US159486A - Improvement in door-knob fastenings - Google Patents

Description

NrrED STATES Enron.'

JEROME B WELLS, OF ROCHESTER, NEW YORK.

IMPROVEMENT IN DOOR-KNOB FASTENINGS.

Specieation forming part of Letters Patent No. 159,486, dated February 2, 1875; application led r November 28, 1874.

To all whom it may concern:

Beit known that I, JEROME B. WELLs, of the city of Rochester, in the county of Monroe and State of New York, have invented a certain new and useful Improvement in Door- Knob Fastenings; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawings, in which- Figure l is a central vertical section of a door-knob, showing my improvement applied to a door. Fig. 2 is a perspective view of the lock and fastening detached. Fig. 3 is a crosssection ofthe knob-shank and spindle.

My'improvement relates to fastenings for door-knobs, to prevent the withdrawal of the lock-bolt from its keeper by the turning ofthe knob, thereby avoiding the necessity of a separate lock and key, 0r an outside bolt. rIhe invention consists in the combination, with the knob-shank, lock-case, and cam, of a sliding bolt, which tits in a longitudinal groove cut in the shank, and is provided with a flat bit, which strikes into a notch or sloteut halt' vin the lock-case and half in the operatingcam, for preventing the turning of the cam, all as hereinafter described.

In the drawings, A represents a door. B B are the knobs. C C are the knob-Shanks. Dis the spindle. E is the lock-case. F is the cam, and G is the catch or bolt of an ordinary door-knob. One of the knobshanks C is provided -with a longitudinal slot or groove, ct, cut in its periphery, in Which fits a bolt, H, so as to slide forward or back. I prefer to make the slot and bolt dovetailed in cross-section, as shown in Fig. 3, so that the bolt will it closely, and will not fall out, while it has a free movement; and so, also, that, on the outside, the bolt will t iiush with the surface of the shank, and present as narrow a joint as possible. 'The outer end of the bolt has a thumb-piece, b, turned up at right angles, so as to be easily seized by the fingers. The inner end is provided with a flat bit, c, and also with a projecting point, d. The lockcase E and cam F have a narrow slot, f, formed half in each. This slot is coincident with the bolt H, and of such size as to admit the easy entrance of the bit c. When the bolt H is pushed inward the bit c strikes into the slot f, and, holding half in the lock-case and halt in the cam, prevents the cam from being turned, and locks the door-knob fast. The lock-bolt G, therefore, cannot be drawn backward from its keeper by the door-knob. The point d of the bolt always rests in the slot f, and forms a bearing-guide to the bolt in entering the slot. It is made narrow, so that when the bolt is drawn back it will not project into the notch of the lock-case, and interfere with the turning of the cam.

This arrangement dispenses with the necessity of a separate key-lock on many doors, and also with the use of outside bolts. It is in a convenient and compact form, being combined directly with the door-knob, and the cost is but a trifle over an ordinary door-knob.

It presents the same appearance as an ordinary door-knob, and the bolt is so connected that in seizing the knob to turn it the bolt can also be operated, thereby saving one movement.

A special yadvantage is the direct connection ot' the slide with the knob, by which it is operated with it, and presents no unsightly appearance. In this respect it is superior to other fastenings,Which are complicated and i expensive in construction.

The slot or notch f can be cast in the lockcase and cam, thereby adding nothing to the expense. The slot a in the shank can also be cast, and requires but slight dressing to make it smooth.

The bolt H can be made of malleable iron,

witnesses.

JEROME B. WELLS. Witnesses:

B. F. Oseoon, EDWIN B. SCOTT.

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