US1345020A - Combination-lock - Google Patents

Description

J. NASLUND.

' CDMBiNATION LOCK. APPLICATION EILED APRJS, 1920.

Patented June 29, 1920.

PATENT OFFICE.

JONAS NAsLUND, or RIMBO, SWEDEN.

COMBINATION -LOGK.

Specification of Letters Patent.

Patented June 29,1920.

Application filed April 15, 1920. Serial No. 374,169.

To all whom it may concern:

Be it known that I, 'JoNAs Ni'isLUND, subject of the King of Sweden, residing at Rimbo, in the Kingdom of Sweden, have invented certain new and useful Improvements in Combination-Locks, of which the following is a Specification. Y

My present invention has for its object a combination-lock which can be opened only if the person operating the same knows the necessary combination of mutual positions of a number of rotary rings. known combination locks have beenbased on'certain combinations of figures or letters which is, however, objectionable dueto the impossibility of opening such locks in darkness orat dim light.

According to my present invention a number of rings are rotatabl mounted on a core and the main feature 0 the invention consists in this that each ring is provided with a, handle or projection and that all rings are located within a casing provided with a longitudinal slot through which said projections extend. For opening the lock it is necessary to place the projections of the different rings in certain positions which correspond to the combination being characteristic for the lock. For making it easier to open the lock in darkness some or at least one of the projections can be of different length than the other ones.

Other features of my invention will be made clear in the following description of some forms of embodiment shown on the accompanying drawing.

Figure 1 is a side view of the invention having the shape of the padlock. Fig, 2 is an end view of the same. Fig. 3 is a section along the line II-II of Fig. 1. Figs. 410 show different details. Figs. 11 and 12 show different examples of combinations. Fig. 13 shows a modification.

The cover of the lock is designated by 1 and 2 is a longitudinal slot in the same adapted to receive the shackle 3. Within the cover is located a cylindrical core 4, made for instance of wood, and provided on its circumference with guides for a number of locking devices 5 rotatably located on the core and each provided with a handle or projection 6 extending through a longitudinal slot 7 provided in the cover. Each of the said ring shaped devices is provided with an opening 8 which on the different devices Hitherto or someof them is located at different places with relation to the handle 6 (see Figs. 4 and 5). All the devices can be placed elther in the position shown with full lines or in the position shown with dotted lines in Fig. 3 or in the middle position betweensaid end positions. In a certain position of the different devices corresponding to the opening position the openings 8 are in front of the opening 2 in the cover so that the shackle- 3 can be inserted into a longitudinal slot 9 in the core 4, while, when one or several of the devices occupy another position, one

or. several of the openings are displaced relatively to the other so that one or several of the difi'erent rings then go through the opening 10 in the shackle so as to keep the same secured to the lock. The shorter curved end of the shackle is in looking position introduced into a groove 11 provided in the end surface of the cover, see Figs. 1 and 2. Fig. 9 shows the shackle in elevation and Fig. 10 is a section along line IIIIII in Fig. 9.

The guides for the locking devices 5 may consist either of grooves 12 provided in the circumference of the core (Fig. 6) or of distance pieces 13 located on said circumference (Figs. 7 and 8).

Fig. 11 shows an example of a certain scheme of combination, the points indicating the handles 6. If there are ten locking devices numbered 1, 2, 3, etc., it is required in the cited example that the handles 2, 5 and 8 are placed against the one edge of the longitudinal slot 7 and the other ones against the other edge of the same in order to make possible the opening of the lock. The key of the lock is thus according to the said example 258. It is obvious that a very great number of combinations are possible. The openings 8 in the rings are preferably located in such a manner that they are in locking position when the handles 6 are in a straight line.

In order to make the opening of the look more complicated it is also possible to have, besides the above mentioned end positions,

- also a middle position for some of the hanwhere two members A and B are tobe locked together, the shackle 3 being thenfastened to the one member A and the cover 1 to the other member B.

I claim: 1

1. A combination lock including a cylindrical casing having a longitudinal slot, a core mounted within the casing provided with a longitudinal groove, a shackle having a longitudinal slotted extension slidably arranged in the groove'in the core, and a plurality of ring-like elements rotatably mounted on the core within the casing having portions cut away so that the remain,-

ing portions of the ring-like elements are of various sizes and designed for engagement with the slotted extension of the shackle for locking the shackle within the casing, and means for facilitating the turning of the ring-like elements so as to disengage fthering-like elements from the slotted extension to permit of the release of a the shackle.

2. A combination lock comprising a cylindrical casing provided with a longitudinal slot, a core located within the casing provided with a plurality of annular grooves on its outer surface and with a longitudinal groove'opening at its outer surface for intersecting the annular grooves, a

shackle havinga"longitudinally slotted extension slidably received" within the longitudinal groove within the core, a plurality of ring-like elements rotatably mounted in the annular grooves and having a portion cut away to form-an opening, a pro ect1on 011 each ring-like element extending through the slot and the projections being located at different pointson the ring-like elements so that when shifted in one direction portions of the elements adjacent'the openings will be engaged with the slot in the extension for the locking of the shackle or. when shifted in another direction the openings in the ring-like elements will be registered so that the ends thereof will lie on opposite sides of the groove to'permit-of the release of the shackle.

In testimony whereof I'have afiiXed my signature in the presence of two witnesses.

\Vitnesses STURE GIDINGER, S. HonNssoN.

JONAS NASLUND.

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