US1544751A - Door opening and closing device - Google Patents

Description

J. N. HAYNES ET A1.

noon OPENING AND cLpsIm DEVICE mod Oct. 13. 1921 s shuts-spat 1 w Jose/ N- Hnwves 5L 4m n K-flnmlsa Patented July 7, 1925 UNITED: {STATES PATENT OFFICE.

JOSEPH N. HAYNES AND BLANCHE 1K. HAYNES, OF CHICAGO, ILLINOIS.

DOOR OPENING AND CLOSING DEVICE.

Application filed October 13, 1921. Serial No. 507,581.

To all whom it may ooncem: I

Be it known that we, J OSEPH N. HAYNES and BLANoHn K. HAYNES, citizens of the United States, and residents of the city of Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in a Door Opening and Closing Device; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the'numerals of reference marked thereon, which form a part of this specification.

This invention relates to devices, for openingand closing doors from adistance, such as may be employed in mines or in garages ;or other places where control from adis- 'tance is desirable.

. It is an object of this'invention to provide a pneumatic means whereby doors may be 1 swung open or closed at will.

It is a further object of this invention to provide such means with a counter-weight which can be made to assist in the manual pulley 25. 1 From the pu1ley25, each of the opening of the door when desired.

Other and further important objects of. this invention will be apparent from thej disclosures in the drawings and the accompanying specification.

The invention n a preferred form) s illustrated inthe drawings and hereinafter more fully described.

On the drawings: v Figure l is a front elevation. Figure 2 is a top plan view. Figure 3 is a detail section through one of the doors, showing the counter-weight;

Figure 4 isv a section through the. pneu matic cylinder andthe accompanying pip- .1ng Figured is a detail showing the construction of the lower end of the piston-actuated rod. I

' Figure 6 is a section showing the-lower end ofthe piston withthe-parts int-he position corresponding to, the endof the stroke oppositerthat illustr ted in Figure As shown on the drawings: I There are. two doors '1 hung upon the hinges 2. Brackets 3 alt the upper end'of vthe doors serve as places of attachment for ropes 4 and 5 which lead to counter-weights 6 and 7. The rope 4 is led through arpulley 8 pivoted to:a fixture 9 secured above the upper end of the door, and in a similar the other door.

.with one another.

way the rope5 is led around a pulley 10 which is pivoted to a fixture 11 secured above the doorsswing the ropes do not interfere Av weight 12 is mounted upon each of the doorsto slide vertically, guiderods 13 being provided for the sliding and ears 14 being provided upon the weights to co-operate with the guide rods. The upper end of the weight is provided with a groove 15,

above which there is a rounded head 16. A

spring 17 is secured to each door so, as to normally lie in the groove15. Fixtures 18 and 19, each provided with a ring20, surrounding the spring 17 serve to hold the ropes is led around the pulley 31 to hooks 32 upon the lower end of a I piston rod 33 secured to a piston 34 working in a cylinder :35. The pulleys 8, 10, 23,28 and 29 are mounted in any suitable way toenable them to, accommodate themselves to the direct-ion @Of the ropes leading to and from them. Anyother of the pulleys, for example 30, -which are located where a rope is to be guided through a path not all in one plane may be similarly nounted, if desired.

The cylinder 35 is provided at itsnpper end with a hook 36 by which it is supported frorn a standard 37. Air is brought to the cylinder through a pipe 39 which is con- ,nected by means of a three-way cook 40 to the pipe 41 leading to thesupply of air, or

- with the pipe 42 leading to the exhaust. The

end of the pipe 39 is connected to the-entrance por-t 43 of the cylinder by means of a flexible connection 44. There is also a connection between the pipe 39 and theinlet port 43, which connection is provided with a check valvcj45; Thepipe 44 is controlled means ofa valve 46 which, in the positionillustrated in Figure 4, leaves the passage from pipe'44 to port 43open, but in the position illustrated in Figure 6 closes this passage. Upon the piston rod 33 is mounted a collar which, upon the up-stroke of I The pulleys 8 and 10 are I .at different levels so that the rope 5 is at all points below the rope 4. Consequently, as .60

the piston, serves to bring the valve 46 to the position illustrated in Figure 6. Upon the down-stroke of the piston, the valve 46 is brought to the position illustrated in Figure 4 by the spring 48.

In the operation of the device, when it is desired to open the doors, the attendant moves the valve 40 to the position illustrated in Figure 4. Air will then pass from the pipe 41 through the pipes 39 and 44 and port 43 and cause the piston 34 to go upward. This will pull both the ropes 21 and 26. As shown in Figure 2, the pull exerted by these ropes is at an angle tothe plane of the doors. Consequently this pull will cause the doors to rotate about their hinges and the doors will open. The pull exerted by the ropes 21. and 26 is received by the weights 12, but it cannot cause these WVeigllts to move upward because of the action of the springs 17 against the lower edges of the grooves 15. These "grooves at the lower edges present a square shoulder over which the springs 17 cannot slip. As the doors swing open, the ropes 4 and 5 pull up the counter-weights 6 and 7.

When it is desired to close the doors, the

' operator moves the valve 40 counter-clockwise ninety degrees from the position illustrated in Figure 4. This will permit air to pass from the cylinder 35 through the port '43 and the check valve 45 into the pipe 39 and through the valve 40 and the pipe 42 to the exhaust. Piston 34 will therefore descend and the valve 46 will uncover the end'of the pipe 44 and then air may pass from the cylinder 35 through the pipes 44 and 39, valve 40 and pipe 42 without going through the check valve 45. The downward motion of the piston 34, when the pressure of the air beneath it is released, is caused by the weight of the counter-weights 6 and 7, which pull upon the doors, tending to move them to closed position. The doors transmit this pull to the ropes 21 and 26 and so to piston rod 33. Thus the manipulation of the valve 40 can be made to either close or open the doors.

' of the groove 15 is not a square shoulder but is rounded, as illustrated in Figure 3. As

soon as the weights 12 have passed beyond the support of the springs 17, their weight will be sufficient to overcome the counter- -by the hooks 32 upon the piston rod 33 beweights 6 and 7 and so result in opening the doors. This they do by exerting a pull upon the ropes 21 and 26. The end of these ropes farthest from the doors is held stationary V cause the piston 34 is at this time in its lowest position, as illustrated in Figure 4. The pull of the weight 12 against the ropes 21 and 26 therefore results in opening the doors.

When the doors have been opened in this manual way, they may be closed by manipulating the valve 40. In order to do this the valve 40 is first placed in the position illustrated in Figure 4, which will cause the piston 34 to rise and will pull the weights 12 up until the heads 16 of these weights pass under the springs 17. lVhen the weights have reached this position, the piston 34 will have reached the top of its stroke. By then moving the valve 40 through a quarter turn counter-clockwise, as shown in F 'igure 4, the cylinder 35 will be connected to the exhaust and the piston 34 will descend, and in descending will permit the weights 6 and 7 to close the doors. During this closing the weights 12 will not act to retard the motion because they are now supported by the springs 17. If, when the doors have been opened by the manual process, it is desired to close them manually, this must be done against the force of the weights 12, but

the weights 6 and 7 assist in this action so that the closing is not difficult. 7

e are aware that numerous details of construction may be varied through a wide range without departing from the principles of this invention, and we therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

We claim as our invention:

1. In a pneumatic door operating device, doors, a piston, a flexible connection between said piston and each of said doors, weights fastened to said flexible connections, re- 0 leasable supports holding said weights whereby upon releasing said weights from said supports they will act upon said flexible connections to cause the doors to open.

2. In a door opening mechanism, -a weight, a groove in said weight, a spring secured to the door and adapted to beseat- .ed in said groove, a flexible connection extending from said weight whereby when said weight is moved so that the spring is forced out of said groove the pull of the weight will be exerted upon said flexible connection to open the door.

3. In combination, a door, a pair of vertical guides upon said door, a weight slidably mounted upon said guides, a groove in said weight having the upper edge thereof rounded, a spring secured to said door and adapted to be seated in said groove and means permitting the'pulling of said weight downward whereby said spring will slip out of said groove and said weight will then be free to exert its force due to gravity.

4. In combination, a door, a pair of vertical guides upon said door, a weight slidably mounted upon said guides, a groove in said weight having the upper edge thereof rounded, a spring secured to said door and adapted to be seated in said groove, and means permitting the pulling of said weight downward whereby said spring will slip out of said groove and said weight will then be free to exert its force due to gravity, a flexible connection from said weight, and a pneumatic device secured to the other end of said flexible connection whereby the door may be opened by the motion of the pneumatic device which acts by pulling on the weight. 7 p

5. In a pneumatic door opening device,

a source of airsupply, a connection from said source to a cylinder, a spring-controlled valve in said connection, a bypass around said spring-controlled valve, and a check valve in said by-pass.

6. In a pneumatic door opening andclosing device, a cylinder, a piston therein, a plston rod secured to said piston, a plpe leading to said cylinder, means for connecting said pipe either to a source of air supply or to an exhaust, a connection between said pipe and said cylinder, a valve controlled by the position of the piston rod for controlling said connection, a second connection between said pipe and said cylinder, a check valve in said second connection, said connection being uncontrolled by the firstnamed valve whereby upon connecting said pipe to said exhaust air will pass from said cylinder through said check valve until the piston rod reaches a position where said second-named valve opens said first-named connection. 7

In testimony whereof we have hereunto subscribed our naines in the presence of two subscribing Witnesses. A

JOSEPH N. HAYNES. BLANCHE K. HAYNES.

IVitnesses CARLTON H LL, JAMEs M. OBRIEN.

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