US1219938A - Vacuum power device. - Google Patents

Description

H. W. HAMILTON.

VACUUM POWER DEVICE.

APPLICATION FILED JUNE 4 1915.

1 ,21 9,938. Patented Mar. 20, 1917.

1 INVENTOR 3 2 1/7 mar/7,9, .u v

ED {STATES PATENT omzuon.

may w. HAMILTON,- or INDIANAPQLIS, mnmim.

vacuum rowan DEVICE.

To all whom it may concern:

Beit known that I, HARRY W. HAMILTON,

a citizen of the United States,residing at Indianapolis, in'the county of Marion and State of Indiana, have invented a new and useful Vacuum ,Power Device, of which the gine, as the modern low-built automobile often precludes a gravity feed of the fuel to the carbureter.

. In carrying out my invention, I provide a chamber having a. movable wall, said chamber being connected through two valves to a partial vacuum, such as the intake manifold of an internal combustion engine,

and to the atmosphere, respectively and connect such valves to said movable wall so that the movement of the wall to enlarge the chamber causes theopening of the valve connected to the partial vacuum and the closing of the valve connected to the atmosphere, and the movement of the movable wall to ensmall the chamber causes the closing of the first' valve and the opening'of the second valve. The movement of the movable wall causes the opening and closing of the valves, and the opening and closing of the valves causes changes in the pressure of the chamber, which changes'in turn cause the moving of the movable wall in opposite directions. In the preferred form of my in vention, the movable wall is in the form of a diaphragm, and in addition to furnishing the wall of the chamber already mentioned also fu nishes a movablewall of another chambe which is connected through two automatic valves to a source of fuel supply and to a carburetor, so that asthe diaphragm moves there is a pumping action to force the fuel from the source of fuel supply to the carburetor.

The accompanying drawing illustrates my invention. Figure 1 is a sectional-view through a power device embodying my invention, showing diagrammatically its connections to an mternal combustion engine,

Specification of ietters Patent.

thereof closed to the intake manifold and opened to the atmosphere; and Fig. 3 is a detail showing the valves both in closed position, which occurs when the diaphragm is in an intermediate enlarge the chamber;

An internal combustion enginelO, shown as having four cylinders, is shown diagrammaticallyfls having the various cylinders connectedto a common intake manifold 11, which in turn is connected by a 'supply pipe Patented Mar, 20, 1917, am utation filed June 4, 1915. Serial no. 32,065.

position and moving to v 12 to a carbureter 13. There is also a fuel supply tank 14, which,has a filling cap 1'5 provided with a vent 16. All these are of any deslred type, and the engine operates in the usual manner to maintain a partial vacuum in the intake manifold 11 and intake,

supply pipe 12.

he vacuum. power device comprises a casing 20 which provides a chamber 21, one,

end of which chamber is provided with a movable wall, which in the preferred form of my invention is a flexible diaphragm 22. This diaphragm is clamped at its periphery between a flange 23 on the casing 20 and the rim of a. cupped cover 24, which protects the diaphragm 22 and with it forms a sec- I 0nd chamber 25, which-is separated from the chamber 21 by the diaphragm 22 so that the two chambers are entirely distinct. The chamber 21 is connected to the intake manifold 11 by a pipe '30, the entrance to which from the chamber 21 is in the form of a valve 'seat'31 which cooperates with a movable valve 32. This valve 32 is carried by a plunger 33, one end of whichbears against the diaphragm 22. Preferably aspring 34: is provided for forcing the plunger 33 awayfrom thevalve'seat 31. The valve 32 and plunger 33 are connected by a "lost motion 1 connection, which in the form [shown-is provided by a head 35 on the stem of the walve 32, this beach being slidably -mounted in a pocket 36 in the upper end of the 'plunger 33, and the head 35 being shorter than the pocket 36 so that the desired lost motion is-provided. The plunger 33 is pivotally attached to the free end of an arm 37, the other end of which is pivotr'. V U

=ally mounted on a lug 38 on the inner wall of the casing 20. The arm 37 is provided with-a cross pin 39 at an intermediate point, which cross pin receives the slotted head 40 of a pin 41 slidably mounted in a bearing 42.

The upper end of the pin 42 cooperates with a ball 43 of a ball valve, the seat of which is provided by a plug 44 having a screwthreaded mounting in the casing 20 so that, it can be screwed in and out, a lock nut 45- 'upper end of its movement causes the valve 32 to engage the valve seat 31 to close the outlet from the chamber 21, and also causes the pin 41 to lift'the ball 43 from. its seat to allow the ingress of air from the atmosphere into the chamber 21. This causes the pressure in the chamber 21 tobe restored,

whereupon the spring 34, assisted by the resilience of the diaphragm 22, returns such diaphragm to normal position, thus allowing the ball 43 to return to its seat, and then, after the lost motion provided by the head 35 and pocket 36 has been taken up, causing the valve 32 to be moved from its seat 31 to open the communication from the chamber 21 to the intake manifold. Then the-operation just described is repeated.

The power produced by the movements of the diaphragm 22 may be used for any desired purpose. In the arrangement shown, this power is used for pumping fuel from the supply tank'14 to the carbureter 13. For

this purpose, the chamber 25 is connected through a check valve and a pipe 51 to the fuel supply tank 14, and through a check valve 52 and a pipe 53 to the fuel inlet of the carbureter 13. The check valve 50 opens toward the chamber 25, to permit fuel from the tank 14 to enter such chamber, while the check valve 52 opens away from such chamher, to permit the fiow of fuel therefrom.

Thus as the diaphragm is moved up and down as above described, the chamber 25 is alternately enlarged and ensxnalled, and

fuel from the tank 14 is first drawn into such chamber 25, through the valve 50, and then forced from such chamber to the carbureter 13, through the valve 52. The valve 52 being i erted, in the position shown, so that it ill not drop to its seat by gravity, an actuating. or setting spring 54 is provided for normally pressing it to its seat. The device is arranged to pump fuel at a greater chamber 25.

carbureter. In the arrangement shown, the

closing of the float valve in the carbureter merely blocks th'eoutlet passageway frontthe chamber 25, and so stops the action of the device while the carbureter float valve is closed, by preventing the ensmalling of such device and the supply of fuel to the carbureter to be intermittent. If it is preferred that the action of the device be continuous, there may be provided in the pipe 53 an overflow reservoir located at a' higher level than the carbureter 13, the overflow pipe from said reservoir leading back to the supply tank 14.

I claim as my invention:

1. A vacuum power device, comprising a chamber having a movable wall, an outlet valve from said chamber for connection to a partial vacuum, an inlet valve leading from the atmosphere to said chamber, and connections from said movable wall to said two valves for closing the first valve and opening the second valve by the movement of ,said wall to ensmall the chamber and for opening the first valve and closing the second valve upon the movement 'ofsaid wall to enlarge the chamber, said connections including a lost motion connection between the movable wall and the first valve for delaying the opening of such valve.

2. A vacuum power device, comprising a hollow casing, a flexible diaphragm closing said casing to provide a closed chamber therein, an outlet valve from said chamber for connection to a partial vacuum, an inlet valve connecting said chamber with the atmosphere, a spring tending to move said diaphragm in the direction to enlarge said chamber, and connections between said diaphragm and said two valves for closing the first valve and opening the second upon the Thiscauses the action of the flexing of the diaphragm inward and for opening the first valve and closing the second u'ponthe flexing of the diaphragm outward relative to such chamber, said connection between the diaphragm and the first valve including a lost motion connection which permits the opening of said first valve to be delayed until after the outward flexing of the diaphragm has been partly completed.

3. A vacuum power device, comprising a hollow casing, a flexible diaphragm closing said casing to provide a closed chamber therein, an outlet valve from said chamber for connection to a partial vacuum, an inlet valve connecting said chamber with the atmosphere, and connections between said diaphragm and said two valves for closing the first valve and opening the second upon the flexing of the diaphragm inward and flexing of the diaphragm has been partly for opening the first Valve and closing the completed. 10 second upon the fiexingof the diaphragm' In witness whereof, I have hereunto set outward relative to such chamber, said conmy hand at Indianapolis, Indiana, this 17th 7 5 motion between the diaphragm and the day of May, A. D. one thousand nine hun-. first valveincluding a lost motion connecdred and fifteen.

tion which permitsthe opening of said first n valve to be delayed until after the outward HARRY W. HAMILTON.

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