US227327A - Schwitz - Google Patents

Description

R. voLL-s-GHWITZ.

Look.

Patented May 4, 1880.

, w w G AW Ny PETERS, PHoTn-LITMOGRAPMER, WASHINGTON, u u.

UNTTE STATES PATENT OFFICE.

RUDOLPH VOLLSGHWITZ, OF ELIZABETH, NEW JERSEY.

LOCK.

SPECIFICATION forming part of Letters Patent No. 227,327, dated May 4, 1880.

Application led September 8, 1879.

To all whom it 'may concern:

Be it known that I, RUDOLPH VOLL- SCHWI'IZ, of Elizabeth, in the county of Union and State of New Jersey, have invented anew and useful Improvement in Locks, which improvement is fully set forth in the following specification, reference being had to the accompanying drawings, in which- Figure l represents a top view of my lock. Fig. 2 is a longitudinal section thereof, showing the tumbler. Fig. 3 is a similar section, showing the bolt-operating device. Fig. 4 is a cross-section in the plane of the line x m, Fig. 3.

Similar letters indicate corresponding parts.

' My invention is especially adapted to locks Jfor pianos, sewing-machine cases, &c.; and it consists in the combination of a toothed bolt constructed to embrace and slide upon a hat guide-plate, a spiral head which is swiveled on the outer end of the bolt and iitted into a slot in the lock-case, so that when the bolt is shot or retracted the spiral head turns, and thus is adapt-ed to engage and disengage a slotted plate aflixed to the article to be locked, a' toothed diskv arranged in a recess in the before-mentioned iiat guide-plate, which disk meshes with the teeth oi the bolt and is adapted to receive the key for rotating the same, and a spring-tumbler acting on the bolt, so that when the key is inserted in the lock and turned the tumbler is displaced, thereby releasing the bolt, and the latter is sliot or retracted by the action of the toothed disk turning with the key, all of which will be fully hereinafter described in detail.

In the drawings, the letter A designates the lock-case, consisting of a cylindrical body and a face-plate at one end oi' such body. B is the bolt, having teeth a; G, a spiral head swiveled on the outer end of the bolt, as at b, and itted into a slot, c, in the face-plate of the lock-case. D is the toothed disk, having a central slot, d, to receive a key, marked E. F is the tumbler acting on the bolt, and G the boltguide. rIhis bolt-guide Gis substantially hat, and the bolt B is fitted thereon as shown in Fig. 4.

The teeth a of the bolt are formed by perforatiug the same at an appropriate point, the part between each perforation constituting a tooth.

In the bolt-guide G is a recess, e, in which the toothed disk D is tted, and this disk is of such a diameter that the same meshes with the teeth of the bolt from an inner direction, as shown in Fig. 3.

The tumbler F consists ofa wire spring,-

which is coiled on a pin, f, whereby the boltguide Gr is secured in the lock-case, and one arm of which engages a stump, h, projecting from the bolt, the other arm thereofl being also allowed to bear on this stump.

To adapt the spring-tumbler F to engage the stump h of the bolt, the tumbler is provided With an oset, i, catching over or under the stump, as the case may be; but this can also be accomplished in other Ways, as by piercing the stump and bending the tumbler so as to enter the hole.

As the bolt B is shot or retracted the spiral head C is caused to turn on its axis by its contact with the edge of the slot c, and hence this head is adapted to engage and disengage a slotted plate, substantially similar to the face-plate of the lock-case, affixed to the part or article to be locked.

For the purpose of impelling the bolt B the key E is inserted through a hole, j, in the lock-case, when the key passes between the two arms of the tumbler F into the slot of the toothed disk D. The key is then turned, when the tumbler F is displaced, so as to release the bolt B, and after this is accomplished the bolt is moved in or out, as the case may be, by the action of the toothed disk D, which partakes of the motion of the key.

It will be seen that by the peculiar arrangement of the bolt B and the toothed disk D the lock is brought within a very small compass.

What I claim as new, and desire to secure by Letters Patent, is

The combination oi' the lock-case, the iiat bolt-guide Gr, having a recess, c, and the toothed disk D, arranged in said recess and having an opening for the passage of a key, with the bolt B, embracing the guide-plate and adapted to slide thereon, and provided In testimony that I claim the foregoing I with a series of teeth, a, and a projection or have hereunto set my hand and seal this 23d 1o stump, h, the spiral head C, swiveled on the day of August, 1879.

end of the bolt end fitted in a slot in the lock- 5 ease,.and the spring-tumbler F, composed of RUDOLPH VOLISCHWTZ' [L' S'] two arms, which bear upon the projection or Witnesses: stump on the bolt, all substantially as and for W. HAUFF, the purposes set forth. E. F. KASTENHUBER.

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