Jamb Stud

1.Field of the Invention

This invention relates to door jams, and more particularly to a new metal stud for mounting door jambs in drywall construction.

2. Background of the Invention

In present day dry wall (sheet rock/plaster board) construction, a unionized carpenter must be called to a construction site twice, once before the dry wall installers put up the sheet rock, and once afterwards. A unionized carpenter on his initial visit to the construction site, installs wood blocking on the door stud. On his second visit, he completes the door installation.

3. Prior Art

Prior art patents include U.S. Pat. No. 1,544,760 issued Jul. 7, 1925 to Kiefer; he shows a door buck of channel formation having inturned free ends and anchor plates having enlarged heads fitting behind the free ends and laid between adjacent courses of concrete block or the like, to minimize displacement and subsequent cracking of plaster; wood filler blocks in the door buck serve for mounting door jambs. U.S. Pat. No. 1,838,129 issued Dec. 29, 1931 to Baum shows an open metal channel having a wood block and anchors for plaster to be first installed, and then a tile wall (masonary wall) laid; thereafter plaster is applied to the wall and channel, and a door jamb in two portions screwed to the wood block as well as a door stop. U.S. Pat. No. 1,926,673 issued Sep. 12, 1933 to Gregg shows the use of a plurality of adjustable U-shaped anchor members for compensating for vertical inexactness of rough bucks, and securing trim and door jambs thereto. U.S. Pat. No. 3,299,592 issued Jan. 24, 1967 to Cable shows a channeled metal door jamb secured to a metal stud as by spot welding and/or screws, and wallboard secured to both by driving self-threading screws.

Accordingly it is an object of the invention to enable less costly inside wall constructions.

Another object of the invention is enable faster inside wall constructions.

Still another object of the invention is enable such wall constructions using simple materials which are easy to handle.

The objects of the invention are accomplished through the provision of a new type of metal stud that a sheet rock installer can mount and secure plaster board to before a carpenter need be called to mount the door. The new type of metal stud is a generally U-shaped member that has an inwardly extending wide recess or countersink on the outer face of its bight. The studs are mounted in prelocated stud anchors on the floor and ceiling. The legs of the U-shaped member extend parallel to each other and are such that the plasterboards may be directly secured to them as by screws, the recessed mounting of the wood blocking removing the need for the plasterboard to extend beyond the end of the stud.

Only after putting up the plaster board need the carpenter be called. The carpenter then mounts a wood blocking in the recess in the bight of the U-shaped member, securing the blocking to the U-shaped member as by diagonal screws engaging it at the outer inner edges of the inward recess. The carpenter then mounts a conventional door jamb which is secured to the end of the wall by passing screws through the jamb to engage the wood blocking. Vertical spacers behind the jamb are so located as to overlap the sheet rock and the outer edges of the bight of the u-shaped member when the jamb is mounted and to provide a firm backup and mounting for the jamb when the screws are seated in the wood blocking, while at the same time providing a finished appearance.

These and other objects, features, and advantages of the invention will become apparent from a reading of the following description of a preferred embodiment of the invention, when considered with the accompanying drawings wherein:

FIG. 1 is a view of a horizontal cross-section of a wall construction according to the present state of the art; and

FIG. 2 is a view of a horizontal cross-section of a wall construction according to the new invention.

Referring now more particularly to FIG. 1 of the drawing, existing wall construction is shown as involving a U-shaped metal stud 10 which would be mounted upon appropriate anchors on the floor and ceiling about a door or archway. To the bight 12 of the U-shaped stud 10 would be mounted by a unionized carpenter a wood blocking 14 as by screws 16 from the inside of the stud. Thereafter the sheet rock installer would mount the plaster board 18, the plaster board being mounted so that it overlapped the wood blocking including for appearances sake.

After the sheet rock installer was finished, the unionized carpenter would be called back to mount the door jamb 20 (and stop) as by screws 22 extending through the jamb in to the wood blocking. Spacer blocks 24 seated in offsets 26 on the insides of the and the wood blocking 14, complete the appearance.

FIG. 2 shows a wall construction according to the invention. Here a U-shaped metal stud generally indicated by the numeral 30 has a generally flat bight 32 formed with an inwardly extending wide recess or countersink 34 on its outer surface. This stud too is mounted upon appropriate anchors on the floor and ceiling about a door or archway. However, now the sheet rock installers would proceed directly to mount the plaster board 36 on the parallel side legs 38 of the stud as by screws, making sure that the edge of the plaster board reached the bight edge of the stud.

After the sheet rock installers are finished, the carpenter is called for the first time to install the door. To this end, he would mount from the outside the wood blocking 40 into the stud bight recess 34 by inserting screws 42 diagonally therethrough so they pierce the stud at its recess inner corners. Next he would mount the door jamb 44 and stop 46 in conventional fashion, only now the spacing blocks 48 overlap the joint between the plaster board 36 and the metal stud 30.

It will be evident that applicant has provided a new metal stud and a new wall construction and method of achieving same that is less expensive and simple and easy to use.

It will be appreciated by those skilled in the art that other and different applications may be made of the principals of the invention. Accordingly, it is desired to be limited only by the scope or spirit of the appended claims.