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GB1134342A - Vacuum control particularly for a tape loop box - Google Patents

Vacuum control particularly for a tape loop box

Info

Publication number
GB1134342A
GB1134342A GB15634/66A GB1563466A GB1134342A GB 1134342 A GB1134342 A GB 1134342A GB 15634/66 A GB15634/66 A GB 15634/66A GB 1563466 A GB1563466 A GB 1563466A GB 1134342 A GB1134342 A GB 1134342A
Authority
GB
United Kingdom
Prior art keywords
pressure
area
tape
box
vacuum
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
GB15634/66A
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.)
Unisys Corp
Original Assignee
Sperry Rand Corp
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 Sperry Rand Corp filed Critical Sperry Rand Corp
Publication of GB1134342A publication Critical patent/GB1134342A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/56—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function the record carrier having reserve loop, e.g. to minimise inertia during acceleration measuring or control in connection therewith
    • G11B15/58—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function the record carrier having reserve loop, e.g. to minimise inertia during acceleration measuring or control in connection therewith with vacuum column
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2066—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using controlling means acting on the pressure source

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Advancing Webs (AREA)

Abstract

1,134,342. Automatic pressure control. SPERRY RAND CORP. April 7, 1966 [April 23, 1965], No.15634/66. Heading G3R. When the pressure in a low-pressure area 14 between the bottom surface of magnetic tape 12 and loop-box 10 drops below a predetermined value, vacuum switch 48 is held open to interrupt the gating circuit of silicon controlled rectifier 22. Series motor 18 is de-energized so that vacuum pump 16 decelerates to permit the pressure in the area 14 to increase. The vacuum switch 48 remains closed to render the rectifier 22 conductive when the pressure in the area 14 rises. The speed of the vacuum pump is thus increased to reduce the pressure below the tape the upper side of which is subjected to atmospheric pressure. The vacuum switch unit comprises a flexible diaphragm separating two chambers one of which is exposed to atmosphere and the other is connected to the area 14 of the tape loop-box. The pressure at which the switch 48 is actuated is set by the position of an adjustable leakage valve 46.
GB15634/66A 1965-04-23 1966-04-07 Vacuum control particularly for a tape loop box Expired GB1134342A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US450434A US3360185A (en) 1965-04-23 1965-04-23 Vacuum pump control

Publications (1)

Publication Number Publication Date
GB1134342A true GB1134342A (en) 1968-11-20

Family

ID=23788079

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15634/66A Expired GB1134342A (en) 1965-04-23 1966-04-07 Vacuum control particularly for a tape loop box

Country Status (3)

Country Link
US (1) US3360185A (en)
BE (1) BE679900A (en)
GB (1) GB1134342A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2501303A1 (en) * 1981-03-09 1982-09-10 Graco Inc ALTERNATING MOTION PUMPING UNIT WITH VARIABLE SPEED AND SPEED CONTROL CIRCUIT FOR A DC MOTOR FOR THIS GROUP

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5008051A (en) * 1989-03-01 1991-04-16 Decoursey Robert T Vacuum sizing tank with electronically controlled vacuum pressure
US5417246A (en) * 1989-10-27 1995-05-23 American Cyanamid Company Pneumatic controls for ophthalmic surgical system
US5242404A (en) * 1992-02-12 1993-09-07 American Cyanamid Company Aspiration control system
US5624394A (en) * 1994-10-28 1997-04-29 Iolab Corporation Vacuum system and a method of operating a vacuum system
US5810766A (en) * 1995-02-28 1998-09-22 Chiron Vision Corporation Infusion/aspiration apparatus with removable cassette
ES2209567B1 (en) * 2001-02-28 2005-09-16 Guillermo Aguirre AUTOMATIC DEVICE FOR REGULATING THE VACUUM PRESSURE VARYING THE ROTATION SPEED OF THE VACUUM PUMPS BY VARIATION OF THE ELECTRICAL FREQUENCY.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1132777A (en) * 1915-03-23 Lamson Co Automatic pressure-controller.
US440375A (en) * 1890-11-11 Fred s
US862696A (en) * 1905-03-21 1907-08-06 Pearsall Pneumatic Tube And Power Company Governing mechanism for pneumatic-tube systems.
US1073276A (en) * 1911-12-05 1913-09-16 Otto H Mohr Preserving apparatus.
US1347194A (en) * 1919-04-29 1920-07-20 Washington Elwood Vacuum-cabinet
NL279740A (en) * 1961-06-29
DE1252741B (en) * 1962-05-18 1967-10-26 Potter Instrument Company Ine Plamview NY (V St A) Control arrangement for the loop size of a tape-shaped recording medium
US3258183A (en) * 1964-02-26 1966-06-28 Potter Instrument Co Inc Tunable tape velocity-fluctuation damper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2501303A1 (en) * 1981-03-09 1982-09-10 Graco Inc ALTERNATING MOTION PUMPING UNIT WITH VARIABLE SPEED AND SPEED CONTROL CIRCUIT FOR A DC MOTOR FOR THIS GROUP

Also Published As

Publication number Publication date
BE679900A (en) 1966-10-03
US3360185A (en) 1967-12-26

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