US478246A

US478246A - Automatic door-closer

Info

Publication number: US478246A
Authority: US
Publication date: 1892-07-05
Anticipated expiration: 1909-07-05

Description

(NoModelJ J. B. STONER.

AUTOMATIC DOOR CLOSER.

No. 478,246. v Patented July 5, 1892..

f WITNESSE $94R %ENTOR A c MAAM WWW ATTORNEYQY 1 ans co., worm-mum, WASHINGTON o c UNITED STATES PATENT OFFICE.

JOHN B. STONER, OF NEl/V YORK, N. Y., ASSIGNOR-TO LEONIE FORDHAM, OF

LONG BRANCH, NEW JERSEY.

AUTOMATIC DOOR-CLOSER.

SPECIFICATION forming part of Letters Patent No. 478,246, dated July '5, 1892.

Application filed January 21, 1892. Serial No. 418,866. No model.)

To all whom, it may concern.-

Be it known that 1, JOHN B. SToNER, of the city of New York, county of New York, and State of New York, have invented a certain new and useful Improvement in Automatic Door-Closers, of which the following is a specification.

This invention relates more particularly to automatic closers for sliding doors and it consists in the construction and novel arrangement of parts, as hereinafter set forth.

In the accompanying drawings, Figure 1 is an elevation of a door with a portion broken away, showing an automatic closer embodying my improvement. Fig. 2 is a rear edge view thereof. Fig. 3 is a side elevation of a door, showing a closer of modified construction. Fig. 4 is an enlarged view of a camarm employed.

Referring by letter to the drawings, A designates a door adapted to slide into the opening A in the wall or partition. The door is supported by rollers a, which run on the rail a in the usual manner.

The closer consists of an arm or rod B, pivoted to the door A at one end, as at b, and havinga roller 1) at its free end adjacent the rear edge of the door, a cam-arm B, and a spring B In sliding doors in residences and similar places it is desirable that the door-closer be hidden from View. I have therefore in Fig. 1 shown the door hollow in its upper portion, and the part B of the closer is arranged within this hollow, as shown in Figs. 1 and 2.

In Figs. 1 and 2 the closing-spring B is shown as attached at one end to the arm B near its free end and the other end of the spring is attached to the rear edge of the door, as here shown, by means of a bracket b fastened by screws or otherwise to the door. The cam-arm B is secured at its rear end to an upright a at the rear-of the opening A, and has an inclined or cam-shaped lower surface 0, upon which the roller 5 of the arm B bears. The incline of the surface 0 is upward from the rear or fastened end of the arm B. Obviously when the door A is pushed into the opening A the free end of the pivoted arm B will be forced downward by the cam-surface c, and thus expand the spring 13 The door,

if desired, may be secured in an open posi tion by any preferable means. Upon releasing the door the retraction of the spring B will draw the roller 1) upward on the camsurface 0 and cause the door to close.

As a means for giving the door a quicker or greater impetus at its start, I provide the cam-surface cat its rear end with an increased pitch 0, and as the door is liable to rebound and fail to latch at the end of its initial forward movement I provide the forward end of the cam-surface c with an increased pitch 0 In Fig. 3 I have shown the closer designed more particularly for heavy doors, such as barn-doors. In this example I employ two arms D D, pivoted at one end to the surface of the door, and two cam-arms D D The cam-surface of the arm D is on the upper edge thereof and the cam-surface of the arm D' is on the lower edge thereof. The rollers 01 of the respective arms D D move upon the cam-surface of the arms D D and a spring cl extends from the arm D to the arm D, adjacent the rollers d. In this construction when the door is opened the arms D D will be caused to diverge at their roller ends and expand the spring. Upon releasing the door, the spring will retract and draw the arms D D toward each other along the cam-surface of the arms D D ,'thus closing the door. In both examples of my improvement the closing of the door is caused by the retraction of a spring carried by the door and operating a movable part against an inclined fixed part.

Having described my invention, what I claim is- 1. The combination, with a sliding door, of an arm pivoted at one end to said door, a roller at the opposite end of the arm, a spring secured at one end to the door and at the 1 other end to the pivoted arm, and a fixed cam- .arm, against which the roller bears, substantially as specified.

2. The combination, with a sliding door, of 5 a closer consisting of the pivoted arm having a roller and a spring carried by the door and the fixed arm having the inclined surface provided with an increased pitch at its rear end, substantially as specified.

3. The combination, with a sliding door, of a closer consisting of the pivoted arm having r a roller at its free end and a spring carried by the door, and the fixed arm having the inclined 01' cam surface provided with an increased pitch at its forward end, substantially as specified.

4. The combination, with a sliding door, of a closer consisting of a, pivoted arm having a roller at its free end and a spring carried by said door,and a fixed arm having an inclined 01' cam surface provided with an increased 10 pitch at each end, substantially as specified. Signed at New York city, in the county of New York and State of New York, this 1st day of January, A. D. 1892.

JOHN B. STONER.

W'itnesscs:

LOUIS L. ROLLAND, ABRAM S. HIRSOH.