US1845937A - Fuel pump - Google Patents

Description

, ignition coil,

Patented Feb. 16, 1932 UNITED STATES PATENT orncr.

IBED G. SCHWEIBT EAL, OF CHICAGO, ILLINOIS, ASSIGNOB TO srnwm'r-wnnm O03- POBATION', OF CHICAGO,

FUEL

ILLINOIS, A CORPORATION OF VIRGINIA ruin Application fled larch 31, 1930. Serial 80.440375.

The purpose of this invention is to provide an improved and economically constructable device for pumping fuel to the carbureter of a motor vehicle engine from the main fuel supply tank located at a lower level than the carbureter, utilizing for that purpose the engine ignition circuit and specifically the ignition coil unit in which the interruptions of the circuit alternately energizing and deenergizing the magnetic'core, adapts the latter to constitute means for producing vibration or pulsation of a motor which may thereby become a pumping element by associat1on with suitable valves and conduits. The invention consists in the elements and features of construction shown and described as indicated in the claims.

In the drawings v Figure 1 is a diagrammatic view for showing in their relative positions on the vehicle the main ifuel supply tank, the carburetor and the pumping device of this invention.

Figure 2 is a vertical axial section of the ignition coil unit and the pump casing upon which it is mounted, the connection of the pump casing with the fuel source and the engine carbureter float bowl being indicated diagrammatically.

Figure 3 is a top plan view of the construction shown in Figure 2.

Figure 4 is a wiring diagram of the construction shown in Figure 2. r

In the structure as illustrated in the drawings, A represents the main fuel supply tank at a lower level than the carbureter which is shown at B. The ignition coil unit is indicated in totality by reference character, C, said entire unit being commonly called the V and being hereinafter re ferred to by that term. Referring to Figure 2, the ignition coil unit is shown comprising a casing, 20, having a magnetic element consisting of a central pole member, 30, which constitutes the solenoid core, en-

" compassed by the primary and secondary windings indicated at 40 and 41, with the usual paper insulation, 31!, said ma the outer 'po e respectively, indicated at etic element compri 'ng also member, 31, which embraces the solenoid windings,said outerpole member being extended beyond the solenoid windings and beyond the plane of the end of the central core pole member, protrudes from .the windings; and said outer pole member is furnished with an annular- 32, which may be referred to also pole piece,

as a flux ring, having its central aperture which also in alignment w1th the solenoid core pole member, 30. This central aperture of the flux ring is of suitable diameter to admit an armature indicated at 50, without contact with said flux ring, 32. a 1,

The pump body mounted upon or having mounted upon it the ignition coil unit, as

mentioned, comprises a mam casing member,

51, containing the pumping chamber, 55, having inflow and outflow connections herein after mentioned, having an aperture, 51, in its u per side through which {the umpmg member, hereinafter more pa ticu arly described, is admitted, said apert re being pro-" vided with a closure plate, 52. The casing member, 51, is recessed, as seen at 54, op osite the aperture which is closed by the c osure member, 52, to form the pumping chamber. The casing member, 51, is formed with "an inflow duct, 56, leading into ,the pumping chamber at the right hand side (referringto Figure 2) and the outflow discharge duct 57, leading from the opposite side of sai pumping chamber. The inflow duct, 56, leads from an intake port, 59, at which there is provided an intake valve, 60; and the discharge port, 62, at which there is rovlded a dischar e valve, 63, said intake an discharge valves ing of customary construction arranged for inflow and outflow respectively, and seating against reverse flow, and being held normally thus seated by the springs, 64: and 65, respectively.

The drawings indicate that the fuelarrives at the pump by way of a pipe connection indicated at 67 at the right hand and of the pump casing and through which it is delivered into. a fuel and sediment trap indi cated at M, from which, upon the trap being filled-to the inlet of the intake valve seating ,bushing, 68, it is withdrawn by the suction into the pumping chamber, 55. The drawings further indicate that there is provided on the discharge line beyond the dischar e valve, 63, a pressure trapping chamber,

the provision of the fuel and sediment trap andpressure trap, M, N, respectively, and the relation of these features to the remainder of the pump construction, are not part of the present invention which is, however, adapted to be embodied in a construction having such features, as shown in the drawings.

The pumping member in the pumping apparatus as shown consists of a flexibly expansible and reducible chambered member indicated in totality at 70, which numeral specifically denotes also its interior cavity, said member being formed by a pair of concentrically corrugated disks, 71 and 72, clinched together and sealed at their periphery for enclosing a chamber between them.

In the construction shown the upper corrugated disk, 71, has a central aperture at whose margin said disk is made fast and sealed by means of an open nipple, 71, to a correspondingl centrally aperture and corrugated disk, 73, which spans the central aperture, 51, of the ump casing, said disk, 73, being dished con ming to the form of the under side of the closure plate, 52, intruding into the central aperture, 51, and having a marginal flange, 73, said disk being clamped by said marginal flange between the pump casing and its closure member, 52; and the latter has a central aperture, 52, at which the movable armature member, 50, is mounted by means of a stem, 50, which 1 extends down through the re istered central apertures of the disks, 71 and 3, and is made fast at its lower end to the lower disk, 72, of the pumping diaphragm structure to which said stem is clamped by inner and outer clamping nuts, 75 and 76.

As shown, and as a matter of convenience for assembling the parts, the annular pole piece, 32, is mounted in proper position both with respect to the pump casing and with respect to the fixed core of the solenoid by being lodged upon the upper ends of an upwardly protruding annular flange, 52, of the closure member, 52, and upwardly protruding bosses, 52, to the latter of which said pole piece is secured by screws, 32; and being thus secured, said pole piece serves for stopping the upper end of a spring, 75, which reacts at its lower end on. an upwardly facing shoulder of a flange, 50", formed at the lower end of the movable armature, 50, said spring thus op-- erating for holding the armature normally withdrawn from the central core member, 30, against the magnetic attraction of the latter when the solenoid is energized.

, The operation of the construction as above 7 described may be understood from the foregoing description to be that when the ignition coil windings are energized the armature, 50,

is' attracted to. the core member, 30; and uponthe interruption ofthe circuit it is retracted protrudingly by the reaction of the spring, 7 5, the alternate attracted and retracted movement of the armature operating respectively for reducing and expanding the pumping member, 7 0, the reduction of said member operating for increasing the fluidra'pacity of the pumping chamber and thereby operating for suction to draw in the fuel supply past the intake valve, 60, and the enlarging of the pumping member operating for reducing the fluid ca acity of the pumping chamber and causing ischarge of fuel past the outlet valve, 63.

I claim: a

1. A pumping ap aratus comprising in combination a solenoid structure, a pump casing on which the solenoid structure is mounted, said pump casing having a pumping chamber, a pumplng member in said chamber armature in position for being encompassed by said pole member and reciprocating therein. 4

2. A pumping apparatus comprising in combination a solenoid, a ump casing on which the solenoid is mounte having a pump-,

ing chamber, a pumping member in said chamber arranged to be actuated for enlar ing and reducing the fluid capacity oft e chamber, the solenoid outer ole being extended beyond the plane of tli e central pole and furnishedwith'an annular pole p ece, and an armature carried by the pumping member mounted normally protruding through the central aperture of said pole piece and reciprocating therein in the pumpmg movement of said pumping member.

3. A solenoid structure having a magnetic core constituting one pole of the magnet with an opposite pole conslstin of a member embracing the solenoid windmgs and extendin ast the plane of the centra core pole and rnished with an annular-pole piece having its central aperture in alignment with the core pole a pump casin on which said solenoid structure is mounte pumping chamber with a pumping mem r therein arranged to be actuated for enlarging and reducing the fluid ca acity of the changber; an armature carrie by said pumping member for ada tin it to respond'to magnetic attraction y c amber-capacity-changhavin aing movement, said pumping member being positioned with respect to the solenoid struc-- ture for pumping movement toward and from the solenoid core pole, and armature being dimensioned and r 1- extending through the annular pole iece and reciprocating therein toward an from the core pole, and a spring reacting on the armature and pumping member in opposition to the malgnetic attraction of the solenoid magnet p0 es.

4. A pumpin ap aratus comprising in combination a so enoi structure; a pump casing on which said solenoid structure is mounted, said casing having a pumpin chamber; a pumping member in said eham r arrangedto be actuated for enlarging and reducing the fluid ca acity of the chamber, the magnet element 0 the solenoid structure having a pole member terminating roximate to the pum ing chamber; a mova 1e armature carr ed y the pumping member in position exposed outside the pumping chamber toward and proximate to a fixed pole of the magnet element of the solenoid structure, the pumping member being arranged for movement in chamber enlarging direction by the movement of the armature under attraction of the magnet element when the solenoid is energized, and the spring reacting on the armature for reverse movementwhereby the intake stroke of the pump is'aiiected by the magnetic attraction, and the discharge stroke is hmited by the reaction of the spring.

5. In the construction defined in claim 4, the pumping member being a flexibly expansible and reducible chambered member, so that its expansion reduces and its reduction enlarges the fluid capacity of the pumping chamber,

said pumping member being mounted in the pumping chamber b its wall at the side toward the magnet po e of the solenoid structure, and the armature being carried by the opposite wall, the first mentioned wall hava ing an aperture and the armature a stem extending through the aperture or reaching and securement to said opposite wall of the pumping member.

6. The construction defined in claim I hav- 5 ing the pumping member consisting of a flexibly expansib e and reducible chambered member having a nippleby which it is mounted at one side wall of the pumpin chamber with said nipple affording atmosp eric communim cation for ventin the cavit of said member, the armature being carrie by the rzsposite side wall of said expansible and ucible chamber.

In testimony whereof, I have hereunto set m hand at Chicago, Illinois,this 17th day of arch, 1930.

FRED G. SCHWEISTHAL. v

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