US2100679A

US2100679A - Lock

Info

Publication number: US2100679A
Application number: US92129A
Authority: US
Inventors: Wassenhove Antoine
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-07-19
Filing date: 1936-07-23
Publication date: 1937-11-30
Anticipated expiration: 1954-11-30

Description

NOV. 30, A WASSENHQVE 2,100,679

LOCK

" Filed July 23, 1936 2 Sheets-Sheet l F2321 Eye 117 venfor:

Nov. 30, 1937. A. WASSENHOVE LOCK Filed July 23, 1936 2 Sheets-Sheet 2 In vemom- 94,4, WWW

Patented Nov. 30, 1,937

* UNITED STATES LOCK Antoine Wassenhove, Brussels, Belgium Application July 23, 1936, Serial No. 92,129 In Germany July 19, 1935 3 Claims. (01. -307) The invention relates to a latch lock combined with a permutation lock, in which the permutation discs or rings of the lock are movable by a key.

The invention consists essentially in that a common key is used for actuating the locking bolt, the latch bolt and the permutation discs or rings, two key holes, an upper and a lower key hole, being provided in the look. When the key is introduced in normal position into the upper key hole, the locking bolt and the latch bolt can be moved in known way by rotation of the key. If, however, the key is introduced into the upper key hole in a parallel position to the normal but turned through 180, certain of the permutation rings or discs of the lock can be moved by one or more rotations of the key. If, after this, the key is introduced into the lower key hole, other permutation discs or rings are moved by rotation of the key.

In this way it is possible while using a simple, for example grooved key, to combine a normal latch lock and a permutation lock with a plurality of permutation discs or rings into a very secure safety lock.

By a particular construction of the permutation discs or rings used in this look it is further made possible not only to turn the discs or rings to a determined code number or setting during locking, but also to open the look if the operator, who previously turned the discs or rings to the locked setting has forgotten the code, another so-called auxiliary code known to the operator being used to enable the discs or rings to be set and. the lock unlocked without forcible opening. For this purpose the discs are provided on their peripheries with a number, say eleven, of equally spaced similar shaped notches in which the bit of the key engages in succession during the normal movement of the discs, while for use with the auxiliary code a further, for example twelfth, notch of less depth is provided so that, when this notch is in position, the key cannot engage deeply enough and further movement of the discs is thereby prevented. In this way a definite end position is provided for each disc and it is possible starting from this end position to set the discs to the auxiliary code by turning them to the left or right as the case may be, so that unlocking is possible at this setting without it being necessary to remove the lock from the door.

In order to enable the latch lock according to the invention to be used as a simple lock even with the permutation discs set in locking position, a releasable holding device is provided in front of the locking bolt on the appropriate side, by means of which the shot locking bolt is held in the locked position. The lock can then be used as an ordinary latch lock when the holding device is released and the locking bolt is still shot, without the discs haw'ng to be set each time, while with the locking bolt held by the holding device,

opening of the door can be efiected only by the person who knows the code or who can, if necessary, open the door by the aid of the auxiliary code.

A'lock according to the invention is shown by way of example in the accompanying drawings:-

Fig. 1 is aside View of the lock with the looking bolt retracted and with the front wall removed.

Fig. 2 is a front view, partly in section on the line A-A of Fig. 1.

Fig. 3 is a side View of the lock with the locking bolt shot and with the front wall removed, and Fig. 4 shows the provision of a holding device in front of the bolt.

In the figures l designates .the locking plate, 2 the front and backlwalls of the lock case, 3 the latch bolt, 4 the latch button and 5 the locking bolt.

On a pin 6 on the stepped locking bolt 5 a twoarmed lever l is pivoted, whose upper end engages the latch bolt and actuates the latter when, the locking bolt 5 being retracted, the lower arm of the lever is swung in the direction of the arrow, by rotation of the key ill inserted in normal position in the upper key hole 3. It is unnecessary to describe the remaining parts of the combined lever lock and latch which are of known kind and housed in the upper part of the case because their mode of operation is not of importance.

The locking bolt 5 has a downwardly directed extension ll on the end of which are two spaced, parallel, similar tongues I2 which cooperate with the permutation lock and thus convert the look into a safety lock.

The permutation lock comprises two locking discs l3, l3 with their respective permutation discs [4, l4 and a spacing disc l5 between the locking discs. The discs are rotatable in either direction upon a spindle l6 which traverses both casing walls 2.

As the drawings show, each disc l4, M has a number of holes ll, for example twelve, equally spaced and concentric, which are numbered and serve as the permutation indicators for the look.

For this purpose the locking discs I 3, l3 have each on the side facing the respective permutation discs at short pin l8 which can be set in any of the holes I1 as desired and thus couples the disc I4 or I4 to the respective disc I3 or I3. By setting each pin I8 into one or other of the holes ll of the respective discs I4, Hi the lock can be adjusted for any one of a large number of different code numbers.

Each locking disc I3, I3 has a recess I9 for the reception of the corresponding tongue I2 on the extension I I of the bolt 5 when the permutation discs have been correctly set for unlocking.

This setting is seen for example in Figs. 1 and 2 while Fig. 3 shows, with the locking bolt shot, the locking discs I3, I3 in a different position so that in this position retraction of the locking bolt is not possible.

To adjust the permutation discs I4, I4 a bitted key In is used which, when introduced in normal position in the upper key hole 8, can in known manner actuate the latch bolt 3 and with the permutation discs correctly set, the bolt 5 also.

The same key In can, however, be inserted into the upper keyhole 8' axially parallel with the first position but turned through 180 and then serves to move the permutation disc I4 seen on the right hand side in Fig. 2 and with it the associated locking disc I3. The distance plate 20 ensures that the key II) can only actuate the permutation disc I4. The setting is effected by the key bit engaging in succession the, for example eleven, similar notches 22 in the permutation disc I4 until the desired position is reached.

A second, normal key hole 9 is provided at the lower end of the lock, and upon introducing the same key I into this keyhole 9 and turning the key, the permutation disc I4 nearest the left hand side wall 2 of the lock in Fig. 2 together with its locking disc I3, can be rotated. So that the key I0 may only act upon this disc I4, a distance disc 20 is provided on the right hand side wall 2 in Fig. 2.

The step-wise movement of the permutation discs I4, I4 and of the locking discs I3, I3 associated therewith is assisted by leaf springs 2I the ends of which engage in the notches 22 in the peripheries of the permutation discs.

For particular reasons, in this permutation lock the permutation discs I4, I4 can be rotated in both directions by the key I0, but at one particular point of its periphery it cannot be turned further, that is to say rotation of the permutation discs I4, I4 in both directions is only possible up to a definite limit in each direction.

This has the following purpose:-

The code number to which the discs have been turned in locking may be forgotten. In that case without the arrangement described below of the permutation discs I4, I4 in the case of a door lock, the lock would have to be removed from the door and taken to pieces to enable it to be unlocked. To avoid this difficulty, a twelfth notch 23 is provided in the periphery of each permutation disc I4, I4, in addition to the equally spaced, for example eleven, similar notches 22, as shown in Figs. 1 and 3. While now the permutation discs I4, I4 can be turned by the key in either direction when it engages with one of the eleven deep notches 22, this is not possible when the key bit, upon further rotation, reaches the twelfth, shallow notch 23 in the periphery of either permutation disc. From this point the key can only beturned back and the disc rotated in the opposite direction until, after passing the eleven similar deep notches 22, the

shallow notch 23 is again reached so that in this direction also the disc is again checked.

Accordingly by the provision of the shallow notch 23 in the periphery of each of the permutation discs I4, I4 stops are provided from which the discs can only be moved backwards to the right or left as the case may be.

A note will have been taken not only of the set code but also of an auxiliary number so that, if the user has forgotten the particular position to which the discs have been turned in locking, he can still unlock it without taking it to pieces. For this purpose the discs I4, I4 are rotated to right or left until further rotation is prevented by the key reaching the shallow recess 23 in each case. Each disc is then turned back in the appropriate direction so many steps until the pernautation lock reaches the position corresponding tothe auxiliary number. When this has been done, the recesses I9 in the locking dicsc I3, I3 are in line with the tongues I2 on the extension 5. In this position the lock can be unlocked. Advantageously the user chooses as an auxiliary number in originally setting the locking discs in relation to the permutation discs a number which has some special personal significance so that it will not be forgotten.

Since in the lock according to the invention certain movements are necessary to achieve the extremely high degree of security, it is advantageous for daily use to put the permutation part of the lock entirely out of action and use the lock simply as a usual latch lock. To make this possible the bolt is advantageously arranged to project, when shot into its locking position as Fig. 3 shows, and a releasable holding device provided on that side of the bolt 5 in which the bolt is moved in opening of the door or the like, as can be seen in Figures 2 and 4. This holding device can for example consist of a swing member 25 mounted on the appropriate side of the door frame, or of a sliding member, which can be held fast on the door frame by means of a slider 24 or a catch or the like, as Fig. 4 shows for example. In the closed position of the holding device 24, 25 the door can only be opened if the permutation lock is first actuated and the bolt 5 retracted.

If, however, the holding device is released, as indicated in chain lines in Fig. 4, the door fitted with the lock can be opened without operation of the permutation lock and with the bolt 5 still shot. It is then only necessary to move the latch bolt by means of the knob or by the key introduced in normal fashion into the key hole 8.

Naturally many constructional changes may be made in the lock in carrying out the invention. Advantageously the lock can at the same time be constructed as a signalling device in known manner, in order to give an alarm if an unauthorized attempt is made to open it. This can be acontact device which may be constructed in various ways, and the contact devices in a number of similar locks of the same kind can be connected to a common alarm device at a central point. The construction of the look as a signal ling device is advantageously effected by the use of insulated parts in the permutation lock.

I claim:--

1. A door lock, comprising in combination a lock case having a front and rear plate, each plate having two key holes, a bolt slidable in said case, two permutation discs in said case, locking two discs one for each permutation disc, means for coupling one looking disc with one permutation disc to lock said bolt in shot position, a single reversible bitted key adapted to adjust said permutation discs and shoot said bolt, stops on the inner side of one of said case plates, the key being guided by said stops and by the inner side of the other case plate, so that its bit only acts on one of said permutation discs.

2. A door lock as specified in claim 1, in which each of the permutation discs coupled with the locking discs is adjacent one of the case plates, and in which the case has two key holes and the stops are arranged one near each of said key holes, the stop near one key hole being on one plate and that near the other key hole on the other plate.

3. A door look as specified in claim 1, in which the lock case has two key holes and the stops are 5 arranged one near each of said holes, the stop near the upper key hole forming at the same time a guide for the other elements of the lock and for the key when actuating the bolt and its permutation discs.

ANTOINE WASSENHOVE.