US757297A - Refrigerating-machine. - Google Patents

Description

PATENTED APR. 12, 1904.

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J; b. GODSMANN. REFRIGBRATING MACHINE.

APPLICATION TILED OUT. 8. 1903.

N0 MODEL.

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M w 7% j eego in the county of Cook l fe: semen Patented. Ami 1964 JUSTUS C. GOOSliiAllN, OFiJHICAlf-ii), KLLTLNOIS.

eeeeieeemwie meomoien EEPECIFICAT-IQN forming;

To did/05mm :51 may concer'n: Be ii; known fillet I, Josrvos C. citizen of the Umiecltltefies,

Goosmzms, residing ee Chienci' State of lilinoisi, hove inven t-ecicertain new and useful Improvements in. Refrigerating-Machines; am i do hereby declare the following to be a foil, clear, and exact; description of the invention, such as will enable others skilled in the art; to which it epperteins to make and use the same. My inventionrelaies to novel construction in e zfefi'ig'eretirigsnoohine, and more perticw lei'ly to devices for saving escaping gas leaking through the stuifing-box and returning some ineo'tlie system, the object being to pro-- Vide simple and efiicicnt devices of this chew ester; and it CDZlSlSiJS in the features of eensanction and combinations of ps -es hereinafter fully described andcleimmi.

The my invention, show ehe'siuhing-box of. a re frigeroting or ice machine end my devices for saving the escape gas in central longiiuclinol section. 7

My present invention is an improvement upon the device forming subject of Letters latoot No. 719,460, granted iao me on February 3., 1903, in Whieh the eseepogas-controlliog means are controlled by the pressure of the oil fed to like stofiing-loox. In my present inveniion the escape-gas-eonirolliog devices ere en tirely independent of lake iubricoting means, oi as enabling me to regulate the pressure of each Wiilllfllli) elfecting the other.

The swing-box A, tlii'oizeh which the pieton-rod B passes, is provided "with the snow lei oil-chamber U, which is fed by a pump l), s constant circulation being maintained l3 moons of a. return-pipe E, leading from said chamber 1 to the oileeok l emithe pressure of said oi! controlled by a valve G interposed in said pipe E in so. obvious manner. Between said annular obi-amber C and the cylinder P an annular gee-chamber I, receiviiig the gas escaping from the cyiiniler H and said chamber 1 is connected bye pipe 3 with the upper end av cylimlei" K. in said cylinder K is 22. pissou L and hollow trunk-valve M, connected together by e piston iocl ll Said valve M controls the goo l'iiowmii' U, which is connect-- accompanying drawings illusti'eiing' part of Letters Patent No ?,39'3} defied April 1 2, lime. Application filed. October 8, 1903 I Serial No, 175,316. (1% model.)

. with heavy liquiii, such oil. The pistonrod V of said pision 'i is connected so its upper end with a lever W, pivotelly mounted at one end on an arm of the casing of said cyi inflers S and K and carrying a longitudinallyecljustsbie Weight X sin its free end, said weieht exerting its to neid the letter at the lower limit of its movement, and through the mecliomoi the thezem said passage U end 'tlieoil contained. weighe'elso serves to hold said. piston L at the upper limit of its moeemene, so that said valve M covers sold biow-ofi O". The

seicicylimler and each connection pressure onssid piston T which, togetl'ier position of said Weight on said lever W" obviously deem-mines the pressure required to 10 ton L to depress see; to cause blow-- off O to be uncovered. The escepioq gas collects iii-said chamber 1, pipe FL ori cylindex K, and when the pressure of said-gee has attained acerteizi point she blow-oi? U is obviously uncovered into the chamber or pocket Q, whence said gas passes into the cylinder H es soon as the the pressure in said eod'of said cylindez' is less time the pressure in said cliember Q,

as will be obvious I It is essential that the escaping should be maintained at e high pressure, for the reason that this serves in iiseii to pi'e-f vent excessive escape and aids in maintaining a definite compressioc-pressore in the cylin- H, sod, further, it prevense the excessive flow of oil. which migl'it O'iijlBFWlSfi final its Way into eeiel cyliz'ider, so the-i; the oii and escape gas serve as checks on each other, the oil seal formed ogy said. annular chamber (3 serving to prevent escape of and one seal like wise sewing io prevent an excess or" oil entering" the cylinder ll. I

To enable the escope-ges pressure to be properly controlled, 1 provide a pressuree exerted on the upper face of mixevioio and such gas eseepcs' a piston in said other cylinder, a fluid-pres gage Y on the pipe J, which indicates the pressure and enables the weight X to be adjusted to the proper 'iosition, such weight being heldat any desired point on the lever W by means of the set-screw Z.

.1 claim as my invention-s- 1. The combination with the compressorcylinder and stufiing-box oi a refrigerating- -machine, an escape-gas chamber in said stuffing-box, an escape-gas chamber having valvecontrolled connection with said cylinder, and connection between said escape-gas chambers, of two dilierential cylinders, one of which is interposed in said connection between said escape-gas chambers, a piston-valve'in said cylinder controlling said connection, a piston in said cylinder controlling" said piston-valve,

sure passage connecting said cylinders and serving" to transmit motion from one piston to the other thereof, and a weight bearing on said last-named piston to hold same at the lower limit of its movement against the action of the escape-gas pressure and hold said piston-valve in position to cutoff the connection between said escape-gas chambers, substantially as described.

2. In a refrigerating-machine, the combination with the co mpressor-cylinder and stutting-box,of an escape-gas chamber in said stuffing-box, a pocket adapted to receive the escape gas from said stuiiing-box chamber, and valve controlled connection between said pocket and said compressor-cylinder, oi? a cylinder connected with said stufling-box chunk her, a piston therein, connection between said cylinder and said poclet,a piston-valve 1n said 1 cylinder connected with said piston and con-' trolling the connection between said cylinder and said pocket, a fluid-pressure chamber on the other side of said piston, a second cylinder connected with said fluid-pressure chamher, a piston in said cylinder, a lever pivotally mounted at one end and carrying aweight at its frec'end, and connection between said last-named piston and said lever ad jaccnt the pivot of the latter, said lever being adapted to bear upon said piston to control the pressure in said fluid-pressure chamber and thereby control the movements of said first-named piston by the action of the escape-gas pres;-

sure, substantially as described.

3. In a ret'rigcrating-machine, the combination with the compressor-cylinder and stuii ing-lmx, of an escape-gas chamber in said stul'iing-box, an escape-gas-receiving chamber having valve-controlled connection with said cylinder and connected with said stufiing-box chamber, a valve-chaml. er interposed in said connection, a flnid-pressurc-actuated pistonvalve in said chamber controlling said conncc tion and actuated in one direction by the escape-gas pressure, fluid-pressure devices actuating said piston-valve against the action of said escape-gas pressure, and means exerting a constantload on said last-named fluid-pressure devices for controlling the esczmc-gas release/pressure, substantially as described.

In testimony whereof I afi'ix my signature in presence of two Witnesses.

' JUS'JTUS C, (:iOOSMANN.

iiitnesses;

, RUDOLPH TM. Lo'rz,

F. F. Wilson.

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