US84756A - Improvement in door-retainer - Google Patents

Description

UNITED STATEs PATENT OEEIoE.

G. IV. PERRY AND J. D. BILLINGS, OF WILMINGTON, DELAVARE.

IMPROVEMENT IN DOOR-RETAINER.

Specification forming part of Letters Patent No 84,756, dated December 8, 1868.

To all whom it may concern:

Be it known that we, G. W. PERRY and J. D. BILLINGS, of Wilmington, Delaware, have invented an Improved Door-Retainer 5 and we do herebydeclare the following to be a full, clear, and exact description of the same.

Our invention consists of a device, fully described hereafter, for retaining a door when it is open.

In order to enable others to make and apply our invention, we will now proceed to describe its construction and operation, reference being had to the accompanying drawing, which forms a part of this specilieation, and in which- Figure l is a vertical section of our improved door-retainer, and Fig. 2 a perspective view.

In the present instance our invention is illustrated as applied to arailway-car, of which A A represent the floor, and B the lower part of the door.

D is a light metal box, fitted into a recess or opening in the iioor, to which the two flanges a a of the box are screwed.

E is the retaining-plate, the lower portion of which is so tted to the box that it can slide freely therein and vibrate vertically, but can have no lateral or longitudinal movement independent of the box.

Within the box, and at each end of the same, is a spiral spring, b, the springs intervening between the bottom of the box and plate E, and tending to elevate the latter, which, however, is limited in its upward movement by lips c on the box, which overlap the ends of the plate. The spiral springs b b are maintained in their proper-position by projections f on the box and similar projections on the plate. The upper portion of this plate E is formed in the manner illustrated in the drawingthat is to say, it has au inclination, i, extending from one end of the plate to the edge of the cavity m, and from the edge n of this cavity there is a downward inclination to the opposite end of the plate.

The under edge of the door is provided with a rounded metal plate, t, for sliding over the plate E and fitting in the cavity m.

On opening the door, and thereby moving it in the direction of the arrow, Fig. l, the plate t on the door will strike the inclination i of the plate E, which will yield as the movea ment of the door in the direction of the arrow is continued, and until the plate tcoincides with the cavity an, when the spiral springs will elevate the plate E and press it against the door, which is thus maintained in its open condition.

When the door has to be closed it is pulled or pushed in a direction contrary to that pointed out by the arrow, a slight effort being necessary to depress the plate, and thereby release the door.

It will be seen that the plate a serves as a guide for the plate or block E, that it protects the springs from injury, and prevents the access of dust and dirt, which would clog the springs and interfere with their action.

It is also apparent that the plate a holds the block E so securely in its place (without interfering with its necessary movements) that it cannot be disengaged or misplaced by being struck by the foot or other object.

XVe claim as our invention and desire to secure by Letters Patent- A plate, a, having an opening for the reception of a block, E, which rests upon springs d below the plate, the whole being construct ed and operating substantially as and for the purpose described.

In testimony whereof we have signetl our names to this specification in the presence of two subscribing witnesses.

(3. W. PERRY. J. D. BILLINGS.

Witnesses J AMES MOORE,

TM. B. WrGGiNs.

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