US3419115A - Starter safety switch on clutch pedal - Google Patents

Starter safety switch on clutch pedal Download PDF

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Publication number
US3419115A
US3419115A US637823A US63782367A US3419115A US 3419115 A US3419115 A US 3419115A US 637823 A US637823 A US 637823A US 63782367 A US63782367 A US 63782367A US 3419115 A US3419115 A US 3419115A
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United States
Prior art keywords
starter
clutch pedal
switch
clutch
safety switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US637823A
Inventor
Theodore L Glenn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ford Motor Co
Original Assignee
Ford Motor Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ford Motor Co filed Critical Ford Motor Co
Priority to US637823A priority Critical patent/US3419115A/en
Priority to DE19681763144 priority patent/DE1763144C/en
Priority to DE6605988U priority patent/DE6605988U/en
Priority to GB22006/68A priority patent/GB1176615A/en
Priority to FR1565216D priority patent/FR1565216A/fr
Application granted granted Critical
Publication of US3419115A publication Critical patent/US3419115A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H01H21/22—Operating parts, e.g. handle
    • H01H21/24—Operating parts, e.g. handle biased to return to normal position upon removal of operating force
    • H01H21/26—Operating parts, e.g. handle biased to return to normal position upon removal of operating force adapted for operation by a part of the human body other than the hand, e.g. by foot
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
    • F16H59/56—Inputs being a function of the status of the machine, e.g. position of doors or safety belts dependent on signals from the main clutch

Definitions

  • ABSTRACT OF THE DISCLOSURE that bore, and the cam for operating the switch is formed on that portion of the shaft covered by the pedal.
  • This invention relates to starter safety switches for preventing the starter motor of the vehicle from being operated while the clutch is engaged.
  • Vehicles e.g. automobiles, trucks, and tractors, usually are provided with a starter safety switch in a starter motor control circuit to prevent the starter from being operated except when the drive line is disengaged, as by depressing the clutch or placing the gear shift lever in neutral position.
  • the starter safety switch is mounted directly on the clutch pedal adjacent its pivotal mounting and is operated by a cam on the clutch pedal shaft so as to close the electrical circuit between the starter solenoid and a manually operated start switch whenever the clutch pedal is depressed to disengage the clutch and to interrupt the circuit upon release of the clutch pedal. Accordingly, the starter is operable only when the clutch is disengaged, thus preventing starting of the vehicle when the drive line is connected to the engine.
  • FIGURE 1 is a schematic drawing of a starter motor control circuit for a vehicle, incorporating the starter safety switch organization of the present invention.
  • FIGURE 2 is a side elevation of the organization, including a portion of the clutch pedal, the supporting clutch pedal shaft, the starter safety switch, and a portion of the clutch release rod.
  • FIGURE 3 is an elevation of the parts shown in FIG- URE 2, from the left of that figure.
  • FIGURE 4 is a cross section through the clutch pedal, shaft and safety switch taken on the line 4-4 of FIG- URE 3.
  • Vehicles provided with manual shift transmissions e.g., automobiles, trucks, and tractors, conventionally are provided with a clutch interposed between the engine and the drive line, including the transmission.
  • a starter safety switch in the circuit between the manually operated start switch (which 3,419,115 Patented Dec. 31, 1968 usually is combined with a key-operated ignition switch) and a solenoid controlling operation of the starter.
  • the starter safety switch may either be placed on the transmission and be in the closed position only when the transmission is in neutral position, or it may be closed by depressing the clutch pedal to disengage the clutch and thereby interrupt the drive line.
  • the starter safety switch of the present invention is of the latter type.
  • FIGURE 1 This circuit includes a battery 10, a combined ignition and starter switch 11, and a starter motor 12.
  • the solenoid 14 mounted on the starter motor controls operation of the starter motor by actuation of an electrical switch (not shown), connecting the starter motor directly to the battery.
  • the starter safety switch 15 of the present invention is interposed in the circuit between the ignition and start switch 11 and the solenoid 14. When the starter safety switch is open, the circuit to the solenoid 14 is interrupted and the starter cannot be operated. When the switch 15 is closed, the circuit between the starter switch 11 and the solenoid is completed and the starter can be operated by means of the start switch 11.
  • the starter safety switch 15 is mounted directly on the clutch pedal 16 of the vehicle.
  • the clutch pedal 16 is provided with a transverse bore 17 adjacent its upper end which is received on a stationary clutch pedal shaft 19 mounted on a portion 18 of the vehicle.
  • a snap ring 20 received within a circumferential groove at the outer end of the shaft 19 retains the clutch pedal.
  • the clutch pedal 16 may also be provided with an arm portion 21 pivotally receiving a clutch release rod 22 which is connected with the vehicle clutch (not shown).
  • a clutch release rod 22 which is connected with the vehicle clutch (not shown).
  • the clutch pedal 16 is shown in clutch-engaged position. By depressing the clutch pedal, the pedal is rotated clockwise as viewed in the drawings to release the clutch.
  • the starter safety switch comprises a pluglike body 24 provided with screw threads threadingly engaged within a bore 25 in the clutch pedal intersecting the bore 17 for receiving the clutch pedal shaft.
  • Flats 26 may be provided on the body for engagement with a wrench to facilitate insertion or removal of the switch 15 from the clutch pedal.
  • the body 24 of the switch includes a pair of spaced contacts 27 in the head 29 of the switch which are connected with wires 30 and 31 leading to the manual starter switch 11 and the solenoid 14, as indicated in FIGURE 1.
  • the circuit between the contacts 27 is completed by a movable disclike member 32 which is carried by a shank and head portion 34.
  • a spring 33 surrounding the shank of part 34 permits overtravel of part 34 after the member 32 engages the contacts 27.
  • the assembly of part 34 and member 32 is biased away from the contacts 27 by a spring 35.
  • the switch 15 is cam operated by means of a ball 36 and plunger 37 received within a bore 39 coaxial with the body 24 of the switch.
  • the metal surrounding the outer end of the bore may be swaged over slightly or a stripped bore otherwise provided to retain the ball and plunger.
  • a fiat 40 is formed on the clutch pedal shaft 19 to serve as a cam for operating the switch 15.
  • the flat is located on that portion of the shaft received within the bore 17 of the clutch pedal so as to act directly on the ball 36 of the switch.
  • the starter safety switch organization above described is dependable and is not readily subject to damage or to misadjustment. Moreover, the tolerances of the parts are critical to its operation. Provided that the fiat 40 is properly positioned when assembling the clutch pedal shaft 19 on to the tractor, the switch 15 Will be dependable in operation and no further adjustment is necessary. Moreover, the moving parts are enclosed and thus protected from weather and from damage during operation of the vehicle.
  • a starter for controlling operation of the starter and a cam operated safety switch in said circuit, said switch being mounted on the clutch pedal, and a stationary cam located adjacent the clutch pedal and positioned to operate the switch to complete the circuit through the switch upon operation of the pedal to disengage the clutch.
  • the clutch pedal being mounted for limited rotary movement on a stationary supporting shaft
  • the switch-operating cam being located on the shaft
  • the safety switch being mounted on the clutch pedal adjacent the shaft and having a portion engaged and operated by the cam.
  • the clutch pedal having a bore for receiving the shaft and an intersecting bore for receiving the safety switch, the portion of the shaft within the shaft-receiving bore having a cam surface for operating the switch.
  • the safety switch being spring-biased to open position and being moved to closed position by the cam upon operation of the clutch pedal to release the clutch.

Description

Dec. 31, 1968 'r. L. GLENN STARTER SAFETY SWITCH 0N CLUTCH PEDAL Filed May 1i, 1967 lav/ 7:13 f; r H
I NVEN TOR. 7742 0002: .4. GZf/V/V A ATTORNEY United States Patent 3,419,115 STARTER SAFETY SWITCH 0N CLUTCH PEDAL Theodore L. Glenn, Troy, Mich., assignor to Ford Motor Company, Dearborn, Mich., a corporation of Delaware Filed May 11, 1967, Ser. No. 637,823 4 Claims. (Cl. 192-.02)
ABSTRACT OF THE DISCLOSURE that bore, and the cam for operating the switch is formed on that portion of the shaft covered by the pedal.
This invention relates to starter safety switches for preventing the starter motor of the vehicle from being operated while the clutch is engaged.
Vehicles, e.g. automobiles, trucks, and tractors, usually are provided with a starter safety switch in a starter motor control circuit to prevent the starter from being operated except when the drive line is disengaged, as by depressing the clutch or placing the gear shift lever in neutral position. In the present invention, the starter safety switch is mounted directly on the clutch pedal adjacent its pivotal mounting and is operated by a cam on the clutch pedal shaft so as to close the electrical circuit between the starter solenoid and a manually operated start switch whenever the clutch pedal is depressed to disengage the clutch and to interrupt the circuit upon release of the clutch pedal. Accordingly, the starter is operable only when the clutch is disengaged, thus preventing starting of the vehicle when the drive line is connected to the engine. By mounting the starter safety switch on the pedal, there is a reduced chance of malfunction or maladjustment, and a simpler more dependable construction is obtained.
Among the objects of the present invention are to provide an improved starter safety switch organization which is simple and dependable in operation; which is not sub ject to getting out of adjustment; which is easily and economically assembled; and generally to improve starter safety switch organizationof the type described.
Other objects and objects relating to details and economies of construction will be more apparent from the detailed description to follow.
FIGURE 1 is a schematic drawing of a starter motor control circuit for a vehicle, incorporating the starter safety switch organization of the present invention.
FIGURE 2 is a side elevation of the organization, including a portion of the clutch pedal, the supporting clutch pedal shaft, the starter safety switch, and a portion of the clutch release rod.
FIGURE 3 is an elevation of the parts shown in FIG- URE 2, from the left of that figure.
FIGURE 4 is a cross section through the clutch pedal, shaft and safety switch taken on the line 4-4 of FIG- URE 3.
Vehicles provided with manual shift transmissions, e.g., automobiles, trucks, and tractors, conventionally are provided with a clutch interposed between the engine and the drive line, including the transmission. In order to prevent starting the engine while the drive line is connected, it is common to interpose a starter safety switch in the circuit between the manually operated start switch (which 3,419,115 Patented Dec. 31, 1968 usually is combined with a key-operated ignition switch) and a solenoid controlling operation of the starter. The starter safety switch may either be placed on the transmission and be in the closed position only when the transmission is in neutral position, or it may be closed by depressing the clutch pedal to disengage the clutch and thereby interrupt the drive line. The starter safety switch of the present invention is of the latter type.
Referring now to the drawings, the starter control circuit is indicated in FIGURE 1. This circuit includes a battery 10, a combined ignition and starter switch 11, and a starter motor 12. The solenoid 14 mounted on the starter motor controls operation of the starter motor by actuation of an electrical switch (not shown), connecting the starter motor directly to the battery.
The starter safety switch 15 of the present invention is interposed in the circuit between the ignition and start switch 11 and the solenoid 14. When the starter safety switch is open, the circuit to the solenoid 14 is interrupted and the starter cannot be operated. When the switch 15 is closed, the circuit between the starter switch 11 and the solenoid is completed and the starter can be operated by means of the start switch 11.
Referring now to FIGURES 2 and 3, the starter safety switch 15 is mounted directly on the clutch pedal 16 of the vehicle. The clutch pedal 16 is provided with a transverse bore 17 adjacent its upper end which is received on a stationary clutch pedal shaft 19 mounted on a portion 18 of the vehicle. A snap ring 20 received within a circumferential groove at the outer end of the shaft 19 retains the clutch pedal.
The clutch pedal 16 may also be provided with an arm portion 21 pivotally receiving a clutch release rod 22 which is connected with the vehicle clutch (not shown). In FIGURES l, 2 and 3, the clutch pedal 16 is shown in clutch-engaged position. By depressing the clutch pedal, the pedal is rotated clockwise as viewed in the drawings to release the clutch.
Referring now to FIGURE 4, the starter safety switch comprises a pluglike body 24 provided with screw threads threadingly engaged within a bore 25 in the clutch pedal intersecting the bore 17 for receiving the clutch pedal shaft. Flats 26 may be provided on the body for engagement with a wrench to facilitate insertion or removal of the switch 15 from the clutch pedal.
The body 24 of the switch includes a pair of spaced contacts 27 in the head 29 of the switch which are connected with wires 30 and 31 leading to the manual starter switch 11 and the solenoid 14, as indicated in FIGURE 1.
The circuit between the contacts 27 is completed by a movable disclike member 32 which is carried by a shank and head portion 34. A spring 33 surrounding the shank of part 34 permits overtravel of part 34 after the member 32 engages the contacts 27. The assembly of part 34 and member 32 is biased away from the contacts 27 by a spring 35.
The switch 15 is cam operated by means of a ball 36 and plunger 37 received within a bore 39 coaxial with the body 24 of the switch. The metal surrounding the outer end of the bore may be swaged over slightly or a stripped bore otherwise provided to retain the ball and plunger.
A fiat 40 is formed on the clutch pedal shaft 19 to serve as a cam for operating the switch 15. Preferably, the flat is located on that portion of the shaft received within the bore 17 of the clutch pedal so as to act directly on the ball 36 of the switch.
When the clutch pedal is positioned as indicated in FIGURES 1 and 2, the ball 36 of the switch is riding on the flat 40 of the clutch pedal shaft, and the vehicle clutch is engaged. In this position of the clutch pedal 16, the starter safety switch 15 is open and the starter motor 12 cannot be operated. Upon depressing the clutch pedal to disengage the clutch, the ball 36 of the switch rolls along the flat 40 as the pedal turns on the shaft 19 until the ball reaches the cylindrical portion of the shaft 19. About this time, the ball 36 and plunger 37 have forced the member 32 against its spring bias into position to complete the circuit between the spaced contacts 27, thus completing the circuit between the start switch 11 and the solenoid 14 so that the starter can be operated.
The starter safety switch organization above described is dependable and is not readily subject to damage or to misadjustment. Moreover, the tolerances of the parts are critical to its operation. Provided that the fiat 40 is properly positioned when assembling the clutch pedal shaft 19 on to the tractor, the switch 15 Will be dependable in operation and no further adjustment is necessary. Moreover, the moving parts are enclosed and thus protected from weather and from damage during operation of the vehicle.
What is claimed is:
1. In a vehicle having an engine, a drive line, a clutch for connecting the engine and drive line and a clutch pedal for releasing the clutch: a starter, an electrical circuit for controlling operation of the starter and a cam operated safety switch in said circuit, said switch being mounted on the clutch pedal, and a stationary cam located adjacent the clutch pedal and positioned to operate the switch to complete the circuit through the switch upon operation of the pedal to disengage the clutch.
2. In a vehicle as claimed in claim 1, the clutch pedal being mounted for limited rotary movement on a stationary supporting shaft, the switch-operating cam being located on the shaft, and the safety switch being mounted on the clutch pedal adjacent the shaft and having a portion engaged and operated by the cam.
3. In a vehicle as claimed in claim 2, the clutch pedal having a bore for receiving the shaft and an intersecting bore for receiving the safety switch, the portion of the shaft within the shaft-receiving bore having a cam surface for operating the switch.
4. In a vehicle as claimed in claim 3, the safety switch being spring-biased to open position and being moved to closed position by the cam upon operation of the clutch pedal to release the clutch.
References Cited UNITED STATES PATENTS 2,013,189 9/1935 Sayre. 2,104,159 1/ 1938 Hemingway 192.02 2,597,606 5/1952 Winkler 192-.02
BENJAMIN W. WYCHE III, Primary Examiner.
US. Cl. X.R.
US637823A 1967-05-11 1967-05-11 Starter safety switch on clutch pedal Expired - Lifetime US3419115A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US637823A US3419115A (en) 1967-05-11 1967-05-11 Starter safety switch on clutch pedal
DE19681763144 DE1763144C (en) 1967-05-11 1968-04-10 Safety switching device
DE6605988U DE6605988U (en) 1967-05-11 1968-04-10 SAFETY SWITCHING DEVICE
GB22006/68A GB1176615A (en) 1967-05-11 1968-05-09 Starter Safety Switch
FR1565216D FR1565216A (en) 1967-05-11 1968-05-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US637823A US3419115A (en) 1967-05-11 1967-05-11 Starter safety switch on clutch pedal

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US3419115A true US3419115A (en) 1968-12-31

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US637823A Expired - Lifetime US3419115A (en) 1967-05-11 1967-05-11 Starter safety switch on clutch pedal

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US (1) US3419115A (en)
DE (1) DE6605988U (en)
FR (1) FR1565216A (en)
GB (1) GB1176615A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3709344A (en) * 1971-12-13 1973-01-09 Allis Chalmers Clutch and brake pedal with neutral safety switch
US3766342A (en) * 1972-05-26 1973-10-16 Chrysler Corp Switch responsive to brake pedal movement
US3985196A (en) * 1974-07-22 1976-10-12 International Harvester Company Single switch safety start system
US4978177A (en) * 1989-07-06 1990-12-18 Nartron Corporation Signal mechanism responsive to force applied to vehicular brake pedal and the like
US5010972A (en) * 1989-07-06 1991-04-30 Nartron Corporation Combination vehicular braking and accessory control system
US5137338A (en) * 1991-02-11 1992-08-11 Nartron Corporation Combination vehicular braking and accessory control system
US5217280A (en) * 1989-07-06 1993-06-08 Nartron Corporation Pressure sensitive signal device for vehicle brake pedal
US20060154782A1 (en) * 2004-11-25 2006-07-13 Luk Lamellen Und Kupplungsbau Beteiligungs Kg System for ensuring the ability to start an internal combustion engine contained within a drive train

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10116486A1 (en) * 2001-04-03 2002-10-10 Bayerische Motoren Werke Ag Starting abort system and method for an internal combustion engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2013189A (en) * 1932-02-17 1935-09-03 Remowen Corp Automatic controller for internal combustion engine starters
US2104159A (en) * 1936-01-24 1938-01-04 Electrolock Mfg Company Starter switch control
US2597606A (en) * 1946-12-21 1952-05-20 Bendix Aviat Corp Engine starting device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2013189A (en) * 1932-02-17 1935-09-03 Remowen Corp Automatic controller for internal combustion engine starters
US2104159A (en) * 1936-01-24 1938-01-04 Electrolock Mfg Company Starter switch control
US2597606A (en) * 1946-12-21 1952-05-20 Bendix Aviat Corp Engine starting device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3709344A (en) * 1971-12-13 1973-01-09 Allis Chalmers Clutch and brake pedal with neutral safety switch
US3766342A (en) * 1972-05-26 1973-10-16 Chrysler Corp Switch responsive to brake pedal movement
US3985196A (en) * 1974-07-22 1976-10-12 International Harvester Company Single switch safety start system
US4978177A (en) * 1989-07-06 1990-12-18 Nartron Corporation Signal mechanism responsive to force applied to vehicular brake pedal and the like
US5010972A (en) * 1989-07-06 1991-04-30 Nartron Corporation Combination vehicular braking and accessory control system
US5217280A (en) * 1989-07-06 1993-06-08 Nartron Corporation Pressure sensitive signal device for vehicle brake pedal
US5137338A (en) * 1991-02-11 1992-08-11 Nartron Corporation Combination vehicular braking and accessory control system
US20060154782A1 (en) * 2004-11-25 2006-07-13 Luk Lamellen Und Kupplungsbau Beteiligungs Kg System for ensuring the ability to start an internal combustion engine contained within a drive train
US7381148B2 (en) * 2004-11-25 2008-06-03 Luk Lamellen Und Kupplungsbau Betelligungs Kg System for ensuring the ability to start an internal combustion engine contained within a drive train

Also Published As

Publication number Publication date
DE1763144B2 (en) 1972-10-26
GB1176615A (en) 1970-01-07
FR1565216A (en) 1969-04-25
DE6605988U (en) 1970-08-27
DE1763144A1 (en) 1972-02-24

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