GB2006999A - Precision speed switch control - Google Patents

Precision speed switch control

Info

Publication number
GB2006999A
GB2006999A GB7839326A GB7839326A GB2006999A GB 2006999 A GB2006999 A GB 2006999A GB 7839326 A GB7839326 A GB 7839326A GB 7839326 A GB7839326 A GB 7839326A GB 2006999 A GB2006999 A GB 2006999A
Authority
GB
United Kingdom
Prior art keywords
switch
signal
vehicle
circuit
threshold
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.)
Granted
Application number
GB7839326A
Other versions
GB2006999B (en
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.)
Woodward Controls Inc
Original Assignee
Woodward Controls Inc
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
Priority claimed from US05/839,193 external-priority patent/US4168516A/en
Application filed by Woodward Controls Inc filed Critical Woodward Controls Inc
Publication of GB2006999A publication Critical patent/GB2006999A/en
Application granted granted Critical
Publication of GB2006999B publication Critical patent/GB2006999B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/46—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring amplitude of generated current or voltage
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Velocity Or Acceleration (AREA)
  • Keying Circuit Devices (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Direct Current Motors (AREA)
  • Control Of Transmission Device (AREA)
  • Electronic Switches (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

A speed switch control comprises a permanent magnet AC generator 11 generating an AC signal varying in amplitude with shaft speed variations; the AC signal is rectified and compared at 12A with a regulated DC reference to generate first and second threshold signals indicative of shaft speeds over and under a critical value. A switch actuator circuit 21A develops "on" and "off" switch actuator signals, from the threshold signals to actuate a two-terminal semiconductor switch 13A between on and off conditions; the "off" signal is continuous but the "on" signal is a high-duty-cycle semi-continuous signal including brief recurring "off" intervals. A power storage/supply circuit 22A, connected in parallel with the switch terminals, which recharges during switch "off" intervals, affords the power supply for the threshold and switch actuator circuits 12A and 21A. The switch 13A opens or closes the circuit to a load 18 which may be an alarm, an interlock mechanism to prevent shifting the transmission of a vehicle into reverse whenever the vehicle is moving forwards, or an interlock to close or prevent opening the door of a passenger vehicle whenever the vehicle is moving above a critical speed. <IMAGE>
GB7839326A 1977-10-04 1978-10-04 Precision speed switch control Expired GB2006999B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/839,193 US4168516A (en) 1976-11-26 1977-10-04 Precision speed switch control

Publications (2)

Publication Number Publication Date
GB2006999A true GB2006999A (en) 1979-05-10
GB2006999B GB2006999B (en) 1982-11-24

Family

ID=25279098

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7839326A Expired GB2006999B (en) 1977-10-04 1978-10-04 Precision speed switch control

Country Status (4)

Country Link
CA (1) CA1096474A (en)
DE (1) DE2843278C2 (en)
FR (1) FR2405595A1 (en)
GB (1) GB2006999B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2542468A1 (en) * 1983-03-10 1984-09-14 G G Electricite Amplifier for position sensor
WO2001060454A1 (en) * 2000-02-18 2001-08-23 Heartsine Technologies, Inc. A defibrillator
WO2004105244A2 (en) 2003-05-15 2004-12-02 Touchsensor Technologies, Llc Two wire touch sensor interface

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3207950A (en) * 1962-10-15 1965-09-21 Eaton Mfg Co Control for electrical coupling apparatus
US3440433A (en) * 1966-05-19 1969-04-22 Bendix Corp Aircraft starter control
US3826985A (en) * 1971-06-04 1974-07-30 Motorola Inc Self-powered tachometer circuit
DE2135912A1 (en) * 1971-07-17 1973-03-22 Lestra Ag DEVICE FOR SCANNING SPEED VALUES IN MOTOR VEHICLES
US3845375A (en) * 1973-11-09 1974-10-29 Mclaughlin Ward & Co Electronic rotational sensor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2542468A1 (en) * 1983-03-10 1984-09-14 G G Electricite Amplifier for position sensor
WO2001060454A1 (en) * 2000-02-18 2001-08-23 Heartsine Technologies, Inc. A defibrillator
WO2004105244A2 (en) 2003-05-15 2004-12-02 Touchsensor Technologies, Llc Two wire touch sensor interface
EP1627469B1 (en) * 2003-05-15 2013-02-20 TouchSensor Technologies, L.L.C. Two wire touch sensor interface

Also Published As

Publication number Publication date
FR2405595B1 (en) 1984-02-03
CA1096474A (en) 1981-02-24
DE2843278A1 (en) 1979-04-05
GB2006999B (en) 1982-11-24
DE2843278C2 (en) 1983-01-13
FR2405595A1 (en) 1979-05-04

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)

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PCNP Patent ceased through non-payment of renewal fee