US2331373A - Liquid discharge appliance - Google Patents

Description

F, A CAMPBELL LIQUID DISCHARGE APPLIANCE Filed sept. 27, 1941 5 sheets-sheet 1 www Freefo-k Nom Campbell Oef. l2, 1943. F, A CAMPBELL 2,331,373

LIQUID DISCHARGE APPLIANQE yFiled sepi. 2v, 1941 s sheets-sheet 2 Fredelck Alon @um pbe Il.

'NW-Nvo@ (L @WML Oct. 12? 1.943. F. A. CAMPBELL 2,331,373

LIQUID DISCHARGE APIILIANCE Filed Sept. 27, 1941 5 Sheets-Sheet 3 Freden'ck QnCampbeH .INVENTora ou. 12, 1943. A, CAMPBELL `2,331,373

LIQUID DISCHARGE APPLIANCE Filed sept. 27, 1941 5 sneet's-sheet 4 winx-rota (5,1 (Wk.

Of- 12 1943. F. A. CAMPBELL LIQUID DISCHARGE APPLIANCE Filed Sept. 27, 1941 -5 Sheets-Sheet 5 Patented Oct. 1.2, 1943 LIQUID DISCHARGE APPLIANCE Frederick Alan Campbell, Langley, England, as- `signor of one-half to Fisher & Ludlow Limited,

Birmingham, England Application September 27, 1941, Serial No. 412,591 In Greatl Britain November 22, ,1940

z claims; (c1. 299-57) This invention relates to a liquid discharge appliance of the kind wherein the liquid passes through a plurality of tubes which can be extended telescopically by hydraulic pressure.

The appliancev is primarily intended for lfirefighting but it can be used for horticultural purposes or fory spraying buildings.

The object of the present invention is to provide a formof apparatus vwhereby a discharge of liquid at a high level can be obtained in a minimum of time and with a minimum of effort.

A further object of the present invention is to provide a device which can be cheaplyV manufactured and assembled mainly from lengths of standard section tube.

Referring to the drawing:

Figure l is a view in side elevation showing one form of the apparatus with the liquid discharge tubes in their contracted and lowered position. I

Figure 2 is a plan view.

Figure 3 is a view in side elevation showing the liquid discharge tubes in the contractedbut raised position.

Figure 4 is a sectional`view on line 4-4 of Figure 3.

Figures 5 and 5A constitute a view in section taken through the mainvliquid discharge tubes showing them in the contracted position.

Figure 6 is a sectional view showing one end of the primary tube and the adjacent end of the secondary tube engaging therein in the extended position.

In the construction illustratedthe liquid discharge appliance 4is shown mounted upon the upwardly therefrom `is a bracket rcomprising two vertical members I6 suitably secured at the base and two inclined membersv |.1 secured to thebase at I8. Each member` I6( is secured to one of' the members |1 at. the top by welding. V e l i A cradle consisting of fourA channel section members 20, 2|, 22 and 23 and aconn'ecting tube 35 is pivoted on the cross shaft I9 which passes through bearings on the upper ends of -the members I6. Furthenvoblique stays 24 'extend between the tube 3 5 and-the end of.' the member remote from thel tube 35 andfurther oblique stays extend betWee'nthe-tube 35- 'and the Vend of the member 22 lwhich is remote fromf'the tube 35. 1 Y. j

The fourl members 2|), 2|, 22 'and 23 fare' `all of channel section and the stays 24 and 25 may be of anglel sectionor any other section that may be desired.

end of the strut member is flxeda nut 29 v in r t which screws a rotatable strut member 30 ha v` ing-a head 3|.1 f

"The lower endof thestrutmember 30 carries a bevel wheell 32 which is engaged by beveliwheels 33vmounted on the operating vshaft 34 provided on the vehicle. v f f 'n 1 On the upper surface of the vehicleltwo vangle section members 36 are provided. These extend across the chassis frame and they carry two pairs |2 pivoted on a horizontal axis as shown at I3. y

In the construction shown the frontr'axle 92 of the vehicle is associated with a forecarriage 93 having a turntable 94 so that the forecarriage can turn relatively to the vehicle frame.

The element I2 is provided with a pair of bars 95 pivoted on butt hinges 95.

i foldable into the positions shown in chain dot lines or they can be moved forwardly to the position shown in full lines. These bars are for use in manoeuvering the vehicle manually after it has been detached from the tractor vehicle.

At the rear part of the vehicle'and projecting lis 'I'hese bars are iis of bearings 31 in which the shaft 34 can rotate.

Pivotally mounted between the two adjacent bearings 31 is a'gear box 38 containing .the bevel gearing 32, 33. `This gearbox may be .pivoted by meansvof trunnions in thetwo adjacent bearings 31.

, The shaft 34 is provided with end portions v39 which' can beenga'ged by aremovable cr'ank 40 so that the rotatable strut member' 30 vmay be operated from either side of the appliance to extend the strut. 1

Normally the strut memberl 30 'rotates Yand the strut member 28 does notfrotate but movesaxially in relation to the member 3U to extend the strut. When the head 3| of the strut member3|| comes into contact with the end of the nut 29, furtherv rotation of the strut memberI 30 also drives the strut member 28 causing' it to turn in y the block 21 and thus continue the extension of the strut until the position shown in Figure 4 is reached.

The member 20 of the cradle is used to carry the primary tube 4| of the appliance. The member 20 is provided with a pair of seatings,42 engaged by the tube 4| and the tube is secured by external straps attached to the seatingsf u At its -lower Aend tlie'tube is provided with an inlet fitting 44 having a shank 45 to which a hose may be attached. Preferably the hose is provided With its own stop valve ,so that theY flow of liquid pressure may be controlled thereby.J

The fitting 44 is provided `with a valve seat 46j on which operates a non-return'valve 41 the stem of which is provided with a shock absorbing spring48.

'I'he pressure of the incoming liquid open.sthe valve and the valve prevents any back flow ofY liquid. y -The tubi-14| can beta length ofstandard con-4 struction tube andit has welded toits lower end a flangev 49 Whig-.his bolted to Ttheiiangeill of the inlet fitting Atyvthsuitable' Vpacking intervening. At its outer `endthe tube .4| has a iian'ge 5| welded to it and'it' provided with two stuing boitv members'f, 53..,whichcan be drawn together by means ofbolts 54. 1 y .2 L

The bolts 15.4.. carryfnutsfiti wlfiich are used to secure the.{stu'liingr` bogelenent 5g-.to the flange 4| with-suitable intervening packing. stumng. boxfelemenu 52 is provided witha Skil-ttl having two Yashaped notches, 5l.A i

I iurther, theprimarytube 4| is provided with two groups 58 and 59 of openings which are placedbetween two rings 60 ,secured to its extexficr: andwsecured to the peripheries of the rings 60` is Aa, sleeve; 6|, the space Withinl this sleeve forming part of the transfer passage; of the pri` mary tube.

; Thesecondary,tube-is` yshrnavn yat 62 and at its innerenddt is-tted with apiston |53V engaging theginternal wall of the tube4l. `'l'he piston G3 may be made of metaland one side of-fit 64 is of cupi-like; construction'receivingthe end of the secondary tube 62 is provided with a group of TheY exterior of. the secondary tube hasxed to it collar 8B onV whicharea pair of projections 69 adaptedV to 'co-operate with the notches 5l when the secondary tubeA isi extended.

Theiappliance maybe provided with: a. dischargedevice 'Il or other discharge'oriflce which maybe 1 of any `.known construction. Ifthe `.appliance comprises only the primary and secondary tubesthen the ldischargev device Illimaybe secured to the `outer end of thesecondaryftube but in the construction shown there is athird tube and thedischarge device is applied toythe outer end thereof. i -f As there is athrd tube in the construction i1- be drawn together by means of bolts T8 provided with nuts 8|] so that the element 'l1 can be bolted to the flange 8| welded to the end of the secondary tube.

Further, the secondary tube is also provided with two groups of openings which correspond to the openings 58 and 59 of the primary tube. The groups of openings in the secondary tube are shown at 'l2 and 'I3 respectively and they are enclosed by a sleeve 'i4 secured to the peripheries :of two rings l5 and IG secured to the exterior of the secondary tube.

The inner'end of the third tube 'il is provided with a pistonv82 which is constructed similarly to AAcn lthe piston E3nbut diiers from it in that it is 'provided witha small hole 83.

The purpose of providing this hole is to allow the liquid in the thirdtube 'ii to drain into the secondary tube when it is desired to allow the appliance to contract. If this hole 83 were not provided it would benecessary to provide other means for draining away the liquid in the third tube. p

The primary tube is provided with a primary drain pipe 8d, having a cock 85 and a secondary drain pipe d having a drain cock 3l. The provision of the. secondary drain pipe and cock is necessary vbecause there is no opening in the piston E3. 4

The third tube 'H isY provided with a collar 83 having projections 89 which co-operate with the notches Si) in the skirt 9| of the stufiing box element T1 on the end of the secondary tube thus preventing the third tube from turning on its own axis when extended. n

The third tube '1| is, of course, guided and supported in the secondarytube 62 by the piston 32 and the s tuhng box elements 'l1 and 13.

The three telescopic tubes are moved and retained in their extended position by the water pressure entering at 45, the pressure acting on the underside of the piston 63 and moving it into the position shown in Figure 6. The liquid then iiows'through the ports 58 and the transfer pasage within the sleeve 6| and the ports GT into the secondary tube and acts upon the underside of the piston 32 causing it to slide outwardly until the ports 92 in the third tube receive the liquid from the transfer ports 13 in the secondary tube. The liquid then passesupwardly along the third tube H until it reaches` the discharge device 1d.` Y. y i

When it is desired to contract the apparatus the stop valve associated with the hose is closed and thedrain cocks 854 and 87 are opened.

A After it `has beenv contracted the apparatus canbe lowered on theV vehicle'by operating one lustra'ted, the secondary tube at its outer end is provided withistulng boxl elements Vwhich are similar to those described in'conne'ction with the outer end of the primary tube and arey shown at' lfand 18. "These stuffing box 'elements can What I claim then is:

l. Aliquid discharge appliance comprising a plurality of4 telescopically extensible tubes, ncluding a; primary tubehaving a liquid'iniet connectien; a non-return valve and a discharge cock, a secondary tube slidably mounted in the primary' tube, a pistonon the end of the secondary tube Within the primary tube and engaging the Wallofthe primary tube, and a stop for limiting outward sliding movement of the secondary tube dueto pressure of liquid in the primary tube acting on the piston, said primary tube having a transfer port uncovered by the piston when the secondary tube is fully extended, said transfer port being formed by providing at least two axially spaced openings inthe wall of the primary tube, avpair of rings on the exterior of the laamxra Y 3 said tube, one ring beingxed thereto at one side of both openings, and the other ring being fixed thereto at the opposite side of both openings, a sleeve secured to the peripheries of the two rings, said secondary tube having'a liquid inlet port in its side, said transfer port communicating with said liquid inlet port when the secondary tube is fully extended so that liquid pressure on the piston then keeps the secondary tube fully extended and liquid then flows through the transfer port and liquidinlet port into the secondary tube, said secondary tube having a liquid discharge orice.

2. A yliquid discharge appliance comprising a plurality of telescopically extensible tubes, including a primary tube having a liquid inlet 4 connection, a non-return valve and a discharge 170 ment of the secondary tube, a skirt on the stuffing box, and an inclined sided projection on the collar and a correspondingly shaped notch in the skirt of the stung box for positioning the secondary tube angularly around its axis when 15 fully extended. f

` FREDERICK ALAN CAMPBELL.

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