US111499A - Improvement in door-locks - Google Patents

Description

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JOHN WELSH, OF CANTONHIO.

Letters `Patent No. 111,49'9, dated January 31, 1871.-

MPROVEMENT IN DOOR-LOCKS.

Thesehedule referred to in these Letters Patent and making pari: of the same.

To all whom it muy concern:

Beit known that I, JOHN XVELSH, of Canton, Stark county, Ohio, have invented certain Improvements in Locks; and that the following is a full, clear, and exact speciiication thereof.

N `ture a1z.ll.0 bjccts of myv Invention. I My invention relates to the combination, with a door or drawer-lock, of' a long-knobbed spindle, having the hole for the key formed in the axis thereof, and pro-` vided with a divided knob for the concealment of said key-hole, by which the thief 'or burglar is delayed in tfinding the key-hole of Athe lock in thetirst instance,

and is kept at such a distance from the lock-tumbler mechanism, even after he has discovered the key-hole,

iug a section through the slotted portion of the same.

General Description.

A is the lock-case;

B is the covering plate, which is secured to the case A by a screw, l)

C is the lock-bolt;

F is the tumber; and

J.is the knobbed spindle. v

The spindle J is of a cylindrical form, and has onehalf, E, of the outer knob D E, cast with it,- as shown, and through the axis of this spindle is cnt the keyhole e, of a form depending on thekind of key used.

flhe outer'half, D, of the knob D E, is connected by a pivot-pin or rivet,'cl, with the inner half E, so that it can be turned around said pin as an axis, asshown in figs. 1, 4, and, inorder to give access to'tlie keyhole e.

lo keep thehaltv D locked down ou the halfA E the sliding pin i is arranged in a hole in thepart E, with its notched rear end projecting from the back of the half E, as shown in 4, and a spiral spring, j, is arranged in the half E around this pin i, for the purpose of keeping its front end pressed out toward the halt' D, as is also shown in iig. 4.

'lhe hole 'm is formed on the inner face of the half D in such a position as that when the pin i is drawn back by means of its notched rear end, and the half D is turned down over the halt' E, the spring j will shoot the pin i into the hole m, thus locking the halt` D on the half- E, as is readily seen.`

lhe inner halt' L of the inside knob L M is made separate from the lspindle J, in order to allow of the introduction of the spindle into the hole l provided for it in the loclecase. It is screwed onto the threaded end N of the spindle J, as shown in iig. 4, and the half M is secured to it by the'pin or'rivetd, as before described in connection with the outside knob D E.

A modifiedformof device for locking the half` M on the halt` L is represented in jig. 4, in which P is a sliding pin, arranged in a hole in the halt M, which is forced out by a small'spiral spring, t, placed in the hole behind it. l

The sliding rod 0 is arrangedvin ahole in the half L directly opposite the pin P in the half M, and its head is made Hush with the back of the half L, the hole for the said head being conntersunk sufficiently to allow the rod. to be pressed back a short distance.

The pins fr and s are inserted in the halves M and L, and tit in slots formed in the sides of' the pin I and rod O, by which the-end movement of said parts are limited as required.

It is readily seen that when the half M is turned down over the half L, the spring t will shoot the pin P into the hole for the rod O, and thus lock the halt' M, but by pressing on the head of therod O it can be forced back suflciently to push the Apin P out oi the half L, thusunlocking the half M.

The bolt Chas the slot h out in its rear end, to allow it 'to set over the stop H, which is held by the screw U to the case A, said screw being arranged in the slot or hole R in said case.

The tumbler F (or two or more tumblers, itfound desirable) is pivoted on the pin c in the boltG, and the notches j' Aand y are out at tire top of the large square slot win the rear end of the said tumbler, and are so arranged as to drop over a projection on the stop H so as to lock the bolt C at either end of its movement, as is readily seen.

ljhe spring I is fixed in the tumbler F, and presses against the ltop of the case A, thus serving to force the tumbler down on the projection on the stop H, and the notch lis cut inthe bottoml of the bolt() to allow the bit of the key to raise the tumblers and to throw the bolt. l

tlhe slot K is cut in the spindle J, and said spindle is c ut out in a semicircular form under said slot to allow of the rotation of the bit of the key.

The spindle J its in the hole T in the case A and covering plate B, and the wings-'a u on the spindle fitin the notches k It at the sides ofthe hole '.l, thus preventing any rotation of said spindle.

In order to insert the spindle J the end of the bolt C is raised' by means of the screw U in thestop H until the end of the bolt is cleared from the hole .L.' The spindle J is t-hen inserted and the screw U is liberated, when the spring I forces down the tumbler F,

stop H, and bolt C, thus forcing said bolt into the slot K and locking thebolt in the case.

The spindle J is shouldered at g'/ to fit against the plate B, and the rear face of the -bolt Odrops down close to the face x of the slot K, so that the spindle is held rxnly. p

For further security, as well as for appearance, a ring, n, can be secured on the spindle J close up tothe case A.

The sides of the hole R have a lip formed around their lower edge, so that a small piece of metal ofthe exact size ofthe hole can be placed in saidhole, where it can be secured by screwing down the screw U, thus preventing the end of the bolt from being forced down to liberate the spindle.

From this description it is seen that on approaching the door or drawer nothing is visible except what appears to be a solid knob; nor is there anything to indicate the division of' the knob, as the locking devices 'i or o are both concealed on the under side-of the knob.

,If, however, the division ot' the knob is discovered, and the key-hole exposed to View, the distance from the end of the spindle to the tumbers is such that it would be very dicult to pick the lock.

Where the spindle is applied to a drawer-lock, theinner end of the spindle and the inner knob L M can he omitted.

Although the spindle herein shown has been described as being held from rotating by the wings 'u u, it is evident that this is not a necessary 'Feature ofthel construction. l

rlhe wings u u could be omitted so as to allow ot' a partial rotation ofthe spindle, so that by combining cam-shaped arms with the spindle it could be made tov operate a common spring-latch l)olt, arranged in the lock-case above or below the bolt in the ordinaryY manner. f

The two parts of the spindle knobs have' been described 'and represented as halves, but it is evident that the knob need not necessarily be divided through the center, although I consider this as the better plan.

As evidence of the foregoing witness my hand this 26th day of November, A. D. 1870.

NVitnesses: JOHN \VELSH.

MICHAEL WALSH, ANDREW GHOFFIN.

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