US1070799A - Door-check. - Google Patents

Description

T. S. GRISELL.

DOOR CHECK.

APPLICATION FILED 00129, 1912.

1,070,799, Patented Aug. 19, 1913. v

Inventor Attorneys UNK THOMAS S. GRISELL, OF BURB OAK, KANSAS.

DOOR-CHECK.

To aZZ whom it may concern:

Be it known that I, Trioti'as S. GRISELL, a citizen of the United States, residing at Burr Oak, in the county of Jewell and State of Kansas, have invented a new and useful Door-Check, of which the following is a specification.

This invention relates to door checks, its object being to provide a simple and com pact device of this character which can be applied readily to a door and which can be readily adjusted so as to increase or reduce the force exerted by the door upon the check.

'With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement or" parts and in the details of construction hereinafter de scribed and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, Without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings :-Figure 1 is a perspective view of the door check in position, the door being shown partly open. Fig. 2 is a plan view of the structure, the parts being positioned as shown in Fig. 1. Fig. 3 is an enlarged longitudinal section through the cylinder of the door check. Fig. 4c is a detail view showing a slightly modified form of bracket.

Referring to the figures by characters of reference A. designates a portion of a door frame and B designates a door. Secured to the top of the door frame are oppositely disposed angular brackets 1 connected by parallel guide rods 2, these rods being fixedly secured to the brackets. A cross head 3 is mounted to slide on the rods and interposed between this cross head and one of the brackets is a spring I which bears at its ends against the cross head and bracket respectively. An angular bracket 5 is secured to the upper portion of the door B near the hinged side thereof, this bracket including an outwardly extending arm 6 provided with a plurality of apertures 7. Any one of these apertures is designed to receive a pintle 8 extending downwardly from one end of a cylinder 9. This cylinder has a Specification of Letters Patent.

Application filed October 9, 1912.

Patented Aug. 19,1913.

Serial No. 724,871.

piston 10 mounted to reciprocate therein, and the rod 11 of the piston is pivotally connected, as at 12, to the cross head 3. An air inlet tube 13 extends from one end of the cylinder 9 and has a check valve 14: whereby outflow of air through the tube is prevented.

An air vent 15 is also formed at that end from which the tube 13 projects and this vent is provided with a valve'16 whereby the escape of air therethrough may be controlled readily. It is to be understood that the spring 4 is connected at its ends to the cross head 3 and the adjacent bracket 1 and thus exerts a constant pull upon the cross head 3. As a result, the piston 10 is normally located in that end of the cylinder 9 nearest the tube 13. Then the door 13 is opened, arm 6 pulls on pintle 8 and thus causes cylinder 9 to slide upon the piston 10, the movement of the piston being retarded by reason of the fact that spring 4. is interposed in the path of the cross head 3. Said spring, however, is placed under compression during this operation and, as the cylinder continues to move relative to the piston 10, air enters the tube 13 so as to fill the space back of the piston. As the door B is to be provided with the usual spring hinges it will be apparent that, when the door is released, it will swing closed. During this movement of the door the arm 6 will push against the pintle 8 and thus cause the cylinder 9 to move toward the remote bracket 1. Spring 4 will promptly expand and shift the cross -head against said remote bracket 1 whereupon the said cross head will be brought to a sudden stop and the air trapped between the piston 10 and the valve end of the cylinder 9 will cushion the door immediately prior to reaching its closed position. This trapped air gradually leaks through the vent 15 and when the valved end of the cylinder is finally brought close to the piston 10. the door comes to its closed position. It will be seen that by shifting the pintle 8 within the openings 7 the leverage exerted by the door B can be increased or diminished as desired.

Instead of utilizing a bracket having a rigid arm, as shown in Figs. 1 and 2, the arm of the bracket can be hingedly mounted, as shown at 18 in Fig. 4 so that, when the door is opened, this arm will swing into alinement with the cylinder. A spring 19 may be employed for holding the arm 18 normally at an angle to the side of the door.

l Vhat is claimed is l. A door check including guides, means for connecting them to the top of a door frame, a slidable member on the guides, a spring for controlling the movement of said member, a piston pivotally connected to the slidable member, a cylinder mounted to slide on the piston, said cylinder having a valved inlet an l. a valved outlet, and a spring controlled member pivotally connected to the cylinder and adapted to be attached to a door.

2. A door check including guides, means for connecting them to the top of a door "frame, a slidable member on the guides, a spring for controlling the movement of said member, a piston pivotally connected to the slidable member, a cylinder mounted to slide on the piston, said cylinder having a valved inlet and a valved outlet at one end,

and means for pivotally and adjustably connecting the cylinder to a door.

3. A door check including guiding means adapted to be connected to a door frame, a slidable member on said guiding means, a spring for controlling the movement of the slidable member, a piston pivotally connected to the slidable member, a cylinder mounted to slide on the piston and having a valved inlet and a valved outlet, an arm adapted to be connected to :1 door, said arm having a plurality of openings therein, and a pintle depending from the cylinder and adapted to be seated in any one of the open ings.

In testimony that I claim the foregoing as my own, I have hereto atlxed my signa ture in the presence of two witnesses.

THOR AS S GRESELL.

lVitnesses F. S. TUCKER, C. E. HALLBERG.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). G.

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