US2247249A - Telephone instrument casing lock - Google Patents

Description

June 24, 1941. F. MORTON TELEPHONE INSTRUMENT CASING LOCK Original Filed Feb. 24, 1936 INVENTOR.

I FLOYD MORTON BY I 57 I ATTORNEY.

Patented June 24, 1941 earns 1 TELEPHGNE INSTRUMENT CASENG LUCK Floyd Morton, Maywcod, ill, assigncr, by mesne assignments, to Associated Electric Laboratories, 1110., (Jhicago, 1th., a corporation of Delaware (Cl. til-455) 3 Claims.

The present invention relates in general to telephone station equipment and more particularly to that type of telephone station equipment which is to be used in exposed locations on shipboard, or in other places where adverse climatic conditions are encountered.

The general object of the invention is to provide an improved semi-waterproof casing to house such equipment.

A further object of the invention resides in providing the casing with an improved type of latching and locking mechanism having incorporated a keyhole cover to prevent water from being splashed into the look.

For other features of the invention, described but not claimed in this application, reference may be had to a parent application, Serial No. 65,302, filed February 24, 1936, Patent No. 2,222,114, Nov. 19, 1940, of which the instant application is a division.

The invention will be described hereinafter with reference to the accompanying drawing, in which Fig. 1 shows the entire housing and latching mechanism as it appears from the bottom;

Fig. 2 is a fragmentary view of the latching and locking mechanism as seen from the outside of the housing; while Fig. 3 is a fragmentary view of the latching and locking mechanism as seen from inside the housmg.

Referring to the drawing, the various parts of the telephone are enclosed in a casing i2 which may be of cast aluminum and shaped as shown clearly in Fig. 1. At the back of the casing are projections 56-49 by means of which the telephone can be secured to a wall.

The cover 26, hinged to the casing H2 at 23, is grooved and is fitted with a gasket around its edge. Extending through the cover there is a shaft 22, to which is attached a handle 23. Inside the casing the shaft 22 carries a lug 2: 1 adapted to engage the projection 29 on the casing when the handle is in closed position and hold the cover against the casing. To open the cover the handle is turned counter-clockwise to a vertical position which rotates shaft 22 enough to disengage the lug 2d.

The cover is provided with a lock 2% as shown. The lock is secured to the inside of the cover, see Fig. 3, and has a bolt 21 which lies in the path of the cam 25 on shaft 22. Fig. 3 shows the cam 25 and lug 2 1 in the position they assume when the handle 23 is in open position, and also shows in dotted lines the position these parts assume when the handle is closed. It will be seen that when the handle 23 is moved from open to closed position the shaft 22 will rotate in a counter-clockwise direction, Fig. 3, and the cam 25 will force the bolt 21 into the lock as it changes position, releasing the bolt, however, before the handle reaches closed position. The handle cannot again be moved to open position because the straight face of cam 25 engages the bolt 21. The handle may, however, be raised to about the position in which it appears in Fig. 2, which is enough to expose the face of lock 28 but not enough to disengage lug 2 After raising the handle to the position shown in Fig. 2 a key can be inserted in the lock to withdraw the bolt 21, after which the movement of the handle to open position can be completed.

If it is not desired to use the lock, the bolt 21 may be held out of the path of cam 25. To this end there is provided a member 28 secured to the inside of the cover by means of a machine screw. After the screw has been loosened, the bolt 21 is pressed in by hand, the member 28 is rotated around until its end lies against the end of the bolt, and the screw is tightened up. This holds the bolt out of the way, permitting the handle to be operated at will without the use of a key.

What is claimed is:

1. A latching arrangement including a latch bolt having a latching position and an unlatching position, an operating handle for moving said latch bolt from its latching position to its unlatching position, said handle and said latch bolt forming a unitary structure, a lock having a keyway covered by said handle when said latch bolt is in its latching position thereby to render said keyway inaccessible, and a bolt included in said lock and cooperating with said unitary structure to permit sufficient movement of said handle to uncover said keyway but not sufficient movement thereof to move said latch bolt to its unlatching position.

2. A latching arrangement including a latch bolt having a latching position and an unlatching position, said latch bolt occupying its latching position, a handle, a keyway covered by said handle, said handle effective when moved in one direction first to uncover said keyway and then to move said latch bolt into its unlatching position, a lock normally preventing sumcient movement of said handle in said one direction to move said latch bolt into its unlatching position, but permitting sufficient movement thereof to uncover said keyway whereby said latch bolt may be moved into its unlatching position only by first exterior surface of said wall, a flange on said lever covering the top and at least a portion of the sides of said collar When the lever is in its normal position, a key controlled lock normally restricting the movement of said lever in one direction but operated through said key aperture when said lever is rotated a certain distance in said one direction to permit a further rotation of the lever in the same direction, and means controlled by said lever for unlatching the casing responsive to said further rotation.

FLOYD MORTON.

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