US908691A - Keyless combination-lock. - Google Patents

Description

s.. J. NIELSEN. KEYLESS COMBINATION LOOK. APPLICATION FILED JUNE 26, 1905. RENEWED MAY 26, 1908.

908,691 Patented Jan 5, 1909.

A mm [W III M22! w Wm) SOREN JUUL NIELSEN, OF COPENHAGEN, DENMARK.

KEYLESS COMBINATION-LOCK.

Specification of Letters Patent.

Patented Jan. 5, 1909.

Application filed June 26, 1905, Serial No, 267,156. Renewed May 25, 1908. Serial N 0. 434,876.

To all whom it may concern:

Be it known that I, SoREN J UUL NIELSEN, retired master mariner, a subject of the King of Denmark, and a resident of Copenhagen, Gasvarksvej 23, in the Kingdom of Denmark, (whose postal address is S. J. NIEL- SEN, care of Mr. Bonnicart, 71 Rue Servan, Paris, France,) have invented a new and useful Keyless Combination-Lock, of which the following is a specification.

My invention relates to a keyless-oombination-lock, which can be unlocked or locked without a key and consists in any preferred number of adjustable rods made of iron or other metal and connected together in pairs.

The lock can be advantageously applied to drawers, particularly to shop-tills; it occupies little space, does not get out of order, is free from springs and complicated mechanism and therefore durable.

In the accompanying drawing :Figure 1 is a front view, Fi 2 a horizontal section and Fig. 3 a verticaT section of the lock.

The lock illustrated in the drawing consists of five short and five long rods, which are connected in pairs b means of flatheaded screw- bolts 12, 13, 14:, 15, and 16, which run through suitable apertures formed in the shorter rods 1, 2, 3, 4, and 5 and through slots 17 formed in the longer rods 6, 7, 8, 9, and 10 and terminate in the screwthreads, which engage in loose nuts 18.

when the rods have been connected in pairs in this way, the pairs of rods are placed 1n a row in recesses in a frame 11, in which they assume their position of rest when the front rods stand on a ledge 21, said ledge being a part of frame 11. The lock is covered in front by a slab 19 in which an opening 20 is formed for the purpose of allowing sufficient play for the heads of the screws.

Each pair of rods, for example, the pair 2, 7, Fig. 3 forms a separate safety lock (in form of a sliding-bolt). W hen the back rod 7, the len th of which corresponds to the depth of tTle drawer, is pushed down rela tively to the front rod 2, so that its lower end projects a suflicient distance below the lower end of rod 2, and fixed in this position by fastening the screw-nut 18, the back rod will engage in a groove 22, formed in the upper 1 part of the wood underneath the drawer, constituting the bottom plate for the drawer when the front rod under the action of gravity assumes its position of rest on the ledge 21, so that the lock will remain locked until the back rod is removed from the groove by the head of the screw-bolt 13 being raised and thereby the front rod removed from the position of rest. If, however, the back rod has been fixed so that its upper end projects to the same extent as the lower end, when the head of the screw-bolt is raised, the back rod will engage in a groove 23 formed in a guide board above the drawer, so that the lock is locked instead of opened.

The adjustment is evidently made from the inside of the drawer when the same is open. The arrangement of several pairs of rods insures a large number of possible combinations, so that the lock can only be opened by a person familiar with the combination, as the non-adjusted rods lock above, when they are raised by those not in the secret of the adjustment. By means of five pairs of rods thirty one different adjustments are possible.

In Fig. 1 the lock is represented as being locked by means of the rods 7, 8, and 10 in which case it is opened by raising the heads of the screw- bolts 13, 14, and 16 (Fig. 2) and while pulling the drawer the respective screw-bolts are kept up with the fingers and serve at the same time as handle or handles for the pulling out of the drawer.

Having thus described my invention, what I claim as my invention and desire to secure by Letters-Patent, is:

A keyless-combination-lock comprising in combination a frame at the front end of the drawer to be locked, a ledge in the bottom end of the frame, a slab with a horizontal slot for covering the front surface of the frame, an upper guide board for the drawer having a groove in its lower surface and a bottom plate for the drawer having a groove in the upper surface, a number of vertical rods shorter than the height of the frame standing on said ledge, each provided with an aperture, an equal number of longer rods close behind said short rods, having longitudinal slots and adapted to engage with the groove of the bottom plate or with the groove of the upper guide board according to their posi- In testimony whereof I affix my signature tion With regard to the front rods, and fiatin presence of two Witnesses. headed screw bolts located in the apertures 1 of the front rods and projecting with their SORH'N U NIELSEN 5 heads through the slot of the slab, substan- WVitnesses:

tially as described and shown and for the BERI-IN. LARsEN,

purpose set forth. G. V. NIELSEN.

Images