JPS57211611A - Speed governor - Google Patents

Speed governor

Info

Publication number
JPS57211611A
JPS57211611A JP9654681A JP9654681A JPS57211611A JP S57211611 A JPS57211611 A JP S57211611A JP 9654681 A JP9654681 A JP 9654681A JP 9654681 A JP9654681 A JP 9654681A JP S57211611 A JPS57211611 A JP S57211611A
Authority
JP
Japan
Prior art keywords
flat spring
coupling
switch
motor
disc
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.)
Pending
Application number
JP9654681A
Other languages
Japanese (ja)
Inventor
Shoichi Nakao
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9654681A priority Critical patent/JPS57211611A/en
Publication of JPS57211611A publication Critical patent/JPS57211611A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D13/00—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover
    • G05D13/02—Details
    • G05D13/04—Details providing for emergency tripping of an engine in case of exceeding maximum speed

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

PURPOSE:To detect an abnormal speed of a rotating material with a simple part structure, by utilizing the centrifugal force of a weight to displace a flat spring and detecting the rotation number by the quantity of this displacement. CONSTITUTION:A flat spring 9 bent a little is attached to a coupling 8 of a motor so that a space is interposed between the upper end of the flat spring 9 and the coupling and the lower end is fixed to press plate 10 by a bolt 11, and a weight 12 is fixed to the upper end of the flat spring, and plural flat springs and weights constituted in this manner are arranged so as to keep their balance. A disc 14 is connected to the weight 12 through a pin 13, and a switch 15 is brought into contact with the side face of the disc 14. When the coupling 8 is rotated, the flat spring 9 is bent to be brought into contact with the side face of the coupling, and the disc 14 is moved and is separated from the switch 15. The elasticity of springs and weights are selected properly to depress the switch for a certain rotation number or less, and the circuit is so constituted that the power source of a motor is turned off when the switch 15 is depressed, and thus, the motor is stopped when the rotation number of the motor is reduced abnormally.
JP9654681A 1981-06-24 1981-06-24 Speed governor Pending JPS57211611A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9654681A JPS57211611A (en) 1981-06-24 1981-06-24 Speed governor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9654681A JPS57211611A (en) 1981-06-24 1981-06-24 Speed governor

Publications (1)

Publication Number Publication Date
JPS57211611A true JPS57211611A (en) 1982-12-25

Family

ID=14168090

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9654681A Pending JPS57211611A (en) 1981-06-24 1981-06-24 Speed governor

Country Status (1)

Country Link
JP (1) JPS57211611A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS639612U (en) * 1986-07-04 1988-01-22

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS639612U (en) * 1986-07-04 1988-01-22

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