US2070994A - Backfiring release for automatic starting mechanism - Google Patents

Backfiring release for automatic starting mechanism Download PDF

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Publication number
US2070994A
US2070994A US589739A US58973932A US2070994A US 2070994 A US2070994 A US 2070994A US 589739 A US589739 A US 589739A US 58973932 A US58973932 A US 58973932A US 2070994 A US2070994 A US 2070994A
Authority
US
United States
Prior art keywords
engine
lever
starting
backward rotation
automatic starting
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
US589739A
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English (en)
Inventor
William L Mcgrath
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.)
Eclipse Machine Co
Original Assignee
Eclipse Machine 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 Eclipse Machine Co filed Critical Eclipse Machine Co
Priority to US589739A priority Critical patent/US2070994A/en
Priority to FR750455D priority patent/FR750455A/fr
Priority to DEE43848D priority patent/DE611384C/de
Priority to GB2752/33A priority patent/GB418579A/en
Application granted granted Critical
Publication of US2070994A publication Critical patent/US2070994A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/10—Safety devices
    • F02N11/101—Safety devices for preventing engine starter actuation or engagement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • 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
    • F02N1/00—Starting apparatus having hand cranks
    • F02N1/005—Safety means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2710/00—Control of valve gear, speed or power
    • F01L2710/006—Safety devices therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
    • F02D2400/11—After-sales modification devices designed to be used to modify an engine afterwards
    • 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
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/04—Starting of engines by means of electric motors the motors being associated with current generators
    • 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
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/087—Details of the switching means in starting circuits, e.g. relays or electronic switches
    • 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
    • F02N2250/00—Problems related to engine starting or engine's starting apparatus
    • F02N2250/04—Reverse rotation of the engine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/11—Tripping mechanism
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20396—Hand operated
    • Y10T74/20402—Flexible transmitter [e.g., Bowden cable]

Definitions

  • This invention relates to a backfiring release for automatic starting mechanism and more particularly to a device for preventing operation of an automatic starting mechanism during back- 5 ward rotation of the engine to be started.
  • Another object is to provide such a device which may readily be applied to existing types oi! automatic starting mechanism without extensive alteration thereof.
  • a further object is to provide such a device which is entirely mechanical in its operation.
  • Another object is to provide such a device which cooperates with the automatic. starting mechanism in such manner that the usual time delay is interposed between the release 01 the backfire releasing mechanism and the reoperation of the automatic starting mechanism.
  • a further object is to provide such a device in which the usual control elements 01 the automatic starting mechanism are operated by a manual connection with the engine whereby the automatic starting mechanism is rendered in operative in response to backward rotation oi the engine.
  • Fig. 1 is a semi-diagrammatic showing oi! a preferred embodiment of the invention, the operating means for the backfire release being shown in section substantially on the line
  • Fig. 2 is a section taken substantially on the line 22 of Fig. 1;
  • Fig. 3 is a detail showing a modified form of operating means for the backfire release with the parts in their normal or inoperative positions, sectioned on line 3-3 of Fig. '7;
  • Fig. 4 is a view similar to Fig. 3 showing the positions of the parts during backward rotation of the engine;
  • Fig. 5 is a similar view showing the parts in the positions assumed when backward rotation oi the engine ceases;
  • Fig. 6 is a similar view showing the parts in the positions assumed when the engine comes to rest after rearward rotation thereof.
  • Fig. 7 is a side view partly in section on the line l--1 of the structure shown in Fig. 3.
  • Fig. l of the drawings there is illustrated an electrical starting system for an internal combustion engine, not shown, including a battery I, grounded at 2 and connected by a lead 3 to an automatic starting mechanism indicated generally at 4, including a magnetic 5 starting switch 5.
  • Starting switch 5 is connected through a single turn coil 8 and a lead I to a starting motor SM which is grounded at I to complete the starting circuit.
  • Starting switch I is actuated by a solenoid I 10 which is energized irombattery I by a control circuit including battery lead 8, ignition switch ll, leads l2 and I3, stationary contact I and movable contact I! on spring strip it which is grounded at ll to complete the control circuit.
  • a solenoid I 10 which is energized irombattery I by a control circuit including battery lead 8, ignition switch ll, leads l2 and I3, stationary contact I and movable contact I! on spring strip it which is grounded at ll to complete the control circuit.
  • Means are provided for preventing energization of the solenoid 9 to close the starting switch 5 while the engine is sell-operative.
  • Such means are here shown as a lever II pivoted at I9 and arranged to be operated by a plunger 2i whereby a roller 22 on the end or said lever engages a weight member 23 on the end 01' the spring strip and bends the same backward, moving contact II out 01 engagement with contact I, thus breaking the control circuit.
  • is op- 25 erated by a voltage coil 24 which is connected by a lead 28 to the starting motor side of the starting switch I and which is grounded at 26.
  • Plunger 2! is retained in its lower position while the engine is self-operative by a generator coil 30 21 connected by a lead 28 to the generator G and also grounded at 28.
  • Means are also provided for preventing the immediate reactuation oi the starting mechanism when the engine stops, in order to allow time for the engine to stop oscillating and come completely to rest.
  • this means comprises the weight 23 pendulously mounted on the spring strip i8 and arranged to be set in vibration by the release oi the lever i8 whereby the control circuit is not efiectively closed until the weight 23 has, ceased vibrating. This time delay period is predetermined to allow suflicient time for the engine to come completely to rest.
  • this means comprises a member such as a collar 29 mounted on a rotary element of the engine such as a shaft ll for limited backward rotation therewith, and a mechanical connection such as a Bowden wire I! from the collar 29 to the lever II.
  • Collar 29 is normally retained in its forward or releasing position by yielding means such as a spring II, this position being defined by an adjustable stop II which engages a pin II fixed to said collar.
  • Collar 29 is frictionally connected to a sleeve II as by means of friction shoes I1, and sleeve II is connected by means of an overrunning clutch including pivoted dogs II with a collar II which is suitably keyed to shaft II as indicated at II.
  • the dogs II are so arranged that backward rotation of shaft II will carry the sleeve II therewith, but forward rotation of said shaft causes the dogs to overrun the sleeve and to be moved outward by centrifugal force so as not to engage the sleeve while the engine is self-operative in a forward direction.
  • the Bowden wire I2 is provided with an adjustable stop II for limiting the motion of said shaft in a direction to operate the lever II.
  • closure of the ignition switch II causesenergization of the solenoid I to close the starting switch I, causing the engine to be cranked. If the engine starts properly, the lever II is moved downward-by the plunger II to open contacts II, II in the usual manner, and the plunger 2I is retained in this position by the generator coil 21. If the engine should backfire, however, the generator coil 21 is inoperative to hold the plunger'II in its lower position, and the lever II would be released to allow reactuation of the starting mechanism. The backward rotation of the engine shaft II, however, is transmitted to the collar 2I which actuates the Bowden wire I2 come to rest against contact II.
  • an emergency connection for the control circuit may be provided to secure restarting.
  • a connection is here illustrated in the form of a push button II which may be. located conveniently to the operator, depression of which will complete the control circuit whereby restarting of the engine will take place.
  • Figs. 3 to 7 inclusive there is illustrated a modified form of operating means for the Bowden wire I2 whereby the operation of the device is completely automatic so that the push button It is unnecessary and so that a quick release of the Bowden wire I2 is provided.
  • This quick release assures the normal operation of the lev r I in vibrating the weight 23 to secure the usual time delay in the case of backfire, the same as in the case of engine stall after normal operation.
  • the Bowden wire I2 instead of being connected directly' to the collar 28 is pivoted at II to the end of a lever II which is hinged at II to said collar.
  • Lever II is Yieldably urged toward its normal position as shown in Fig. 3 by suitable means such as a spring II and is held in such position by means of a latch I2 pivoted at 53 to the collar 28 and having a nose II normally extending over the tip II'of lever II.
  • Latch I2 is yieldably urged against a stop I6, defining its locking position, by means such as a spring 51.
  • collar 29 is yieldably-maintained by the spring II with its pin II against the stop II in the same manner as previously described, and is provided with the frictional one-way connection to the engine shaft II as previously. described, this connection being illustrated in section in Fig. '7.
  • Means for releasing the Bowden wire connection between the collar 2I and lever II when backward rotation of the engine ceases is provided in the form of a bracket II fixedly mounted in such a position that a finger II thereon will engage the inner end of latch I2 just prior to the time when pln II of collar 2I engages the backstop I2.
  • latch I2 is thus withdrawn from its engagement with lever II, allowing the lever to move out until the tip II thereof engages beneath a retaining lug II on bracket II.
  • An automatic starting system for internal combustion engines including a starting switch
  • An automatic starting system for internal combustion engines including a magnetic starting switch, a control circuit therefor including a pair of contacts, means for opening said contacts when, the engine starts, and a connection between a moving part of said engine and said opening means, arranged to operate said opening means upon reverse rotation of the en ine.
  • An automatic starting system for an internal combustion engine having a rotating part including a starting switch, a member connected to said rotating part (or backward rotation therewith, and means whereby backward rotation of said member causes said starting switch to be opened.
  • An automatic starting system for an internal combustion engine having a rotathis part including a starting switch, a member having a one-way driving connection with the rotating part which is effective during reverse rotation of said part, and means responsive to reverse rotation of said member for opening said starting switch.
  • An automatic starting system for an internal combustion engine having a rotating part including a starting switch, a member having a one-way driving connection with the rotating part which is eflective during reverse rotation of said part, means for opening the starting switch when the engine starts, and means for actuating said opening means responsive to reverse rotation of said member.
  • an automatic for an internal combustion engine having a rotating part, including a starting switch, a member connected to said rotating part for backward rotation there-- with, means responsive to backward rotation of said member for holding said starting switch open, and means for delaying reclosure of said starting switch for a predetermined time after such backward rotation ceases.
  • An automatic starting system for an internal combustion engine having a rotating part including a starting switch, means responsive to backward rotation of said part for opening said switch, means whereby subsequent forward rotation thereof releases said opening means, and means for delaying reciosure of the starting switch until a predetermined time after the release of said opening means.
  • an element adapted to be operated to prevent actuation of the starting mechanism, operating means for said element responsive to self-operation of the engine, operating means for said element responsive to backward rotation ofthe engine.-and means for releasing said element when the backward rotation of the engine stops.
  • an element adapted to be operated to prevent actuation of the starting mechanism, operating means for said element responsive to self-operation of the engine, operating means for said element responsive to backward rotation of the engine, including a member moved by such backward rotation. an operative connection between said member and said element, and means for disabling said connection when the backward rotation of the engine ceases.
  • an element adapted to be operated to prevent actuation of the starting mechanism, operating means for said element responsive to self-operation of the engine, oper-- ating means for saidelement responsive to backward rotation of the engine including a member moved by such backward rotation, an operative connection between said member and said element, means for disabling said connection when the backward rotation of the engine ceases, and
  • an internal combustion engine having'a movable part, an automatic starting mechanism for said engine including a magnetic starting switch, a control circuit there-- for including a pair of contacts, means operated by said engine part for opening said contacts,
  • an internal combustion engine having a rotatable part, an automatic starting mechanism for said engine including a magnetic starting switch, a control circuit therefor including a pair of contacts, means responsive to reverse rotation of the engine for opening said contacts, and means ior,vibrating said contacts to delay effective closure thereof for a predetermined time after cessation of said reverse rotation.
  • an internal combustion engine having a movable part, an automatic starting mechanism for said engine including a magnetic starting switch, a control circuit therefor including a pair of contacts, one of which is pendulously mounted and biased to closed position, and means operated by said engine part for swinging said pendulously mounted contact to open saidcontacts.
  • an internal combustion engine having a rotatable part, an automatic starting mechanism for said engine including a magnetic starting switch, a control circuit therefor including a pair of contacts, one of which is pendulously mounted and biased to closed position, means operated by reverse rotation of said engine part for swinging said pendulously mounted contact to open said contacts, and means effective on the cessation of such reverse rotation for quickly releasing said contact to cause vibration thereof prior to closing of the contacts.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
US589739A 1932-01-29 1932-01-29 Backfiring release for automatic starting mechanism Expired - Lifetime US2070994A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US589739A US2070994A (en) 1932-01-29 1932-01-29 Backfiring release for automatic starting mechanism
FR750455D FR750455A (fr) 1932-01-29 1933-01-27 Perfectionnements aux dispositifs antiretour pour mécanismes automatiques de démarrage
DEE43848D DE611384C (de) 1932-01-29 1933-01-27 Selbsttaetige Anlassvorrichtung fuer Kraftfahrzeuge
GB2752/33A GB418579A (en) 1932-01-29 1933-01-28 Improvements in and relating to electric starting devices for internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US589739A US2070994A (en) 1932-01-29 1932-01-29 Backfiring release for automatic starting mechanism

Publications (1)

Publication Number Publication Date
US2070994A true US2070994A (en) 1937-02-16

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US589739A Expired - Lifetime US2070994A (en) 1932-01-29 1932-01-29 Backfiring release for automatic starting mechanism

Country Status (4)

Country Link
US (1) US2070994A (fr)
DE (1) DE611384C (fr)
FR (1) FR750455A (fr)
GB (1) GB418579A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474487A (en) * 1947-06-10 1949-06-28 Bendix Aviat Corp Backfire circuit breaker
US2528160A (en) * 1946-09-23 1950-10-31 Bendix Aviat Corp Backfire protective device
US4798185A (en) * 1987-12-17 1989-01-17 White Consolidated Industries, Inc. Stress-limiting flexible throttle lever apparatus for a gasoline engine driven power tool or the like

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2528160A (en) * 1946-09-23 1950-10-31 Bendix Aviat Corp Backfire protective device
US2474487A (en) * 1947-06-10 1949-06-28 Bendix Aviat Corp Backfire circuit breaker
US4798185A (en) * 1987-12-17 1989-01-17 White Consolidated Industries, Inc. Stress-limiting flexible throttle lever apparatus for a gasoline engine driven power tool or the like

Also Published As

Publication number Publication date
GB418579A (en) 1934-10-29
DE611384C (de) 1935-03-27
FR750455A (fr) 1933-08-11

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