US623357A

US623357A - William evans

Info

Publication number: US623357A
Authority: US
Publication date: 1899-04-18
Anticipated expiration: 1916-04-18

Description

No. 623,357. Patented Apr. l8, I899. w. EVANS.

PNEUMATIC APPARATUS FOR RAISING LHIUIDS.

(Application filed m 21, 1898.)

(No Model.)

INVEN TOR y E/M with STATES Fries,

PATENT \VILLIAM EVANS, OF MANCHESTER, ENGLAND.

SPECIFICATION forming part of Letters Patent No. 623,357, dated April 18, 1899.

Application filed May 2'7, 1898. Serial No. 681,892. (No model.)

[0 (tZZ whom, it nut COR/0677b.

Be it known that I, WILLIAM EVANS, engineer, a subject of the Queen of Great Britain and Ireland, residing at 5 Clifford street, Eccles New Road, Salford, Manchester, in the county of Lancaster, England, have invented a certain new and useful Improvement in Pneumatic Apparatus for Raising Liquids and Closing Doors, (for which I have made applications in Great Britain, No. 25,781, dated November 6, 1897, and No. 7,616, dated March 30, 1898, and in Germany, dated March 28, 1898,) of which the following is a specification.

My said invention relatesto improvements in pneumatic apparatus for raising liquids and which may also be used for closing doors.

My improved apparatus consists, essentially, of a novel air-pump which may be actuated either by the foot of the operator or mechanically, as will be hereinafter fully described.

My improved air-pump, although applicable for various purposes, is principally intended for use in forcing up or raising beer, porter, and the like beverages from a cellar or other situation to a restaurant or hotel bar or the like.

The accompanying two sheets of drawings illustrate my invention more clearly.

Figure 1 of the drawings is a sectional elevation of myimproved pump broken in length for want of space. Fig. 2 is a plan View of the same. Fig. 3 is a modified form of pump.

The cylinder a is screwed or otherwise suitably secured to a cover 1), which may be secured to the floor by screws or bolts passing through the holes Z) in the cover 1) or by other convenient means. lVorking within the interior of the cylinder is a piston 0, carried by a suitable plunger d, the upper end of the plunger being provided with a foot-plate. The piston c is conveniently packed, so that on its descent it shall work fluid-tight within the cylinder (1, but on its ascending stroke will allow air to pass around its edges to the under side of the piston 0, so as to charge the cylinder with air for the next downward stroke. This is effected in the following manner: Upon the hollow plunger (Z I braze or otherwise secure a screwed ring (1. A piston-ring c is screwed upon the ring (1'', and

upon this ring 6 is disposed an annular ring of leatherfor other suitable resilient material, formed with a downwardly-curving projecting edge f. A washer f is placed upon the leather ringfian d a lock-nutf binds the whole to the ring d upon the hollow plunger (Z. On the downward stroke of the piston the compressed air within the cylinder will tend to force outward the curved edge f of the leatherfagainst the wall of the cylinder, and thus prevent leakage. On the up stroke of the piston the air which enters through the hole b in the cover I) can freely pass between the curved edge f of the packing-ringfand the wall of the cylinder a, the air-pressure tending to force the edge f of the packing-ring away from contact with the interior wall of the cylinder.

The bottom of the cylinder at is in the form of a screwed cap or cover 6, provided with a packing-ring g to form a fluid-tight connection between the cylinder and the cap g. The cap 9 is provided with an annular recess gio accommodate the curved edge of the packingring, so that the piston may be traversed to the bottom of the cylinder, and thus increase the length of stroke to the utmost capacity of the cylinder.

To the bottom cover 9 of the cylinder at I secure, by brazing or other convenient means, a metallic tube lb or auxiliary cylinder of smaller diameter, and the plunger d, projecting below the pistonof the cylinder at, is adapted to work within this tube. The diameter of the tube It is slightly greater than the plunger d, and the lower end of the plunger is provided with a packing-ring t', similar in construction to the packing-ring f of the piston c in the larger cylinder CL.

The packing-ring 'i is secured to the closed end of the plunger by means of a screw 1', The tube h is connected with the air-pipe j, leading to the cask or other receptacle containing the beer to be raised, by a union k or other suitable means. A fluid-tight connectionbetween the tube h and the air-pipe j is provided for by the packing-ring j, against which the end of the air-pipe is jammed by the union 70.

At the commencement of its stroke both the piston c and the packing-ring iat the end of the plunger (1 are at the top of their rering carried by the foot of the plunger (Z into the air-tube j.

Fig. 1 shows the piston c and packing-ring i at the lower end of the stroke. The back pressure of the air thus forced within the airpipe j, acting upon the packin g-rin g 2', carried on the lower part of the plunger d, causes the plunger to be automatically raised ready for the next downward stroke. Thus by a slight consumption or reduction of the air-pressure forced by the downward stroke of the piston 0 into the air-pipe j the plunger is always automatically raised, and the pump is thus always in position to be operated without any attention on the part of the operator.

' The improved pump may be varied in construction, as shown in Fig. 3. For instance, the auxiliary cylinder or tube h may be carried within the cylinder at The hollow plunger d instead of projecting below the piston o, as before, terminates at the point where it is secured to the piston. The tube h is disposed within the plunger d and is in connection with the air-pipej, secured to the bottom of the cylinder a. An annular space is left between the plunger d and tube h. The piston is provided, as before, with a packing-ring f, secured to the piston c by screws and a nut f The packing-ring f is provided, as before, with a downwardly-curved edge f and in addition an upwardly-curved edge f surrounding the tube h. On the downward stroke of the piston the'air is forced past the curved lip f surrounding the tube h, entering within the hollow plunger cl, and passing down the open top of the tube h to the airpipe j. The air-pressure thus raised within the air-pipe j, acting on the closed top (1* of.

the hollow plunger (1, automatically raises the same when released from the pressure of the operators foot, the curved lip f preventing the escapeof air. The piston c is shown in its lowest position within the cylinder at.

I declare that what I claim is 1., In combination, the cylinder, the plunger d, the tube 71, said plunger and tube being arranged one within the other, the piston connected with the plunger andworkin g within the cylinder and packing extending across the space between the plunger and tube, substantially as described.

2. In combination, the cylindelgthe plunger working therethrough, and having a piston in the cylinder, the tube It extending .from the cylinder and about the plunger and the packing carried by the plunger within the tube 71, substantially as described. v

In witness whereof I have hereunto set my hand in presence of two witnesses.

VILLIAM EVANS.

\Vitn esses:

JOSHUA ENTwIsLE, ALFRED YATES.