US127870A - Improvement in reversible latches - Google Patents

Description

JOHN HAMILL.

vImprovement in Reversihrl'e--Latc'hes-I JOHN IIAMILL, 0F ALLEGHENY, PENNSYLVANIA.

Specication forming part of Letters Patent No. 127,870, dated June 11, 1872.

SPECIFICATION.

To all whom it may concern: y

Be it known that I, JOHN HAMILL, of Allegheny City, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Reversible Locks 5 and I do hereby declare the following to be a full, clear, and exact description thereof reference beinghad to the accompanying drawing forming part of this specilication, in which- Figure l is a perspective view of a door-lock embodying my improvement. Fig. 2 is a like view of the same, and illustrates the manner in which the latch is reversed; and Fig. 3 is a detached view of a portion thereof.

Like letters of reference indicate like parts in each. y

My invention consists in the combination of a removable block with the hub-arm of a lock and a lug on the end of the yoke-arm, whereby the latch may be reversed without removing the cover-plate of the lock.

To enable others skilled in the art to make and use my invention, I will describe its con-' struction and mode of operation.

The lock A with its latch a, yoke b, hub c, and spring d are of an ordinary construction, except that the lower arm b1 of the yoke b is longer than the upper one, b2. The space between the lower arm o of the hub c and the lug e on the end of the long arm b1 of the yoke is filled by a block, t', which is carried on the end of the angle-shaped piece f. The latch a is secured in the journal a2, in which it may be turned with ease when the square head is drawn forward of the square opening al. The piece f is sustained by the spring g, which, when the piece is in position, holds the square edge g2 against the top side A1 of the look. The upper end j of the piecef projects upward through the slot h. The function of the piece fis to afford a means of operating the blockz' so as to throw it in and out of position without removing the cover of the lock. Just below the block t' is an Lshaped catch or stop,

k, which is intended to receive and hold the block t' when thrown down out oi' position. If the projection f is pressed down it forces the block z' down past the lug e onto the stop la.

'Then the yoke b may be drawn forward, by

means of the square head of the latch a, until the lug e on the end of the arm b1 encounters the hubvarm c', which distance is sufcient to allow the latch-head to be drawn through the square opening al in the front side A2, as shown in Fig. 2, and be reversed in the usual manner.

If it is desired to restore the parts to their operative position, as shown in Fig. 1, the latch a is pressed back until the lug e on the arm b1 is pushed past the block t', which is now resting on the stop k, as shown in Fig. 2. As soon as the lug e slips past the block t' the spring g, pressing against the piece f, forces the block i up into position between the lug e and arm c of the hub. The parts are then in position and may be operated.

Instead of the angle-shaped piece f, alu g projecting from the block i through a slot in the face of the lock may be used for throwing the block t' in and out of position. In such case the spring g and slot h would be dispensed with. Thus it willbe seen that the block ,when in position, affords a bearing for the arm b1, but may be thrown out of position with ease and quickness, and thereby permit the latch to be drawn forward and reversed without removing the cover of the lock.

What I claim as my invention, and desire to secure by Letters Patent, is-

The block i, interposed between and in combination with the arm c and the lug e, substantiallyas and for the purpose set forth.

In testimony whereof I, the said JOHN HAM- ILL, have hereunto set my hand.

JOHN HAMILL.

Witnesses:

A. S. NICHOLSON, THOS. B. KEER.

ATEN'I OFFICE.

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