US848723A - Shut-off for oil-tanks. - Google Patents

Description

.PATENTED APR. 2, 1907.

J-. B. CARR. SHUT-OFF FOR OILYTANKS. APPLIOATION FILED JULY 19, 1906.

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rm; NORRIS PETERS co., WASHINGTON, D. c

hereinafter referred to.

UNITED STATES PATENT OFFICE.

SHUT-OFF FOR OIL-TANKS.

Specification of Letters Patent.

Patented April 2, 1907.

Application filed July 19.1906. Serial No. 326,876.

T0 017/ w/trim it near/y concern:

Be it known that I, JOHN B. CARR, a citizen of the United States, residing at Pemberville, in the county of Wood and State of Ohio, have invented a Shut-Off for Oil-Tanks,- of which the following is a specification.

This invention is an improvement in oiltanks, and relates more especially to the provision of an automatic device adapted for the purpose of shutting off the discharge-pipe when the surface level of the oil in the tank reaches a certain point.

The primary objects of the invention are to produce a strong and durable automatic shut-off device which shall be reliable and positive in its operation and can be readilyand conveniently applied to the customary type of oil-tank without alteration thereof.

Other objects and advantages of the invention will hereinafter appear in the specification, and what I claim as novel in the particular construction and arrangement of parts constituting the invention will be specifically set forth in the appended claim.

In the accompanying drawings, which form a part of this specification, Figure l is a side elevation illustrating the application of the invention, the full lines showing the parts in their normal position to discharge the con tents of the oiltank, while the dotted lines show the automatic device tripped to close the valve in the discharge-pipe. Fig. 2 is a detail sectional view, enlarged, of a support Fig. 3 is a side elevation showing a slight modification.

Like numerals of reference indicate like parts ,in all the views of the drawings.

1 designates the oil-tank, 2 the dischargepipe, and 3 the valve located in said discharge-pipe, these parts being of the usual construction.

In carrying out my invention the squared outer end of the stem 4 of the valve 8 has fitted thereon a lever 5, which is angular in shape to provide the projecting arms or members 6 and 7, and said lever is so connected to the valve-stem that when the valve is open the member 6 will extend at an upward inclination, while the companion mem ber 7 extends downwardly and rearwardly, as shown in full lines, Fig. 1. The arm or member 6 is shaped at its upper end to engage a shoulder or catch 8 at the outer end of a bent lever 9, the latter being adapted to hold the valve in its open position and against the action of a closing-spring, hereinafter described. The bent lever 9 is loosely pivoted on a pintle 23 at the upper end of a fixture or support 10, adjustably secured on the discharge-pipe 2 between the tank and valve. The fixture 10 has a depending portion which terminates in a socket 11 and eye 12, the socket receiving a bar 13, secured therein by frictional engagement and constituting a buffer or stop throw of the valve-operating lever 5.

The member 7 of the valve-operating lever 5 strikes the buffer 13 when the valve is turned to its closed position, and for the purpose of turning the valve automatically from an open to a closed position when the said operating-lever is released from the trip-lever- 9 a spring 14 is provided and connected to the end of the member 7 and to the eye 12 of the fixture or support 10. For this purpose I may employ either the coiled spring 14-. (shown in Fig. 1) or a plate-spring 15, as shown in Fig. 3, in which latter instance the spring is supported in a loop 16 on the fixture 10 and is connected at its ends by chains 17 to the member 7 of the valve-operating lever, the connections of the chains 17 being such that when the lever is thrown to the open position of the valve the plate-spring will be bowed or under tension sufficient to throw the lever to the closed position of the valve as soon as said lever is released. It will be understood, of course, that instead of a spring I may employ its equivalent-as, for instance a weight, the application of which will be readily apparent. d

From so much of the description it will be readily seen that when the valve-operating lever 5 is turned to open'the valve and is engaged by the trip-lever 9 the contents of the tank 1 will be discharged through the pipe'2 and that when said valve-operating lever is releasedby disengaging the trip-lever therefrom the spring will"ac t to throw the valveoperating lever and close the valve.

Of course the triplever may be operated manually; but in order to provide for an automatic operation thereof when the surface level in the oil-tank reaches a certain point I provide a float 18 upon the body of oil in the tank and connect the same by a chain or flexible connection 19 to the outer end of the trip-lever 9, said chain passing for limiting the over a guide-pulley 20, located at the upper edge of the tank. There is enough slack in the chain 19 so that the same will not operate on the triplever until the level of the oil in 5 the tank reaches a certain point-in the present instance a point slightly above the dis charge-pipe, as indicated in dotted lines in Fig. 1.

From the fore oin the o eration will be D D readlly understood, for as the Oll 1s d1scharged through the discharge-pipe the float will follow the fall of oil in the tank, and

when the slack in the chain 19 has been taken up the weight of the float will pull upon the trip-lever and release the same from the valve-lever 5, the latter being then tlnown by the spring to close the valve in the discharge-pipe. hen the tank is to be again filled, the valve is opened and held by the trip-lever, so that the automatic operation may be repeated.

The fixture or adjustable support 10 is prefer ably made up of two plates, Fig. 2, provided with half-round portions adapted to embrace the discharge pipe 2 and bar or buffer 13, respectively, said plates being clamped together on said parts by means of the bolts 21 and 22, as shown. The upper ends of the plates are cut away at their inner sides to receive the lever 9, which is pivoted on the pintle 23. It will be seen, therefore, that the support or future 10 can be adjusted on the discharge-pipe to properly locate the same with respect to the valve and its operating-lever, and of course the buffer-bar 13 can be adjusted in the support so that the valve will be properly closed when the member 7 of the lever is against the bufler.

As valves are usually provided with square-end stems, it is apparent that the de I vices hereinbefore described can be readily l and conveniently applied to the customary j type of oil-tank.

' Having described my invention, what I claim as new, and desire to secure by Letters j Patent, is-

j The combination with an oil-tank having a j discharge-pipe extending therefrom and projvided with a valve the stem of which is 1 squared at its outer end, of an angle-lever j provided centrally with a square opening by l which it is applied to the squared end of the valve-stem so as to provide members at the opposite sides of the latter, a supportingbracket adapted to be clamped upon the discharge pipe and comprising two similar plates and connecting-bolts, said plates embracing the discharge-pipe and forming a 1 tapered opening near the lower end of the bracket and a pair of ears at the upper end thereof, a wedge-shaped butler-bar removably engaging the tapered opening of the bracket, a trip-lever pivoted between the ears at the upper end of the bracket and adapted to detachably engage one member of the j angle-lever, and a compression-spring connected to the other end of the angle-lever and to the supporting-bracket; together with a float located in the tank, a guide at the upper edge of the tank, and a flexible connection extending from the float over the guide and connected to the trip-lever, as herein shown and described.

In testimony whereof I have signed my 1 name to this specification in the presence of t two subscribing witnesses.

JOHN B. CARR. Witnesses:

j C. R. GERDING, l E. J. HERMAN.

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