US514735A - short - Google Patents

Description

0; P. SHORT.

DOOR CHECK- (Nd Model.)

Patented Feb. 13, 1894.

Iazve %M NITED STATES PATENT Erica- CHARLES F. SHORT, OF NEW YORK, N. Y.

DOOR-CHECK.

SPECIFICATION forming part ofLetters Patent No. 514,735, dated February 13, 1894.

Application filed July 20, 1893.

' is a specification.

My invention relates to improvements in the class of door-checks which employ a lever fulcr-umed on a plate secured to the door, and a strong spiral spring to throw down the operative end of the lever when said end is depressed by the foot sufticiently to allow the spring to act. When the lever is elevated and inactive the axis of the spring is so nearly aligned with that of the lever that the latter stands in somewhat unstable equilib rium. As heretofore made, so far as I am aware, the lever in this class of door-checks stands, when elevated, in such unstable equilibrium that the jarring of the door or the brushing against it of a dress, is liable to set the lever on the floor, and the lever is so insecurely mounted on the plate that it is liable to fly ofi in operating or handling the check.

The object of my invention is to improve the device in respect of the defects above noted, as will be hereinafter described.

In the accompanying'drawings which serve to illustrate an embodiment of my invention, Figure 1 is an inner side view of the doorcheck, detached from the door. This view shows the lever in its normal, inoperative position. Fig. '2 is an outer side view of the door-check, showing it secured to the door and the lever in operative position. Fig.3 is a plan of the device with the parts in the position seen in Fig. 2.

X represents a door and Y the floor over which the door swings.

A is the attaching plate provided with holes to receive attaching screws, 0., for securing the plate to the door. On the front of this plate is formed a projecting bracket, a", having a pendent flange, a. In this flange a, is formed an inclined slot, opening downward, and in the plate A (see Fig. 1,) is formed a like slot, which registers with the slot in the flange Ct. These slots form bearings for two fulcrum trunnions, b, b, on the Serial No. 480.997. on model.)

lever, B, which is mounted on the plate as clearly shown. This lever is formed with a hollow in its under side which gives it a nearly semi-tubular form. O is the spring, which is attached at one end to a pin, 0, in the operative end of the lever B, and to a stud, of, on the plate A, at its other end. When the lever is in. its inoperative position, as in Fig. 1, the spring 0 occupies the hollow of the lever and the strain exerted by the spring is substantially along the axis of the lever; but when the operative end of the lever is slightly depressed, the line of strain is displaced downward and the spring draws the operative end or head, B ,of the lever down forcibly to the floor, as seen in Fig. 2. r

In order to impartsuffioient stability to the lever B when in its normal position seen in Fig. 1, whereby it will require a moderate pressure with the foot on its operative end or head, in order to start it down, I form on each of the trunnions b a flat'face, b which bears on the flat rear margin of the bearing-slot, as clearly shown in Fig. 1, when the lever is at rest. This flattened face serves to put the lever in more stable equilibrium and it also serves to some extent to relieve the tension 011 the spring, as the cutting away of a part of the trunnion lessens the distance between the pin a and stud a, to which the respective ends of the spring 0 are attached. It is not desirable that the spring shall be under undue strain when the lever is at rest.

The'bracket a and flange a enable me to provide a hearing at each side of the lever, which eliminates the element of side-draft and prevents thereby the flying out of the lever when the stop is not carefully handled. This construction also imparts strength and durability, which is very desirable in a structure where the parts are always under strain from a spring. To return the lever to the position seen in Fig. 1 from that seen in Fig. 2,it is only nec- 5 essary to depress the tail B, of the lever with the foot.

The bracket a forms aconvenient rest for the foot while operating the-lever.

Ordinarily a door-check of this class has a mo rubber block secured to the operative head or end of the lever by a wrapping of wire, the block forming a cushion to bear on the floor and prevent the metal of the lever from striking the same. I find this construction objectionable mainly on account of the Wire of the wrapping, and in lieu thereof I employ a rubber roller, d, preferably corrugated, mounted on a pin, d which passes through the checks or flanges on the head of the lever.

Having thus described my invention, I

1. In a door-check, the combination with the attaching plate provided with a bracket and with slotted bearings for the lever, of the said lever provided with trunnions to engage said slotted bearings, said trunnions having each a flattened face which bears on the margin of the slot when the lever is in its normal position, and the spring 0, securedat one end to the lever and at the other end to the attaching plate, as set forth.

2. In a door-check, the combination with CHARLES F. SHORT.

Witnesses:

HENRY CONNETT, J AMES K. DUFFY.

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