Underwater Camera Casing

Some very excellent cameras are constructed with pushbutton operated motor driven exposure and film advance mechanisms and also have detachable and interchangeable lens units that are secured to the camera body by bayonet or screw threaded attachments or the like. These cameras, particularly the through the lens reflex types, are ideal for underwater use if they can be suitably enclosed in a waterproof casing and, of course, it is desirable that such casing be easy and reliable to use, while at the same time being inexpensively constructed in a durable form.

The following patents disclose waterproof camera housings of the general type referred to but they do not disclose an arrangement specifically intended for use in particular cooperation with a camera body having a removable lens unit, as provided by the subject invention:

U.s. pat. No. 3,026,784 Byers

U.s. pat. No. 3,162,107 Byers

U.s. pat. No. 3,838,434 Hughes et al

According to this invention a waterproof camera casing is formed as a pouch of flexible molded waterproof material, such as rubber, plastic, synthetic rubber or the like. The pouch is molded to have front and back walls with side walls extending all around to form an upper camera body portion and a lower body portion with a side opening extending in the side wall from the top of one side of the upper and lower body spaces to the top of the other side of the upper and lower body spaces. A waterproof closure, such as a waterproof zipper, is provided for the side opening and the lower body space enables a human hand to insert and position a camera body in the upper camera body space of the pouch when the side opening zipper is opened. A lens opening is provided in the front wall of the upper body space through which a detachable lens unit may be extended to connect with and secure the camera body in position within the pouch. Suitable waterproof sealing means, such as a simple O-ring, provides a water tight connection between the lens unit and the pouch wall when the lens is inserted and connected to the camera body within the pouch. Since the molded pouch is formed of flexible material, a protrusion may be preformed in the molded body into which the camera trigger mechanism may extend to be operated by suitable external trigger pressure on the protrusion. Also, transparent openings may be provided in the pouch walls at appropriate points to enable the functions of the camera and sighting through the lens unit to be observed. In a preferred form of the invention, the lens opening in the front wall of the pouch may be formed as a ring of relatively hard material to provide a secure placement and attachment of the camera body within the pouch when the lens unit is inserted through the lens opening and connected to the camera body.

Other features and advantages of the invention will be apparent with reference to the following description in connection with the drawings.

FIG. 1 is a perspective elevation of the pouch;

FIG. 2 is a side elevation of a removable waterproof lens unit that may be used with the invention;

FIG. 3 is a side sectional view showing the manner of assembling the camera and lens to the waterproof pouch; and

FIG. 4 is a side elevation view of the waterproof pouch with camera enclosed and assembled to the removable lens unit.

Referring to the drawings, and most particularly to FIG. 1 of the drawings, the waterproof camera housing of the invention is shown as a molded preformed pouch body constructed to have front and back walls with a side body wall extending all around and made of flexible and waterproof sheet material, such as rubber or the like, to a form providing an upper camera body space 10 and a lower space 11. An opening 12 extends around the side wall of the pouch from the top of one side of the camera body space 10 to the top of the other side of the body space and a waterproof closure, such as a zipper 13, is provided therefor. The upper front wall of the pouch is provided with a lens opening 15 adjacent the camera body space 10 through which a removable waterproof lens unit 20 (FIG. 2) may extend when assembled to a camera body within the pouch. A transparent window 16 enables the exposure number indicator of the camera body to be viewed externally when the camera is in place. A flexible protrusion 17 is preformed as shown and the camera trigger 21, see dotted lines of FIGS. 3 and 4, may extend into the protrusion to be depressed by external manual pressure thereon for operating the camera, which as previously mentioned, may be of the motor driven exposure release and film advance type operated by a single trigger machanism, as well known in the camera art.

As shown in FIG. 2, a waterproof adjustable lens unit 20 having bayonet connections 22 for detachable connection to a camera body is used with the waterproof casing of the present invention. A simple O-ring seal 23 may be applied to the lens unit 20 or alternatively may be positioned within the lens opening 15 to provide a waterproof seal when the camera and lens are assembled to the waterproof pouch, as shown by FIGS. 3 and 4 of the drawing. In the preferred form of the invention, the lens opening 15 is circular to cooperate with a circular removable lens unit 20 but it is obvious that the lens opening may have any suitable configuration to conform to a particular configuration of removable lens unit other than circular. Also, in the preferred form of the invention the lens opening 15 is provided with a relatively hard inner ring surface 18 (FIG. 3) to which the O-ring 23 adheres and which provides a more substantial support for the camera body 30 (FIGS. 3 and 4) when secured within the upper camera body space by attachment to the lens unit 20 extending through the lens opening 15.

It is assumed that the preferred form of camera to be used with the waterproof pouch of the invention is a through the lens reflex sighting and focusing type and a transparent viewing window 31 may be provided, as shown by FIG. 3, to enable the camera to be sighted and focused in use. Of course, other forms of cameras may be used, in which case the transparent apertures for using such other types of cameras would be suitably provided in a manner obvious to those skilled in the art.

FIG. 3 of the drawings shows the manner of positioning for assembly of the camera body 30 within the upper body space 10 by one human hand inserted through the lower space 11 when the zipper closed opening 12 is open and with the other human hand inserting the lens unit 20 for attachment to the camera body 30.

It is believed that all of the features and advantages of the invention are now apparent and fully described and additional description of the use of the invention would be redundant. Various obvious modifications within the scope of the appended claims will occur to those skilled in the art. For example, a flap type waterproof closure (not shown) could be provided in place of the waterproof zipper closure that has been specifically described and threaded lens units may be used instead of the bayonet connection type as described.