US1090804A

US1090804A - Door-check.

Info

Publication number: US1090804A
Application number: US81485714A
Authority: US
Inventors: Henry G Voight
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-01-28
Filing date: 1914-01-28
Publication date: 1914-03-17
Anticipated expiration: 1931-03-17

Description

H. G. VOIGHT.

DooR CHECK.

, APPLICATION FILED JAN. 2'8, 1914.

Patented Mar. l?, 1914.

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Specification of Letters Patent.

Patented Mar. 11? i944.

Application filed January 28, 1914. Serial No. 814,857.

To all whom t may concern Be it known that I, HENRY Voioirr, a citizen of the United States, residing at New Britain, county of Hartford, State of Connecticut, have invented certain new and useful Improvements in Door-Checks, of which the following is a full, clear, and eXact description.

My invention relates to improvements in liquid checks, the object being to improve the check construction and to provide simple and eiective means to prevent leakage.

`In the particular form herein shown, the check is designed to operate in connection with a door controller arm and is combined with a spring whereby the arm will be moved by the spring in a direction to close the door, the speed ofthe closing movement being reduced and controlled by the check.

In the accompanying drawings, Figure l is a side elevation, partly in section, on the line www of Fig. 4. Fig. 2 is a side elevation of the piston, partly in section. Fig. 3 is a side elevation of part of the piston. Fig. 4 is a cross section on the plane of the line y-y of Fig. l. Fig'. 5 is a side elevation of the piston head, removed. Fig. 6 is a plan view thereof.

l represents a check cylinder.

2 represents a piston rod. y

3 represents a piston head connected with the piston rod 2 in the manner hereinafter described.

It will be understood that in operation it is customary to suitably attach the outer end of the piston rod to one of the complementary moving parts to be controlled, and it is customary to attach the opposite end of the cylinder to the other complementary part to be controlled so that as the parts move in one direction, the action of the piston in the cylinder will be resisted by liquid and the too rapid movement of the parts checked thereby. The particular method of connecting the checking mechanism to the parts to be controlled is immaterial.

The piston head is mounted upon what I will term a coupling. This coupling includes the sleeve portion 4 which has a central `passage designed to receive the end of t-he rod 2, the said rod being secured in said passage. At the lower end of the sleeve portion are radial arms or flanges 5-5. At the lower end of the coupling and carried at the lower end of the radial arms 5, is a valve 6. Directly above the valve and spaced apart therefrom is an alined annular baille plate 7, the bore of the sleeve 4 eX- tending substantially centrally therethrough. There is a central passage through the valve 6 in which is loosely mounted a second valve 8 carried by the first valve. This second valve is in the form of a sleeve having a flanged portion arranged to seat around lthe passage when the piston is being moved against the liquid in the lower end of the cylinder. The sleeve has a limited loose play in the passage in which it stands and the passage through the valve sleeve 8 is in line with the passage through the sleeve 4 and plate 7. The piston head 3 is mounted by means of pins or screws 9 9, or other suitable connecting devices, on the lower end of the coupling so as to have a limited amount of loose play. The piston head 3 has a large escape passage therethrough and preferably centrally thereof at the edge of which is formed a seat designed to receive the valve 6 of the coupling so as to make a substantially liquid-tight joint when the piston is moving against the liquid in the lower end of the cylinder; that is to say, moving in the checking direction. When, however, the piston moves in the opposite direction, the coupling will move away from the piston head slightly, opening a relatively free passage past the valve 6 to permit the piston to return freely.

l0 is a tapered valve pin carried by the lower end of the cylinder and projecting through the valve sleeve 8 and into the bore of the sleeve 4 and battle plate 7 (see Fig. l). This pin l0 has a central passage which has a lateral vent ll. l2 is an adjusting valve, the outer end of which is eX- posed for manual operation, the inner end of which is designed to regulate the size of the vent passage ll. fit the opposite end of the cylinder is the usual cover' 14 which may constitute a guide for the rod 2 and which may be provided, if desired, with an antifriction packing 15 held in place by a suitable gland 16. By loosely mounting the piston head 3 upon the coupling by which it is connected to the rod 2, it will be seen that a two-fold advantage is gained; namely, the piston head is self-centering in the cylinder l, and by having the limited loose play, the said piston head may move away from the valve 6 on the outgoing stroke of the piston to permit the liquid to flow freely into the lower end of the cylinder past the piston.

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readily through the piston to the checking end of the cylinder. When the direction of movement of the piston is reversed, the

valves 6 and S, will close, preventing liquid from passing the piston excepting through the tubular sleeve S around the tapered pin. Obviously, if the piston rod 2 is moved with force, the liquid flowing through this sleeve will be forced therethrough in a rapid stream. This stream will encounter the annular baflie 7 and will be thereby directed laterally against the side walls of the cylinder l. On the checking stroke a part of the liquid will, of course, run through the vent passage l1 and through pin 10. The vent may be regulated by the valve 1Q. to vary the freedom of How, and to a corresponding eX- tent, vary the speed of movement of the pist0n on the checking stroke. Heretofore I have found that in the absence o/f the baffle device 7 the powerful stream of liquid forced through the space between the pin and surrounding sleeve 8 has been so great as to cause very objectionable leakage at the upper end of the cylinder around the rod 2, requiring that the cylinder be frequently refilled. This is most objectionable because such devices are frequently placed in very inaccessible places, thereby causing great annoyance and unnecessary labor. By my impro-vement. herein disclosed, I have overcome this defect. In fact, it has been overcome to such an extent that in some instances the upper end of the cylinder may actually have a free opening therein without danger of leakage.

In the particular form of improvement I have shown, I have provided in combination with the checking means a spring closer which includes, in the speciiic form shown, a coil spring 1.7 arranged within the cylinder l and bearing at one end against the cap 11i and at the other end against the piston coupling. I have also provided a short auX- iliary checking spring 1S around the rod 2. By these additions the device becomes a selfcontained closer and check.

It will be understood that in the preferred form of my invention the piston head has a limited longitudinal movement indepeiidently of the piston rod for the purposes described, but from a broad standpoint, and so far as concerns the means for preventing leakage it is non-essential that the piston head be carried by the piston rod in such a manner as to afford limited independent movement.

Ihat claim is:

l. In a check, a cylinder, a checking means comprising a piston rod, a coupling carried thereby, a piston head carried by said coupling and having limited longitudinal movement relatively thereto, an escape passage through said piston head, a valve carried by said coupling arranged to close said passage on the checkingstroke, a

passage through said valve and a baiiie plateV carried by said coupling above said passage to divert a stream of liquid Vflowing throughV said passage when the piston is being moved in the checking direction.

2. In a check, a cylinder, a checking piston, a checking means comprising a piston rod, a coupling carried thereby7 a piston head carried by said coupling and having limited longitudinal movement relatively thereto, an escape passage through said piston head, a valve carried by said coupling arranged to close said passage on the checking stroke, a passage through said valve, a

valve pin carried by the `cylinder and eX- tending into the last mentioned passage to restrict the area of the same, a bafiie plate carried by the coupling above saidv passage and having a pin clearancepassage, said bathe-plate being arranged to divert a stream of liquid flowing through lsaid passage and around said pin when the piston is being moved in the checking direction.

3. In a check, a cylinder, a checking piston, a checking means comprising a piston rod, a coupling carried thereby, a piston head carried by said coupling and having limited longitudinal movement relatively thereto, an escape passage through said piston head, a valve carried by saidrcoupling arranged to close said passage on the checking stroke, a passage through said valve, a valve pin carried by the cylinder'and eX- tending into the last mentioned passage to restrict the area of the same, a bafiie plate carried by the coupling above said passage and arranged to divert a stream of liquid flowing through said passage and around said pin when the piston is being moved in the checking direction, said baille plate having a passage in line with said valve pin to permit the latter to pass therethrough as the piston is being moved to and fro, a passage through said valve pinhaving a lateral vent and manually operable valve for controlling the operative size of said vent in said pin. c

4. In a liquid check, a cylinder, a checking means comprising a piston head, arranged within the cylinder and apiston rod operatively connected with said headland leading externally of said cylinder, means` which the liquid is forced in a stream When the piston moves in the opposite direction, With a baille means arranged close to said passage and movable With said moving parts and arranged in the path of said stream of liquid to check the force thereof and deflect said stream laterally toward the side Walls of said cylinder.

5. In a liquid check7 a cylinder, a checking means comprising a piston head arranged Within the cylinder and a piston rod operatively connected with said head and leading externally of said cylinder, means to permit the fluid to flow freely from one side of the piston to the other side When the piston moves in one direction, said piston HENRY Gr. VOIGHT.

litnesses:

GWENDOLINE A. JACKSON, CHAS. E. RUSSELL.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patent, Washington, D. C.