US1684468A - Pump - Google Patents

Description

Sept. 18, 1928. 1,684,468

W. G. BROWN PUMP Filed Aug. 26, 1926 gnaw H101:

Patented Sept. 18, 1928.

- UNITED STATES WARREN G. BROWN, F DETROIT, MICHIGAN.

PUMP.

Application filed August 26, 1926; Serial No. 131,793. a

It is the primary object of my invention to provide a pump of cheap and economical construction, and one which is particularly adapted for use as a compressor for an artificial refrigeration system.

Another object of my invention is to provide a pump which is electromagnetically driven so that no reciprocating or moving arts are positioned exteriorly thereof With the above and other objects in view, my invention consists in the arrangement, combination and construction of the various parts of my improved device as described in the specification, claimed in my claims and shown in the accompanying drawing, in which: i

Fig. 1 is a diagram showing the electrical circuit employed with my pump, parts of the pump itself being shown diagrammatically in dotted lines.

Fig. 2 is a longitudinal sectional view of my improved pump.

I have shown apump cylinder 5 around which is disposed a pair ofmagnet coils 6 andr 7 and within which may be disposed apiston 8, comprising a steel shell having a laminated magnetic core of soft iron pieces. Around thecoils 6 and 7 is a sleeve 9 having an inwardly projectingcircular flange 10 which bears upon thecylinder 5 and separates thecoils 6 and 7. Each end of the sleeve 9 is screw threaded and a pair ofcaps 11 and 12 are provided, one upon each end of the sleeve. The caps are screw threaded to the sleeve ends as at 13 and 14 and the ends of thecylinder 5 abut the faces of the caps adjacent the centers thereof. The caps are provided with central inwardly projectingportions 15 and 16 which align with and extend into thecylinder 5. An intake passage 17 is provided in each of theprojections 15 and 16, as is also an outlet passage 18. Apipe 19 connects with each of the inlet passages and is provided with a suitable conventional check valve indicated diagrammatically at 20. Likewise, apipe 21 connects with each of the outlet passages and is provided with a check valve indicated diagrammatically at 22.

Anelectrical contact 23 is provided on the inner end of theprojection 15 and awire 24 extends therefrom to a point outside the cap 11, the opening around the wire being suitably sealed against the escape of gas or liquid from the cylinder. A similar contact25 is provided on the inner end of theprojection 16 and awire 26 leads therefrom to a point outside thecap 12, said wire being also suitably sealed to prevent the escape of liquid or gas around the same.

It will be apparent from the foregoing that by the addition of electric energy and a suitable reversing switch, thepiston 8 may be electro-magnetically reciprocated so as to alternately draw in gas or liquid through theintake pipes 19 and force the same out through theoutlet pipes 21 and thus produce a pumping action by reciprocating parts which are completely housed and sealed against leakage.

In Fig. 1 I have shown, diagrammatically, the electric circuit by which my improved device is operated. The circuit may be traced as commencing with thewire 30 leading to thepoint 31 in thewall of thecylinder 5 where it may contact with thesteel tube 8 of the piston. The current may pass from this point through either thecoil 6 or 7, depending upon whether thecontact 32 or thecontact 34 is engaged with theswitch arm 33. If

thecontact 32 be in engagement, the currentwill pass through thecoil 7 andwires 37', 35 and 36 back to the source of power to complete the circuit. If thecontact 34 be in engagement with theswitch arm 33, the current will pass through thecoil 6,wire 38 andwires 35 and 36 to complete the circuit.

Dependent upon whether thecoil 6 orth coil 7 is functioning, thepiston 8 will be drawn to either thecontact point 25 orcontact point 23. If the piston be drawn to thecontact point 23, a second circuit will be established through thewire 30,contact 31, steel shell of thepiston 8,contact 23 and wire 241 0 themagnetic coil 40,wire 41 andwire 36. If thecontact point 25 be in engagement with thepiston 8, a circuit will be set up through thewire 30,contact 31, steel shell of thepiston 8,contact 25,wire 41, electromagnetic coil ond circuit set up through thewire 41 andcoil 42 by the contacting of the piston with the point will serve to draw thebar 44 toward thecoil 42 and thereby make contact between theswitch arm 33 andcontact point 32. Thus, thecoil 6 will be cut out of circuit and de-energized, and at the same time thecoil 7 will be cut into circuit and energized to pull the piston toward it. This action will be continued alternately as long as current is supplied from a suitable source of supply.

It will be apparent that I have provided a simple construction of pump which will occup a small amount of space, and which ma be u ilized with conventional household alternating current to operate a pump for any one of a number of purposes. It will also be a parent that such a pump is particularl adaptable for use in artificial refrigeration systems because there are no reciprocating or moving parts positioned on the outside thereof, and requiring a seal between the inside and outside, around them.

It'Will be obvious that various changes may be made in the arrangement, combination and construction of the various parts of my improved device without departing from the spirit of my invention, and it is mys intention to cover by my claims such changes as may be reasonably included within the scope thereof.

What I claim is:

1. A device of the class described comprising a cylinder, a piston adapted for reciprocation therein, a sleeve around the cylinder, a pair of coils in the sleeve and around the cvlinder and caps secured on the ends of the

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