GB474870A - Pneumatic control apparatus - Google Patents

Pneumatic control apparatus

Info

Publication number
GB474870A
GB474870A GB2266/37A GB226637A GB474870A GB 474870 A GB474870 A GB 474870A GB 2266/37 A GB2266/37 A GB 2266/37A GB 226637 A GB226637 A GB 226637A GB 474870 A GB474870 A GB 474870A
Authority
GB
United Kingdom
Prior art keywords
spring
action
driving
conduit
valve
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
GB2266/37A
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.)
Servo Frein Dewandre SA
Original Assignee
Servo Frein Dewandre SA
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 Servo Frein Dewandre SA filed Critical Servo Frein Dewandre SA
Publication of GB474870A publication Critical patent/GB474870A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/08—Surface hardening with flames

Abstract

474,870. Pneumatic apparatus. SERVO-FREIN DEWANDRE SOC. ANON. Jan. 26, 1937, No. 2266. Convention date, Feb. 7, 1936. [Class 8 (ii)] In apparatus for the remote control of the displacement of a mechanical member by means of a pneumatic driving member mechanism is provided which secures the full stroke of the member independently of the duration of the action of the operator on the control means, the operator opening the conduit 21 to open to pressure causes the pilot valve 21 to shoot back and it is locked in this position by the nose of the spring-loaded piston 27 which engages behind a recess on the valve stem and the follower valve 11 is simultaneously pressed back and opens up the conduit 12 to pressure which is conveyed through the pipe 34 to the cylinder 55 thus causing the driving-member 37 to advance against the action of a spring 29. At the end of its stroke the bevelled end of the driving-member presses back a cam 28 which is integral with the piston 27 and allows the pilot valve 21 to return to its initial position under the action of the spring 15. In a modification, the unlocking of the distributer is effected pneumatically.
GB2266/37A 1936-02-07 1937-01-26 Pneumatic control apparatus Expired GB474870A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR474870X 1936-02-07

Publications (1)

Publication Number Publication Date
GB474870A true GB474870A (en) 1937-11-09

Family

ID=8902889

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2266/37A Expired GB474870A (en) 1936-02-07 1937-01-26 Pneumatic control apparatus

Country Status (1)

Country Link
GB (1) GB474870A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117055A (en) * 1982-03-19 1983-10-05 Legris Compressed fluid saving device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117055A (en) * 1982-03-19 1983-10-05 Legris Compressed fluid saving device

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