US2166901A

US2166901A - Electric circuit interrupter

Info

Publication number: US2166901A
Authority: US
Publication date: 1939-07-18
Anticipated expiration: 1956-07-18

Description

July 18, 1939. E. coFFEY 2,156,901

ELECTRIC CIRCUIT INTERRUPTER Filed Dec. ll, 1937 uit? i' i'.

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UNITED STA-Tas Pil-TENT OFFICEK yELECTRIC CIRCUIT INTEBRUPTEB- Irven E. Coiey, St. Louis, Mo., assigner to Carter Carburetor Corporation, St. Louis, Mo., a corporation of Delaware Application December 11, 1937, Serial No. 179,302

6 Claims. (Cl. 200-27) This. invention relates to mechanism includthe switch l. Wire 8 connects switch 'l through ing areciprocating member and consists, particuterminal 9A with the'4 ignition breaker point I0, larly, in means for preventing reciprocation of shown in Fig. 2, the stationary point II being the member at an excessive rate. grounded. A carburetor I2 also carried by the 5 Fuel pumping devices for internal combustion engine is connected by a. tube I3 to apumping de- 5 engines, of the type in which a piston ordiavice, generally indicated at I4, mounted on chasphragm is connectedto a moving `part of the ensis frame I5, this device in turn being adjacent gine, must be constructedtoproduce a substantial and connected by a tube I6 to fuel storage tank fuel now when the engine is operating at low Il at the rear.

10 and intermediate speeds and means are usually A third wire I0 also connects switch I with the 10 provided for relieving pressure when the engine distributor housing, this wire being connected demands less than the full or potential output through terminal I9 to a stationary point 20 of the pump. However, the speed at which rediagonally opposite ignition point I0. A movable ciprocating pumps canfbel effectively'r` operated is breaker point 2I is pivoted at 22 opposite the limited, and some means must be provided toinpivotal support I0afor ignition breaker point sure an adequate now when the vspeed of the I0 and is connected by an electrical wire 23 to pump driving member 'is excessive. Ordinarily, the pumping device I4. Y the pulsations of the pump piston or diaphragm Breaker arm I0 has a finger 24, usually of inmust not exceed 1500 or 2000 per minute. The sulating material, which engages an octagonal presentinvention is` applicable more particularly cam 25 rigid with the distributor shaft 26. Break- 20 to electrical pumps of the type utilizing a mager arm2l has a finger 2l engaging a second cam netic coil and a make and break device compris- 28 on shaft 25. Arms I0 and 2l are constantly ing a reciprocating member operated from a part urged toward the cams by

springs

29 and 30 so movable with the engine crankshaft, such as the that when shaft is rotated the arms will be "25 distributor @am shaft reciprocated so as to be intermittently moved 25 An important object of the present invention into and away from electrical contact with stais to provide means for preventing actuation of a tionary points I I and 20, respectively. Points reciprocating member as described above at fast- I0 and II are connected to the usual ignition coil er than a. predetermined rate, 28 for producing a high tension current which is 30 Another object is to providemeans for ope'ratled to the spark plugs by the `wires 3i.

ing a fluid pumping device from an engine, to- Switch 'l includes-

contact elements

32 and 33 getherwith means for preventing reciprocation of which, upon actuation of the switch button, sithe pumping piston or diaphragm at an excessive multaneously connect both the ignition circuit rate, and the fuel pumping circuit -with battery 4. Another object is to provide means for con- Pumping device I4 includes a magnetic coil 35 35 trolling the rate' of vibration of va`breaker arm connected at one end to electrical lead 23 and such asis ordinarily associated with a rotating grounded at the other end as. at 36. Device I4 cam in an engine distributor or the like. is shown secured to frame I5 by a bracket 3l and These objects and 4other more detailed objects obviouslyV suitable insulation `must be provided 40 hereafter appearing are attained substantially between the coil and the frame since the ground- 40 by the structure illustrated in the accompanying of the various electrical units, as customary, ing drawing in which: is effected through the framing.-

Fig. 1 is a diagrammatic view showing a por- Coil 35 is wound about a hollow core 3B and is tion of an internal combustion engine and assoenclosed within a. housing or lcasing 39. A '46 cigted parts and mechanisms. threaded boss 40 communicates with the interior 45 Fig 2 is a, top view gf the distributor. housing of core 33 and provides an inlet opening for with the cover remand, connection with tube I6 from the fuel tank. `A Fig. 3 is a sectional view of the pumping deseparate cap member 42 is bolted to the opposite vice, Y end of casing 39 and is provided with a threaded 5 Fig. 1 shows an engine I, mounting a distrib boss 43 providing an outlet opening for connec- 5 tor, generally indicated at 2, operated in the tion with tube I3 leading to the carburetor. A usual manner byashaft extending through housdiaphragm 44 of a suitable fuel resistant maing 3 and geared or otherwise connected to the terial is securedbetween casing 39 and end memengine cam shaft (not shown). A battery 4 is ber 42 and has a 4central orifice 45. A valve I6 grounded, as at l, and connected by a lead 6 to housing member 4'0 has a grooved boss 41 lx1-55 extending over a substantial portion of the surface of the diaphragm. A cup-shaped armature member 49 abuts the opposite face of diaphragm 44 and with the diaphragm forms a iluid tight seal with grooved boss 41. Armature '49 is disposed to be drawn toward coil 35 when the latter is energized. A coiled spring 50 inside core 38 bears against groovedboss 4l and constantly urges the same and diaphragm 44 toward the a left or away from coil 35.

Associated with'seating shoulder 5l in housin member 46 is a disc valve SZ-Iorming an outlet check, the valve being constantly urged toward its seat by coiled spring 53. At the inner end oi' inlet boss 40 ls a cageA 54 receiving an inlet check dise 55. l

Inl operation, intermittent making and breaking of circuit and breaker points 20 and 2| causes reciprocation of diaphragm 49, which in turn draws fuel through boss 40, past check 55 into the interior of core 38 and forces the same past outlet check 52 into tube l2 connecting with the car-- buretor oat bowl.

The arrangement of the diaphragm and check valve is such that any pressure in the fuel tank is utilized to assist in forcing fuel tothe carburetor bowl. It has I'been found that a pumping device as shown will not operate eillciently i1' the diaphragm eciprocations exceed approximately` 1500 per nute. Internal combustion engines of the automotive type ordinarily operate at4000 R. P. M. or more at the highest speeds and in order to prevent Vdiaphragm 44 from following the engine revolutions at such high speeds, I provide the novel pulsation dampeningdevice shown 'in Fig.'2. This device comprises a leaf spring i reciprocating rate of diaphragm 44.

In case shaft 25is rotating at al speed which would otherwise cause arm 2| 'and'diaphragm 44 to reciprocate at too fast a rate, spring element 60 will resist such tendency and, in fact,v will prevent'reciprocationiof the arm at a rate faster than the natural vibration vrate of weighted spring. Obviously the length of spring 840 and the .weight of element l! must be correlated with spring 29 and arm 2| to insure proper dampening 2,166,901 serted in orifice 45 and a broad base portion 48.

of breaker arm vibrations at high motor speeds.

The novel pulsation dampening device is particularly advantageous when used in connection with a pumping device of the type described, but the use thereof is not exclusively limited thereto. The novel pumping device shown is very effective for pumping fuel in a system as shown, due to the fact that a continuous stream of liquid can be supplied. Various elements of the motor and vehicle framing are conventional and may be modled as desired. The invention and associated structure may be modified in various respects as will occur to those skilled in the art and the exclusive use of all such modiiications as come within the scope of the appended claims is contemplated.

I claim:

l. In a circuit breaker of the class describedya movably mounted member, means vfor yieldingly reciprocating said member, said means being normally operable at varying rates, and a vibrating element carried by said member so as to mechanically inuence the-reciprocations of said member according to the natural vibrating period of said element.

2. A device as specied in claim 1 in which said vibrating element comprises elongated structure having a part secured to said reciprocating member and having another part. free to vibrate naturally.

. 3.' A device as specied in claim 1 in which said means comprises a spring constantly urging said reciprocating member in one direction and mechanism for causing intermittent positive movement of said member against said means.

4. A device as speciied in claim 1 in which said vibrating element comprises a leaf spring secured 4at'one end to said reciprocating member4 and with the other end free for vibrating.

5. In a device of the class described, a reciprocating member, yielding means constantly urging said member in one direction, mechanical means for intermittently moving said member at a variable -rate in the opposite direction against said yielding means, and a leaf spring element secured to said member and having a portion free for vibrating naturally whereby the rate of reciprocation of said member is inuenced by thevnatural vibrating period ofsaid spring element.

6. A device as speciied in claim 5 in` which weight structure is provided on the vibrating part of said spring element, the weight of said structure and the length and resilience of said spring i element being correlated with said reciprocating member and the yielding means operating thereon so that said member cannot reciprocate faster than the vibrating period of said spring element.

IRVEN E. COFFEY.