GB932158A - Improvements in or relating to time delay devices - Google Patents

Improvements in or relating to time delay devices

Info

Publication number
GB932158A
GB932158A GB26145/61A GB2614561A GB932158A GB 932158 A GB932158 A GB 932158A GB 26145/61 A GB26145/61 A GB 26145/61A GB 2614561 A GB2614561 A GB 2614561A GB 932158 A GB932158 A GB 932158A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
passage
cover plate
lower chamber
cavity
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
GB26145/61A
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.)
Cutler Hammer Europe Ltd
Original Assignee
Brockhurst Igranic 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 Brockhurst Igranic Ltd filed Critical Brockhurst Igranic Ltd
Publication of GB932158A publication Critical patent/GB932158A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G7/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof
    • G05G7/14—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof characterised by means for delaying initiation of, or making more gradual throughout, the movement of the controlled member in response to a given input from the controlling member, e.g. by providing lost motion in the command train
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/10—Delay devices or arrangements
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F1/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Fluid-Damping Devices (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

932,158. Dashpots. BROOKHIRST IGRANIC Ltd. July 19, 1961 [Aug. 30, 1960], No. 26145/61. Class 108(3). In a pneumatic time delay device in which a flexible diaphragm 14 divides a cavity in a body 10 with a cover plate 12 into upper and lower chambers the diaphragm is arranged to seal and open respectively a part annular exhaust passage 44 leading from the lower chamber to atmosphere when the pressure developed in the lower chamber is correspondingly below and above the exhaust pressure. The annular passage 44, which is formed concentrically about a part-spherical cavity 38 in the body 10, communicates through short passages 46 with a passage 48 which extends across the body 10 and has filters 50 in its outlet openings. The diaphragm 14, has a bead 14a which seats in an annular recess 52 in the body 10 and is clamped between the latter and a flange 12a of the cover plate 12 which is secured to the body 10 by screws 56 and has a ring of apertures 60 open to the atmosphere, the lower chamber, formed by the cavity 38, communicates through a small passage 40 with the tapered inner end portion 42a of a passage 42 which leads to the transverse passage 48 and is internally threaded to receive the threaded portion of a metering pin 64 having a tapered portion 64a which co-operates with the taper 42a. The centre portion 14d of the diaphragm 14 is moulded to the head 16a of a pin 16 which extends through a nylon bearing 62 in a centre boss 12c on the cover plate 12 and has a stop 18 connected to its outer end a compression spring 22 being constrained between the cover plate 12 and a cup member 20 which co-operates with the stop 18 and the arms 26a of a toggle switch lever 26. Upward movement of the rod 16 from the position shown in Fig. 2 is retarded air only entering the lower chamber at a restricted rate through the opening 40 the exhaust passage 44 being closed by the peripheral portion 14b of the diaphragm 14. The build up of pressure in the lower diaphragm chamber as the rod 16 descends causes the edge portion 14b of the diaphragm 14 to be lifted off the passage 44 and provide rapid exhaustion of air from the lower chamber. A small space X between the diaphragm edge portion 14b and the adjacent portion 12a of the cover plate 12 is provided to accommodate the raising of the diaphragm portion 14b.
GB26145/61A 1960-08-30 1961-07-19 Improvements in or relating to time delay devices Expired GB932158A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US52879A US3040842A (en) 1960-08-30 1960-08-30 Pneumatic time delay device

Publications (1)

Publication Number Publication Date
GB932158A true GB932158A (en) 1963-07-24

Family

ID=21980505

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26145/61A Expired GB932158A (en) 1960-08-30 1961-07-19 Improvements in or relating to time delay devices

Country Status (2)

Country Link
US (1) US3040842A (en)
GB (1) GB932158A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3132221A (en) * 1961-12-15 1964-05-05 Robertshaw Controls Co Vibration switch
US3178524A (en) * 1962-04-20 1965-04-13 Bliss E W Co Pneumatically timed electric switch arrangement
GB1090180A (en) * 1966-03-18 1967-11-08 Telemeccanica Elettrica Ing Am Improvements in or relating to pneumatic time delay devices
US3466410A (en) * 1968-01-19 1969-09-09 Leslie H Jordan Vacuum operated timer switch
JPS5418747B2 (en) * 1973-07-11 1979-07-10
SE408945B (en) * 1977-12-06 1979-07-16 Alfa Laval Ab PNEUMATIC DELAYER
US4655313A (en) * 1985-08-26 1987-04-07 Outboard Marine Corporation Vehicle seat switch

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2103378A (en) * 1933-08-24 1937-12-28 American Gasaccumulator Co Time delay apparatus
US2630886A (en) * 1947-12-11 1953-03-10 Elastic Stop Nut Corp Pneumatic time delay device
US2712440A (en) * 1949-09-29 1955-07-05 Crabtree & Co Ltd J A Time delay devices
US2785347A (en) * 1953-07-03 1957-03-12 Westinghouse Electric Corp Time delay trip circuit breaker
US2866862A (en) * 1955-10-14 1958-12-30 Controls Co Of America Time delay switch
US2929898A (en) * 1957-05-06 1960-03-22 Square D Co Pneumatic timing device
US2969973A (en) * 1959-09-21 1961-01-31 Paragon Products Corp Dash-pot

Also Published As

Publication number Publication date
US3040842A (en) 1962-06-26

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