss on peripheral wall of box member
	63	flared portion on sidewalls of peripheral wall
	64	peripheral flange of frame member
	66	transverse flange of frame member
	68	guide member
	69	inner edge of transverse flange
	70	aperture in transverse flange
	72	attachment arrangement
	74	fastener for securing frame to box member
	76	aperture for low voltage component
	78	hole
	80	sheet rock
	82	wall
	84	stud
	86	mounting arrangement
	87	fastener
	88	mounting fastener
	89	apertures in transverse flange
	90	duplex receptacle
	92	fastener
	94	cover plate
	96	CATV connector plate
	98	fastener
	99	outer edge of electrical box assembly
	100	plug end
	102	electrical cord
	104	horizontally oriented CATV connector
	106	vertically oriented CATV connector
	108	telephone jack
	110	depressed area
	112	removable wall portion or knockout
	114	push-in electrical connector
	200	electrical box assembly
	202	box member
	204	frame member
	206	peripheral sidewall
	208	front edge
	209	first portion of box member
	210	second portion of box member
	212	back wall
	214	electrical box
	216	side of electrical box
	218	rear wall of electrical box
	220	connection point for high voltage component
	222	first sidewall portion
	224	second sidewall portion
	226	rear edge of second sidewall portion
	228	short wall
	230	edge of first sidewall portion
	232	stiffening rib
	234	exterior rib
	236	outer surface of box member
	238	tab
	240	first end of tab
	242	second end of tab
	244	integral boss
	246	bore
	248	low voltage opening in back wall
	250	connection point for low voltage component
	252	boss at low voltage opening
	254	groove
	256	divider Wall
	258	knockout
	260	top wall portion
	262	bottom wall portion
	264	loop member
	266	opening in loop member
	268	transverse flange
	270	peripheral flange
	272	top portion of transverse flange
	274	bottom portion of transverse flange
	276	side portion of transverse flange
	278	mounting aperture
	280	mounting arrangement
	282	hole in wall
	284	wall
	286	mounting fastener
	288	stud
	290	second set of mounting apertures
	292	duplex receptacle high voltage component
	294	low voltage component
	296	attachment arrangement
	298	boss of attachment arrangement
	300	aperture of attachment arrangement
	302	fastener of attachment arrangement
	304	aperture in wall
	306	sheetrock
	308	face of stud
	310	fastener
	312	aperture in peripheral wall
	314	electrical box assembly, one-piece embodiment
	316	plug end of electrical cord
	318	electrical cord
	D1	depth of peripheral wall
	D2	length of tab
	D3	stud center to center spacing
	D4	depth of recessed high voltage component
	D5	depth of recessed low voltage component

[0043] FIG. 1 depicts a first embodiment of an electrical box assembly 20 according to the present invention. The recessed electrical box assembly 20 includes a box member 22 and a frame member 24. The box member 22 includes an electrical box 26 for accommodating high voltage components (not shown) and open areas 28 having connection points 30 for accommodating low voltage components (not shown).

[0044] With reference to FIG. 2, a first embodiment of the box member 22 includes a forward extending peripheral wall 32 and a back wall 34. The electrical box 26 includes sidewalls 36 and is integral with the back wall 34 of the box member 22. The connection points 30 are provided on the back wall 34 of the box member 22 typically on opposing sides 38 of the open areas 28. The peripheral wall 32 of the box member 22 includes sidewalls 40 and apertures 42 are provided in the sidewalls 40. The peripheral wall 32 of the box member 22 includes an inner edge 44 at a juncture 46 with the back wall 34 of the box member 22 and an outer edge 48 with the apertures 42 in the peripheral wall 32 adjacent or very close to the inner edge 44. The peripheral wall 32 of the box member 22 includes a bottom wall 50 and loop members 52 in linear alignment along the bottom wall 50. The loop members 52 extend across the juncture 46 of the bottom wall 50 and the back wall 34. The electrical box 26 includes bosses 54 that are integral with the sidewalls 36 of the electrical box 26.

[0045] Referring to FIGS. 3-4A, threaded bores 56 are provided in the bosses 54 of the electrical box 26. The electrical box 26 includes a rear wall 58 that closes the rear of the electrical box and provides a high voltage enclosure 60 therein. As shown at the cutaway portion of the peripheral wall 32 in FIG. 4, the peripheral wall 32 of the box member 22 includes a depth D1 as measured from the inner edge 44 to the outer edge 48. The box member 22 includes a plurality of bosses 62 extending inward from the peripheral wall 32. The peripheral wall 32 of the box member 22 further includes a flared portion 63 near the outer edge 48 at both the top and bottom ends of the peripheral wall 32. As shown in FIG. 3, the connection points 30 for the low voltage components may include connection points 30A aligned for vertical connection of the low voltage components and connection points 30B aligned for horizontal connection of the low voltage components.

[0046] With reference to FIGS. 5-7, a first embodiment of the frame member 24 includes a rearward extending peripheral flange 64 and a transversely extending flange 66. A plurality of guide members 68 is provided on the peripheral flange 64, with each guide member 68 positioned along the inner edge 69 of the transverse flange 66 of the frame member 24. The transverse flange 66 of the frame member 24 includes apertures 70 therein.

[0047] Referring to FIGS. 8 and 9, there is shown an attachment arrangement 72 for securing the frame member 24 to the box member 22 to create the recessed electrical box assembly 20 of the present invention. The attachment arrangement 72 includes fasteners 74 which are secured through each guide member 68 on the peripheral flange 64 of the frame member 24 into a corresponding boss 62 (see FIG. 2) on the peripheral wall 32 of the box member 22. To secure the frame member 24 to the box member 22, the peripheral flange 64 of the frame member 24 is aligned with the peripheral wall 32 of the box member 22. With the frame member 24 thus aligned with the box member 22, each guide member 68 in the frame 24 is aligned with a corresponding boss 62 in the box member 22. As shown in FIG. 8, the connection points 30 for low voltage components (not shown) include apertures 76 on opposing sides 38 of the open areas 28 in the back wall 34 of the box member 22.

[0048] As shown in FIG. 10, after the frame member 24 is secured to the box member 22 to form electrical box assembly 20, the electrical box 26 projects from the back wall 34 of the box member 22 and the sidewalls 36 and rear wall 58 of the electrical box 26. The sidewalls 36 and rear wall 58 of the electrical box 26 thereby create a high voltage enclosure 60 that isolates any high voltage wiring or components therein (not shown) from nearby low voltage components.

[0049] For operation of the electrical box assembly 20 of the present invention, reference is made to FIG. 11. An installer first cuts a hole 78 in the sheet rock 80 or similar wall covering on a wall 82 thereby exposing a stud 84. The box member 22 is inserted into the hole 78 until the transverse flange 66 is flush with the surrounding wall 82. The electrical box assembly 20 includes a mounting arrangement 86 for securing the box member 22 to the stud 84 and thereby positioning the back wall 34 of the box member substantially within the wall 82. The mounting arrangement 86 for securing the box member 22 to the stud 84 includes mounting fasteners 88 that are secured through the apertures 42 in the peripheral wall 32 and into the stud 84 thereby securing the box member 22 to the stud 84. After the box member 22 is secured to the stud 84, the frame member 24 is secured to the box member 22 by tightening the fasteners 74 of the attachment arrangement 72 through the guide members 68 of the frame 24 and into the bosses 62 on the peripheral wall 32 of the box member 22. As an alternative to fastening the frame 24 to the box member 22 with the attachment arrangement, the frame 24 may be secured directly to the wall 82 by driving fasteners 87 through alternative apertures 89 in the transverse flange 66 into the wall 82. A high voltage component such as the duplex power receptacle 90 can be secured to the electrical box 26 by fasteners 92 and a cover plate 94 attached thereto. Low voltage components such as the CATV connector plate 96 can then be secured with fasteners 98 to the connection points 30 surrounding the open areas 28.

[0050] Referring to FIG. 12, after the electrical box assembly 20 is secured to the wall 82 and electrical components installed therein, all electrical components, such as the duplex receptacle 90 shown, are recessed within the wall 82 by at least the depth D1 of the peripheral wall 32 of the box member 22. Preferably the electrical components are recessed from the outer edge 99 of the electrical box assembly 20 by between 1 and 2 inches. Most preferably, the electrical components are recessed from the outer edge 99 of the electrical box assembly 20 by at least 1.5 inches. With the electrical box assembly 20 recessed within the wall 82 as shown, the plug ends 100 of cords 102 or connector ends of low voltage cables (not shown) are protected from being dislodged by contact from vacuum cleaners or similar hazards.

[0051] With reference to FIG. 13 there is shown a completed installation of an electrical box assembly 20 of the present invention in a wall 82. The electrical box assembly 20 includes a duplex receptacle 90 and cover plate 94, a horizontally oriented CATV connector 104, a vertically oriented CATV connector 106, and a horizontally oriented telephone jack 108.

[0052] As shown in FIG. 4 or 9, the electrical box 26 of the present invention may include a depressed area 110 in one of the sidewalls 36 and a knockout or removable wall portion 112 therein in the depressed area 110. The depressed area 110 in the sidewall 36 enables the use of electrical fittings or connectors such as the Black Button™ push-in connector 114 for connecting non-metallic cable to electrical boxes, which is available from Arlington Industries of Scranton, Pa. The depressed area 110 permits use of the connectors 114 without projecting from the sidewall 36 and interfering with placement of the electrical box assembly 20 in locations where space is tightly restricted.

[0053] With reference to FIG. 14 there is shown a second and preferred embodiment of an electrical box assembly 200 according to the present invention. Although the electrical box assembly 200 is depicted with a box member 202 and a frame member 204, the electrical box assembly could also be constructed and provided in one piece, with the frame member 204 integral with the box member 202.

[0054] Referring to FIG. 15, the box member 202 includes a rearward extending peripheral sidewall 206 having a front edge 208. The box member 202 includes a first portion 209 and a second portion 210 with a back wall 212 closing off the box member 202 at the first portion 209. An electrical box 214 extends rearward from the second portion 210 of the box member 202. The electrical box 214 includes sides 216 and a rear wall 218. Connection points 220 are provided in the electrical box 214 for later connecting an electrical component (not shown) thereto. The first portion 209 of the box member 202 includes a first sidewall portion 222 and the second portion 210 of the box member 202 includes a second sidewall portion 224 with the second sidewall portion 224 extending to a greater depth from the front edge 208 than the first sidewall portion 222. The second sidewall portion 224 includes a rear edge 226 and a short wall 228 extending transversely at the rear edge 226. The first sidewall portion 224 terminates in an edge 230. The sides 216 of the electrical box 214 extend rearward from the edge 226 of the short wall 228.

[0055] As shown in FIG. 15, the interior of the box member 202 includes a plurality of stiffening ribs 232 extending from the back wall 212 and along a substantial portion of the peripheral sidewall 206 toward the front edge 208. Additionally, as shown in FIG. 16, exterior ribs 234 project from the exterior surface of the short wall 228 and along the exterior surface of the sides 216 of the electrical box 214.

[0056] With reference to FIG. 16, the peripheral sidewall 206 of the box member 202 includes an outer surface 236 and tabs 238 extending from the outer surface 236. The tabs 238 include a first end 240 flush with the front edge 208 of the box member 202 and a second end 242 at a distance D2 (see FIG. 20) from the front edge 208. Preferably, the distance D2 is between 0.25 and 0.75 inches for later aligning the front edge 208 of the box member 202 at a proper offset from a stud for accommodating sheetrock thereon (see FIG. 27).

[0057] Referring to FIG. 17, the connection points 220 in the electrical box 214 include integral bosses 244 extending from opposing sides 216 of the electrical box 214 and bores 246 in the bosses 244. As shown in FIG. 17, the electrical box 214 is a two-gang box that includes space for two electrical components (not shown) and includes two sets of integral bosses 244. The box member 202 includes a plurality of openings 248 in the back wall 212 for later accommodating low voltage electrical components (not shown). The openings 248 include connection points 250 in the back wall 212 for securing low voltage components thereto. The connection points 250 for the low voltage components include bosses 252 on opposing sides of the openings 248 in the back wall 212 of the box member 202.

[0058] As shown in FIG. 17, the preferred embodiment of the electrical box assembly includes a two-gang electrical box 214. Opposing sides 216 of the electrical box 214 include grooves 254 therein for dividing the two-gang box into single electrical boxes. A divider wall 256, such as that shown in FIG. 19, can be inserted or slid into the grooves 254 to dividing the electrical box into two single electrical boxes.

[0059] As shown in FIG. 18, one or more sides 216 of the electrical box 214 are provided with removable wall portions or knockouts 258. The knockouts 258 are removed to provide openings for passage of electrical cable (not shown) into the electrical box 214. Additionally, the knockouts 258 can have electrical fittings or connectors inserted therein for connecting electrical cables to the electrical box.

[0060] With reference to FIG. 20, the peripheral sidewall 206 of the box member 202 further includes a top wall portion 260 and a bottom wall portion 262. A loop member 264 is provided on the bottom wall portion 262 and on the top wall portion 260. The loop members 264 extend from the back wall 212 to the top or bottom wall portions 260, 262 and include an opening 266 therein. The loop member 264 can be used for bundling and holding cables and wiring (not shown) against the back wall 212 of the box member 202.

[0061] Referring to FIGS. 21-24, the frame member 204 portion of the electrical box assembly is shown. The frame member 204 includes a transverse flange 268 and a rearward extending peripheral flange 270. The transverse flange 268 includes a top portion 272, a bottom portion 274, and side portions 276. As shown in FIG. 22, mounting apertures 278 are provided in the side portions 276 of the transverse flange 268 and form a portion of a mounting arrangement 280 for mounting the electrical box assembly to a wall.

[0062] With reference to FIG. 25, there is shown the preferred embodiment of the electrical box assembly 200 in alignment with a hole 282 in a wall 284 to be inserted therein and mounted to the wall 284. The mounting arrangement 280 includes the mounting apertures 278 in the transverse flange 268 and mounting fasteners 286 for tightening through the mounting apertures 278 into a stud 288. The mounting apertures 278 in side portions 276 of the transverse flange 268 are preferably spaced apart by a distance equivalent to the spacing D3 between the studs 288. If, for example, the distance D3 between the studs 288 was 16 inches, then mounting apertures 278 are preferably spaced apart by a distance of between 15.5 and 16.5 inches, or most preferably by 16 inches. The hole 282 made in the wall 284 would therefore be made to extend between two adjacent studs. For wood studs 288, wood screws would preferably be used to secure the electrical box assembly 200 to the wall 284. For metal studs (not shown), sheet metal screws or their equivalents would be used to secure the electrical box assembly 200 to the wall 284. A second set of apertures 290 are provided on one side of the transverse flange 268 inward of the mounting apertures 278 for walls with studs spaced apart at a distance of 14.5 inches. For longer stud spacing, one end of the transverse flange 268 would be anchored into a stud in the normal manner and the opposite end would be anchored to the drywall with drywall screws. Also, the electrical box assembly 200 could be constructed in a larger length to accommodate a longer stud spacing.

[0063] As shown in FIG. 25, the electrical box 214 extends at a first depth D4 from the front edge 208 of the box member 202. The low voltage openings 248 extend at a second depth D5 from the front edge 208 of the box member 202. As a result of the electrical box 214 being offset at a greater distance from the front edge 208, any high voltage component, such as the duplex receptacle 292 will be recessed a greater depth D4 within the wall 284 than would a low voltage component 294 such as the CATV outlet plate shown in FIG. 25.

[0064] In the preferred embodiment of the electrical box assembly 200 of the present invention, the box member 202 could be provided in one piece, as shown in FIG. 14, with the transverse flange 268 as an integral part of the box member 202. Conversely, as shown in FIG. 25, the electrical box assembly 200 could be provided with a separate box member 202 and frame member 204. An attachment arrangement 296 for securing the frame member 204 to the box member 202 includes a plurality of bosses 298 on the peripheral sidewall 206 of the box member 202 and a plurality of apertures 300 in the frame member 204. The apertures 300 in the frame member 204 are in axial alignment with the bosses 298 on the box member 202 when the frame member 204 is aligned with the box member 202. Fasteners 302 are used in the attachment arrangement 296 for securing through the apertures 300 in the frame member 204 into the bosses 298 on the box member 202.

[0065] The reader is referred to FIG. 25 for an understanding of the operation of the preferred embodiment of the electrical box assembly 200 including a separate box member 202 and frame member 204. An appropriately sized hole 282 to accommodate the outer periphery of the box member 202 and spanning the distance between two studs 288 is cut in the wall 284. FIG. 25 illustrates a wall having studs spaced a distance D3 apart on their centers. The frame member 204 is then secured to the box member 202 using fasteners 302 through apertures 300 of frame member 204 into bosses 298 in box member 202. Cables are then fed through the appropriate openings including knockouts 258 for high voltage cables or through openings 248 for low voltage cables. The cables (not shown) can be routed through loop members 264 to hold them within the box member 202. The electrical box assembly 200, consisting of the frame member 204 secured to the box member 202, is then secured to the wall using the mounting arrangement 280 including mounting fasteners 286 secured through mounting apertures 278 in the transverse flange 268 and into apertures 304 and the studs 288 in the wall 284. High voltage components, such as the duplex receptacle 292 shown, are then secured to the high voltage connection points 220 within the electrical box assembly 200 and low voltage components, such as the CATV outlets 294, are secured to the low voltage connection points 250 within the electrical box assembly 200.

[0066] With continued reference to FIG. 25, in the case of installing the electrical box assembly 200 on a newly constructed wall in which the sheetrock 306 has not yet been installed, tabs 238 are used to align the box member 202 against the bare studs. In this situation, the second or rear ends 242 of the tabs 238 are placed against the face 308 of the studs 288, which would position the box member 202 at the correct distance to place the front edge 208 of the box member 202 approximately flush with the eventual face of the installed sheetrock 306. Fasteners 310 are secured through apertures 312 in the peripheral sidewall 206 of the box member 202 to temporarily secure the box member 202 to the wall until the sheetrock 306 is installed and the frame member 204 is secured to the box member 202 and to the wall 284 by mounting arrangement 280.

[0067] The reader is referred to FIG. 26 for an understanding of the operation of the one-piece preferred embodiment of the electrical box assembly 314 in which the transverse flange 268 is an integral portion of the box member 202. An appropriately sized hole 282 to accommodate the outer periphery of the peripheral sidewall 206 of the box member 202 and spanning the distance between two studs 288 is cut in the wall 284. Cables (not shown) are then fed through the appropriate openings including knockouts 258 for high voltage cables or through openings 248 for low voltage cables. The electrical box assembly 314, consisting of the one-piece box member 202, is then secured to the wall using the mounting arrangement 280 including mounting fasteners 286 secured through mounting apertures 278 in the transverse flange 268 and into apertures 304 and the studs 288 in the wall 284. High voltage components, such as the duplex receptacle 292 shown, are then secured to the high voltage connection points 220 within the electrical box assembly 314 and low voltage components, such as the CATV outlets 294, are secured to the low voltage connection points 250 within the electrical box assembly 314.

[0068] As shown in FIG. 27, after the electrical box assembly 200 has been secured to the wall 284, both high voltage components 292 and low voltage components 294 are recessed substantially within the wall 284, thus protecting the components. High voltage components such as the duplex receptacle 292 shown are offset a distance D4 and low voltage components 294 are offset a distance D5. The greater offset of the duplex receptacle 292 provides ample space for protecting plug ends 316 of electrical cords 318 while they are in use and plugged into the duplex receptacle 292.

[0069] As shown and described herein, the current invention provides an improved electrical box assembly 200 or 314 that has the advantage of accommodating two high voltage components and recesses the high voltage components farther within the wall. It also provides the advantage of an extended flange for more secure mounting of the electrical box assembly to a wall.

[0070] The electrical box assembly of the present invention could be constructed of metal or plastic but, most preferably, is molded of plastic. In a first method of construction, the box member 202 of the present invention is molded in one piece of plastic and the frame member 204 is also molded in one piece of plastic. In a second method of construction, a single piece is molded in one piece of plastic with the single piece being a box member including a transverse flange as an integral molded portion of the box member thereby negating the need for a separated frame member. Suitable plastics include polycarbonate and polyvinylchloride.

[0071] Having thus described the invention with reference to a preferred embodiment, it is to be understood that the invention is not so limited by the description herein but is defined as follows by the appended claims.