US224092A - Door-check - Google Patents

Description

N. KIDNEY.

Door-Check. W No. 224,092. Patented Feb. 3, 1880.

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NELSON KIDNEY, OF DUNKIBK, OHIO.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. 224,092, dated February 3, 1880.

Application filed July 29, 1879.

To all whom it may concern:

Be it known that I, NELsoN KlDNEY, of Dunkirk, in the county of Hardin and State of Ohio, have invented certain new and useful Improvements in Door-Checks; and Ido hereby declare that the following is a-i'ull, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being'had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

My invention relates to the production of a new and improved door stop constructed to hold the door in any desired position to which it may be swung upon its hinges by means of an elastic pad or ball, which is pressed upon the floor and automatically locked in close contact therewith,as will be fully explained hereinafter.

Figure l is an elevation of my device applied to a door and in working position, a part of the inclosing-shell being broken away to more clearly show some of the mechanism;

and Fig. 2 is a front View of thelatch detached,

which holds the friction-pad in contact with the floor.

A represents the edge of a door, which may be hinged in any desired or approved manner. B represents thefloor over which the door swings. O is a vertical cylindrical shell, secured to the door by means of brackets or ears 0 c, which may be cast in one and the same piece with the shell or attached thereto. 0 is a narrow vertical slot formed in the front side of the shell, and extending about half the length thereof. D D is a plunger-rod, supported within the cylinder or shell in such manner as to slide vertically therein. The lower part, D, of this rod is of smaller diameter than the upper part, D.' D is an elastic ball or pad attached to and carried by the lower end of the rod. (1 is a shoulder formed by the junction of the part D with the larger part D of the rod, and d is adog or lockingpin projecting from the front-side ofthe larger part D of the rod. This pin has its outer end beveled-upon the under side, and projects through the slot 0 which is formed for its reception in the shell 0. E is a spiral spring surrounding the lower smaller part, D, of the rod. The lower end of this spring is sup-' ported upon a cap orinwardly-projectingflan ge at the lower end of the shell, the upper end of the spring engaging with the shoulder at of the rod. Thus the spring thrusts the rod in an upward direction whenever it (the rod) is free to move in that direction, as will be explained. F F is a spring-latch, the lower end being attached rigidly to the shell 0, the upper end being free to vibratetoward and from said cylinder. The part F is bent outward to form a foot-piece. f f f are a series of holes in the latch to receive the locking-pin d.

This device may be operated as follows: AF-

ter the door has been swung into the desired position the rod D D may be forced downward until the elastic ball or pad is thrust upon the floor with such pressure that the friction of said pad upon the floor will hold the door in place, the pin d entering one of the holes fin the spring-latch F, and thus holding the ball firmly down upon the floor, and, of course, holding the door in position.

When it is desired to release the door and permit it to swing, pressure may be applied to the outer end of the foot-piece F, which will release the latch from the pin d, when the rod upward until the said pin 61 strikes the shell 0 at the upper end of the slot 0.

Thus the upper end of the slot serves as a stop to prevent the spiral spring from throwing the rod out of the shell. I

It is apparent that if, from any cause, the upward movement'of the rod D D be not stopped by the contact of the pin d with the wall of the upper end ofslot c, the ball or pad D will engage with the bottom of shell 0, and thus prevent the rod from being thrown out of the shell by spring E.

Itwill be understood that my device can be used without the spring E, because the friction of the pin d against the latch B" will .ordinarily support the rod and ball and prevent the ball from accidental contact with the floor; but I prefer the combination of parts shown,

because without the spring E the operator would be obliged to stoop down and lift the rod and ball whenever he desired to let the door swing freely.

I am aware that door-checks have hereto fore been constructed with latching-springs having ears or lugs projecting from the opposite edges; but such locking devices necessitate that the door-check mechanism should be substantially rectangular in cross-section in order that there may be a flat face in front, having at its opposite sides two series of recesses to receive the lugs or ears upon the latch-spring. Making the door-check thus rectangular necessitates that the reciprocating parts shall be made of several pieces in order that a coiled spring may be advantageously placed around it. I, on the otherhand, have constructed a door-check of great sim plicity and with few pieces by so constructing the latching-spring that it shall engage with the reciprocating bolt by means of a series of centrally-arranged perforations, whereby the boltitself may be made in one continuouspiece,beingof a shapein cross-section to advantageously receive the coiled spring around it. Moreover, by making the locking-spring F stationary and arranging it to have the free end extend upward, and by bending it as shown at F, it can be readily operated by the foot to release the door without necessitating that the operator shall stoop or bend in order to manipulate the devices byhand. The bolt D is provided with a head or knob, whereby the check can be thrust downward by a pressure applied directly upon the top of the bolt, so that the operator can fasten the door in any position by a slight pressure on the top of the knob.

What I claim is- The herein-described door-check, consisting of the combination of the vertically-slotted shell, provided at its lower end with an inwardlyprojecting flange, the sliding rod D D, provided with a shoulder, 61,, and pin (1, projecting through the slot in the shell, the spring E, a-stop to limit the upward throw of the rod D D, and the spring-latch F F, arranged outside the shell and engaging with the pin (1, substantially as set forth.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

NELSON KIDNEY.

Witnesses:

J. J. WooD, H. H. Woons.

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