US2027879A - Pumping device - Google Patents

Description

Jan. 14, 1936. F. A. PTISCIONERE PUMPING DEVICE Original Filed NOV. 24, 19.34

4 M m If} 6 H J m 3 e 3 3 WW 2 6 WA 5 3 9 MN 2 Patented Jan. 14, 193

UNITED STATES PATENT OFFICE Application November 24, 1934, Serial No. 754,645 Renewed November 2, 1935 6 Claims.

This invention relates to internal combustion engines and has special reference to a fuel pump for such engines.

One important object of the invention is to provide a device of this character operable automatically by the electric current commonly used with such engines.

A second important object of the invention is to provide an improved diaphragm pump for such engines. a 4

A third important object of the invention is to regulate the .capacity of the pump by regulating the movement of the diaphragm.

With the above and other objects in view, as will be hereinafter apparent, the invention consists in general of certain novel details of construction and combinations of parts, hereinafter fully described, illustrated in the accompanying drawing and specifically claimed. 2 In the accompanying drawing like characters of reference indicate like parts in the several views, and;

Figure 1 is a medial section through a pump constructed in accordance with this invention. Figure 2 illustrates a slight modification thereof.

In the embodiment of the invention as shown in the present drawing there is provided 9. casing H! of generally cylindrical form but having 30 an offset II at one side of the upper end thereof. This casing III has between its upper and lower ends a partition I3 located about midway of the height of the casing. Beneath this partition on the side adjacent the offset II is a solenoid I4 35 which is provided with a core l5 normally elevated into a position at the upper end of said solenoid by means of a spring l6 which rests at its lower end on the partition l3 and bears at its upper end against a washer ll located beneath a flexible diaphragm l3 which is clamped on the upper end of the casing or cylinder In by means of the head IS. on the upper side of the diaphragm there is a washer 20 which is capped by a nut 2|. Y

The head I9 is provided with a neck 22 to which is connected a valve casing 23 provided with inlet and outlet valves indicated respectively at 24 and 25 and provided with pipe connections 26 and 21 respectively so that, upon depression of the diaphragm l8-fuel oil will be drawn through the valve 24 and upon the diaphragm resuming its normal position the drawn in fluid will be expelled through the valve 25.

Below the partition l3 there is provided an 55 electrical contact 28 whichmay be adjusted to (01. m ss) and from the partition by the screw 29. This contact is supplied with current from any desired source. Aligned below this contact is a second contact 29' on the inner end of which extends a slidably mounted contact 30 normally held in elevated position by the spring 3| and limited in upward movement by the nut 32. A swinging contact arm 33 is mounted on a shaft 34 positioned intermediate the contacts 28 and 29' and is connected to the core l5 by the snap spring 35 so that when the core rises under the influence of the spring 16 or is pulled down under the influence of the solenoid I4 the contact arm will swing from one position to another. A wire 36 connects this contact arm 33 and one end of the solenoid winding. A condenser 31 or resistance 38 may be interposed between the other end of the solenoid winding and the conductive connection to the source of electrical supply to avoid sparking and wear on the contacting surfaces. It will of course be obvious to any person hav-' ing an adequate knowledge at this art, or in fact of the general principles of electricity, that when the contact arm 33 is in the position shown in Fig. 1 the solenoid winding is much more heavily energized than when such arm 33 is in contact 29- and the current is conducted through resistance 38. This being the case it naturally follows that the vibratory arm 33, due tothe heavier energization of the solenoid winding, will be quickly pulled down but, when so pulled down the solenoid will still be energized to a degree sufiicient to interfere with the action of the spring I6 so that there results. a downward pulsation of a more or less greater degree than the upward pulsation or movement of the solenoid core. This is important in fuel pumps since it is desirable to produce a quick influx of fuel liquid and a slower or more gradual efliux of such fluid into the combustion zone.

It will also be seen that since the contacts 28 and 30 are both adjustable they may be brought as close as desired so that when the arm 33 swings from the contact 28 to the contact 30, if these contacts are properly spaced, the arm constituting a snap switch by reason of the use of the spring 35, some residual magnetism will remain in the winding of the solenoid, such residual magnetism leaking slowly off through the resistance 38. The capacity of the fuel pump can be regulated by adjusting the screw 29 or the contact 30 or both so as to regulate the throw of the contact arm 33.

There has thus been provided a simple and eflicient device of the kind described and for the purposes specified.

It is obvious that changes may be made in the form and construction of the invention without departing from the material principles involved. It is not therefore desired toconfine the invention to the exact form herein shown and described, but is desired to include all such as come within the scope of the appended claims. Having described my invention, I claim:

1. In a device of the kind described, a casing, a pump diaphragm at the top of said casing, a partition across said casing below said diaphragm, a spring between said partition and diaphragm urging the latter away from the partition, a solenoid winding on the opposite side of the partition to said diaphragm, a solenoid core extending through said partition into said solenoid and having fixedconnection to said diaphragm, a switch arm pivoted at one side of said core, a snap springconnecting said switch arm to said core and adapted upon movement of the core to shift said switch arm between circuit and non-circuit positions.

2. In a device of the kind described, a casing, a pump diaphragm at the top of said casing, a partition across said casing below said diaphragm, a spring between said partition and diaphragm urging the latter away from the partition, a solenoid winding on the opposite side of the partition to said diaphragm, a solenoid core extending through said partition into said solenoid and having fixed connection to said diaphragm, a switch arm pivoted at one side of said core, a snap spring connecting said switch arm to said core and adapted upon movement of the core to shift said switch arm between circuit and noncircuit positions, and means to resiliently check the movement of said switch arm.

3. In a device of the kind described, a casing, a pump diaphragm at the top of said casing, a partition across said casing below said diaphragm, a spring between said partition and diaphragm urging the latter away from the partition, a solenoid winding on the opposite side of the partition to said diaphragm, a solenoid core extending through said partition into said solenoid andv having fixed connection tosaid diaphragm, a switch arm pivoted at one side of said core, a snap spring connecting said switch arm to said core and adapted upon movement of the core to shift said switch arm between circuit and noncircuit positions, and means to regulate the movement of said diaphragm.

4. In a device of the kind described, a casing, a pump diaphragm at the top of said casing, a partition across said casing below said diaphragm, a spring between said partitionand diaphragm urging the latter away from the partition, a solenoid winding on the opposite side of the partition to said diaphragm, a solenoid core extending through said partition into said solenoid and having fixed connection to said diaphragm, a switch arm pivoted at one side of said core, a snap spring connecting said switch arm to said core and adapted upon movement of the core to noid winding on the opposite side of the partition to said diaphragm, a solenoid core extending through said partition into said solenoid and having fixed connection .to said diaphragm, a snap switch actuated by the movement of said core to switch current ofi and on to said solenoid winding, and means to alternately energize and deenergize the actuating means, said energizing means including a resistance shunted through said solenoid.

.6. In a device of the kind described, a casing,

a pump diaphragm atthe top of said casing, a partition across said casing below said diaphragm, a spring between said partition and diaphragm urging the latter away from the partition, a solenoid windingonthe opposite side of the partition to said diaphragm, a solenoid core extend-.

ing through said partition into said solenoid and having fixed connection to said diaphragm, a. snap switch actuated by the movement of said core to switch current off and on to said solenoid winding, means to alternately energize and deenergize the actuating means including a resistance shunt and a condenser interposed between the terminals of the solenoid.

NICHOLAS F. A. PISCIONERE.

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