US3702959A - Electric control mounting, notably for motorized lift truck - Google Patents

Electric control mounting, notably for motorized lift truck Download PDF

Info

Publication number
US3702959A
US3702959A US131899A US13189971A US3702959A US 3702959 A US3702959 A US 3702959A US 131899 A US131899 A US 131899A US 13189971 A US13189971 A US 13189971A US 3702959 A US3702959 A US 3702959A
Authority
US
United States
Prior art keywords
relay
contact
relays
terminal
battery
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
US131899A
Other languages
English (en)
Inventor
Andre Le Gloan
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.)
BREV ET D APPLIC TECHNOLOGIQUE
Soc D'etudes De Brevets Et D'applications Technologiques Sebat
Original Assignee
BREV ET D APPLIC TECHNOLOGIQUE
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 BREV ET D APPLIC TECHNOLOGIQUE filed Critical BREV ET D APPLIC TECHNOLOGIQUE
Application granted granted Critical
Publication of US3702959A publication Critical patent/US3702959A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/02—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles characterised by the form of the current used in the control circuit
    • B60L15/04—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles characterised by the form of the current used in the control circuit using dc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
    • B61L5/10—Locking mechanisms for points; Means for indicating the setting of points
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/03—Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Definitions

  • a H ti M Dam motor driving assembly incorporating a two-position 1 orelgn pp ca on on y switch providing a low starting speed and a higher or Aplll 10, 1970 France ..7013027 normal travel speed, a reversing Switch for operating the motor in either direction, and a safety cut-out [52] US. Cl. ..318/139, 318/440, 290/50, switch adapted to be actuated by an obstacle likely to 290/17 be struck by the front of the truck, a pair of relays of [51] Int. Cl.
  • the present invention relates to electric mountings or circuit means for controlling the movements of a movable mechanical unit, such as a motorized fork lift truck or pallet-handling truck, with a relatively low starting speed.
  • a movable mechanical unit such as a motorized fork lift truck or pallet-handling truck
  • the electric control means or mounting according to the present invention is characterized in that the motor of the vehicle, of the dc. type, is supplied with current from two similar storage batteries through a coupler adapted to connect said batteries either in parallel for low-speed starting or in series for normal operation at a higher speed; according to an essential feature characterizing this invention the control mounting further comprises a reversing switch for reversing the direction of rotation of the dc. motor.
  • This invention is also concerned with a coupler and a reversing switch of the electromagnetic relay type, adapted to be incorporated preferably in the mounting broadly described hereinabove;
  • the coupler or reversing switch according to this invention is characterized in that it consists essentially of a pair of relays of known type each comprising a coil and a plunger core having one end located within said coil and adapted to actuate a front contact, its opposite end projecting from the coil, and that a back contact is provided by disposing a first contact stud at the outer end of said plunger core of each relay and securing to an insulating support of said relay another contact stud in such a position that the first contact stud engages the second contact stud only when the relevant relay is de-energized.
  • This arrangement of the coupler and reversing switch according to the present invention is particularly advantageous, notably from an economical point of view, in that these switching appliances-comprise essentially the combination ofrelays of a type currently available on the marketat a relatively low price, due notably to the fact that they comprise each only one front contact, these relays being adapted to be modified according to the present invention at a relatively moderate cost to incorporate each an additional back contact.
  • FIGS. 1 and 2 are a front elevational view and a side elevational view, respectively, of an electromagnetic relay adapted to be used in the practical embodiment of this form of embodiment of the invention
  • FIG. 3 is a wiring diagram of the control mounting of this invention.
  • a motorized fork lift truck or pallet handling truck i.e., a self-propelled vehicle of well known type for transporting and handling loads and materials and adapted to be controlled by an operator standing on the front end of the vehicle notably by means of a two-position push-button switch providing the low-speed starting and normal operation,at a higher speed, of the vehicle, and also by means of a reversing lever providing forward and reverse operation of the vehicle.
  • the present invention is applicable to theelectric control of the movements of any desired movable mechanical element or machine driven from a dc. motor.
  • the passage from low starting speed to higher normal speed, on the one hand, and the reversal of the direction of travel, on the other hand, are obtained by means of a coupler and a reversing switch, respectively, and these coupler and reversing switch consist each essentially of a pair of electromagnetic relays of the type illustrated diagrammatically in FIGS. 1 and 2 of the drawing.
  • each relay of the pair consists of a conventional relay of known type, easily available on the market, and comprising an energizing coil 1, having end terminals 2 and 2', and a plunger core having one end disposed within the coil 1 and adapted to actuate a frontcontact (not shown) for interconnecting two terminals 3 and 3, the other end 4 of said plunger core projecting from the coil 1 and being visible in FIGS. 1 and 2.
  • the outer end 4 of the plunger core comprises a return coil spring 5 retained by a metal washer 6 secured to the lower outer end of plunger core 4 by means of a screw, likewise of metal, not shown in FIGS. 1 and 2.
  • a single-contact relay of this type is relatively inexpensive.
  • This modification of relays easily available in the trade consists essentially in substituting, for the screw normally retaining the metal washer 6 in position, a screwthreaded rod 7 of insulating material, and slipping on said metal washer 6 another washer 8 but of insulating material and also the end of a first electric conductor, notably a conductor lug terminal 9; these members 6, 8 and 9 are then tightened to the outer end 4 of the plunger core by means of a metal nut 10 engaging the screw-threaded rod 7 and constituting the first stud of the back contact to be formed.
  • the other contact stud ll of this back contact is carried by a metal bracket 12 secured in turn to the supporting plate 13 of suitable insulating material to which the relay coil 1 is secured by means of bolts such as 14; the bracket 12 is secured to the supporting plate 13 by means of at least one metal bolt such as 15, the end of another electric conductor, for example a lug terminal 16, being inserted between the metal bracket 12 and the metal nut screwed on bolt 15.
  • the position of bracket 12 in relation to coil 1 is so selected that the first stud 10 of the back contact engages the second stud l 1 only when said coil is de-energized, i.e., when the plunger core is partially pulled out from the coil by the force of return spring 5.
  • FIG. 3 of the drawing comprises four electromagnetic relays of the type illustrated in FIGS. 1 and 2 and described hereinabove.
  • Two relays 17 and 18 constitute the essential component elements of a coupler adapted to connect a pair of similar storage batteries 19, 19 in parallel or in series for supplying current to the d.c. motor of the truck, the armature winding 20 and field winding 21 of this motor being connected in series; however, in the specific form of embodiment illustrated the coil or winding 22 of an electromagnetic brake is inserted between the armature and field windings of this motor.
  • Another pair of relays of the same type, denoted 23 and 24, are the essential component elements of a reversing switch adapted,when actuated, to reverse the direction of rotation of the d.c. motor 20,21.
  • the coupler comprising according to this invention two relays 17, 18 of the above described type as well as a reversing switch for reversing the direction of rotation of the electric motor, which switch comprises likewise two relays 23,24 also of the same type, are extremely economical in comparison with similar couplers and reversing switches of conventional or hitherto known design as now available in the trade.
  • the reference numerals 25a, 25b and 26a, 26b designate the first and second sides of the back contacts of relays 17 and 18, respectively, and the reference numerals 27a, 27b, 28a, 28b designate the first and second sides of their front contacts, respectively; furthermore, reference numerals 27 and 28 designate the movable contact studs rigid with the plunger cores of relays 17 and 18, respectively; according to an essential feature characterizing this invention, the first sides 25a and 26a of the back contacts of both relays l7 and 18 are interconnected and their second sides 25b and 26b are connected to terminals of opposite polarities of the two batteries, respectively, notably the positive terminal of battery 19' and the negative terminal of battery 19; on the other hand, the two sides 27a and 27b of the front contact of relay 17 are connected to the negative terminals of both batteries 19' and 19, respectively, and
  • the two sides 28a and 28b of the front contact of relay 18 are connected to the positive terminals of batteries 19" and 19, respectively.
  • the reference numerals 29a, 29b and 30a, 30b designate the two sides of the back contacts of relays 23 and 24, respectively
  • reference numerals 31a, 31b and 32a, 32b designate the first and second sides of the front contacts of these relays 23 and 24, respectively
  • the reference numerals 31 and 32 designate the movable contact studs of the same front contacts, respectively.
  • the first sides 29a and 30a of the back contacts of both relays 23 and 24 are connected in common to the terminal 33 of the armature winding 20 of the d.c.
  • the other side 29b or 30b of the back contact of each relay 23, 24 is connected to the first side 310 or 32a, of the front contact of the same relay 23 or 24 and, on the other hand, the first sides 31a and 32a of the front contact of both relays 23 and 24 are connected to the two terminals 34 and 35, respectively, of the field winding 21 of said d.c. motor.
  • the two lines 36, 36 connected to the positive terminal of battery 19 and to the negative terminal of battery l9',respectively, are connected the former in common to the second sides 31b, 32b of the front contacts of both relays 23 and 24, and the latter to the other terminal 37 of the d.c. motor armature 20 through a fuse 38.
  • the coupler consisting essentially of relays 17 and 18 may be actuated by the operator through the medium of a push-button control switch 39 having two contact positions. In a first position this switch 39 closes a pair of contacts 40, 40' without opening another pair of contacts 50, 50', and in its other or second position it opens both contacts 50, 50 without re-opening saidcontacts 40, 40'.
  • the operator may reverse the direction of rotation of the d.c. motor 20, 21 and therefore the direction of travel of the motorized fork lift truck or like vehicle, by simply reversing the position of a control lever 51, so that the conducting arm 52 thereof is moved from its position of engagement with a contact stud 52a, connected to one terminal of the coil winding of relay 23, to its position of engagement with the other contact stud 52b connected to one terminal of the coil winding of the other relay 24.
  • the opposite ends of the coils of relays 23 and 24 are connected in common to the negative supply line 36' via a fuse 53.
  • the conducting arm 52 of reversing lever 51 is connected on the other hand to one side of the contact 50' of the above-mentioned two-position push-button switch 39, but this connection takes place through a back contact 54 of a safety push-button switch 55 to be described hereinafter.
  • This safety push-button switch 55 is disposed at the front of the fork lift truck or other vehicle equipped with the electric mounting of this invention, so as to be actuated by any obstacle likely to be struck by the vehicle during its forward travel; however, this obstacle may be the operator himself.
  • this safety push-button switch 55 comprises a pair of front contacts, i.e., front contact 56 mounted in parallel to contact 50 of saidtwo-position push-button 39, and front contact 57 havingone side connected to contact stud 52b of reversing lever 51 and the other side connected to the common point of the movable contacts 40' and 50' of said two-position push-button control switch 39.
  • the opening of contact 54 opens the circuit (2) described hereinabove and therefore de-energizes the relay 23, while closing contact 57 so as to energize the coil of relay 24 through the following circuit:
  • circuit (1)v is opened at the level of contact 50, both relays 17 and 18 are de-energized and as a consequence of the opening of their front contacts and the closing of their back contacts the two batteries 19, 19 are connected in series to lines 36 and 36 through the following circuit:
  • This backward movement begins at low speed when the main push-button switch 39 is set in its first position, and may if desired continue at normal, higher speed when the driver depresses the same push-button 39 to its other or second position, the two relays 17 and 18 being energized only in the first case through the above-described circuit 1).
  • the control mounting for motorized fork lift truck of which the wiring diagram is illustrated in FIG. 3 comprises in addition a motor-pump unit for supplying fluid under pressure to the hoisting cylinder, this unit being driven from a d.c. motor having its field winding 59 and via the fuse 53 and a control push-button switch 65.
  • An electric mounting for controlling the energizing circuit of a d.c. motor for driving a movable element comprising a coupler for connecting two poles of said energizing circuit to first and second batteries of substantially identical characteristics, said first and being connected to each other, the back contact of said first relay on the other side thereof being connected to the first terminal of said second battery, the back contact of said second relay on the other side thereof being connected to the said secondterminal of said first battery, the front contact of said first relay on one side thereof being connected to the second terminal of said second battery, the front contact of said first relay on the other side thereof being connected to the second terminal of said first battery, the front contact of said second relay on one side thereof being connected to the first terminal of said first battery, the front contact of said second relay on one side thereof being connected to the first terminal of said first battery, the front contact of said second relay on the other side thereof being connected to the first terminal of said second battery, and means to simultaneously energize said first and second relays for starting said movable mechanical element at low speed, and to simultaneously
  • An electrical mounting according to claim 1 further comprising an armature and a field winding connected in series to each other, a reversing switch for reversing the direction of rotation of said d.c. motor, said reversing switch including third forward motion and fourth reverse motion relays, each of said third and fourth relays including a set of back contacts and a set of front contacts, the back contacts of said third and fourth relays on one side thereof being connected to one of the terminals of said armature, the back contact of said third relay on the other side thereof being connected to the front contact of said third relay on one side thereof, the back contact of said fourth relay on the other side thereof being connected to the front contact of said fourth relay on one side thereof, the front contact of said third relay on one side thereof also being connected to one side of said field winding and the front contact of said fourth relay on said one side thereof also being connected to the other side of said field winding, the front contact of said third and fourth relays on the other side thereof being connected to said first pole of said energizing circuit, and the
  • safety means including a push-button switch mounted to the front of said movable mechanical element, said safety means being adapted, when said pushbutton switch is actuated, to control the energization means of said first and second relays, and, if said third relay is pre-energized to further de-energize said third relay and energize said fourth relay thereby reversing the direction of said movable element.
  • At least one of said first, second, third and fourth relays includes a coil and a plunger core having one end disposed within said coil and adapted to actuate the set of front contacts thereof, the back contact set of said relay including a first contact stud disposed on the outer end of said plunger coure of said relay and a second contact stud, and an insulating support for the second contact stud of the said back contact provided outside of said coil and in front of said front contact stud for engaging said second contact stud only when said relay is de-energized.
  • the invention according to claim 4 further comprising a coil return spring for said plunger core, a screw-threaded rod of insulating material connected to said plunger core, a metal washer disposed on the outer end of said rod, a washer of insulating material disposed on said metal washer, a metal clamping nut engaging said screw-threaded rod and constituting the first contact stud of said back contact, wherein one end of a first conductor is inserted between said insulating washer and said nut, a metal bracket and a metal bolt adapted to secure said bracket to said insulating support wherein a second conductor is adapted to be in-

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Breakers (AREA)
US131899A 1970-04-10 1971-04-07 Electric control mounting, notably for motorized lift truck Expired - Lifetime US3702959A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7013027A FR2086847A5 (da) 1970-04-10 1970-04-10

Publications (1)

Publication Number Publication Date
US3702959A true US3702959A (en) 1972-11-14

Family

ID=9053777

Family Applications (1)

Application Number Title Priority Date Filing Date
US131899A Expired - Lifetime US3702959A (en) 1970-04-10 1971-04-07 Electric control mounting, notably for motorized lift truck

Country Status (9)

Country Link
US (1) US3702959A (da)
JP (1) JPS465257A (da)
BE (1) BE765094A (da)
DE (1) DE2117211A1 (da)
ES (1) ES390013A1 (da)
FR (1) FR2086847A5 (da)
GB (1) GB1330232A (da)
LU (1) LU62902A1 (da)
NL (1) NL7104751A (da)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3736480A (en) * 1972-02-11 1973-05-29 J Lee Battery run d-c motor speed control, charging and steering systems
US3805127A (en) * 1971-06-03 1974-04-16 Ampex Motor drive circuit
US3809978A (en) * 1972-09-08 1974-05-07 J Zubris Circuit for electrically-operated vehicle
US3836788A (en) * 1973-06-28 1974-09-17 Gen Motors Corp Internal combustion engine cranking motor circuit
US4082987A (en) * 1972-09-21 1978-04-04 Societe Anonyme Automobiles Citroen Method and control device for switch means adapted to modify the coupling of groups of elements of an electrochemical generator supplying an electric motor
US4152633A (en) * 1973-10-12 1979-05-01 Modern Production Ab Electrically driven vehicle
US4563621A (en) * 1983-12-07 1986-01-07 Travis Electronics, Inc. Speed control circuit for golf carts and the like
US4639646A (en) * 1985-02-04 1987-01-27 Kransco Manufacturing, Inc. Two pedal, three-way control for child's riding toy
US20110221210A1 (en) * 2010-03-10 2011-09-15 Denso Corporation Engine starting system with high-and low-speed modes of motor operation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129234A (en) * 1982-10-28 1984-05-10 Vessa Ltd Powered wheelchair having improved control circuit
CN103407356B (zh) * 2013-07-09 2016-07-13 郑州飞机装备有限责任公司 用于纯电动汽车的电池组悬挂机构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2725488A (en) * 1951-10-03 1955-11-29 Leece Neville Co Series-parallel switch and battery circuit
US3168688A (en) * 1962-12-07 1965-02-02 Yale & Towne Inc Battery fed plural motor control system for an industrial truck
US3179198A (en) * 1959-06-08 1965-04-20 Clark Equipment Co Industrial truck
US3249836A (en) * 1963-02-18 1966-05-03 Westinghouse Electric Corp Motor control system for battery-powered vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2725488A (en) * 1951-10-03 1955-11-29 Leece Neville Co Series-parallel switch and battery circuit
US3179198A (en) * 1959-06-08 1965-04-20 Clark Equipment Co Industrial truck
US3168688A (en) * 1962-12-07 1965-02-02 Yale & Towne Inc Battery fed plural motor control system for an industrial truck
US3249836A (en) * 1963-02-18 1966-05-03 Westinghouse Electric Corp Motor control system for battery-powered vehicle

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805127A (en) * 1971-06-03 1974-04-16 Ampex Motor drive circuit
US3736480A (en) * 1972-02-11 1973-05-29 J Lee Battery run d-c motor speed control, charging and steering systems
US3809978A (en) * 1972-09-08 1974-05-07 J Zubris Circuit for electrically-operated vehicle
US4082987A (en) * 1972-09-21 1978-04-04 Societe Anonyme Automobiles Citroen Method and control device for switch means adapted to modify the coupling of groups of elements of an electrochemical generator supplying an electric motor
US3836788A (en) * 1973-06-28 1974-09-17 Gen Motors Corp Internal combustion engine cranking motor circuit
US4152633A (en) * 1973-10-12 1979-05-01 Modern Production Ab Electrically driven vehicle
US4563621A (en) * 1983-12-07 1986-01-07 Travis Electronics, Inc. Speed control circuit for golf carts and the like
US4639646A (en) * 1985-02-04 1987-01-27 Kransco Manufacturing, Inc. Two pedal, three-way control for child's riding toy
US20110221210A1 (en) * 2010-03-10 2011-09-15 Denso Corporation Engine starting system with high-and low-speed modes of motor operation
US8513825B2 (en) * 2010-03-10 2013-08-20 Denso Corporation Engine starting system with high- and low-speed modes of motor operation

Also Published As

Publication number Publication date
FR2086847A5 (da) 1971-12-31
JPS465257A (da) 1971-11-27
DE2117211A1 (de) 1971-11-04
NL7104751A (da) 1971-10-12
ES390013A1 (es) 1973-06-01
GB1330232A (en) 1973-09-12
BE765094A (fr) 1971-08-16
LU62902A1 (da) 1971-08-24

Similar Documents

Publication Publication Date Title
US3702959A (en) Electric control mounting, notably for motorized lift truck
GB1499273A (en) Vehicles with power-assisted steering
US4418778A (en) Battery operated forklift with a motor driven power steering system
US4132934A (en) Electric motor driven vehicles
KR20000062740A (ko) 호이스트, 특히 소형 호이스트의 권상기용 제어 구동 장치
NL8700159A (nl) Bedieningsinrichting voor een beweegbaar deel, bestemd voor het openen en sluiten van een opening, in het bijzonder een voertuigschuif/hefdak.
US2211985A (en) Across-the-line motor starter with cushioned start
US2539987A (en) Electrically operated truck and battery charging control therefor
US1138212A (en) Electric switch.
US2539191A (en) Regenerative braking control
JPS6194999A (ja) 電動トロリ付き電動チエ−ンブロツクの速度制御装置
GB2030529A (en) Circuit controlling the energisation of power steering in a battery powered vehicle
US1414403A (en) System of control
US3319143A (en) Control unit for windshield wiper
US2140564A (en) Motor control
US983063A (en) Motor-controlling switch.
US3187285A (en) Speed control for electric truck
US1164038A (en) Electric-motor controller.
US668030A (en) Means for stopping electromotors.
GB1486559A (en) Pulse control circuits
JP2535624Y2 (ja) オールテレンクレーン車のエンジン停止回路
US1237518A (en) Motor-controller.
US2650966A (en) Electrical contactor
JPS6011601U (ja) デツドマンスイツチ付きバツテリ車の安全装置
US3832680A (en) Hazard warning signal device for use in automotive vehicle