GB1355134A - Pneumatic control circuits - Google Patents

Pneumatic control circuits

Info

Publication number
GB1355134A
GB1355134A GB3772871A GB3772871A GB1355134A GB 1355134 A GB1355134 A GB 1355134A GB 3772871 A GB3772871 A GB 3772871A GB 3772871 A GB3772871 A GB 3772871A GB 1355134 A GB1355134 A GB 1355134A
Authority
GB
United Kingdom
Prior art keywords
restrictor
pressure
amplifier
delay unit
time delay
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
GB3772871A
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.)
JC Eckardt AG
Original Assignee
JC Eckardt AG
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 DE19702040169 external-priority patent/DE2040169C3/en
Application filed by JC Eckardt AG filed Critical JC Eckardt AG
Publication of GB1355134A publication Critical patent/GB1355134A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES
    • F15C4/00—Circuit elements characterised by their special functions
    • 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
    • Y10T137/2278—Pressure modulating relays or followers
    • Y10T137/2365—Plural series units
    • 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
    • Y10T137/2278—Pressure modulating relays or followers
    • Y10T137/2409—With counter-balancing pressure feedback to the modulating device
    • Y10T137/2452—With counter-counter balancing pressure feedback

Abstract

1355134 Fluid-pressure servosystems J C ECKARDT AG 11 Aug 1971 [13 Aug 1970] 37728/71 Addition to 1286123 Heading G3P A pneumatic controller has a differential pressure amplifier 1 providing an output y in line 10a in response to pressures established by a pair of pressure dividers constituted respectively by restrictors 2, 3 and 4, 5. A desired value w is applied at restrictor 4, and a negative feedback pressure derived from time delay unit T V and buffer amplifier 7 is applied at restrictor 5. An actual value x is applied at restrictor 2, and a positive feedback pressure derived from line 15 by time delay unit T N and buffer amplifier 6 is applied at restrictor 3. The amplifiers 6, 7 have internal feedback applied via respective pressure dividers 13, 14 and 18, 17. Each of the amplifiers has balls 23 controlling flow to and from the respective output passage. In a modified controller, buffer amplifier 7 and time delay unit T V are omitted and the time derivative of the actual value x is applied at restrictor 2. A twostage amplifier 1 is used in this case.
GB3772871A 1970-08-13 1971-08-11 Pneumatic control circuits Expired GB1355134A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702040169 DE2040169C3 (en) 1970-08-13 Shading for pneumatic regulators

Publications (1)

Publication Number Publication Date
GB1355134A true GB1355134A (en) 1974-06-05

Family

ID=5779581

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3772871A Expired GB1355134A (en) 1970-08-13 1971-08-11 Pneumatic control circuits

Country Status (4)

Country Link
US (1) US3782403A (en)
CH (1) CH537045A (en)
FR (1) FR2102235B1 (en)
GB (1) GB1355134A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120814A (en) * 1982-05-14 1983-12-07 Honeywell Gmbh Pneumatic controller

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602005019367D1 (en) * 2004-12-15 2010-04-01 Dornier Medtech Systems Gmbh Enhanced cell therapy and tissue regeneration via shock waves in patients with cardiovascular and neurological diseases
US7654259B1 (en) * 2007-08-07 2010-02-02 Lawrence Royce Allen Keystone-shaped fireplace door apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1376489A (en) * 1963-01-22 1964-10-31 Snecma pneumatic or hydraulic circuit element simultaneously performing the logical intersection and dilemma operations
US3339571A (en) * 1964-06-24 1967-09-05 Foxboro Co Fluid amplifier analog controller
US3395719A (en) * 1964-09-23 1968-08-06 Gen Electric Fluid-operated control system
US3417769A (en) * 1964-11-30 1968-12-24 Johnson Service Co Pure fluid operational amplifier
US3388713A (en) * 1965-01-25 1968-06-18 Johnson Service Co Pure fluid summing impact modulator and universal amplifiers constructed therewith
GB1085925A (en) * 1965-09-22 1967-10-04 Westland Aircraft Ltd Improvements in or relating to pressure control systems
US3495774A (en) * 1968-01-19 1970-02-17 Us Army Flueric squaring circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120814A (en) * 1982-05-14 1983-12-07 Honeywell Gmbh Pneumatic controller

Also Published As

Publication number Publication date
CH537045A (en) 1973-05-15
FR2102235B1 (en) 1975-07-11
DE2040169B2 (en) 1973-05-24
US3782403A (en) 1974-01-01
FR2102235A1 (en) 1972-04-07
DE2040169A1 (en) 1972-02-17

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee