US28710A - Linus yale - Google Patents

Description

LINUS YALE, JR., OF PHILADELPHIA, PENNSYLVANIA.

LOCK.

Specification of Letters Patent 1 \To. 28,710, dated June 12, 1860.

To all whom it may concern:

Be it known that I, LINUS YALE, J r., of the'city and county of Philadelphia, in the StateY of Pennsylvania, have invented a new and Improved' Method of Constructing Locks for Bank Safes, Vaults, &c.; and I do hereby declare the following to be a full and exact description of the same, reference being had to the drawings annexed to and making part of this specification.

Figure 1 is a plan view of lock with the cover removed showing the working part-s.

By lifting the loose leaf of the drawing the tumblers and other parts of the lock on a lower plane are shown. Fig. 2 is a vertical section of the same through the line Z Z, with the co-ver in place and the key inserted in' the key hole. Fig. 3 is a horizontal section of the same through the line Y Y but the key is lnot represented in this section. Fig. 4 is a pla-n of the key handle and pod case. Fig. 5 is a sect-ion of the same showing the swivel S of the pod case M. Fig. 6 is the. pod of key bits separated from its case. Fig. 7 is a part of the draw down platev G, reversed to show talon slot g, and crank pin i of wheel I also the limb g which locks into the notches of the bolt. Fig. 8 is a plan of that part of the bolt B which has thev lugs b bf for steadying the secondary tumblers; and also the notches b b for the limb g to engage in to hold it in position while the key hole is open.

The same letters in all the different figures indicate the same parts.

A A is the casek or bar of the lock pierced as usual at the corners for screws to secure it to the door. It also has a projection a a which is grooved at E E, more particularly described hereafter and serves as a chamber in which the primary tumblers or sliders work, also hereafter described.

B, B, is 'the main bolt of the lock ,which is provided with lugs b Z1 to hold t-he secondary tumblers, and also with the notches b b in its upper edge into which the limb g of the draw down plate G engages, to hold it either in the locked or unlocked position. This engagement is particularly shown by dotted lines at g in Fig. 2.

C, C, are the primary or key tumblers against which, on the point-s c c, the key bits act to adjust them to their required position, and so formed as to embrace (while in the unlocked position) the tongues of the second* ary tumblers, thereby carrying them intheir movements Yto whatever position they are made to assume by the key.

D, D, are the secondary tumblers, sometimes called fence tumblers, which ride horizontally with the bolt B, and in the recess of which they move vertically (when the lock is in position on the door of a vault) to correspond with the vertical movement of the primary tumblers. They are also each provided with eight or more notches (1, 2, 3, 4, 5, 6, 7, S) which by hooking on to the fence knife N register the form of the key bits used in locking, since' the notches are cut to correspond to the varied lengths of the key bits.

E E is a grooved channel in the projection a a of the case, in the which, lie the ends of vthe tumblers C, the driver F, (hereinafter described) and is the channel in which moves the key pod inits action on the tumblers. An enlargement in it forms the chamber for the key where the case M (hereinafter described) lies while the driver F displaces the Jod. i

l F F is a hardened driver or punch which traverses through the key chamber bymeans .of its attachment to the draw-down plate G (to be described) and by so traversing no-t only takes the pod out of the key, but following the same closes up the passage through whichy it has pushed it, thereby perfectly cutting off all acess to the tumblers through the key hole at any time when the bolt B' can be made to move, thus preventing picking by the tentative process.

Gr Gr is a draw-down plate moved vertically by the crank pin z' on the wheel I working in the talon slot gv. This plate answers three purposes rst, it restores by means of its limb g all the tumblers to their normal position; secondly, itholds the bolt B in position either locked or unlocked by means of the same limb g working into the notches 2) b respectively whenever the key channel is in the least degree open, or whenever the tumblers can be reached or felt by any tool or instrument from the outside; thirdly, it projects the driver F through and across the key chamber P to displace the key pod of bits.

H is the bolt talo-n plate by means of which the bolt is moved either back or forth by the crank pin z'.

I is a gear wheel with a crank pin z', with which it moves vertically the draw-down plate, and horizontally the bolt talon plate, and through that the main bolt B.

K is the key wheel which driven by the key handle in turn drives the gear wheel I, and through it thel draw-down plate G and the bolt B. This wheel is pierced through its center with a hole the shape of the key and is also so formed as to maintain its position by means of a hole in the cover which it fits as at 7c, and it may also be provided with a milled head K or other suitable device by which the lock may be turned instead of using the key handle.

Figs. 4l and 5, is the key handle perforated for the swivel pin s of the pod M.

M is the pod case attached by a swivel pin s to the handle. This pod case fills the key chamber and remains stationary while the handle revolves, to move the other works through the means of the key wheel, &c. It is in turn illed with the pod of bits Fig. 6 which it holds in position while in the lock, ready for the driver F to displace by moving it perpendicularly up through it.

N is a fence knife attached immovably to the case, and on to which th'e secondary tumblers are anchored by means of their notches when the bolt B moves forward to its locked position.

O O are brass furring which serve to isolate the sliders or tumblers, so that they shall not influence each other in moving.

Operation: Insert the key and turn to the right, and the key wheel K gearing into the wheel I revolves it to the left, and its crank pin z' working into the talon slot of the draw-down plate G elevates it to its full height, thereby releasing the bolt, which was until now, held by the limb g', and also carries the driver F, up through the key pod case thereby pushing the pod of bits out of it, and against the ends c, of the primary tumblers C, elevating each of them severally to heights due to the varied lengths of the key bits and of course the secondary or fence tumblers are carried by the primary or key tumblers to exactly the same height. Now the crank pin 1l takes into the talon plate of the bolt and carries it forward to its locked position where the secondary tumblers are hung on to the knife N by the notches corresponding to the height at which the key elevates them. The continued movement of the crank pin now brings it into action on the draw-down plate G which it restores to its former position, bringing down with it the tumblers C to their normal position, and also locking into the bolt B by the limb g on the upper end. The downward movement of the primary tumblers also forces the key pod down into the case, when of course the same movement withdraws the driver F from the pod ease, and releases the key so that it is easily withdrawn. On reversing the motion after again inserting the key the wheels rotate in the reverse way and elevate the draw-down plate as before, but take into the bolt talonplate at the opposite side of the talon, moving the bolt in the-opposite or unlocking direction, after which, the draw-down plate carries down the key tumblers, and by and through them, also the fence or secondary tumblers,.leaving them in their normal position ready to be acted on by any new form of key which may be applied.

Of course the key wheel being so constructed as to project through the door may be turned directly by the hand without the key handle; or indeed the gear wheel I may be so arranged as to be turned directly by the hand rendering thereby the use of the key wheel K entirely unnecessary; but I prefer using the handle of the key in the way designated as more convenient and eX- posing less of the lock on the outside of the door.

The other parts having been used before by myself and others, I only claim as new and of my invention, and desire to secure by Letters Patent- The pieces M and F when used in the manner or an equivalent manner and for the purpose substantially as described.

LINUS YALE, JR.

Witnesses JOHN HosKIN, C. O. YALE.

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