US298680A - Lingtow - Google Patents

Description

(No Model.) l

E. B. BLLINGTON.

HYDRAULIC ELEVATOR.4 No. 298,680. A 'PatentedMayl 1884.

N. PETERS. Pnoro-umognpmf, wnnhingxm. D. C.

'Unirse @rares Partnr Ottieni.,

EDVARD B. ELLINGTON, OF CHESTER, COUNTY CF CHESTER, ENC-LAND.

HYDRAULHC ELEvAi-oa.

SPECIFICATION forming part of Letters Patent No. 298,680, dated May 13, .1884.

Application filed Jnlyl, 1831.

To @ZZ when?, it may concern.'

Be it known that I, EDWARD BAYZAND EL- LINGTON, a "citizen of England, residing at Chester, in the county of Chester, England, have invented an Improvement in Hydraulic Lifts, (for which I have obtained a patent in Great Britain, No. 5,149, bearing date December 9, 1880,) of which the following is aspeciication.

This invention relates to improvements in hydraulic elevators or lifts, and it consists in the combination and arrangement of parts hereinafter fully described, and particularly pointed out in the claim, reference being had to the accompanying drawing, in which the ngure represents an elevation of a hydraulic elevator or lift embodying my invention, some` of the parts thereof being in section.

The vertical lift-cylinder number l contains the lift-plunger 2, which latter carries at its upper end the carriage or car 3, these 4parts being suitably constructed for the conditions required. The upper portion of the lift-cylinder connects by a pipe, 4, with the upper portion of a fixed tube, 5, the ends of which are closed, except that the reduced trunk 6 of an elongated cylindrical piston, 7, works through its upper end. The piston ,7 Works through thelower end of a vertically-supported receiver, S, composed of a tubular cylinder closed at its upper end, said receiver connecting intermediate its ends with a branch pipe, 9, for communicating with a water-supply pipe, 10, which leads to an elevated accumulator or water-reservoir, or other source for supplying water under pressure. The branch pipe 9 connects with a suitable casing, 11, having a water-discharge tube, 12, and inclosing a cock or Valve, 18, which@ is connected to a pivoted lever, 14, operated by a cable, 15, running upward through the elevator carriage or car, and the water-supply pipe 10 connects with the valve-casing, and also with the pipe 4, which connects the lift cylinder and fixed tube, a valve, 16, being provided in the supply-pipe, at some suitable point between its connection, with the pipe 4 and the valve-casing.

The construction of the valve-casing and the cock or valve and the manner of operating the latter are not material, and can be va- (No model) .Patented in England December 9, 1880, No. 5,149, and in France April 5, lSSI,

| riously modified, it only being requisite to provide some kind of a cock or valve, which can be operated so as to close the dischargetube 12 and throw the supply-pipe 10 into communication with the branch pipe 9, leading to the receiver, orto close communication between the said supply-pipe and branch pipe and open communication between the latter and the discharge-tube 12. As three-way cocks capable of effecting the above mentioned results are well known, I do not consider it essential to illustrate any particular construction thereof.

In order to supply the required amount of water to ll the tube 5, the valve 16 is opened to throw the water-supply pipe 10 into communication with pipe 4, which effects the supply of water to the tube, after which the valve 1G is closed and remains so. Other means for supplying a column of water to the lift-cylinder and fixed tube could be resorted to; but that described is simple, and accomplishes the purpose in an effective manner. The column or quantityof water in the cylinder 1 and tube 5 never varies, but in .the action of the apparatus is simply forced from the tube into the cylinder to raise the lift-plunger, and when the latter descends, such column of waterpasses back into the tube. When the cock or valve 13 is actuated to throw the supplypipe 10 into communication with the branch pipe 9, a column of water Will be supplied to to descend, and with it the trunk 6, the latter forcing the water from the tube 5 into the cylinder, thereby causing the lift-plunger 2 to rise. It will be evident that as the piston 7 descends a gradually-increasin g water-column acts on it in the receiver, and as such descent ofthe piston proportionally raises the liftplunger, it will be obvious that the water-column, acting on the piston 7, will vary according to the greater or less protrusion of the lift-plunger from its cylinder, so that the increasing pressure on the piston, due to the increasing column of water above it, compensates the increase of weight of the lift-plunger, due to its greater protrusion from the cylinder.

If the carriage or car has been lifted in the manner hereinbefore explained, and it is dethe receiver, which causes the piston 7 therein IOO sired to lower the same, the valve 13 is operated to throw the branch pipe 9 into communication with the discharge-tube 12, whichk relieves the piston of the pressure from the accumulator orother source of water-pressure supply, and the lift-plunger will at once begin its descent, causing the water in its cylinder to iiow back into the tube 5 and elevating the trunk G and piston 7. As the piston rises it displaees the column of water in the receiver, and causes it to gradually ilow off through branch pipe 9 and discharge-tube 12, and hence the column of water is gradually lessened as the protrusion of the lift-plunger from its cylinder becomes less, thus counterbalancing the plunger and its carriage or ear.

The discharge-tube 12 will in practice lead to a sewer or some other place for carrying` oil' the discharge-water, and the piston and its trunk, as well as the lift-plunger, will work accurately in stuffing-boxes, which provide tight joints for the parts.

By my invention it is impossible for the can riage or car to fall suddenly, and thus endanger life, and I provide simple but eiicient means whereby the invariable weight of the lift-plunger and car, as well as the variable weight thereof resulting from a greater or less protrusion of the lift-plunger from the cylinder, is compensated with out the use of weights, ehains,`and pulleys.

Having thus described my invention and the best means I know'of carrying` it out in practice, I hereby declare that I make no general claim to counterbalaneing the plunger and car of a hydraulic lift by hydraulic pressure in substitution for weights with their chains and pulleys; nor do I claim interposing between the lift-cylinder and the source of pressure an intermediate cylinder or cylinders with pistons or plungers so arranged and operating that the same liquid is made to iiow to and from the lift-cylinder without supply i'ronlthe source of pressure or discharge to the drain or escape; but

I claim- The combination of a vertical watertube, a receiver, and a differential piston interposed between the cylinder of a hydraulic lift and the source of water-supply, whereby the column of water acting on the said piston increases proportionally to the protrusion of the plunger from the lift-cylinder, substantially as described. l

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this th day of June, A. D. 1881.

ii. n. nnLiNeroN.

Witnesses:

HAROLD IMRAY, CHRIS. BERKLEY HARRis,

17 Gracecnwch Street, London.

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