US295961A - Max voigt - Google Patents

Description

(Model.)

`lVI. VOIGT.

LocK.

iPatented Apr. 1, 1884.',

1 m "mum f UNITED Starts Artnr Finca.

MAX VOIGT, OF NFV YORK, N. Y., ASSIGNOR OF ONE-HALF TO ROBERTG.

` SCHMIDT, OFSAME PLACE.

LOCK.

SPECIFICATION" forming part of Letters Patent No. 295,961, dated April 1, 1884.

` Application filed February f2, 184. (Model.) i

.To @ZZ whom t may conoernl g Beit known that I, MAX Vorenof New York, in the county and State of New York,

y, of the same.

l. IO

have invented a new and Improved Lock for Doors, Drawers, and the like, of which the following is a specification.

Figure l is a sectional face view of my iinprovedlock, showing the interior arrangement Fig. 2 is crossLsection of the same, taken on the line c o, Fig. 1. Fig. 3 is a face view ofthe lock. Figs. 4 and 5 are side views, partly in section, of keys that are inserted in said lock. Fig. 6 is a face view, partly in section, of a modified construction of said lock; and Fig. 7, a top view, partly in section, of the same.

This invention relates to door and drawer locks, and has for its object to so construct the lock that ifa key tting it shouldpa-s's into the hands of unauthorized persons the lock can at once be changed to make that key useless and iitted for an entirely different key.

The invention consists in combining with a lock a movable plate, that has projections for guiding the bit of the key to the tumblers, the

\ set of projections for one key being different from the set for other keys with which the same look may be opened, all as hereinafter described.

llhe invention also consists in combining with said movable plate means for holding it in any one of several positions, as hereinafter more fully specified.

In Figs. l to 5, inclusive, my invention is shown applied toadrawer-lock, or any lock, in faot,vwhich has but one key-hole. In these figures, the letter A represents the frame o1" the lock or its case. B is the bolt, and C the tumbler, of which a suitable number may be used. a is the key-hole, and D the key. b is the bit of the key. A

In the look-case is shown a pivoted plate, F., with notches or apertures cl at or near its edge, into one of which notches enters a spring-bolt, e, of which the handle f extends through the side of the lock-case A, as in Fig. 3. The axle or pin g of the plate E also eX- tends through the look-oase, and has a button or handle, h, at its outer end, as indicated in Figs. 9, 3, 4, and 5.

On the inner1 face of the plate E, within the lock-case, are series of projectionsz', placed (in this form oflock) radially onto the i'ace of the disk, as shown in Fig. l. Vhen the key is introduced in this lock through the keyhole a, as in Fig. 2, its bit bwill be inline with one `set of projections t' on the plate E as in Fig. 2, and the key can only be turned so that it may reach the tumblers, and, finally, the bolt B, if it can pass the projection z', which` faces it. In order to do this the said projection i must iit the form of the bit, as in Fig. 2. Now, if the key D, which is shown in Fig. 27 should be lost or pass into unauthorized hands, or if any danger of such a disposition of the key should exist, the owner of the lock will only have to move the bolt e out of the notch of the plate E, and then turn said plate E so as to bring another of its projections linto the path of the key, and then refastenthe plate E by the bolt e in the new position. The new projection thus placed in the path of the key will not enable the iirst key which was lost to open the lock, but will now require an entirely different key. Thus Fig. 5 shows the plate E so turned as to bring the projection z', which was lowerrnost in Fig. 2, to the top into the path of the key.

In selling these locks I propose to furnish with each a key or set of keys for every position of the plate E. The owner can iirst use one key or set of keys, and then,when occasion arrives for requiring a change, set the lock so as to render that first key useless, and use the next key or set of keys, and so forth.

Although I have shown in Fig. l the plate E tombe provided with four suchprojections i, it may be provided with more or less4 than four such projections, and with a corresponding number of notches or apertures d., The button h, by whichthe disk E can be turned, may be made detachable,so that the owner can keep it with the spare keys, and afl-lx it to the pivot or aXle g of the plate E only when occasion requires, so that unauthorized persons cannot tamper with the lock. In like manner the button f of the bolt e may be made detachable.

When the lock is made with two key-holes, one on eachside, for useon an ordinary room door, the plate E, instead of carrying the IOO notched projections 't' on its face, will carry them radially on its pivot or axle g, as shown in Figs. 6 and 7, the difference between the projections shown in the last-mentioned iigures and those shown in Fig. 2 being that for the lock having the two keyholes the projections i must have their recesses at the ends, While in the lock having but one key-hole they may have these projections on the face, as appears from a comparison of Figs. 2 and 7 5 but ,I in every lother respect the lock Will operate in either case in the saine manner.

I claim- Y l. In a lock, the combination of its case,

tumblers, and bolt With the movable plate E, having series of projections i i, by which the lock, upon moving said plate, can be iitted for specified. Y

MAX VOIGT. Witnesses:

GUsTAv SCHNEPPE, WILLY G. E. SoHULTz.

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