US2213160A

US2213160A - Engine starter control

Info

Publication number: US2213160A
Application number: US258441A
Authority: US
Inventors: Manuel H Elkin
Original assignee: Bendix Aviation Corp
Current assignee: Bendix Aviation Corp
Priority date: 1939-02-25
Filing date: 1939-02-25
Publication date: 1940-08-27
Anticipated expiration: 1957-08-27

Description

Aug. 27, 1940. M. H. ELKIN 2,213,160

ENGINE STARTER CONTROL Filed Feb. 25. 1939 2 Sheets-Sheet l Aug. 27, 1940. M. H. ELKIN 2,213,160

ENGINE STARTER CONTROL Filed Feb. 25. 1939 2 Sheets-Sheet 2 MMIII/Willlullin-EMM 7 1N VENTOR.

l Patented ug. 27, 1940v` ,rrED' STATES PATENT NFFICE aclaren ENGINE smoren CONTROL Application February 25, i939, Serial No. 258.4% e claims.: (ci. 29o-3o) which is adapted for remote control as by means of a push button switch on a control board or inn strument panel.

it is a further object to provide such a device in. which the battery voltage initially` applied to the starting motor by closure of the starting switch is reduced by a resistor in the startingv circuit, which resistor is shunted by a lswitcl'ito energize the starting motor from the iull battery voltage after a predetermined time. A further object is to provide such a device in which closure oi the shunting switch is automatically delayed for a predetermined time after closure of the starting switch.

.Another object is to provide such a device in 'which the shunting switch is arranged to open prior to the opening of the starting switch to reduce the current flow to be broken by the opening oi the starting switch.

Further objects and advantages will be ap- -J5 parent from the following description taken in connection with the accompanying drawings in which:

iig. l is a semi-diagrammatic illustration of a starting system embodying a preierred iorin il@ oi the invention; v

' r'g. 2 is a similar view oi a second embodinient; and

Fig. 3 is a detail oi the mechanical interlocking switch control oi Fig. Zshowing the parte in cranling position.

in Fig. l of the drawings `there is illustrated a v starting circuit including a battery l grounded at 2 and connectedby a lead 3 to a magnetic starting switch indicated generally by numeral d.

'Starting switch l comprises xed contacts Sand t and a movable contact l mounted on a niag- 'netic plunger il which is arranged to be actuated by a solenoid 9 to effect closure or" the starting switch.. Contact B is connected by alead il to a resistor l2 having a suitable value for re= SM which is grounded at ld toA complete the startt is another object to provide such a device.

ducing the voltage oi the battery during the initial energization o the starting circuit. Resistor l2 is connected by a lead i3 to the starting motor lng circuit.

It will be understood that the starting motor is provided with suitable gearing of conventional type for engaging and actuating a member of the engine to be started, and since these parts are in the usual form, it is deemed unnecessary l@ vto illustrate them in detail.

/i control circuit ior the solenoid 9 oi the starting switch is provided comprising a manually operaole switch which may be in the form oi a push button mounted on an instrument panel or control board. Snitch is connected by a lead it to the battery lead and by a lead il to one end oi solenoid Q, the opposite end oi which is grounded i5 to complete the control circuit. 2li

Means for bridging the resistor i2 to apply the iull battery voltage to the starting motor, is provided comprising bridging switch indicated generally by numeral Bridging switch comprises a fixed contact l 'r nich is connected 25 to and may be 'iormed lly with the contact oi the starting ser contact '22 and a movable conta a magnetic plunger 2d. Contact is co n c oy a lead to the starting circ it v3@ el solenoid is provided `for actua plunger 2d to close the bridging switch a control circuit for the solenoid is provided including a second contact on the .manual ES to one end oi the solenoid end oi solenoid 2G is connected j a lead fined Contact 3l. A movable contact anchored and grounded at one end as indicated d@ at Si and carries at its iree end a weight or bob l Means are provided ior'norinally holding contacts Si, 32 open and for causing closure there# of' a predetermined time ai'er closure oi the d5 starting switch. As here shown, this actuating means comprises a lever 38 pivoted at and provided with a roller Sii adapted to engage the boo S5 of the vibrator time delay and bend the pendulous strip 33 to hold open contacts Si, 32. 5o

'A pinA 3Q iixed in the side of the lever Sii is arranged to engage in a channel ll in a collar l2 dried in any suitable way on the end of the plunger 8 of the starting switch whereby closure of the starting switch swings the lever 3B downward, 55

bration, and after a predetermined time delay;k

contacts 3|, 32 close and complete the control circuit yfor the bridging switch |9. A

Springs 43 and 48 are provided for normally maintaining the switches d. and I9 open as illust'rated, and the assembly of the two magnetic switches with thevibrator time delay is preferably enclosed in2 a suitable box 85 on which the' resistor |2 may be mounted if so desired in order to form a self-contained commercial unit. In the operation of this device, closure of -the manual switch |5 rst effects closure of thecontrol circuit for the starting switch 8 whereby the plunger 8 is actuated to close the starting switch and to release and set in vibration the time delay `reed 33. Further pressure `on the manual switch I5 causes engagement of contact 21 thereof whereby the control circuit for the bridging switch is completed up t the contact 3|. Clos'ure of the starting switch 4 causes initial energization of the starting motor at a voltage reduced by the-resistor l2 to a suitable value for effecting engagement of the starter gearing. After a predetermined time delay, contact 32 Means areprovided for normally Aholding

contacts

18, 19 open so as to open the control circuit 5 for solenoid 12 of the bridging switch, in the form comes to rest against contact 3|, thus completing the control circuit for the bridging switch I9,

shuntedout and the full battery voltage applied .to the starting motor for cranking purposes.

When the engine starts, release of the manual switch l5 rst breaks the control circuit for the bridging switch 4|9 at contact 2L Switch |9. thus-opens and re-introduces the resistor I2 into thestarting circuit, thus reducing the'ilow of current therethrough. Complete release of the manual switchi5 opens the control :circuit for the starting switch 8, which then opens and interrupts the starting circuit. It'will be noted of a lever 88 pivotally mounted at one end as indicated at 85 and provided at its Afree end with a roller 86 arranged to engage the bob 83 and starting switch 58 swings the lever 845 causing the roller 88 to roll down the inclined portion 89 of the bob andddisengage therefrom, thus setting the reed 8| in vibration and permitting

contacts

18, 19 to close after the vibration has ceased. Effective energization of the solenoid 12 is thus delayed for a predetermined time after closure of the starting switch 58,

According to the present invention, means are provided for holding the starting switch 5.4 closed until after the bridging switch 65 has opened. As here shown, this means comprises. a lever 9| pivoted at one end as indicatedat 92 and provided a t its free end with a roller 93 adapted when the bridging switch 65 Vis closed to engage the bob 83 as shown in Fig. 3 and prevent backward motion thereof ina direction to open

contacts

18, 19. 'I'he lever 88 .is then held in yits lower position by the bob 83, thereby locking the starting switch 54 closed. Means for'actuating lever 9| from the bridging switch plunger 1I isprovided in the that inasmuch as the starting switch 'is not required to break/the vfull cranking current ofthe circuit,- it may be made of; lighter `and more yeconomical 'construction than wouldpotherwise be possible, and the entire unit may be made of comparatively small dimensions; and light weight.

form of a pin 98 on the lever engaging in a flanged `collar 95 xed to plunger 1|.

. age to cause engagement of the starter gearing.

chanical control'is provided for ensuring that the bridging switch closes .last and opens rst. As there illustrated, a starting circuit is provided including a battery 5| grounded at 52 and connected by a lead 53 to a starting switch 54

comprisingnxed contacts

55 and 56 anda movable contact '51 carried by a magnetic plunger 58 actuated by plete the '.control, circuit therefor.

a solenoid. 59. Contact 58 is connected by va lead After a predetermined time of vibration, contacts' 18, 19 close, thus causing energization of solenoid 12 which closes the bridging switch 65 and ap-v plies the full battery voltage to the starting motor permitted to open, thus re-i'ntroducing the re- 1starting switch 54 ,is momentarili.-

closed by 6|to a resistor 62 which`is connected bya lead VA control circuit for solenoids Sgand 12 is vprovided comprising a manual switch such as a push button 13 connected by a lead 1,4 to -gthe battery lead 53 and by a1ead 15 to

solenoids

59 and 12. Solenoid 59 grounded vat 16 to come Solenoid 12 v- `is -connected by a lead 11 to a xed contact 18.

reason of thel engagement of the roller 86 of lever ,84 beneath the bob 83. When the bridging -switch 55 opens, however, lever `9| is raised out of engagement with the bob 83, thus permitting the'starting switch 54 vto open. Switch 54,`

circuit whereby arcing and burning of the contacts A'of the starting switch are prevented. Since y the proper sequence of operation bf the starting and bridging switchesis mechanically controlled in a. positive manner, it is obvious .that there is er and ess expensive constructiorgmay be .i no possibility of overloadingv the starting switchY Although but certain embodiments of the inventionvhave beenjshown and described in detail,- it will be understood that other embodiments.

. 2,218,166 are possible and various changes may be made in the design and arrangement oi the parts without departing from the spirit of the invention as deiined in the claims appended hereto.

What is claimed is:

l. In an engine starter control, a starting circuit including a battery, a starting motor, a startbit ing switch and a resistor, a control circuit for the starting switch'including a manual switch, a magnetic switchin shunt with the resistor, a control circuit for the shunt switch including said manual switch and a pair of normally open contacts, means operated by closure of the start'- ing switch for causing closure of said contacts, and means for vibrating said contacts a predetermined time before eective closure thereof.

2,. In an engine starter, a starting circuit in= cluding a battery, a' motor, a starting switch and a resistor for reducing the voltage of the battery initially applied to the motor, means including a magnetic switch for providing a bridging circuit around said resistor to apply full ybattery voltage to the starting motor,y manually controllable means for causing closure of the starting switch, a control circuit for said bridging switch including contacts closed by closure oi the starting switch, and means for deenergizing said control circuit while the starting switch remains closed.

3.' In combination with an engine starter including a battery, a starting motor and means responsive to energization of the starting motor for establishing a driving connection from the starting motor to a member oi the engine to be started, a two=stage starter control therefor including a magnetic starting switch, closure ci which energizes the starting motor sumciently to establish said drivingv connection, and a shunt switch, closure of which causes the full battery voltage to be applied to the starting motor, said starting switch comprising a movable member, a control circuit ior the shunt switch including a pair of contacts, one or which is pendulously mounted, and means operated by the movable member of the starting switch for holding the contacts open when the starting switch is open and for releasing and setting in vibration the pendulous contact when the starting switch closes. f

1i. In an engine starter, a battery, a starting motor, means including a magnetic starting switch and a resistor for applying reduced voltage from the battery to the motor, means including a'magnetic switch for bridging the resistor to apply full battery voltage to ther motor, and control circuits for said magnetic switches including a manual switch, closure of which causes energization iirst of the starting switch, then of the bridging switch, and opening of which` causes deenergization iirst of the bridging switch and then of the starting switch.

5. In an engine starter, a battery, a starting motor, means including a magnetic starting switch and a resistor tor lapplying reduced voltage from the battery to the motor, means including a magnetic switch for bridging the resistor to apply full battery voltage to the motor, control circuits for said magnetic switches including a manual switch, closure of which causes Venergization rst of the starting switch, then ci the bridging switch, and opening of ,which causes deenergization rst of the bridging switch and then of the starting switch, the control circuit for the bridging switch also including a pair of normally open contacts, and means actuated by closure of the starting switch for eiecting closure ci said contacts. l

6. In an engine starter control, a starting circuit including a magnetic starting switch and a resistor, a control circuit for the magnetic switch including 'a manual switch, a magnetic switch for bridging said resistor, a control circuit for the bridging switch including said manual switch, and means actuated by closure of the bridging switch for holding the starting switch closed.

7. In an engine starter control, a starting cir= cuit including a magnetic starting switch and a resistor, a control circuit for the magnetic switch including a manual switch, a magnetic switch for bridging said resistor, a control circuit for the bridging switch incuding said manual switch and a pair ci contacts, means actuated by closure oil the starting switch for closing said contacts, and means actuated by closure of the bridging switch for holding the starting switch closed.

8. In an engine starter control, a starting circuit including a magnetic starting switch and a resistor, a control circuit for the magnetic switch including a manual switch, a magnetic switch for bridging said resistor, a control circuit for the bridging switch including said manual switch and a pair of contacts, one of which is pendulously mounted, means actuated by the starting switch for holding the pendulously mounted contact open when the starting switch is open-and for setting the pendulous contact in vibration when the starting switch closes, and means actuated by closure of the bridging switch for so confining the contact controlling device as to prevent opening ofthe starting switch.

9. In a two-stage starter control for internal combustion engines, a starting switch, a resistor in series therewith, a shunt switch arranged to bridge the resistor, means actuated by the closing movement of the starting switch for causing closure of the shunt switch a predetermined time after closure of the starting switch, and manually operable means for opening rst the shunt switch v and then the starting switch.

MANUELEm.

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