GB2200000B - Valve actuators - Google Patents

Valve actuators

Info

Publication number
GB2200000B
GB2200000B GB8700903A GB8700903A GB2200000B GB 2200000 B GB2200000 B GB 2200000B GB 8700903 A GB8700903 A GB 8700903A GB 8700903 A GB8700903 A GB 8700903A GB 2200000 B GB2200000 B GB 2200000B
Authority
GB
United Kingdom
Prior art keywords
valve actuators
actuators
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 - Fee Related
Application number
GB8700903A
Other versions
GB8700903D0 (en
GB2200000A (en
Inventor
John W De Fries
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.)
Cambridge Instruments Ltd
Original Assignee
Cambridge Instruments 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 Cambridge Instruments Ltd filed Critical Cambridge Instruments Ltd
Priority to GB8700903A priority Critical patent/GB2200000B/en
Publication of GB8700903D0 publication Critical patent/GB8700903D0/en
Publication of GB2200000A publication Critical patent/GB2200000A/en
Application granted granted Critical
Publication of GB2200000B publication Critical patent/GB2200000B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/022—Synchronous motors
    • H02P25/024—Synchronous motors controlled by supply frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
GB8700903A 1987-01-16 1987-01-16 Valve actuators Expired - Fee Related GB2200000B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8700903A GB2200000B (en) 1987-01-16 1987-01-16 Valve actuators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8700903A GB2200000B (en) 1987-01-16 1987-01-16 Valve actuators

Publications (3)

Publication Number Publication Date
GB8700903D0 GB8700903D0 (en) 1987-02-18
GB2200000A GB2200000A (en) 1988-07-20
GB2200000B true GB2200000B (en) 1991-01-23

Family

ID=10610742

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8700903A Expired - Fee Related GB2200000B (en) 1987-01-16 1987-01-16 Valve actuators

Country Status (1)

Country Link
GB (1) GB2200000B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4410844A (en) * 1982-05-26 1983-10-18 Allied Corporation Sliding door actuating mechanism

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4410844A (en) * 1982-05-26 1983-10-18 Allied Corporation Sliding door actuating mechanism

Also Published As

Publication number Publication date
GB8700903D0 (en) 1987-02-18
GB2200000A (en) 1988-07-20

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930116