US823845A - Relief device and attachment for compressors. - Google Patents

Description

- No. 823,845. PATENTED JUNE 19, 1906 R. GONRADBR. RELIEF DEVICE AND ATTACHMENT FOR.OOMPRESSORS.-

I APPLICATION FILED JAN. 29, 1902.

' 5 SHEETS-SHEET1.

fzzrzzzur I No. 823,845. I'PATENTED JUNE 19,1906 I =11. GONRADBR. I

RELIEF DEVICE AND ATTACHMENT FOR OOMPRESSORS.

APPLICATION FILED JAN.29. 1902.

5 SHEETSSEBET 2.

. QWMM v No. 823,845. PATENT-ED JUNE 19, 1906.

- v R. GONRADE-R. RELIEF DEVICE AND ATTACHMENT PORROOMPRESSOIRS.

APPLIOATION FILED JAN. 29, 1902.

I 5 SHEETS-SHEET 3.

um um! umnmn w w,

R. GONRADBR. RELIEF DEVICE AND ATTACHMENT FOR. COMPRESSOR8.

APPLICATION FILED JAN. 29, 1902.

PATBNTED JUNE 19, 1906.

5 SIIBETS--SHEET 4.

PATENTED JUNE 19, 1906.

" v R .CONRADER.

RELIEF DEVICE-AND ATTACHMENT FOR QOMPRESSORS.

APPLICATION FILED JAN. 29, 1 902.

5 SIIEETSSHBET 5.

* rear/3r NAT ' and pointed out in the claims. I

UNITED sTArEs PATENT oFFIoE.

RUDOLPH CONRADER, 0F ERIE, PENNSYLVANIA. REL lEF DiEtllcE AND ATTACHM-ENT Fo comPRsssors,

To all whom it mag concern Be it known that L'RUDOLPHOONRADER, a

citizen of the United States, residing atv Erie,

in the county of Erie and Stateof Pennsyl-- vania, have invented certain new and useful Improvements in Relief Devices and Attachments for Compressors; and I do hereby de clare the following to be a full, clear, and ex-- act descri tion ofthe invention, such as will enable ot ers skilled in the art to Which it appertains to make and use the same.

thereof, as will be hereinafter fully described well understood. A

he ordinary purposes of'relief devices are The object of this invention, is tov rovide asimple and effective device of this c aracter.

-Where relief devices are so designed as to producea reduction of pressure at the compressor during the time that the relief device 1's 1n operation, it becomes necessary to provide some valve mechanism to prevent a ordinarily accomplished by the use of a check-valve. -Where the ordinary. checkvalve is used, it operates with each-pulsation of the compressor, causing an unnecessary as we as considerable 110186. I have provided an attachment for the relief device which prevents this action,

5o. 't v lv s; similar in construction to' those now in com- J The valves D Dare of cylindrical sh ape and fit in the valve-chambers a, form;-

and this attachment is one ef the features of my invention. i r

The invention is illustratedin-the accom-' panying drawings as folloWs:

Figure 1 shows a central section of the compressor and relief device on line 1 1 in Fig. 2.- Fig. 2 is a plan view of the compressor and relief device. Fig. 3 is an end elevation of the same viewed from the right 'of'Fig. 2. Fig. 4 is a section ofa detail of thecheck-valve-op erating mechanism on the line 4 4 in Fig. 5'."

Fig. 5 is a side elevation of the same detail. Fig. 6;is a central section of an alternative construction on-the line 6 6 in Fig. 7 Fig.

7 is'agplan view of the same construction.

A marks the compressor-cylinder, and B the piston or pllunger therein; C, the intaket e outlet-valves. These," are men use.

ing plungers' in said chambers. The Springs (2 are tensioned against the valves andtend to 7 Specification of Letters Patent. Application 51611 Tannery 29, 1902. Serial No. 91,783.

Patented June 19, 1906.

keepthem closed. A passage A. connects the outlet-ports a a. The outlet-passage E connects with-the passa e A. Arranged in this passage is a check-Va ve F. The passage E connects with the pipe E, which may be called for the purpose of explaining the intiom nected by the pipe d'with a chamber G. The chamber G is connected with the passage E by the passage 9/ The assa e g is controlled by thevalve G T eva ve G is nor- .the chamber (1 therefore immediately falls below that in the passage A, so that the valves D are forced open by pressure in the thepassage A. As the compressor continues to operate the'fiuid is simply moved from end and ports a.

The relief mechanism is as follows: A

atmosphere. The. valve H is arranged to valve is conneoted with the plunger H, which operates in a cylinder 1. The stem of the h exten s upwardly from the plunger H. Arranged on the top of this stem is a yoke h. This is secured in place by the nut h Extending from each side of the cylinder I are the lugs t. The springs H are tensioned' between the yokeh and the'lngs i. 'The pressure of these springs is exerted to force the valve H to its closed position. Connecting with the cylinder I j a chamber I, from which is'a' contracted haust-o ening i and into which leads a assage 'i'. n he passa e i communicates with the cylindernJ, in w ch is'arranged a plun or K.- Arran ed in the .end of the lunger is a valve '70., his valve is arrange to seatover the passa e i and close it. Leading into the'cylinder is a connection for the receiver J. "-A' pipe 1 leads om the plunger is e pin 1c T '51 operates mally 0 en, sotthat the fluid under pressure cylinder A and held open by the pressurein vention the receiver or receiver connec Each of the valve-chambers (1 1s con- :1 open to theatmosphere. The pressure'in to end of the cylinder through the passage A passage 9 extends from the chamber G to the close this passage. The upper end of this 'valve H asses through the gland 'i. A'stem from this connection to the'receiver connecfro r0 which the movement limited. Extending from the lever L also is an arni X, on which is placed the weight N.

The weight may be shifted on the arm N and secured in any position by means of the screw n. Extending from the yoke k is an arm h.

In th e end of this arm isa hollow screw g arranged to be locked in any adjusted position by means of the am-nut g. The stem 9 of th'e valve G extends .into the screw (7. A

PPi Dg g is arranged to move the valve G to arm h, thus permitting 3 5 eration heretoforedescribed.

its seat.

The operation of the several mechanisms is as follows: When the receiver-pressure rises above the desired maximum, it forces 25 the plunger K outwardly,

thus opening the valve is. Air or fluid under pressure passes through the passage i and operating on the under side of the plunger H raises it, opening the valve H and at the same time raises the the spring 9 to close the valve 'G. The air from the chamber G, and consequently from the chamber a, immediately escapes to the atmosphere, and the pressure forces the valves l) open, with the op- The pressure at which the relief device will act can be regulated by changing the tension of the spring M or the position of the weight N. As soon as the receiver-pressure becomes reduced to 0 the desired minimum the spring M and weight X, operating on the plunger K, close the valve k. The air in the chamber 1 and cylinder I exhausts through the minute opening The springs ll then force the valve 5 Tito itsseat and at the same time, opcratin through the arm [0, open the valve G, an

i the pumping action proceeds.

v In this scheme of relief device the air in the compressor is of course reduced below that of 5c the receiver-pressure, and it becomes necessary,-therefore, to provide some valve device this position hammers with each l of thecom pressor.=

for preventing a bahkflow of fluid from the receiver. The check-valve F is provided for thispurpose. An ordinary check-valve in ulsation As it is desirable to prevent this action, T provide the following mechanism for this purpose: The checkvalve is fixed on a stem which passes through the gland f on the side of the valvechamber Ei Arranged on the stem f is an arm Q, A cylinder 0 extends from one of the passages'll. A plunger I is arranged in this cylinder and 'is connected with the arm 0 5 Q by the connecting-rod 1). The pin 1), by

which the connection is made between the plunger and connecting-rod, is extended to each side of the plunger. Lugs o extend from the cylinder 0, and the springs R R are tensioned between the pin 1; and the lug 0. These springs operating through the connecting-rod and arm Q close the valve F soon as the plunger is relieved of air-pressure. As the cylinder 0 is connected with one of the pipes (1, this takes place whenever the relief operation takes place, so that immediately the relief device is brought into operation the valve F is instantly closed through the action of the springs It R, thus preventing any escape of fluid from the receiver. As soon as the relief device is thrown out of operation, as heretofore described, and' pressure is exerted on the fluid in the pipe d ressure is cxerted on the plunger P, and tiis is of suflicient area to overcome the springs R R, and thus open the valve I. By this mechanism the hammering of the valve F is prevented. It forms an instant check against the back movement of fluid from the receiver and is instantly opened when the pressure in the passages between the valve l and the compressor reaches a pressure approximating receiver-pressure It will be noted that the plunger K forms a primary motor and that this controls the valve controlling the secondary motor and that the counter-pressure on the primary motor may be adjusted by the tension of the springs M and the weight X, that'the plunger ll forms a secondary motor controlling the relief device or valve, that the plunger P forms a motor by which the check-valve F is controlled. When the term receiver is used in the claims, it is intended to include any passage or receptacle into which fluid is pumped. I

In the alternative construction shown in Figs. 6 and 7 the mechanism differs from that of the preferred construction in that the air is exhausted to the atmosphere with each opcration of theeompressor instead of being pumped from end to end and the valves D I) operate with each reci rocation of the piston. In this construction t e parts differing from those of the referred construction are the cylinder 1 w ich is connected with the pas sage I and has in it a piston Il,which operates a valve-stem II. This stem extends through the fitting t, the fitting making a tight joint between it and the passage G, leadin to the receiver. An openin G" leads from 1; 1e passage G to the atmosphere, and this is controlled by the valve at the end of the stem II. A stem h" extends from the piston above the cylinder. A yoke h is attached to this stem. A lock-nut h is pro? vided for locking it in adjustment. The springs H are secured to the yoke. In the operation of this mechanism when the pressure exceeds the desired maximum the piscombination with the compressor-valve; a

, ;means for connecting said rimary motor- 1 the valve G in said connection; means for chamber for said valve; a primary motor; a valve controlled by said primary motor;

with the passage into which uid is umped a secondary motor controlled by the valve actuated by the primary motor; a fluid-passage into which the fluid is pumped by the compressor; a connection between said assage and said compressor-valve cham er;

connecting the valve G with the secondary motor; and the valve H controlling an outlet to the atmosphere from the connection between said passage and the valve-chamber,

whereby the connectionis closed to the fluidpassage when said connection is open to the atmos here. I 1 2. n a relief dev ce for compressors the combmation with the compressor-valve D;

the chamber ain which said valve operates the passageE'into which fluid is pumped by the compressor; a connection between said passage and the chamber a; a primary motor connected with the passage into which fluid is pum ed; a valve controlled by said -motor, sai valve controlling a passage leading to achamber I, said chamber having a contracted outlet-passage t; a secondary motor in communicatlon with the chamber 1 and valves operated by said secondary motor toclose the connection between the'passage E and the chamber a and to open the connectlonto bring the chamber. a into communication with the atmosphere.

3 In a relief device for compressors the comblnation with the compressor-valve D;

the chamber a which said valve operates;

the passage E into which fluid is pumped by the compressor; a connection between said passage and the chamber a; a primary motor connected with the passa e into which fluid is pumped; a valve contro led by said motor, sald valve controlling a passage leading to a' chamber I, said chamber having a contract- 1 ed outlet-passage t the secondary motor comprising the cylinder I and piston 11, the

gland t on said cylinder; the valve H extending through said gland and connected with the piston H the stern h extending from the piston H; the valve G arranged to control the connection between the passage E and chamber a; and means connecting the valve with the stem h.

4. Inv a relief device for compressors a re.- ceiver connection in communication with the compressor a valve arranged to prevent backflow from said receiver connection toward the compressor; a valve-motor for opening said valve; a valve for controlling said valve- -motor; a separate motor for actuating the relief device; and means acting with the relief device'foractuating the valve controlling the valve-motor.

In a relief device for compressors, the

combination of the receiver connection E; the check-valve'F for preventing a b'ackflow of pressure therefrom; the stem f for said check-valve; the arm Q on said stem said .stem and arm being arranged to actuate the valve F; the cylinder 0; a plunger in said cylinder; springs tensioned against said plunger; a connection between said plunger and the arm on the stem; a passage controlled by the relief device 'for' admitting fluid under pressure to said cylinder when the relief device is out of operation; means for reducing the pressure in said passage when the-relief devlce is in operation and a separate motor forcontrolhng the relief device.

' In testimony whereof I allix my signature in presence of two witnesses.

v RUDOLPH CONRADER.

Witnesses? 1 GRACE E. YARD, H. 0. Loan.

Images