US1739951A - Feeding apparatus for chemicals - Google Patents

Description

Dec. 17, 1929. Pr DORSEY 1,739,951

7 FEEDING APPARATUS FOR CHEMICALS Filed May 13, 1927 Patented Dec. 17, 1929 A T STATES PATENT}, oFFrcE 7 PARMER DORSEY, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE IMPERIAL BRASS MANU FACTUBING COMPANY, or CHICAGO, ILLINOIS, .A'QORPORATION or ILLINOIS FEEDING APPARATUS non CHEMICALS Application filed Mav s; 1927. Serial No. 191,085.

My invention is concerned ,with certain new and useful improvements in feeding apparatus for chemicals, which I have shown as substituted for a fundamentally different apparatus having the same function in my application, Serial No. 525,566, filed December 29, 1921, for an acetylene generator, in which the feed'of the carbide is effected at'necessary intervals to maintain the desired pressure, by the'gradual rise'and sudden fallof a small gas bell through which all the gas being drawn from the generator must pass, the sudden fall being efiected by the sudden escape from the bell of the gas under pres sure contained therein when, the bell has been raised by the gas pressure high enoughto lift its open bottom from the sealing liquid necessarily. employed'and'in which it is' or the valve 19 is vibrated, so as to thereby inconstruction. while still- Fig. 1 is central vertical section through" the upper portion'of an acetylene generator to which my invention has been applied;

Fig. 2 is a central verticalsection through the controlling mechanism for the feed, but on a much larger scale; and

Fig. 3 is a detail on an enlarged scale, as

seen from line 3-3 of Fig. 2. a

10 is the generating chamber of the customary type containing water,into which the carbide is dropped from the carbide holder 11 occupying the upper'portion of the cylindrical top 120i the casing. Secured in one side of the casing beneath the carbide chamber 11 is a pressure regulator 13 containing a diaphragm opposed by a spring and acted on by the pressure of the gas in the generating chamber, so that the position of the rod 14 projecting therefrom and secured at its outer end to the diaphragmis controlled by the pressure of the gas in the tank 10. Thisrod 14 is pivoted at its outer end to the lever 15 fulcrumed at 16in a suitable bearing piece 17 connecting the lowerconical wall 18 of the carbide chamber with the lower end'of a cylindrical casing 12; The lever 15 I has pivoted in its lower end a mushroom valve 19 which cooperates with the'circular outlet for the carbide forming the lower end of the cylindrical bottom portion 18, and this valve 19 stands at a distance from the outlet opening which varies with the pressure of the gas in the generating chamber, and it will be'understood that the lower the pressure of the gas, the. wider the space between the valve 19 and the opening, so that thecarbide will escape in greater quantities each time crease the amount of gas generated and thus reuse the pressure. 'When the pressure is hlgh, the valve 19 stands closer to. the outlet so that les'scarbide can escape each time the- 'v valve 19 is vibrated. The valve-19 has se-" cured toits under side a rod 20 whichex tends through the short-pipe 21 let into the side of the cylinder 12 and connected to the T 22, which has the short pipe 23 screwed in its upperportion. The upper end of the pipe 23 is screwed into the boss 24' formed on the lower end of the chamber 25, the upper from by the outlet pipe 34 to the cuttingor ployed in connection with the generator.

' The apparatus thus far described is 'identical with that shown in my application,

in the customary manner, and is led therewelding tool, or whatever apparatus is em- Serial *No. 124,878, filed July 26, 1926, to; which reference is made for a fuller disclosure of the details of construction.

The outer'end of the rod 20 passes through the. eye 35, constituting the lower end of the vertical radii-36 extending up through the pipe no f 23 and into the chamber 25. The rod 86 has secured on the upper end thereof a piston 37,

which I have shown as conveniently fastened.

in place by being secured on the threaded upper end of the rod 36 and held in place by the nut 38. The piston 37. does -.not fit snugly enough to entirely prevent the passage of gas between it and the cylinder, and is loose enough so that it can fall freely when the pressure-ofthe gas beneath it is relieved.

For this purposev I employ the valve =89, thelower conical end of which cooperates with the conical seat 40 formed in the aperture 50 extending through the piston, vThe valve is thebracket 53 and held initsia'djusted pos-i tionby thelook nut 56-.

Toward the end of "the downwardgmov ment of the'piston I 37., the bottom of the valve Y 39 contacts with the bottomof the chamber I 25, so. that the continued downward movement of thepiston-causes the valve to beseated, and the 1 gas pressure to become aagain effectiveonthe under side ofthe piston, .anrlit is: also great enough .to ,hold, the valve seated until the piston-37, which is Araisedsomewhat gradually-dueto thelealrage around the edges.

thereof, has risen .to the desiredgheight, when the upper end of the valve stem 51 contacts with a suitable abutnient, which is prefen ably aset screw 5f7 threaded through the cover 26,. and secured ingany :desiredi adjustment by the lock nut 58 threaded thereon against the top :of. thecover. lbw-i111; be understood that. when the piston 37. rises until the, urpperendof the stem 51 contacts with the abutment 57 the valve" is opened against the pressure beneathirinaand the .gas "beneath it rushes rapidlythrough the ,passage 50, .ther'eby reducing the pressure beneathv thev piston so. that-the latter .is free to fall. and thus vibrate the r-0d some through it to mushroom valve 19 to cause'the feed. :To guide the valve,.I provide ita-bove the conical seatportion witlrthe vertical ribs 59 cooperating with the sides of the passage .50 to :center the valveduring its movements. 1

lVhile I. have-shown andcl-escribed .my Lin vention :asembodiedin-the form which Lat present consider bestaadapted to carry out its purposes, it will 'be'aunderstood that it is capable of modifications, and that I do not desire to be limited iin the "interpretation. of theirfolloaving claims exceptiis may benec'essitated by the state of the-prior ant;

- What I claim as new, and desire to secure by Letters Patent off the United-States'is:

'1. In an apparatus for generatingigas, the

combination with a holder for a dry chemical, of a holder for a liquid, a conduitthrough which the generated gas is delivered, mec-ha-o nism for feeding the contents from one holder to the other intermittently in small quantities, alcylinderin said conduit,& piston adaptedto reciprocate freely insaid cylinder and to be moved in one direction by the pressure of the gaspassing' through the conduit, a

valve in the piston held closed as it is-frnoved by thepressurefofthe gas, an 'abutment rigid- .ly secured within the cylinder in position to be'engag'ed' the'valve to open it at the limit of i tsmovement to release the pressure and permit the piston to return, and connections from. said piston to said .mechanism so that each time. thepiston isreeiprocated the feed isaefie'cted. r

.2. In an apparatus forgeneratinggas, the

combination with a holder for a dry'ohemi-eal, of a holder for a: liquid, a conduit throughv which the generated gas is'delivered, mechanism for feeding' theIcontentsfrom oneholder to the other intermittently in smallcquantities, a=c ylinderin said-conduinapistonadapted to reciprocate freely insaid' cylinder and-to be moved in one direction by the pressure of the gas passing -through theconduih a valve in the piston. held. closed; ,as it; Lis moved by the pres-sureof thegas, adjustable-means for. regulating the amount. QfJIlOVGIHBnhglVBn to nism for feeding th'econtents-fromone holder to the other intermittently in sm al l quantities, a vertical cylinder in-said conduitya piston adapted to reciprocate freely in sai cylinderzandto be lifted-by thepressure of-the gas passing through the conduit, a valve in the piston held closed as it is raised by the pressure of the gas, an abutment rigidlysecurred within the cylinder "in-position to he engagedi by the valve to open as: the limit ofv its upward movement to release the pressure and permit the piston'to fall bygravity, and

connections from said piston to said mechanism so that each time the, piston-is reciprm cated the feed is effected.

,4. In an apparatus-for generating ,gas, the combination with a ThOldBI' .for a dry chemical, of a holder fonaliqu-id, a conduit through which the generated gas is delivered,-

- mechanism-for feeding thecontents from one holder to the other intermittently in small quantities, a vertical-cylinderin said conduit, a piston adapted to reciprocate freely insaid v the valvestem to open it at the limit of its cylinder and to be lifted by the pressure of the gas passing through the conduit, a valve hav-' ing its stem extending upward through the 3 piston. and its head adapted to be held seated p 5 in the bottom of the piston by the pressure of the gas, an abutment rigidly secured With-v in the cylinder in position to be engaged by upward movement to release the pressure and permit the piston to fall by gravity, and connections from said piston to said mechanism so that each time the piston is reciprocated the feed is effected. I

In Witness whereof, I have hereunto set my hand this 29th day of April, 1927.

" PARMER DORSEY.

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