US863610A

US863610A - Door-check.

Info

Publication number: US863610A
Authority: US
Inventors: John G Keith
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-08-08
Filing date: 1906-08-08
Publication date: 1907-08-20
Anticipated expiration: 1924-08-20

Description

PATEN'VI'ED A G.;2Q.[19'07.

G. KEITH. DOOR CHECK. APPLICATION FILED AIIGl 8.,1906.

' 'WITNEBSIEEI JOHN G. KEITH, OF BROOKLYN, NEW YORK.

DOOR-CHECK.

Specification of Letters Patent.

Patented Aug. 20, 1907.

Application filed August 8,1906. Serial No. 829,655.

To all whom it may concern:

Be it known that 1, JOHN G. KEITH, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented new and Improved Door-Check, of which the following is a specification.

This invention relates to mechanism for holding a door in a fixed position when opened to any desired angle.

"he object of my invention is an increased efficiency in operation and economy of construction of such a door check, and to these ends my invention consists in providing a supporting plate or casing for my door check within or supported by which there may be contained a spring operating to retain the check in either its operative or inoperative position.

For reducing the expense of manufacturing and assembling such a door check, I have found it advantageous to form open bearings for the door check lever proper and to provide, preferably a leaf spring of such a conformation and so supported relatively to the check lever proper as to hold the door check positively in its bearings and at the same time operating to hold the check in its operative and inoperative position. In such a construction I have found it advantageous to make use of the friction between a practically fixed spring of the character just above described and a moving end of the door check lever adapted to be engaged and held by the spring. I also provide a casing having a slot through which an operating knob for the door check may project and such operating knob of such a conformation as to permit of the ready assembling of the parts. Although it is not essential, still I prefer that the operating knob be formed integrally with the check lever. The usual rubber tip for engaging the floor or carpet thereon in such acheck I secure in place by means of a clove-tailed arrangement,-as will be explained.

Similar letters refer to similar parts throughout the several views.

The accompanying drawings illustrating a door check embodying my invention are as follows:

Figure 1 shows a view of the lower portion of a door with my check attached thereto, such check being shown in full lines in its operative position as engaging the floor beneath the door, while the inoperative posithe door, in engagement with which is seen the rubber tip b secured in the lever B, comprising the operative lever of my check. This lever B carries trunnions I) seated in open bearings formed in the projecting lugs a formed on the case A. This case A is wedge shaped in general appearance and has projecting lugs a through which holes are formed to receive screws, as indicated, for attaching the same to the door. An opening in the case A is provided near the bottom on one side to receive the lever B. The lever B terminates at its outer end in the usual knob b carrying the rubber tip I) which is dove-tailed into such knob If. "he lever B extends within the case A and is bifurcated at its inner end and between the projections c and 0 thus formed at the inner end of the lever B there is provided a suitable surface for engaging the spring S.

The spring S is formed of a plate of suitably elastic material and bent over and around and secured upon the pin 3 carried by the face of the case A and is forced in between the pin 3 and the lug c on the inside of the case r The spring S operates, as indicated, to force the lever B to the right, seen in Figs. 1 and 2, and to the left as seen in Fig. 3, and serves thus to keep this lever B seated within the bearings formed for the trunnions I) carried by such lever B.

On the inner end of the lever B, and preferably formed integrally therewith, I provide a knob K of such a conformation, as indicated, that it may be inserted through the slot is in the front side of the case A when such lever B is moved to a position nearly or quite tangentialto the direction of this curved slot, and when the lever B is thereafter turned to a position nearly radial to the slot is, the stem of the knob K may be drawn to the right within the slot is, permitting the trunnions b on the lever B to pass around the lugs a carried by the case A, when the spring S may be inserted in position and then the lever B moved upwardly and forced to the left, as seen in Fig. 1, against the action of the spring S until the trunnions b carried by the lever B are forced into position in the bearings therefor carried by the lugs a and in which bearings such trunnions are firmly held seated by the action of the spring S in forcing the lever B to the right.

The front of the case A each side of the slot is cooperates with the knob K. and the projection c on the lever B to form a guide for the inner end of the lever B, while the horizontally disposed slot k permits the drawing of the lever B to the right so that the trunnions may be carried around and over the lugs a and forced into the bearings carried thereby. The slot is is in the form of an arc of a circle having its center at the trunnions b. For limiting the downward movement of the inner end of the lever B, I provide a step c on the lower corner of the case A and arranged to be engaged by the projection 0 carried by the lever B. I have sometimes found it desirable to provide a detachable knob K,

as seen in Figs. 4 and 5, threaded 1nto the projection 0 carried by the lever B and having formed integrally therewith the vane k adapted to close the slot k when the lever B is in its inoperative position. This is seen more clearly in Fig. 4, where a part of the lower left hand corner of the case A is shown only in outline.

The operation of my check is as follows: the parts having been assembled in the manner above described and the case A attached to the door D at the proper height from the floor F thereunder, the outer or left hand end of the lever B is forced downwardly by the foot of the operator against the action of the spring S. The conformation and arrangement of the parts is such, as will at once be seen, that little effort is required to force the right hand end of the lever B downwardly, the spring S serving to hold it in its inoperative position, indicated in dotted lines at B in Fig. 1, by the friction thereof against the left hand and inner end of the lever B. It will be observed that the conformation of the parts is such also that when the outer end of the-lever B is held down in a position to check and hold the door, the spring S operates quite strongly to hold it in this position as well by the direct action of the spring as also by the friction between the spring and the left hand end of the lever B and that some little effort is required to force the knob K downwardly to move the checking lever B to its inoperative position, free from the floor.

I desire to call attention to the fact that the lever B carries an operating knob projecting through a slot in the case A, through which it may be inserted for assembling the parts of my check only by moving the lever B to a position considerably without the normal range of its operative positions, and on account of this feature, the operating lever of my check is held seated in its bearings by the actuating spring. The side of the case around the slot through which the operating knob K projects together with such operating knob comprise a means for guiding the inner end of the checking lever in its operative movements.

What I claim is:

I 1. In a door check, a supporting plate adapted to be attached to the door, a check lever pivoted to such plate in an open hearing or open bearings, a spring adapted to hold such lever seated in such bearing or bearings and also adapted to hold such lever in its operative and inoperative positions.

2. In a door check, a case adapted to be attached to a door, a check lever pivoted to such case in an open hearing or open bearings, a spring adapted to hold such lever seated in such bearing or bearings and also adapted to hold such lever in its operative and inoperative positions, such check lever carrying .an operating knob arranged to pro ject through a suitable slot therefor in such case, such knob and the end of such lever to which it is attached cooperating with the side walls of such case about such slot to guide such lever in its movement.

3, In a door check, a case adapted to be attached to a door, a check lever pivoted to such case in an open bearing or open bearings, a spring adapted to hold such lever seated in such hearing or bearings and also adapted to hold such lever in its operative and inoperative positions, a slot in the wall of such case, an operating knob formed integrally with such lever and adapted to be inserted through such slot only when such lever occupies a position angular-1y without the range of the normal movement of such lever when seated in its bearings.

-L. In a door check. a case adapted to be attached to a door, a check lever pivoted to such case in an open hearing oropen bearings, a spring adapted to hold such lever seated in such hearing or bearings and also adapted to hold such lever in its operative and inoperative positions, a slot in the wall of such case, an operating knob formed integrally with such lever and adapted to be inserted through such slot only when such lever occupies a position angular-1y without the range of the normal movement of such lever when seated in its bearings, such knob and 1e ver cooperating with the side wall of such case about such slot to guide such lever in its movement.

JOHN G. KEITH.

Witnesses .IULIUs Ln GRANT KRAUSS, .712, B. FRANK COOLEY.