US565424A

US565424A - Automatic stop-valve

Info

Publication number: US565424A
Authority: US
Publication date: 1896-08-11
Anticipated expiration: 1913-08-11

Description

, t 8 e h s W w h S 3 R E L D T E B A H q d 0 M O w AUTOMATIC STOP VALVE.

Patented Aug; 11, 1896.

(No Model.) 3 Sheets-Sheet. 2.

H. A. BEIDLER.

AUTOMATIC STOP VALVE.

Patented Aug. 11, 1896.

UNITED STATES PATENT @rrrcn.

HERBERT A. BEIDLER, OF CHICAGO, ILLINOIS.

AUTOMATIC STOP-VALVE.

SPECIFICATION forming part of Letters Patent No. 565,424, dated August 1 1, 1896.

Application filed January 13, 1892. Serial No. 417,913. (No model.)

To all whom it may concern:

Be it known that I, HERBERT A. BEIDLER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Automatic Stop-Valves, of which the following is a specification.

My invention relates to improvements in automatic stop-valves for hydraulic elevators and similar purposes; and its object is to automatically arrest the movement of the elevator-car at predetermined points, in its ascent and descent, near the top and bottom of the well, independently of the position of the valve that controls the flow of fluid to the motor, and avoid accidents which may result from the negligence or want of skill of the operator or the derangement of the valve-controlling mechanism. I accomplish these obj ects by means of themechanism shown in the accompanying drawings, in which like letters and figures of reference are used to designate similar parts throughout.

Figure 1 is a top View in perspective of my invention. Fig. 2 is a side elevation of my invention in connection with the main powercylinder and mechanism for hoisting and lowering the elevator-car. Fig. 3 is a vertical longitudinal section of the main valve and automatic stop-valve with their proper ports and pistons. Fig. atis an end view of the extension of the main valve, which is connected with the exhaust. Fig. 5 is a cross-sectional view of the inlet supply-chamber, in which is shown a sectional View of the lining of the extension of the main valve, which passes through said inlet supply-chamber, on the lines 00 y of Fig. 1. Fig. 6 is a cross-sectional view of the piston in the extension A of the valve on the lines 2 2', Fig. 3. Fig. 7 is a plan view of the open end of the main power-cylinder. Fig. 8 is an end view of the main power-cylinder, and Fig. 9 is a detail crosssectional view of the piston of the main powercylinder carrying one of the collars which engages with the cam that operates and controls the movement of the pistons in the stopvalves.

Letter A represents the main valve, which contains the reciprocating pistons and connections which control the passage of the fluid from the inlet-supply to the main powercylinder, and which open and close the passage-ways and chambers leading to the exhaust or outlet pipe. It also includes and embraces the extensions A A, in which are located, respectively, the reciprocating pistons O and N.

B is an opening connecting the chamber of the main power-cylinder, through the chambers F and G, respectively, with the inletsupply D and the exhaust C.

E represents the flange of the inlet supplychamber, of which Fig. 5 is a cross-sectional view.

A is an extension of the main body of the valve, forming, in connection with the main body, the chamber H, connecting with the exhaust C. This extension is provided with the usual brass or non-corrosive lining m, provided with a series of elongated openings op posite the port of the exhaust 0. Located within this extension A is the hollow or chain bered piston N, constructed of suficient length to cover and close the port of the exhaust C and the belt 32. This piston is surrounded by a groove 33, in which fluid may pass and remain for lubricating purposes. The piston is provided with openings 1) I), through which the fluid may readily pass into the chamber M and thus equalize the pressure on the opposite sides of the piston. The piston-rod K passes out through the head of the extension A, which is provided with the usual packing-box and forms connections at 15, as hereinafter explained.

A is an extension of the opposite end of the main body of the valve, forming, in connection with the chamber F in the main body, the chamber LF. This extension is in like manner provided with the usual brass or noncorrosive lining Z, having a series of elongated openings opposite the inlet supply-port D. Located Within the chamber of this extension A is the hollow or chambered piston O, constructed of sut'iicient length to cover and close the port of the inlet D and the belt I. This piston is surrounded by the grooves 13 13, in which fluid may pass and remain for lubricating purposes. The piston is also provided with openings and passages a a a o,through which the fluid may easily pass into the chamber L, and thus equalize the pressure on opposite sides of the piston. The pistonrod J passes out through the head of the extensions A, which is provided with the usual packing-box and forms connections at 14, as hereinafter explained.

Within the chamber F is located the double valve 2 and 3, adapted to meet and tit the respective valve-seats 4 and 6. This valve is connected by the stem or piston P pivot-ally at p with the lever S. WVithin the chamber G is located a second double valve 7 and 8, adapted to meet and fit the respective valve-seats 11 and 12. This valve is connected by the stem or piston Q, pivotally at q with the lever S.

The lever S carries the weight V and is pivotally connected at t with the strap or bar T, which connects pivotally at t with the rocking lever U, which is supported piv0tally at u by a permanent standard R. The lever U is connected at its respective ends by means of cords, cables, or other means with the operating-lever in the elevator-car.

The respective ends of the piston-rods J and K are connected by the bar 16, and each is provided with screw-thread and nut or other well-known means at the point where connection is made with the ends of the bar 16, whereby the precise location and movement of the pistons O and N in the cylinders of the extensions A and A can be controlled and limited.

The bar 16 is supported in guides 17 and 18, attached to the respective flanges of the ends of the main valve, or they may be attached to any permanent supports in connection, therewith.

Letter B represents the main power-cylinder, in which is located the piston 30, to

which is attached the piston-rod 31. Upon the exterior flange of the main cylinder, Fig. 8, are attached

boxes

24 and 26, having bearings for the rock-shaft 25. Rigidly attached to this rock-shaft is a cam 27, having bifurcated projections extending in opposite directions. Attached to the other end of this shaft at the point 23 is a crank-arm 21, which connects pivotally at 22 with the rod 20, and i this latter rod connects pivotally at 15 with the bar 16.

Located rigidly upon the piston-rod 31 at predetermined points with reference to the stroke of the piston and height of the elevator-shaft are two collars 28 and 28, each having an arm or projection carrying a wheel or idler 29 of suitable size to engage with the bifurcated projections of the cam and pass between them during the outward and inward stroke of the piston.

The construction of my invention having now been described, its mode of operation is as follows: In Fig. 3 the rocking lever U is in its normal position, when both inlet and exhaust ports are closed or cut off from the port B, that leads to the main power-cylinder B, and the elevator-car will remain at rest. lVhen the rocking lever U is operated so as to elevate the point t of the lever S, the opposite end q will be fulcrumed upon the valvestem Q and the valve 2 and 3 will be opened and the fluid can instantly flow from the inlet supply-pipe D into the chamber F and thence to the port B, leading to the main power-cylinder but it cannot pass into the chamber II and thence to the exhaust-port O in consequence of the valve 7 and 8 being closed upon the respective valve-seats. A reverse movement of the rocking lever U brings it back to its normal position. If this reverse motion is continued until the point t of the lever S is depressed, the opposite end will be fulcrumed on the valve-stem P, which has closed the valve 2 and 3. The valve-stem Q, will be elevated and will open the valve 7 and S. In this condition the elevator-car will begin to descend, and, the fluid from the supply-port being cut off, that in the main power-cylinder will escape into the chamber H and thence out through the exhaust'port O. The weight- V on the lever S tends to restore that lever to its normal position and also aids in keeping closed one or the other of the valves 2 or 7 8, alternately, as the rocking lever U is operated.

It will be seen that the pistons O and N, located, respectively, within the cylindrical chambers of the extensions A" and A of the main valve, are rigidly connected by means of their respective rods and the bar 16, so that they reciprocate as one piston having two diaphragms with a chamber between, closing in one movement the port of the inlet supply-pipe and opening that of the exhaust,and operating vice versain the reverse movement. Precisely the same united action could be elfected by connecting these two pistons by an interior stem or piston-rod passing centrally through openings in the partitions of the main valve from one to the other. It will thus be seen that these two pistons N and 0 act hydraulically as two independent stop-valves, one of which controls the inlet-port and the other the exhaust-port; but, by reason of the fact that they are connected by a yoke or other mechanical means, two advantages are gained, to wit: first,the opening of one valve by the automatic mechanism will simultaneously close the other valve, and the closing of one valve will likewise simultaneously open the other valve, which function is Very desirable, in that it permits the working piston in the main cylinder to immediately reverse its stroke when it is desired, and consequently permits the travel of the cage to be immediately reversed at either the top or bottom limit of travel; second, the two piston stop-valves being thus connected to hydraulically act simultaneously, but reversely, can yet be actuated by a single set of devices for producing the automatic action, which devices will now be set forth.

The collar 28 is located upon the piston-rod 31 at a point indicating the limit of outward stroke of the piston when the elevator-car is ward.

ascending. As it is carried forward in the movement of the piston the idler comes in contact with the lower prong or projection 34: of the cam 27 and forces it outwardly, rocking the shaft 25 and operating crank-arm 21 and forcing the rod 20 and the bar 16 back- This movement of the bar 16, which is connected with the piston-rods J and K, operates to force the piston 0 forward, closing the port of the inlet supply-pipe and at the same time carrying the piston N'to a position fully uncovering and opening the exhaust-port. The fluid supply being thus cut off and the exhaust-port open, the upward movement of the elevator-car is arrested.

The moment the extreme limit of stroke of the piston has been reached and the piston begins to return, the idler 29, which has passed in between the upper and lower prongs of the cam 27, will also begin to recede and bear upon the upper prong 35, and will restore the cam and the stop-valve, consisting of the piston N and O, to normal position.

It will be observed that in its normal position (shown in Fig. 3) the two pistons constituting the stop-valve are so adjusted that both the inlet supply-port and the exhaustport are uncovered, leaving the main valve to operate independently. It will also be seen that the safety-stop valve operates independently of the main valve.

\Vhen the piston of the main motor makes its return movement (the elevator-car being on the descent) and it has reached its limit of stroke, the idler 29 upon the collar 28 engages with the opposite projecting prongs of the cam 27, and, in the same manner as above described, causes the stop-valve, consisting of the pistons N and O, to move in an opposite direction and close the exhaust and open the inlet port, thereby arresting the movement of the piston of the main motor and the descent of the car.

It is evident there may be many changes and variations in the construction and arrangement of parts of my invention without departing from the spirit thereof, and I do not limit myself to the precise construction and arrangement shown.

Having thus described my invention, what I claim as new, and desire to secure byLetters Patent of the United States, is-

1. The combination in a fluid-controlling valve for a motor, of a chamber therein provided with the usual waste-supply and motorcylinder ports, with a reciprocating valve clevice or mechanism within the chamber adapted to control the said ports, and a safety-stop within the valve adapted to close said ports when the piston of the main motor reaches its limit of stroke.

2. The combination of a main motor having a piston and piston-rod, said piston-rod provided with two collars arranged to engage with a cam, a fluid-controlling valve having a chamber therein and provided with ports, a reciprocating piston within the chamber; a

safety-stop within said valve adapted to close said ports, means connecting said cam with said safety-stop whereby the movements of the piston of the main motor operate said safety-stop, and open or close said ports of the fluid-controlling valve at the limit of stroke of said piston and independently of the operation of the main valve; all substantially as shown.

3. In a fiuid-controllin g valve a main valve provided with ports and means for closing and opening the inlet supply and exhaust ports thereof a chamber extending in opposite directions from and within said main valve; one end thereof connecting directly with the inlet supply-port and the other end with the exhaust-port a double piston located within said chamber, united and held together by piston-rods having exterior connections with the piston of the main motor, whereby the reciprocating movements of the latter at the limit of its stroke may be communicated to said double piston within the extended chamber of the valve alternately opening and closing the inlet and exhaust ports; all substantially as shown.

4. In a fluid-controlling valve, a main cylinder provided with a port leading to the main motor and with chambers connecting respectively with the inlet and exhaust ports; extensions of said main chamber, A and A respectively provided with the ports 0 and D; the piston 0 provided with openings a, a, and a piston-rod J the piston N provided with its openings b, b, and a piston-rod K-a connecting-bar 16 and means connecting said bar 16 with the cam 27, the collars 28 and 28 adapted to engage with said cam, respectively located upon the piston-rod of the main motor whereby the movement of the said piston-rod of the main motor will communicate reciprocal motion to the pistons O and N; all substantially as shown.

5. In a fluidcontrolling valve, having a chamber within said valve and provided with ports, and a safety-stop, a hollow chambered piston provided with grooves in its outer periphery, and providedwith openings at, a, and a piston-rod whereby said piston can be operated to open and close a port within said valve and equalize the pressure of the fluid in the chamber in the front and rear of said piston; all substantially as shown.

6. The combination with the cylinder and piston of a hydraulic elevator, and independent inlet and outlet passages respectively leading to and from the cylinder, with two stop or safety valves, one for controlling the inlet-passage and the other the outlet-passage,mechanical connection between the two, whereby they may be operated simultaneously to respectively open one port and close the other; substantially as and for the purpose set forth.

7. The combination with a cylinder and piston of a hydraulic elevator, with two stop or safety valves, adapted to close different ports and mechanically joined to each other,

and appliances through which both of said valves are automatically actuated; substantially as and for the purpose set forth.

8. The combination with a cylinder and piston of a hydraulic elevator, of two stop or safety valves, each having its stem projecting beyond the valve-casing, a rod connecting such stems and appliances for automatically operating the rod alternately in each direction; substantially as and for the purpose set forth.

9. The combination with a cylinder and piston of a hydraulicIelevator, avalve-casing provided with inlet, outlet and cylinder ports, the cylinder-port arranged between the inlet and outlet ports, two stop or safety valves, respectively adjacent to the inlet and outlet ports, and in operative relation thereto, mechanical connection joining said two stop or safety valves, and appliances connected with the motor for automatically and simultaneously opening one valve and closing the other, or vice versa; substantially as and for the purpose set forth.

10. The combination with a cylinder and piston of a hydraulic elevator, of a valve-casing having the usual inlet, outlet and cylinder ports, of two stop or safety valves for re- HERBERT A. BEIDLER.

Vitnesses:

J. LAWRENCE GERRY, MARY R. CLARKE.