USRE3909E - elwell - Google Patents

Description

c aurea smic garant (twine.

'THE NORWALK LOGKICOMPAN-Y, OE soU'rH NORWALK, OONNEGTLOUT,

ASSIGNEES'OFHENBY YH. ELWELL, r

Letter: lPa-tentNo. 39,280, dated July 21, 1863; reissue "o, 3,909, dated April 5, 1.870,

IMPROVEMENT IN' REVERSIBLE .KNOB-LATCHES.

The Schedle referred to in than Letters Patent and making part o! the same.

To. all whom it may concern Be it vknown that HENRY H. ELWELL, ofSouth Norwalk, in the county of Fairfield and State of Connecticut, did invent a new Improvement in Locks; and we do hereby declare the following, when taken .in connection with the accompanying drawings and the letters of referencev marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent in- Figure l, au internal View of a lock with this improvement applied to it;

l Figure 2, an external view of the same; and in Figure 3, a horizontal section of the same, taken in r the line :t x, lig. 1.

This invent-ion relates to anv improvement in that class of locks which is providedvritlr reversible latchbolts, to enable them to be applied to either a right or left-hand. door; and

The invention consists in connecting the inner end .of the latch-*bolt to the lever, through which, by means of the hub, the latchbolt is actuated by a pin on the lever, and a corresponding perforation in the latchbolt, so that-thc latch-bolt may be easily detached or removed from the lever, and secured in position by a movable bearing within the case, to prevent the accidental removal of the latch-bolt from the lever, and yet so that the latch-bolt may be detached from the lever, removed from the case, and replaced in either a right or left-hand position.

A represents the oase ofthe lock, which may be of the usual rectangular form. B, the bolt, which is operated by a key, as usual.

C is the latch-bolt, which has its outer end beveled at one side in the ordinary way, as shown at a, fig. 3.(

D is the hub, which'is ittediu the case A, and has two arms, l1 b, projecting from'it.

The hub D also has a square opening, c, made through it, to receive the kuob-spindle.

E is a lever, which has its fulcrum at d, and its upper end bearing against a spring', e.

Thus far the mechanism of the lock is of common construction. To make this class of latches reversible, the lower end of the lever E has a pin, f, projecting from it; and onthis pinth'e inner end of the latch-bolt 'C is fitted, the pin y f serving to connect the latch-bolt'to the lever, so that the former may be operated or drawn within the case A by turning the knob-spindle, as usual.

To secure the latch-bolt onto the lever, a bearing is formed, which shall so bear against the latch-bolt as to prevent its accidental removal, and yet so that the said bearing may be removed, to permit the removal of the bolt for adjustment; and this'is done bymeans 0f a slide,

set forth.

F, which is'oi; fork-torni, and'fitted ou a. guide, G, Within the case A.

This slide is placed in such relation-with the latch- .bolt that it maybe moved over the latch-bolt, as shown in black, fig. 1, and serve to retain the latter' in proper position as itis Worked out and in, the bearing also capable of being moved upward, as shown in broken lines, iig. 1, so .as to be free from the latch-bolt, and

'withdrawn from the case, if necessary, in order to re-` verse the bevel a.

If the inner part of thelatch-bolt C be suiciently narrow, it may beturnedfwithout being withdrawn from the case A.

The bearing I? may be held up by the'operator with one hand, while'the other turns the latch, and the lbearing will fall by its own gravity when the hand or finger is withdrawn from it.

The bearing is raised by having a projection, g, attached to it, which is fitted in a slot, h, in the side of the case A,- as shown in'g. 2, the projection being notched, to receive the nail of the th 2mb or any suitable implement.

. The bearing may have a'spring behind it, if necessary, in order to prevent it from moving too freely.

We are aware that reversible latch-bolts have been arranged by having their inner ends attached to the lower end of the lever E by means of a screww ich requires to be unscrewed in order to release'the la chbolt.

connection-ibi' the latch-bolt, and, iu reversing the latter, no screw nor any other part req/nires to be -removed, the bearing iF being sim ply raised above the latch-bolt, as described.

It will be observed that the object of the slide is simply to hold the bolt in place, and it is believed to be the best method of so doing.

-We claim as' the invention of the said HENRY H. ELWELL- The'arrangement of the bolt C, attached to the le# ver E by a fixed pin, f,'and combined with a movable bearing within the case, whereby the bolt may be secured to or detached from the lever, substantially a5 'NORWALK LOOK oo.

E. BEARD,'Secretm-y.

This is a troublesome operation, and the 'screwis liable to'be lost; besides, the bolt is liable to work loose on the screw, and the screw also liable to work. loose in the lever. fn' In this improvement, the piuf forms a durable

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