US1888322A - Magnetic pump - Google Patents

Description

Nov. 22, 1932. A. LANcToT ET AL MAGNET IC PUMP Filed May 5l, 1952 f f l f Patented ov. 22, 1932.

UNITED .STATES PATENT OFFICE ADOLPH LANCTOT, OF DESPLAIN'ES, AND ERNEST SPERISEN, OF CHICAGO, ILLINOS MAGNETIC PUMP Application med May 31, 1932. Seri-a1 No. 614,458.

Our invention relates to Huid pumps and particularly to a magnetic pump adapted for the elevation of gasoline or other combustible fluids.

5 We are aware that numerous magnetic pumps have been devised and operated, many thereof with little success. The difficulties that arise are occasioned by faults in design resulting in poor operation or non-operation 1 0 after a period of use. This is fatal so far as motor vehicle operation is concerned, inasmuch as it wholly incapacitates the motor until a repair or replacement is made. A fuel pump, in order to be useful in any sense,

must be so constructed that its operation shall be certain, barring wear or faults in material or workmanship; in other words, a device that will operate indefinitely and with certainty and that is not subject to tamper- 2o ing by the user. We believe we have designed a device that fulfills the most exacting requirements and that will operate indefinitely without adjustment orl attention in any particular.

We accomplish this result by improvements in several features of the design.

First: One of the fundamental difficulties encountered in a magnetic pump is that of the fusing or fouling of contacts, it being essential, of course, that such a device be provided with a pair of contacts so arranged that the circuit is made and broken a very large number of times per minute when in operation. We have avoided this difficulty by providing a pair of contacts of relatively large size and so arranged that fusing or sticking is impossible and the likelihood of fouling 1s extremely remote. The pair of contacts are located within a body of the liquid in motion and furthermore, in line with the flow of liquid, this tending to prevent the accumulation of any extraneous matter that might interfere with a good electrical Contact.

Second: Another cause of trouble in magnetic pumps of this type is and has been the flexible element constituting the piston that effects the pumping action. Such elements havejin some cases taken the form of metal diaphragms, or bellows formed of metal and of relatively small area. Even though the reciprocatory movement transmitted to the flexible element is comparatively small the ultimate fatigue point of the metal has interfered with indefinite operation through long periods. All metals, particularly those drawn during1 the process of fabrication have an establis ed fatigue point, in some instances running into the millions of actuations, but in a pump of this character the actuations even during a reasonable period of time of operation will extend far into the millions. This fact has resulted in the failure of many otherwise satisfactory pump designs. We have overcome this diiculty b. utilizing a diaphragm of relatively very large area, in fact of a diaphragm that extends across the entire transverse area of the pump casing and have utilized a closely woven fabric treated with a hydrocarbon-inert substance, rendering it impermeable to the passage of gasoline. In view of the very large size of the diaphragm and the fact that the movement thereof is very slight, its expected life is infinite. This may reasonably be expected because each of the fibers constituting the threads of the fabric is individually subjected to so slight a delection as to render the possibility of failure wholly incalculable.

Third: Another point of relatively great importance in the matter of manufacturing cost is in that we avoid all screws or threaded parts in the assembly with the exception of a wire terminal and two. pipe sockets. There is otherw: se no screw threaded part in the entire device; all the parts may be produced in punch press or automatic machine operation.

Fourth: A further point of advantage is that after the parts of our device are assembled, the dome or upper part of the casing is spun over or permanently joined to the other part of the casing, thus making it impossible for the user to tamper with the device or to attempt any adjustments.

The invention will be more readily understood by reference to the accompanying drawing in which the figure is a vertical sectional view through a magnetic pump constructed in accordance with our invention.

In the drawing we have illustrated a twopart casing, the lower or body part and the upper or dome part 11 being joined, as

will be hereafter described, b spinning over the flan ed upper edge 12 o the body art. Soldere into t e lower portion of the dy of the casing is a threaded socket 13 adapted to receive an inlet pipe not shown. A similar member 14 is secured in the dome and p rovides for the connection of an outlet pipe thereto.

A branch pipe 15 is connected to the inlet and projects downward throu h a screen 16 into a glass sediment bowl 17 w ich is removabl held in position by means of a spring bai 18. These parts are readily removable for the urpose of cleaning the screen and discharging any sediment.

Located within .the body of the casing is a solenoidal magnet 19 of common construction. This is located in a contracted portion of the body of the casing and suitably held in place. In order to insure a thorough electrical connection through the casing to the ground we spin ribs 20 in the side wall of the casing, the ribs embracing a metallic cross Wall 20a that forms a part of the magnet assembly. One electrical connection for the magnet is in the form of an insulated pin 21 having a wire connection 22 to the coil, the pin resting on a resilient arm 23 having an insulatedconnection through the casing to an exterior wire terminal 24. The other electrical connection is through the wire 25 and spring contact member 26 to the transverse plate 27. The margins of this plate are firmly held between two rings 28, 29 of insulating material fitted into the upper or enlarged part of the body of the casing. The plate 27 has an axial opening, surrounding which is a disc 30 having an inner flange that projects into the axial openin in the plate and at its periphery is provided with a plurality of ton es 31 that project through openin in t e plate and serve to underlie and ho d a contact piece 32 referably composed of stainless steel and nown in the trade as Ascoloy This piece may be in the form of a disc of relatively large size in order to insure ample area of contact.

The pump elements comprise a solenoid core 33 mounted to operate within an axial opening in the magnet and provided on its upper edge with an Ascoloy contact disc 34 the edges of which are crimped over the top of the core member. Fixed to the core 33 is a relatively long tube 35 that is guided at. its lower end through a fixed sleeve 36 held by the magnet and projecting at its lower end into the liquid space 37, in thelower part of the body of the casing. The core a-nd tube are .normally pressed upwardly by means of the coil spring 38 surrounding the tube. The tube has openings 39 thereon in order to prevent the trapping of any liquid beneath the core.

At a point just above the core and in register with the fixed contact piece 32 we provide a plurality of lateral openino's 40 in the tube, these bein so placed that the liquid in passing in auf out of the space surrounding the contacts will be caused to flow over the contacts thereby constantly sweeping the surfaces and preventing the lodgement of solids that would interfere with an electrical contact.

On the u per end of the tube 35 we mount a sleeve 41liavin a wide flange 42. A tubular element or co1 ar is pressed over the sleeve 41, the collar havin a curved marginal flange 44 the curved portion of which contacts the fabric diaphragm 45. The inner marginal edge of the diaphragm is securely clamped between the flanges 42, 44 while the peripheral edge is clamped between the insulated ring 29 and the foot flange 46 of the head piece 47. The parts are assembled as described with suita le washers interposed and the margin 12 of the dome spun over to permanently join the assembly against tampering. As heretofore stated the fabric of the diaphra is treated with a substance that is insolu le in gasoline and that will render the fabric impermeable to the passage of gasoline therethrough. i

Mounted on the up er end of the tube 35 is an inlet valve 48 he d against its seat by a spring 49 that presses against the apertured top wall of the cap 43. A similar valve 50 controls the outlet of fluid and is seated on a plug or sleeve 51 in the head piece 47 and held in place by a spring 52. 'lhe openings 53 provide for the outlet of the fluid into the dome or upper part 11 of the casing.

A clamping member 54 having attaching ears 55 may be used for securing the device in proper operating position.

The operation will be apparent from the preceding description. It will be understood of course, that the device is grounded and that the closing of the contacts 3234 completes a circuit through the magnet and thereby retracts the core against the force of the spring. It may be advantageous to note that while the vertically reciprocating movement of the pump element is very small yet the diaphragm 45 is of relatively great area. Inasmuch as this diaphragm is of fabric construction its expected life under the circumstances is infinite. Further it should be noted that the area of contact between the contact pieces 32, 34 is very great and no trouble from that source need be expected through long periods of operation. It should further be noted that the process of assembly is logical and progressive, the parts being inserted in the casing in sequence and finally enclosed by the dome which is permanently joined to the body of the casing. A device so constructed is im- 1,ass,saa

pregnable to tampering and may be expected to operate indefinitely without attention. All the principal parts are simple stampings that may be constructed in quantities at very low cost.

Obviously the construction is capable of some modification and we do not wish to be imited except as indicated in the appended claims.

We claim:

1. In a magnetic pump, the combination of a two part casing consisting of a body and a dome in superimposed relation, a fluid inlet in the body and an outlet inthe dome, a magnet within the body, an armature concentric with the magnet, a tube secured to and projecting axially through the armature into a liquid space below the magnet and above the magnet, into the dome, a diaphragm extending across the space above the magnet and held at its edges at the junction of the body and dome and movable with the armature, and a contact piece held above the magnet in position to be contacted by an upward motion of the armature.

2. In a magnetic pump the combination of a casing having inlet and outlet openings, a solenoidal magnet within the casing, a solenoid core, a diaphragm projected across the casing above the magnet, a tube extending axially through the solenoid core and projecting into the space beneath the magnet and through the diaphragm into the space thereabove, spring means for lifting the core away from the magnet, and a cont-act'piece in the space beneath the diaphragm and in position to be contacted by the rising core.

3. In a magnetic pump the combination of a casing having inlet and outlet openings, a solenoidal magnet within the casing, a solenoid core, a diaphragm projected across the casing above the magnet, a tube extending axially through the solenoid core and projecting into the space beneath the magnet and through the diaphra m into the space thereabove, spring means or lifting the core away from the magnet and a contact piece surrounding the tube and out of contact therewith in position to be contacted by the rising core to complete a circuit through the magnet.

4. In a magnetic pump the combination of a casing having inlet and outlet openings, a solenoidal magnet Within the Casing, a solenoid c ore, a diaphragm projected across the casing above the magnet, a tube extending axially through the solenoid core and projecting into the space beneath the magnet and through the diaphragm into the space thcreabove, spring means for lifting the core away from the magnet, an insulated wall projecting across the casing above the magnet and electrically connected thereto, said wall having an opening through which said tube projects, said wall being located in poi sition to be contacted by the rising core and acting to complete a circuit through said magnet to return the core.

5. In a magnetilcnpump the combination of a casing having et and outlet openings, a solenoidal ma et within the casing, a solenoid core, a diaphragm projected across the casing above the magnet, a tube extending axially through the solenoid core and projecting into the space beneath the magnet and through the diaphragm into the space thereabove, spring means for lifting t e core away from the magnet, an insulated wall projectin across the casing above the magnet and e ectrically connected thereto, said wall having an opening through which said tube pro'ects, said wall being located in position to e contacted by the rising core and acting to Acomplete a circuit through said magnet to return the core, the arrangement providing a contact area substantially as great as the area of the top of the core.

6. In a magnetic pump, the combination of a two part casing whose long axis is vertical and having an inlet opening near the lower end and an outlet opening near the top, a solenoidal magnet transversely arranged in the casing with its core opening arranged vertically, a core and spring means tending to force it out of said opening, a tube carried axially of the core and communicating with the space beneath the magnet, a fixed insulated contact wall above the magnet and o erated to ermit said tube to project theret rough an in position to be contacted by the rising core, a diaphragm above said contact wall and through which said tube projects and to which it is secured, and valves for effecting the discharge of liquid when the described' parts are actuated.

7. In a magnetic pump, the combination of a two part casing whose long axis is vertical and having an inlet opening near the lower end and an outlet opening near the top, a solenoidal magnet transversely arranged in the casing with its core opening arranged vertically, a core and spring means tending to force it out of said opening, a tube carried axially of the core and communicating with the space beneath the magnet, a fixed, insulated contact wall above the magnet and apertured to permit said tube to project therethrough and in position to be contacted by the rising core, a diaphragm above said contact wall and through which said tube projects and to which it is secured, and valves for effecting the discharge of liquid when the described parts are actuated, the described parts being designed to be assembled sequentially in the casing and the diaphragm to be held in place by the joining of the two parts of the casing.

8. In a pump, the combination of a two part casing providing an inlet and an outlos let for fluid, a magnet therein, a magnet core, a pair of contacts for effecting the energizing of the magnet, and a diaphragm acting as a piston o rable by said core, said diaphragm extending transversely across the caslng with its periphery held at the junction of the two parts of the casing.

9. In a liquid pump, the combination of a casing consisting of a bod part and a dome part providing an inlet an an outlet for liquid, a magnet, core, and contacts within the body part, and a fabric diaphragm actuated by said core extending across the casin with its peripheral edge held at the junction of the two casing parts.

10. In a liquid pump, the combination of a casing consisting of a body part and a dome part providing an inlet and an outlet for iquid, a magnet, core, and contacts within the body part, and a fabric diaphragm actuated by said core extending across the casing with its peripheral edge held at the junction of the two casing parts, the casing parts being permanently joined as the final step in the assembly of the device.

11. In a liquid pump, the combination of a casing consisting of a body part and a dome part providing an inlet and an outlet for liquid, a magnet, core and contacts within the bod part, a fabric diaphragm actuated by sai core extending across the casing with its peripheral edge held at the junction of the two casing parts, and a tube extending longitudinally through the core and through the diaphragm and constituting the operating connection between the core and the diaphragm.

12. In a liquid pump the combination of a casing having a liquid inlet and an outlet, a magnet therein, a core, a contact wall extending across the casing in position to be contacted by the rising core through which a circuit is completed, a tube extending longitu'dinally through and fixed to the core, a diaphragm connected to the tube above the magnet, said tube having side openings in register with the space directly beneath the contact wall whereby the fluid is caused to flow across the contact surfaces during operation.

In testimony whereof we have aixed our signatures.

ADOLPH LANCTO'I". ERNEST SPERISEN.

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