US1199639A - Lock. - Google Patents

Description

A. F. W. VIEHWEGER.

LOCK.

APPLICATION FILED MAY26.1916. v 1 ,1 99,639. v Patented Sept. 26,1916.

7 f Z5 Z6 E F Q I A 6/2 0 2/ 1 o I "1 /5 L I I6- I; 9

rran sra'ras PATENT W AUGUST F. W.v VIEHWEGER, OF I-IOBOKEN, NEW JERSEY.

LOCK.

Specification of Letters Patent.

Original application filed April 7, 1916, Serial No. 89,607. Divided and this application filed May 26, 1916.

Serial No. 100,068.

To all whom it may concern Be it known that I, AUGUs'r F. W. VIEH- WEGER, a subject of the Emperor of Germany, residingat Hoboken, in the county of Hudson and State of New Jersey, have invented certain newcand useful Improvements in Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to improvements in looks and the present application is a division of an application filed by me April 7, 1916, Serial No. 89,607.

The object of the present invention is to improve the construction of locks and latches and to provide a simple, practical and comparatively inexpensive lock adapted to be readily applied to doors and equipped with means for securely latching the bolt in an extended or engaging position to prevent he same from being retracted by a key.

With these and other objects in view, the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended; it being understood that various changes in the form, proportion, size and minor details of construction, within the scope of the claims, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawing Figure 1 is a vertical longitudinal sectional view of a lock constructed in accordance with this invention, Fig. 2 is a transverse sectional' view on the line 22 of Fig. 1, Figs. 3 and 4 are detail perspective views of the latch bolt, Fig. 5 is a detail view of the hub member. of the knob for actuating the bolt from the-interior, Fig. 6 is a detail view of the key.

Like numerals of reference designate corresponding parts in-the several'figures of the drawing.

In the accompanying drawing in which is illustrated the preferred embodiment of the invention, the lock or latch comprises in its construction a slidable bolt 1 mounted in a casing 2 and adapted to project from one end thereof through an opening 3 for engaging a suitable keeper, not shown. The lock casing which may be of any desired construction is preferably provided with a removable face plate 4 having a flange 5 designed to be arranged in a suitable mortise or recess atthe edge of the door. The bolt is provided at its rear portion with a longitudinal slot 5 'in which extends 'a horizontally disposed supporting and guiding arm 6 having an attaching portion 7 which is suitably secured to the rear wall of the lock casing as clearly illustrated in Fig. 2 of the drawings. The bolt is provided at the inner side with upper and lower shoulders 8 which are adapted to be engaged by a hub member 9 pivoted intermediate of its ends to a spindle 10 of a knob 11 located at the inner face of the door, not shown, and adapted to be turned to cause the hub'member to engage one or the other of the upper and lower shoulders 8 for retracting the slidable bolt 1 against the action of a coiled spring 12. The coiled spring 12 which is secured at its casing is connected at its forward end to the upper arm ofan inclined lever 13 fulcrumed intermediate of its ends on a pivot let and having in its lower arm a slot 15 for the reception of a suitable pivot 16 that is carried by the bolt. The pivot 16 which may consist of a screw is mounted in an opening 17 of the slidable bolt which is normally mainrear end to the upper portion ofthe lock tained in an extended position by the spring 7 12. The pivot 14 of the lever 13 has also mounted on it a catch 18 extending upwardly and forwardly from the pivot 14: and consisting of an arm provided with a lower engaging portion or tooth 19 and normally supported in an elevated position with the said tooth 19 out of engagement with a recess 20 of the bolt by a leaf spring or plate spring 21. w The spring 21 is secured at its rear end to the upper wall of the lock casing and the forward end is connected with the front portion of the arm of the catch as clearly illustrated in Fig. 4 of the drawing. The catch may consist of a single piece of sheet metal bent to form the tooth or engaging portion and a flange 22 which engages the front end of the spring 21. The notch or recess 20 is formed in the upper edge of the slidable bolt at the front portion thereof and it is located below the tooth or a knob 35.

engaging portion of the catch when the bolt is in its extended position. The catch is adapted to be depressed and maintained in engagement with the recess 20 by an operating device 23.

The operating device 23 consists of a head and a stem 24 provided with projecting lugs 25 adapted to extend through slots 26 in the top wall of the casing so that the operating device 23 may be depressed and partially rotated to force the catch into engagement with the latch bolt and lock the catch in such engagement. This will effectually prevent the bolt from being retracted or operated from the exterior.

The slid-able bolt is provided in its lower portion with a recess 27 forming a shoulder 28 and adapted to receive the engaging portions 29 of a key 30 for enabling the key to engage the shoulder 28 and retract the bolt. The key is provided with spaced bits 31 which may be arranged in a variety of ways which are also adapted to pass through recesses 32 of a slidable contact member 33 preferably consisting of an arched piece of metal which is connected at a point intermediate of its ends to a stem or shank 3st of The stem or shank 34: extends through a slot 36 in the lower wall of the latch casing and it is adapted to be engaged by a key and to be moved into electrical engagement or contact with a fixed contact member 37. The lock casing is provided at the outer side with a key hole 38 for the introduction of a key in the usual manner and any attempt to pick the lock with an ordinary key or pick will result in moving the contact member 33 into engagement with the contact member 37. This will operate to close the circuit which may be equipped with any suitable signal not shown, as set forth in the aforesaid application. The

, contact member 37 is mounted on the stem or screw 39 of a binding post 4% with which a wire 45 is connected. The lock casing is also provided with a binding post 40 having a wire 41 connected to it. The binding post 44 with which the contact 37 is con nected is insulated from the lock casing not shown.

No claim is made in the present application to the circuit closing means as this of the lever and a catch mounted on the pivot of the lever and arranged to engage the bolt for locking the same in its extended position. 7

2. A lock of the class described including a slidable'bolt, a lever fulcrumed intermediate of its ends and arranged at an inclination, its lowerarm being provided with a slot, a spring connected with the upper arm of the lever, a pivot mounted on the bolt and operating in the slot of the lower arm of the lever and a catch mounted on the pivot of the lever and having an engaging portion arranged to hold the bolt in its extended position, a spring for normally supporting the catch in an elevated position out of engagement with the bolt and an exteriorly operable device provided with means for forcing the catch into engagement with the bolt and for locking the catch in such engagement.

3. A lock of the class described including a slidable bolt, provided in its upper edge with a recess, a pivoted catch having a depending engaging portion arranged to extend intovthe said recess, a spring connected with the catch for supporting the same in an elevated position and an exteriorly operable device consisting of a stem or shank extending through the lock casing and ar ranged to depress the catch, said lock casing having opposite slots and the device being provided with projections adapted to pass through the slots and to be turned out of alinement with the same for holding the catch in its engaging position.

In testimony whereof I aflix my signature in presence of two witnesses.

AUGUST F. W. VIEHWEGER.

Witnesses CHARLES FAIsT, THORVALD BALSLOW.

Gopies of tibia patent may be obtained for five cents each, by addressing the "Oosioner of flatento, Washington, D. C.

Images