US1286456A - Safety-lock. - Google Patents

Description

F. VOGELSANG.

SAFETY LOCK.

APPLICATION FILED MAR. 1s. |915.

Patented Dec. 3, `1918.

W'wesses:

i l y l i@ 11;

` SAFETY-Loox.

mecano.

i `Application filed March 16, 1915. SerialNo. 14,755,

To all 'whom t may concern:

Be it known that I, `Fizrrz VoenLsANm merchant, of Charlottenburg, `near Berlin,

Germany, subject of the- German Emperor,`

residing at Charlottenburg, near Berlin, Germany, have invented certain new and useful Improvements in Safety-Locks, of which the following is a specification.

The present invention relates toa safety lock having three or more radially arranged pin tumblers which by the introduction of the key are displaced insuch a manner that the key cylinder can be rotated forthe pur-` pose of opening the lock. 1

According to the invention the pin tumblers formI various angles between them; whereby` the advantage is afordedthat the introduction of the key in the right place is facilitated and the introduction of the key in the wrong place is revented.

Accordin to afurt er construction of the invention t e pin tumblers are arranged symmetrically with respect to a plane passing through the axis of the lock, the tum blers forming equal angles with the said plane having, also equal dimensions. This construction has the advantage that the lock can be closed from either side with the same key.`

Further features and advantages of the invention will be disclosed by the following specification and claim.

The drawing illustrates two constructional forms of the invention.

Figures 1 to 3 show the lock in section,

front elevation and section on line A-B of Fig. 1.

Figs. 4 and 5 show the key in section and elevation. y

Fig. 6 shows another constructional form of the lock.

The safety lock which is particularly applicable for use on a` door lock, consists broadly of a ring 1 which by means of the screws 2 is secured to the door or the lock already provided thereon. This ring 1 is also provided with the key cylinder or plug 3 rotatably set thereinand with the pin tumblers 8, 9. The cylinder` 3 is in engagement with the mechanism of the doorlock, for instance, by being provided on one side with an arm 4 the cross-head 5 of which is connected, on inserting the safety lock, with the bolt 6 of the door lock in such a manner that on `rotating the key cylinder 3 and therewith i Specication ofLettersIatent. i "Pattintedl D913, 3, 1918,

1 the cross-head 5, `the boltis either` shot in or shot out. `Aszthedoor lock in which the safety lock is inserted, may be of any construction, the bolt 6 of such a lock ismerely indicated by dot and dash lines in Fig. 2. rIhe ringl of the safety lock is preferably flattened on the side on which the bolt 6 bears, as indicated by the line 7.

`The ring 1 and the cylinder 3 are formed withbores `radially arranged in sucha man- `ner that they register in the closed and opened positions (llig.` 1). Inthese bores,` the tumblers consisting of the pins 8, 9 are located under the influence of the springs 2% The bores are so long` that the said pins are guided throughout theirlength (Fig. 1).

The key cylinder 3 is formed with a `pluralityjof slots, which radiate from the center of said cylinder and extend entirely through the same, the arrangement of said slots exactlylcorresponding to that `of the tumblers. These slots are designed `to receive the radiating teeth 16 of the key 15,

\ so as to permit said teeth, on the introduction of the key, to come into contact with the pins 9 and displace the latter outwardly to such an extent that their outer ends are flush with the periphery of the cylinder 3 and their inner ends are located in the cavities or depressions 23 of the teeth 16. The cylinder 3 can now be rotated by means of the key and the door closed thereby.

In the constructional formi illustrated in Figs. l to 5, five tumblers 17 18, 19, 20 and 21 have, by way of example, been provided. Each of these tumblers forms a different angle with the adjacent tumblers so that the key witll the correspondingly formed teeth 16 can only belintroduced in the right position, that is to say in that position in which each of the slots 10, 11, 12, 13 and 14: of the lock cylinder is engaged by that tooth 16 of the key which can set correctly the corre-` sponding pin tumblers 8, 9. In this man- Inthe construction illustrated in Figs. 1to

5, the tumblers 17 and 18 have, for this purpose, the same dimensions and form the same angle with the plane of the axis of the i lock, the tumblers 19, 21 are also symmetric to this plane and have equal dimensions and the tumbler 20 is located with its longitudinal axis in the Said plane.

The dimensions of the tumblers 20 and the tumbler pairs 17-18 and 192l and the angles they form between them, are, however, independent of one another and therefore may be varied as desired, so that notwithstanding the symmetry, a great number of combinations is possible.

In the constructional form illustrated in Fig. 6, there are six tumblers provided, which are arranged symmetrically in pairs with respect to the plane of the axis of the I key.

The tumblers are preferably provided in the central plane of the lock at right angles to the axis of the lock (Fig. 3) so that the introduction of the key from either side is limited by the contact between the key shaft and the lock cylinder in such a manner that the cavities 23 formed in the teeth of the key are exactly opposite the tumblers. The teeth 16 of the key need then only one cavf' ity or depression 23 per tooth so that the lock can be opened or closed from either side by means of a key having a single set of teeth. l

Having now particularly described and Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents.

ascertained the nature of my said invention and in what manner the Same is to be performed, I declare that what I claim is:

A lock, Comprising, in combination, a casing; a cylinder rotatable in said casing and having both a plurality of radiating key slots extending completely therethrough, and a plurality of radiating tumbler recesses eX- actly corresponding in their arrangement to the key slots and opening into the latter at their inner ends; pin tumblers operative in said recesses; and a key having a plurality of radiating teeth at one end of its stem for insertion through said slots, to operatively engage all of said tumblers simultaneously; all of the recesses being disposed in solely a single plane which is located approximately midway between the ends of the cylinder, and the related tumblers and slots being disposed symmetrically at opposite sides of a plane passing through the axis of the cylinder, so as to permit the introduction of the key teeth through either end of the slots. In testimony whereof I have aiixed my signature in presence of two witnesses.

FRITZ VOGELSANG. Vitnesses:

ROBERT Miei-IELSKI, HENRY HASPER.

Washington, D. C.

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