US170887A

US170887A - Improvement in door-springs

Info

Publication number: US170887A
Authority: US
Publication date: 1875-12-07
Anticipated expiration: 1892-12-07

Description

W. H. MYERS.

DOOR-SPRING. V No, 170,887' Patented Dec. 7,1875.

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0 E a m P .z' 6 O -Q INVENTOR @XJIZZZSEZMM ATTORNEYS PETERS, FHOTO-UTNOGRAPHER. WASHINGTON. D-

NITED STATES PATENT OFFICE.

WILLIAM H. MYERS, OF OREGON, WISCONSIN.

IMPROVEMENT IN DOOR-SPRINGS.

Specification forming part of Letters Patent No. 170,887, dated December 7, 1875; application filed October 9, 1875. I v

To all whom it may concern Be it known that I, WILLIAM H. MYERS, of Oregon, in the county of Dane and State of Wisconsin, have invented a new and valuable Improvement in Door-Springs and Locks; and I dohereby declare that the following is a full, clear, and exact description of the con struction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a representation of a plan view of my door-spring and lock, and Fig. 2 is a side view thereof. Fig. 3 is a sectional detail view.

This invention has relation to, springs and locking devices for doors, shutters, and for other purposes; and the nature of my invention consists in two pivoted lever-arms, which are acted on by a springarm, in combination with a looking-clamp, as will be hereinafter explained.

In the annexed drawings I have represented my improved device applied at the upper end of a door, A. B designates a bracket, which is secured to the lintel of the door-frame A, and which is constructed with lugs aa, through which a shaft, 12, passes, having fixed to its lower end an arm, 0. D designates a bracket, which is secured to the door A, and-constructed with a lug, 0, having a stud, f, fixed to it. The studf affords a pivot for an arm, E, the axis of which pivot coincides with the axis of the shaft b when the door is shut, as shown in Fig. 1. The free ends of the two arms 0 E are enlarged at g g, and are connected together by means of a screw-threaded pivot, h, having a thumb-piece on its upper end, and a setting-nut, j, on its lower end. Between the two heads 9 g is afriction-washer, i, which will yield more or less when the pivotscrew h is tightly set up, and allow a lockjoint to be formed between the two arms (J E. G designates a spring, one end of which is coiled around the shaft 1) and secured to it. The other end of this spring bears against the neck of the pivot-screw h, for closing the door and keeping it closed. The force with which spring Gr operates on the ends of the arms 0 E to shut the door can be regulated by means of the pivot-screw h.

If the free end of the spring G is removed from the pivot-screw h it will cease to act on the door, and the latter may be held open at any angle by tightening the pivot-screw h.

For the purpose of preventing the door from being opened too far, I form a stop-lug, l, on the enlargement g, which, when the door is opened to a given point, will abut against the arm 0, and arrest the door. a

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

In combination with the two pivoted arms C E, the arm E having a stop-lug, l, on its free end, the spring G, the clamping screw h, nut j, and washer i, substantially as described.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

WILLIAM H. MYERS. Witnesses:

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