US2278745A - Automobile starting and accessory circuit - Google Patents

Description

April l7, 1942.v

Filed June 3, 1939 W. E. ST. GEORGE` AUTOMOBILE STARTING AND ACCESSORY CIRCUIT 2 Sheets-Sheet l fr; Z f

i 30' i 4 fari r y/ il A Inventor mazza E sf.' epyje Attorneys *April 7, 1942. n W E. 5T GEQRGE 2,278,745

AUTOMOBILE STARTING AND ACCESSORY CIRCUIT Filed June 3, 1939 2 sheets-sheet 2 Inventor Walzer E SZ eofye.

A Homey:

vention.

PatentedApr. 7,1942

2,218,745 sUromonm-z STARTING AND Accessoirs Cmovrr Walte'r Edmond St. George, Rochester, Minn. Application June 3, 1939, Serial No. 277,303

(Cl. 29d-36) Claims.

, My invention relates to improvements in electrical systems for automobiles and the like and provides means whereby the operator can selectively utilize the output o! the ordinary battery for energizing the starter motor or utilize the combined voltage of the ordinary battery and of a second battery, so as to simultaneously relieve the ordinary battery oi all load ordinarily lmposed by the starter whilev augmenting the ordinary battery with the output of the second battery forl cranking the engine, and an important object of the present invention is to provide a simple and eillcient arrangement of this character.

Other important objects and advantages o! the invention will be apparent from the following description in connection with the drawings showing a preferred embodiment of the in- In the drawings'- j Figure l is a transverse vertical sectional view taken through Figure 6 and looking toward the right.

Figure 2 is a similar view looking toward the left.

Figure 3 is a transverse vertical sectional view taken throughFigure l.l

Figure 4 is a schematic wiring diagram showing the switch positioned for combined output of the two batteries to operate the starter motor. Figure 5 is a similar view showing the switch in inoperated normal position.

Figure y6 is a similar view showing the switch operated to connect the ordinary battery and,

preparatory to bringing in the auxiliary battery in a step by step operation of the switch..

Referring" in detail to the drawings, the nu, meral 5 generally dcsignatesthe switch which includes a suitable rectangular casing 3 provided at one end with a removable cover 1. At the opposite end ci the casing the opposed side walls 3, 3 have respective pairs of contact posts I3, II and I2, I3 which are transversely spaced and insulated from the casing walls. Adjacent the coverequipped end, oi' the casing astandard Il projects from the wall I5 on which are pivoted the small ends ot a pair ot tapered arms I3, I1 which are insulated from the standard I4, and from each other. and have individual binding posts I3, I3, respectively. Cross arms 2l, 2| are respectively secured to the larger ends of the said arms and these cross arms have on their opposite ends respective contacts 22, 23 and 2l, 25. The arms It, I1 may be swung together or rela'- tive to each other so that, for instance, the arm I6 may engage its contact 22 ywith the casing contact I3, while the arm I1 may at the same time have its contact 24 disengaged from the casing contact II but engaged with the casing contact I3. A mechanical connector 26 is ilexibly connected at its opposite ends to the arms I6 and I1 and an expanding spring 21 mounted on pegs 23, 23 on the element 2t and on the casing wall 3 urges the arms It, I1 toward the normal or initial position illustrated in Figures 3 and 5.`

Individual operators for the switch arms comprise two similar headed plungers 30, 3l working I through insulated bushings 32, 33 in the wall 3 of the casing, each plunger being provided with an adjustable stop collar 34, 35 to engage the corresponding bushing in the fully retracted position of the plunger. The ends of the plungers outside the casing are connected by a relatively ilexible bar 36 by means oi' which either or both of the plungers may be selectively pushed into the casing to move one or both of the switch arms out oi' engagement with the casing contacts I2, I3 and into engagement with. one or both of the casing contacts Il, II.4

In accordance with the present invention the casing contacts II and I2 are permanently connected by a strap 31, the `contact I2 also being connected to one side of the conventional ammeter 38, it being understood that 'to this ammeter are also connected the ignition system, lights, horn, etc., and any other electrical accessories such as a heater, radio or the like, all

comprised within the term load" as hereinafter y mentioned.v The remaining side oi' theammeter is connected Ato the voltage regulator 33 on the conventional generator l0. The casing contact II is connected' to the positive side of the ordinary battery 4I whose negative side is grounded at l2. The auxiliary battery 43 has its positive side connected to the binding post I3 of the switch arm It, while the Anegative side of the auxiliary battery is connected to the binding post It ot the switch arm I1. The casing contact Il is connected to one side of the starter motor M whose remaining side is grounded at Il. The casing contact I3 is grounded at u.

Withr the actuator bar 38 in its normal initml position the switch exhibits engagement of the contacts 23, I2 and 2l, I3 as illustrated inFlm-lre 5 whereby the electrical system is conditioned for charging by the generator, the batteries being in parallel.

With the actuator operated to'push both of-v position shown in Figure 4, the contacts in enare I2. il and Il, il. respectively,

whereby the auxiliary battery Il is connected the ordinary battery ll inseries so that the voltage is availed of for application to the starter motor.

mth one side of the actuator bar It pressed fm' instance. the left side thereof, only the Although I have shown and described herein a preferred embodiment of the invention, it is to be lmderstood that I do not limit the application of the invention thereto. except as required by the scope of the subioined claims.

ving described the invention,

what isf 1. A device of the character described comprisamabrschetonsaidsupportapair switch arms mounted for dexing on the same m said bracket and insulated therefrom from Qcb other. said switch arms being independently of each other, each switch arm comprising a pair of laterally spaced contacts. a-flrst and a second pair of spaced and operatively connecting said switch arms, expanlion dill/means expanding between one side of-idiiexiblemeansandapartofsaidsupwherein the switch arms are normally posieach with one of the said laterally spaced contacts thereof in engagement with the corresponding ones of the contacts on the support. and manual means on said support having parts engageable selectively with one or both of said switch arms for moving the same out or its or their normal podtion or positions and into a position or positions in which the corresponding one ol' ones of said laterally spaced contacts ensage the corresponding one or ones of the second pair of contacts on said support.

2. A device according to claim l wherein one of the said ilrst pair of contacts is permanently electrically connected to one of the contacts of said second pair of contacts.

3. A device according to claim 1 wherein one of the said iirst pair of contacts is permanently electrically connected to one of the contacts of said second pair of contacts. combined with a i'lrst battery having its negative side grounded and its positive side connected to one of said second pair of contacts, a secondbattery having its posi tive side connected to one of said switch arms and its negative side connected to the remaining switch arm, a starter motor having one side grounded and its remaining side connected to the remaining one of said second pair of contacts, a generator having one side grounded and its remaining side connected to one of said iirst pair of contacts, the remaining one of said first pair of contacts being grounded, an ammeter having connected thereto accessory battery circuit, and means connecting said ammeter in circuit'between said generator and the said one of the first pair of contacts.

4. A device of the character described comprising a generator having a grounded terminal and an n'ngrounded terminal, a main battery having a grounded terminal and an ungrounded terminal connected to the ungrounded terminal of the generator, an electric starter motor having a grounded terminal and an ungrounded terminal, an auxiliary battery having a rst lungrounded terminal connectible to the ungrounded terminal of said main battery, said auxiliary battery having a second ungroundedY terminal connectible to the ungrounded terminal of said starter motor, and switch means operable to connect said second terminal of the auxiliary battery with the ungrounded terminal of the starter motor, thus placing the starter motor in series with the auxiliary battery alone or in series with the ungrounded terminal of the main battery, said switch means comprising a pair of independently movable conductive rock arms insulated from each other, a first pair o! insulated contacts and a second pair of insulated contacts spaced on the oppositey side of said rock arms from said first pair of contacts, said pairs having their component contacts opposed whereby said rock arms can be moved independently of each other to engage selected ones of said component contacts on the same or on diflerent sides of said rock arms or moved simultaneously to engage the component contacts at one side only of said rock arms.

5. 'I'he combination recited by claim 4 wherein one of the contacts oi' said ilrst pair is connected to said ungrounded side of the starter motor with the remaining contact oi said rst pair connected to the ungmunded side of said main battery, said second pair of commis having one contact connected witll the second mentioned contact of the rst pair and with the ungrounded side of said generator, the remaining contact of the second pair being grounded.

WALTER EDMOND ST. GEORGE.

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