US70576A - Michael knapp and john knapp - Google Patents

Description

@nitro tatrs @anni @frn MieHAEL KNAPP AND JOHN KNAPP, or HUDSON orrv, 'New JERSEY.

d unlocked.

vLetters Patent No. 70,576, dated November v5, 1867.

IMPROVEMENT IN DOOR-(LOCKS.

TO ALL WHOM IT MAY CONCERN: Y

Be it known that we, MICHAEL KNAPP and JOHN K NAPP, of Hudson City, in the county of Hudsomand State of New Jersey, 'have invented a new and improved Door-Lock; and we do hereby declare that thc fol-v lowing is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 represents a. Side view of our improved lock, the front-plate being removed, and the bolt being Figure 2 is a similarview, showing the bolt vin the locked position.

Figure 3 is a vertical :cross-section of thesamc, the planeof section being indicated' by the line a: fr, iig. 2.

Figure 4' is an end view'of the key. Y

Similar letters of reference indicate like parts. l

This invention relates to a. door-lock, in which'compound tumblers'are used, the main tumbler being locked by an auxiliary tumbler whenever the door is locked, while, when unlocked, the bolt'is perfectly free, and can be moved'dire'ctly by the key. The parts are so arranged that the key can only bel turned in one direction, both for locking and unlocking. By the application ofthe auxiliary tumbler the bolt is held firm when locked, -and cannot be moved back by pressing from the outside, which is the casein most spring-bolt locks.

A represents thecase of the loci( B is the bolt, to the tail end of which a spiral spring, a, is secured, which has the tendency to draw the bolt in; C is a bar, which is arranged parallel with the bolt B, and which has two tumblers, b bfwhich' project at right angles from its ends towards the bolt B. A spring, c, prcsses the ends of the tumblers b b against the bolt B. These tumblersrb are guided between lugs d d, which are stationery-*arranged in the case A, as shown. The key-hole is in the square or oblong space formed between the oolt Band the bar C. When the key is inserted through the key-hole, and turned in the direction of the arrow lin iig. lfgits' end will' (the bolt B being unlocked) strike against a lug or shoulder, e, formed on the bolt, "and will move th'c same forward into the position shown in iig. 2. As soon as two reccsscs,ff, n the bolt B, como opposite' to the ends of the tumblers b b, the latter will be thrown into these recesses bythe spring c, and wiltl thus lock the bolt B while the latter locks the door. For unlocking, the key is turned in the samedireetion as for locking, and comcsin'eontact with the har C, and throws it back against the spring c; thereby the tumblers 1 Z are withdrawn from the rccesscsfand the bolt B is again released, Vwhen the spring a will draw it in again, and the door will be unlocked. All those movements are very simple, and such a lock can be opened by anyu key, the bit of which is sufficiently long. To make it more diliicultto open, one or more secondary tumhlers D may be arranged above the bar C, in the manner shown. 'lhcse secondary tumblers t through arecess in the upper part ofthe tumblersb and guides d, as shown. The recesses in the latter are broader 'than that portion of theseconda'ry tumbler that passes through them, so as to allow themotion of the arm C. That portion of the secondary tumbler which is in the tumblcrs B when Vthe bolt B is unlocked, is broader than the other parts,as shown in igs. 1 and 2. A shoulder, g, is formed on cach end of cach secondary tumbler D,l,and a spring, 1t,- has the tendency to draw the secondary tumblers towards theouter side of the lock. When the bolt B is unlocked, the

secondary tumblcrs lie in the position shown in g. 1, and cannot be moved longitudinally, as the broader parte in the tumblers tit between the guides cZ. While the bolt is being locked, the secondary tumblers are carried towards the bolt B by the tumblers b until their broad portions come in line with the recesses in the guides d. The spring t then draws thc secondary tumblers forwardin the same direction in which the bolt is moved, so that their broad portions are drawn into the recess which is formed in the guides d. The shoulder g, at the tail endvof the secondary tumbler, prevents the same from being drawn by thespring t further than is shown in iig. 2. The broad parts of the secondary tumblers will thus be in the recesses in and d at- 'the same time, as shown, and wiil thus completely lock the tumblers b, preventing them from being withdrawn from the bolt'B'. Not until the broad portions of the secondary tumblers are withdrawn from the recesses in d will the key have power to withdraw thetn'mblers b from the bolt B, and thereby unlock the latter. It will be seen that the motion` to be imparted to the secondary tumblers by the key is at right angles to that of the tumblers b, and consequently the key must be so constructed that it will move the one in the direction ofthe arrow 2, and the other in that of the arrow 3. For thispurpose we have provided the bit Eef the key with lugs j, whichv project from itssides, as shown in tig. 4. These lugs t into recesses or against shoulders in the secondary tumblers,

and draw the same in direction of the arrow 2. Then the key will be able to push the tumblers b out oi' the bolt B.

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

1. 4Guiding the secondary tumbler D through the slotted guides d and through the grooved tumblers I Z1, said secondary tumbler provided with the projections g, as described, and connected with the spring h, operating asnnd for the purpose specified.

2. The combination and arrangement of the bolt B, tumhl'ers b 1),"secondary tumblers D guides LI, :and

springs a c z, all operating as described, for the purpose specified.A i

3. So cons tructinga. lock that the same can only be locked and unlocked by turning thc key in one dil-cetion only, as set forth,

MICHAEL KNAPP, Y JOHN KNAPP.

Witnesses:

JOHN LEITZ, DANIEL KLENEM.

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