US431897A

US431897A - Territory

Info

Publication number: US431897A
Authority: US
Publication date: 1890-07-08
Anticipated expiration: 1907-07-08

Description

(No Model.)

J. W. LAIRAMORE.

DOOR CHECK.

NO. 431,897. Patented J 8, 1890.

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UNITED STATES PATENT OFFICE.

JAMES IV. LAIRAMORE, OF SALT LAKE CITY, UTAH TERRITORY.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. 431,897, dated July 8, 1890.

Application filed April 1, 1890. Serial No. M61189. (IIo model.)

To all whom it may concern:

Be it known that I, JAMES W. LAIRAMORE, a citizen of the United States, and aresident of Salt Lake City, in the countyof Salt Lake and Territory of Utah, have invented certain new and useful Improvements in Door-Checks; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawin gs, and to letters of reference marked there on, which form a part of this specification.

Figure 1 of the drawings is a perspective View. Fig. 2 is a view of the interior, and Fig. 3 is a View of the lever D.

This invention relates to devices for holdin g an open door in any desired position; and it consists in the novel construction and combination of parts, as hereinafter set forth.

In the accompanying drawings, the letter A designates a door, to the lower part of which, on one side, is secured a semicircular casin g B, provided with a quadrant-slot C on one side, as shown, and on the other side a pin or stud g.

D is a lever on the outside of the casing, turning on a central pivot pin or screw d, projecting inside through the wall E of the easing 13 and having a guide-pin F at one end, said guide-pin passing through the quadrantslot 0 and projecting into the interior of the casing.

The casing B consists of a semicircular box having its side next the face of the door sooured to the latter by means of screws passing through perforated lugs f, said box or casing having inside, at one end near its lower portion or base, the transverse pin or stud g, projecting toward the door. The lever D is usually slightly curved or deflected horizontally at its forward end, as at a, to afford a seat for a rubber band or cushion 71 which affords a frictional bearing adapted to be presented to the floor when the check-lever D is depressed to bring its end in contact with the latter.

H is a contracting spring, which may be of spiral wire, or may consist of a stout rubber band concealed within the casing 13 and extending from the inwardly-projecting guidepin F of the lever to the stud or pin g. By means of this spring the position of the lever D is controlled, so as to remain in a substantially horizontal position when not in use, as shown in Fig. 2; or when the lever is to be brought into frictional contact with the floor the spring also serves an important purpose, giv ing the lever an elastic bearing on said floor.

In order to provide for retaining the checklever D in horizontal position when not in contact with the floor, the inside stud or pin 9 is placed below the plane of the fulcrum of said lever, and lever D is turned to move its guide-pin F to the lower extremity of the slot in the casing, said lower extremity being below the plane of the fulcrum and stud as shown.

The normal tendency of the spring to contract as the lever D is moved to one side or the other of the dead-center formed by the pressure of the spring in the plane of the pivot of the lever has the effect to hold the lever either in its lowered or elevated position.

WVhat I claim is 1. In a dooncheck, the combination of the casing B, having the segmental quadrantslot at one side, the interior stud g at its other side near its base, and perforated lugs for the passage of screws to secure it to the side of the door, with the exterior lever pivoted to the casing, its fulcrum above the plane joining the stud g and the lower end of the quadrant-slot, its inwardly-projecting guide-pin I and the spring within the casin g connecting the guide-pin to the stud 9', sub stantially as shown and described.

2. In a door-check, the combination of the quadrant-slotted casing B, secured to the door, and an external check-lever centrally pivoted to said casing and controlled and operated by a concealed spring within the casing, substantially as shown and described.

111 testimony whereof I affix my signature in presence of two witnesses.

JAMES IV. LAIRAMORE.

WVitnesses:

M. BLACKBURN, E. E. HOLT.