GB902662A - Pneumatic motor governor - Google Patents

Pneumatic motor governor

Info

Publication number
GB902662A
GB902662A GB1349661A GB1349661A GB902662A GB 902662 A GB902662 A GB 902662A GB 1349661 A GB1349661 A GB 1349661A GB 1349661 A GB1349661 A GB 1349661A GB 902662 A GB902662 A GB 902662A
Authority
GB
United Kingdom
Prior art keywords
passage
motor
detent
move
support
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
Application number
GB1349661A
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.)
Thor Power Tool Co
Original Assignee
Thor Power Tool 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 Thor Power Tool Co filed Critical Thor Power Tool Co
Publication of GB902662A publication Critical patent/GB902662A/en
Expired 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
    • G05D13/08—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover without auxiliary power
    • G05D13/10—Centrifugal governors with fly-weights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/06—Adaptations for driving, or combinations with, hand-held tools or the like control thereof
    • 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
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/0971—Speed responsive valve control
    • Y10T137/1026—Speed change and excess speed valve control

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

902,662. Centrifugal governors. THOR POWER TOOL CO. April 14, 1961 [May 19, 1960], No. 13496/61. Classes 57 and 122 (4). A pneumatic motor governor 31, Fig. 2, comprises a support 51 having an air passage 52, a speedresponsive mechanism 66, connected to a closure element 58 so as to move it towards and away from a position closing the passage; a detent 79 for holding another closure element 69 in a retracted position until the motor reaches a predetermined maximum speed when it is released to be urged by a spring 73 into a passage closing position. Compressed air is admitted through a passage 22, in a handgrinder handle 13, via chamber 27, passage 52, chamber 29 to the inlet duct 47 of a vane-type pneumatic motor. The support 51, rotates with the motor and in normal operation the weights 66, pivoted at 67, are moved outwardly with increase of speed to move the element 58 through cam surfaces 70 so as to close-off the passage port 54 and thus reduce the air flow. With increase in motor speed beyond a predetermined maximum, consequently upon the failure of the governor 31, detent 79 is moved outwardly by centrifugal force against a spring 81, which is retained by a circular clip 83, so as to release the detent from a depression 78 in the support 51. This permits spring 73 to move the closure element 69 axially until the radial faces 71, 72 abut to seal the passage 54, cutting-off the air supply to the motor.
GB1349661A 1960-05-19 1961-04-14 Pneumatic motor governor Expired GB902662A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3035360 US3020920A (en) 1960-05-19 1960-05-19 Pneumatic motor governor

Publications (1)

Publication Number Publication Date
GB902662A true GB902662A (en) 1962-08-09

Family

ID=21853828

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1349661A Expired GB902662A (en) 1960-05-19 1961-04-14 Pneumatic motor governor

Country Status (2)

Country Link
US (1) US3020920A (en)
GB (1) GB902662A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3279485A (en) * 1963-04-22 1966-10-18 Rockwell Mfg Co Safety governor for pneumatic tool
SE428229B (en) * 1978-10-11 1983-06-13 Atlas Copco Ab OVERVIEW PROTECTION FOR A PRESSURE AIR ENGINE
US4278103A (en) * 1980-01-07 1981-07-14 Chicago Pneumatic Tool Company Overspeed control means for pneumatic tools

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US794857A (en) * 1903-12-31 1905-07-18 Gen Electric Emergency-governor for elastic-fluid turbines.
US1274643A (en) * 1916-09-05 1918-08-06 Henry H Wait Steam-turbine.
US2114813A (en) * 1937-05-18 1938-04-19 Ingersoll Rand Co Governor

Also Published As

Publication number Publication date
US3020920A (en) 1962-02-13

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