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Publication numberUS864990 A
Publication typeGrant
Publication dateSep 3, 1907
Filing dateOct 24, 1904
Priority dateOct 24, 1904
Publication numberUS 864990 A, US 864990A, US-A-864990, US864990 A, US864990A
InventorsWalter J Richards, Charles P Tolman
Original AssigneeWalter J Richards, Charles P Tolman
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 864990 A
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Description  (OCR text may contain errors)








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ToLMAN, oF1\uLwAUKEE, wisconsin. 'I


To allwhom 'it may concern:

vlie it known that we, WALTER J. RICHARDS and CHARLES P. ToLMAN, citizens oi the United States, re-v siding -at Milwaukee, inthe county oi Milwaukee and State oi Wisconsin, have invented a certain new and its dbject is to provide a magnetic valve which ,will be automatically operated to open fthe supply circuit through the water jacket when the compressor or other machine is in operation and to automatically close the water circuit when the compressor or the machine is Our invention is particularly adaptable for ilse iii connection with electric motor driven air compressors that are tohe run intermittently and the controlling coil o the valve' may be so connected with the circuit operating the driving motor that the controlling valve is opened when the motor is started and closed when the motor ceases running, the controlling valve being interposed in the path of the water ilowing from thev supply source to the water jacket about` the compression cylinder.

The valve mechanism consists oi a solenoid winding disposed about the core, and in which the core is adapted to be drawn upon energiaation oi the coil, -Which coil may be included serially in the motor circuit, or otherwiseconnected therewith to insure energization-thereoi when the motor starts and denergization thereof when current flow is withdrawn from the motor. The stem oi the controlling valve engages with the 4end of the core and upon energization ofthe winding is moved b'y the attracted core to open passage through the valve `chamber and to allow the passage i water tothe Water jacket, a spring serving to close the'valve upon denergization of the solenoid winding.

Our inventionvis best understood by 'reference to the accompanying drawings, in which:

Figure 1 shows a side elevation of the valve and con'- trolling mechanism, Fig. 2 shows a longitudinal sectional view thereof taken on line 2*-2 of Fig. 1, Fig. 3`v is a top viewthereoi, and Fig. 44 shows a utilization ofA the magnetically operated valve` for controlling 'the water jacket supply-for the compression chamber of an air compressor. 3 Like reference characters refer to like partsthroughoutthe figures. dA supporting base 1 is adapted to be screwed or bolted to any support and a cylindrical cup-shaped casing 2 is secured to-the upper part of the/base. Within the 'Specification of Letters Patent.

Application filed l(.lotobel' 24, 1904. Serial NO- 229,880.

Patented vSe'ptrB, 190'7.

casing 2 is a spool frame 3,- preerably oi non-magnetic material, having a central core opening 4. The lower flange V5 `of the spool is held in place 4by an annular shoulder 6 andthe upper flange -7 oi the spool is secured over the top edge oi the casing 2 to protect tho windings S carried by the spool. A' core 9 oi soft iron is adapted to slide within the core opening 4 and at its top is pro- `vided.with a circular flange or disk 10 secured in the annular recess l1, and also formed oi wrought iron. Upon current flow through the windings 8, the tendency would be to complete the 4magnetic circuit through the core 9,. the disk 10 and through the walls oi the casing 2, which may be of cast or wrought iron, er other magnetic material. An arm 12 extends from the lower part of the base l. and supports a bushing 13 forreceiving the hollow stem 14 oi the valve fi'ame l5, the stem being threaded and engaged by `lock nuts lli, 1G by means of which itmay be secured in the bushing 13,-the lowerend of the stem being adapted for threaded connection with piping.` A hollow stem 17 extends from the valve yframe 15, a valve seat 18 being disposed between the stems. A valve 19 engages the seat 18 and controls the valve opening 20 between the stems, the valve being secured to the lower end of a valve stern 21, passing upwardly from the valve through a bushing 22 threaded into the upper part of the valve frame 15. A brass stud 23 engages with the upper end 0i the valve stem. 21 and its other end is secured in the lower end ofthe core 9, being shown as threaded therein and further secured by Ameans of a pin 24. Astuling box 25 engages over the end oi the bushing 22 and by means of lock nuts 26, 26 having threaded engagement with the bushing 22.the position of the valvewith respect to the solenoid core may be adjusted. A collar 27 is secured to the valve stem below the bushing 22 and a compression spring 28 is disposed betweenV this collar and the valve seat and when there is no current flowing however, oi the solenoid winding,` the core 9 and attachd disk' 11 will be attracted into the core opening and the valve stem will be pushed downwardly to remove the valvei from its seat and to open the passagejway between the stems 14 and 17, the spring upon deenergization servingto close the -valve and to return i the core to its normal position. The stud 23,` as before stated,. is preferably of brass, or other non-magnetic material, to preventA neutralization of the magnetic pull or)l core 9. The terminals 29 and 30 of the solenoid winding pass through insulated bushings31 extending througrhjthe casing 2 and 'also through insulated bushings'32, 32extendin`g through the wall o the base and:

are thus securely held in place` and well insulated.

' In Fig; 4 we'have shown an air compressor driven by an electric motor, the circuit for which is controlled by a switch armV actuated and adjusted by the pressure in 35 main b.

core 52, whereby. the shoe 54 is broughtinto engagement with its companion shoe 49, and thereupon curthe reservoir connected with the compressor. The electric motor 33 is connected with the plunger 34, recip'rocating Within the compression cylinder 35. The compressor cylinder is provided with outlet valves 36,

36 leading to the reservoir 37 and with inlet valves 38,

inder and connects by piping 4() with the top of a cool A water jacket 39 surrounds the compressor cyling fluid reservoirAl and -also connects by piping 42 with the bottom of the reservoir, and a magnetically controlled valve mechanism, such as described in Figs. 1, 2 and 3, controls the circuit through the piping 42.

The tube 43 of a well known Bourdon gage is connected -with the reservoir 37 and at its end engages through nk mechanism 44 with 'a switch arm 45hadapted to enl 'gage terminals 46 and 47. A solodoid coil 48 connects with the contact 46 and with a shoe 49 connected through a switch 50 with the main conductor a of the supply circuit c while a solenoid windingl connects with the Contact 47 and with the main conductor b. A

core 52 is adapted to pass through the solenoids and is provided with an arm 53 terminating in a shoe 54,l the shoe 54 being connected Withthe switch arm 45 and with one terminal 55 of the motor 33. Themotor 33-is shown as'a series motor and the other terminal '554 thereof is connected through the field winding 56 and through the solenoid winding 8 of the magnetic valve with the supply conductor b. I

As the pressure in the reservoir 37 becomes too low, the switch arm 45 will move over and engage the contact-46,

` whereupon a circuit is closed from the supply conductor rent will flow from the main conductor a through the shoes 49 and 54 directly through the motor and through the magnetic valve. Upon current Vflow through the motor and through the solenoid winding 8 the motor will start and at the same time the core 9 of the mag'- netic valve will be drawn inwardly yto remove the valve 19 from its seat'to allow the water from the supply tank 41 to flow through the piping 42 and into the water` jacket, the valve being held open as long as current A flows through the solenoid winding 8, that is as long as themotor is running. As the pressure in the reservoirV 37 increases, due `to the operation of the motor, the switch arm 45 will gradually move toward and will engage the contact 47, whereupon a current will flow from the, main' conductor a through the switch 50, shoes 49 and 54through conductor 57, `through switch arm-45, conductor` 59 and through solenoid winding5l to supply main b. Upon energization thereby o1' the winding 51 the core 52 will be attracted and the shoe will be removed from the shoe 49, thus disrupting the circuit through thernotor and through the -solenoid winding 8. The motor therefore stops and the valve 19 is closed, due to the spring 28. ,y

We .thus provide electrically controlled valve means which allow water supply to the water jacket only upon operation of the compressor piston, We do not wvish to be limi'ited, however, to tho adaptation of the'niagnetically i'controlled valvey as hereinishown., as a valve ol' this kind may be employed whereveran electric eir-V cuit isutilized in'connection with the machine or engine. l g

Weclaim as new'and desire to secure by Letters Patentz- The combination of a compression cylinder surrounded by water jacket,.an electricA motor for reciprocating,r a piston within said cylinder, an electric circuit for said motor, ay supply pipe leading to saidavater jacket, a valve chamber interposed in the path ofnsztid supply pipe. a.

'valve in said chamber for normally closing passage through said supply pipe, a stem. extending froinsaid valve, a bushing through which said valic stein extends. a collar on said valve siem, a spring` interposed between said collar and valve seat' to normally hold said valve in a closed position, a solenoid core, a solenoid winding for said core connected iu the motor circuit in series with the motor, a piece of non-magnetic material secured io said core and engaging said valve stem. energizalion ol said solenoid causing attraction of said core towards said valve stem to cause4 the, valve to be opened to admit passage of water throughlsaid water jacket, said solenoid being energized and deinergized upon closure and'openin.;r of the motor circuit. In witness whereoflfuie hereunto subscribe our naines.

Witnesses as to signature of Walter I. Richards:

ANNA F. Seu.llrrnalfnu, ALMA A. linnn. y

Witnesses as to signature of Charles l'. 'lolman LEE LIcH'iENs'rniN, JOHN J. RYAN.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2449408 *Sep 13, 1945Sep 14, 1948Ingersoll Rand CoCompressor
US2458284 *Feb 16, 1945Jan 4, 1949Ingersoll Rand CoCooling-water supply apparatus for compressors
US2963876 *Oct 21, 1957Dec 13, 1960Associated Refrigerating EnginVacuum cooling apparatus
US4551037 *Jun 6, 1983Nov 5, 1985J. Wagner GmbhDevice for applying paint with reciprocating linear motor
US5102306 *May 8, 1990Apr 7, 1992Liu Kuo ShengAC/DC air pump
Cooperative ClassificationF04B35/04