US1533128A - Magnet valve - Google Patents

Description

April 14, 1925. l,533,l28

G. w.y MEYERs MAGNET VALVE Filed Nov. 50, 1920 VIII INVENTOR BY 'ATToRNl-:pgl

Patented Apr. 14, 1925.`

UNITED s TnTEs 1,533,128 PATENT OFFICE. i

Gaone! W. lnrnns, or runway, NEW JERSEY, assroNon. To NATIONAL :PNEUnA'rIc conan, or NEW You, N. Y., a comonmron or WEST VIRGINIA.

IAGNET VALVE.

Application led November 30, 1920. Serial lo. 427,431. I

To allwhom it may concern:

Be it known that I, .GEORGE W.f Mams, a citizen of the United States, residin at Rahway, county of Union, State of ew Jersey, have made a certain new and useful' Invention in Magnet Valves, of which the following is a specification. l

This invention relates to improvements in electromagnetic control valves of the type described in Patent No. 1,300,781, issued April 15, 1919, to Rowntree, which valves are adapted, among other purposes, for use in connection with electro-magnetic control fluid pressure actuated motors for o eratmg doors, tes, and other devices, whic are to be put into operation at various times by operating motors.

The objects of `my invention include the rovision of an electrically operable valve, or controllin the pressure 1n Huid pressure motors, w ich is certain and 'eilicient in operation, yet simple and rug ed in cony struction, to there y admit o ready assembling and easy ins ction or repalr.

A further object of t e invention is to provide means for protectin the magnet coil against injury, and to de nitely locate and fix the magnetic centre.

A further object includes the provislon of a simple adjustable valve structure which can be removed and replaced as a unit, and in which the operating parts are reduced to a Other objects of the invention will appear more fully hereinafter.

I attain these objects by the mechanism illustrated in the accompanying drawings, of which- Fig. 1 represents a sectional elevation of the structure embodying my invention;

Y Fig. 2 represents a cross-section in part on lines 2-2 of Fig. 1, looking in the dlrection of the arrows;

Fig. 3 represents the valve structure in longitudinal section; p

Fig. 4 represents the valve head and stem;

Fig. 5 represents a cross section of the valve head; and

Fig. .6 represents a section of the central core stem. I

Similar numerals refer to similar parts throughoutjhe several views.

vReferring now to the drawing, 7 represents the outer protective housing or casing which is integrally connected with the supporting base 8 and has a removable cover 9. The cover is held in position by any ,convenient means, as by screws 10.

The base is rovided with a longitudinal bore centrally ocated, into which is adjustably screwed at 12, the valve unit shown in Fig. 3, the construction and operation of which will be explained more in'detail hereinafter. In the o posite end of this bore there is firmly fixe as by a screw-thread 13, a central core stem 14, of iron or magnetic material, having an enlarged body portion 15 for supporting the solenoid with flattened sides 16, for adjustment, and a conical part or head 16', to aid in centering the movable core. This core stem is also provided with .a central bore of comparatively small diameter, but having an enlarged portion at the conical end. Within this bore there is slidabl mounted an operating stem 17, havin a ea-d 18, for operating the valve, as wi 1 be explained more fully below. Upon' the body portion of the central core stem there is mounted the solenoid support 19, of insulatin material, which carries the solenoid 20 wit its supporting core lining tube 21, preferabl of cop er or'non-magnetic material, an solenoi sheath 22 of a magnetic metal. The insulating base is provided with binding screws 23 and 23', for the solenoid terminals 24 and 24'. The solenoid is further protected with insulating washers 2 5 and 26, and a magnetic shield 27, all of which are held in placeby the core lining tube 21. To' facilitate assembling and re air washer 25 is rlotativelyl mounted on tu 21, and is provided with an opening 25', as shown in dotted lines in Fig. 2. By simply rotating the washer through 180, more or less, to cover the terminal connections, complete protection is afforded forV said connections. The protective sheath 22, not only'protects the coil against injury before or vduring assemblin but also serves to locate and definitely x the magnetic 100 centre of the coil in the head portion of the operating core described below.

Within the core lining tube 21, there is slidably mounted the movable operating core 28, having a countersunk solid hea-d 105 portion 28', at one end, and a well 29, of comparatively large diameter, extending into the core from the other end. This end carries also extension 29' for increasing pull of armature at low voltages. The solid 11o counter-sunk, head ortion rests directly upon the conical hea 18 of the valve operating stem 17, so as to constantly and automatica-lly; center itself thereupon, and (li-' terial, having screw threaded parts 3l and 31', for adjustable attachment -in the bore 12,-and annular depressions 32 and 32 for a'ir ducts, as will beV explained below. The unit valve `base is provided with a 'bore 33 of comparatively large diameter extending into the valvev base and terminating in a smalle-r centrally located air duct 34, and formed into a valve seat at 35. Communicating with the central air duct 34 is air duc-t 36, wliic-lr in turn communicates with the annular chamber 37 and the air supply duct 38.

A valve head 39, having a valve seat closure 40, at one end, and a valve guide stein 41, at the other', is slidably mounted and fitted Within the valve. bore. Intermediate the v ends of the valve head are piston-ring` extensions 42, provided with passages 43. Infthe upper part of the valve bore, by screw threads or other means for adjust.- ment, there is fitted avguicle plug 44, having a central escape passage 45, and a valve seat 46. It will be observed that guide plug 44 is adjustable so that the distance between valve seats 35 and 46 may be properly adjusted Whenever necessary or desirable.` o

A spring 47 normally holds the valve head in a closed position against valve seat 46, thus preventing the escape of the operating medium, the pressure of which also aids in keeping the valve seated. When the valve is unseated, however, as when the coil l is energized, or when the valve head is I an adjustable valve plug in one end of said otherwise depressed, the pressure 'medium employed escapes through passage 43, to passage 45, and out to the open atmosphere through the opening 49.

When air is employed as the operating medium for the motor or operating cylinder with which the valve mechanism is in direct communication, and with the valve in position as shown in Fig. 1, pressure is maintained in the operating cylinder due to the direct and open communication with the source of supply through the supply duct 38, annular chamber 37, valve l35,` and through cylinder supply or exhaust passage If it is now desired to cause the valve to operate vthe operating mechanisfn -to which itis applied, the solenoid is energized by any suitable means, thus pulling down the operating core, which communicates its motion to the valve stem and valve head rthrough vthe operating'stem 17, and thus unseating the valve and opening the exhaust to the air in the manner described,y above, for the operation of said motor.

Therefore, having now set forth the obwith an energizing coil and a contro'l valve for controlling fluid pressure in an operating motor, of 'a fixed core stem terminating in a beveled head en'd, v a pin projecting from said 'head end, anda movable core ivithin said coil having a concave seat for centering on said pin head for operating said valve.

2. In an electro-magnetic valve, the coni-` bination with an energizing coil and a control valvc for controlling fluid pressure in an operating motor, of a fixed core stem terminating in a beveled head end and provided with a bore, a. pin mounted in said bore, a self centering operating core Within said coil seated on said pin, and means carried by said core for manually operating said valve. j

3. In an electro-magnetic valve, the com'- bination with an energizing coil and a control valve mounted ina unit valve Ybase and housing for controlling fluid pressure in an operating motor, of a fixed core stem mount- 'ed in said valve base and projecting into said coil, said core stem being provided with a bore, a pin in said bore, an insulating base carried by said core stem for supporting said coil, an operating core Within said coil, and means carried by said operating core for effecting the operation of said valve.

4.' 4An electro-magnetic valve comprising a unitary valve base and magnetic coil lions# ing, said base being provided with a bore,`l

bore, a valve in said plug, 'a fixed coresteni in the` other end of said bore and extending' into said housing, said stein being provided with a bore, a bevel headed pin in said bore,

an insulation base carried on said fixed core stem, a coil carriedlby said base, said coil iis y being provided with an inner non-magnetic shield and an outer magnetic shield, and a floating core extending into said coil and centered on said pin-head for effecting the operation of said valve when the coil is energized.

5. The combination, in a magnet valve, of a supporting base and an energizing coil carried'on said base, ofv a. pressure control valve adjustably mounted on said base in central alignment with said coil, a movable operating core Within said coil, a. stem onl said' base for fixedly supporting, said coil and having a countersunk bore, and a. beveled headed pin carried by said stem in said countersunk bore for positioning the operating core, and for limiting and transmitting its movement to the control valve.

6. In a magnet valve, the combination with an energlzing coil and a control valve for controlling fiuid pressure inan` operatin motor, of a fixed core stem, and a movab e core within said coil for operatin said valve, said movable core being provide with a central well, a pin in said well for manually effecting the operation of said control valve, and a protective shield for saidcoil.

7. As an article,I of manufacture, an adjustable unit pressure control valve, comprising a valve base 'provided with pressure medium ports, a fixed valve seat and an adjust- N lable valve seat within said base, and means fluid pressure in an operating mechanism,

comprising a one piece adjustable valve base provided with fluid pressure medium ports intermediate the ends thereof, an adjustable valve plug in one -end'of said base, and a valve seat in said plug, a fixed valve seat near the other end of said base, and a double seating pressure control piston operating to v close one port upon opening of the other and vice versa.

In testimony whereof I have hereunto set GEORGE. W.l MEYERS.

my hand on this 18 day .of November, A. D. 1,. 1920, f

Images