GB2021286A - Ration preserving control system - Google Patents

Ration preserving control system

Info

Publication number
GB2021286A
GB2021286A GB7909366A GB7909366A GB2021286A GB 2021286 A GB2021286 A GB 2021286A GB 7909366 A GB7909366 A GB 7909366A GB 7909366 A GB7909366 A GB 7909366A GB 2021286 A GB2021286 A GB 2021286A
Authority
GB
United Kingdom
Prior art keywords
actual value
operating parameters
outputs
operating
ration
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.)
Granted
Application number
GB7909366A
Other versions
GB2021286B (en
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.)
Individual
Original Assignee
Individual
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 US05/820,005 external-priority patent/US4156933A/en
Application filed by Individual filed Critical Individual
Publication of GB2021286A publication Critical patent/GB2021286A/en
Application granted granted Critical
Publication of GB2021286B publication Critical patent/GB2021286B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/48—Analogue computers for specific processes, systems or devices, e.g. simulators
    • G06G7/66—Analogue computers for specific processes, systems or devices, e.g. simulators for control systems

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Automation & Control Theory (AREA)
  • Mathematical Physics (AREA)
  • Lens Barrels (AREA)
  • Feedback Control In General (AREA)

Abstract

An interlock mechanism for an operating system such as a zoom lens with at least first and second independently controllable operating parameters comprising sending means (11, 12) for generating control outputs which are the logarithmic value to a common base of the actual value of the operating parameter with which each control output is associated and control means (14) responsive to the difference between values of the outputs to change the actual value of one of the operating parameters as the actual value of the other operating parameter is changed to maintain a selected difference between the control outputs so that a selected prescribed ratio is maintained between the actual values of the operating parameters. The disclosure contemplates electromechanical, mechanical and electrical versions of the interlock mechanism.
GB7909366A 1977-07-28 1978-07-25 Ration preserving control system Expired GB2021286B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/820,005 US4156933A (en) 1977-07-28 1977-07-28 Ratio preserving control system
US05/895,139 US4145732A (en) 1977-07-28 1978-04-10 Ratio preserving control system for a lens

Publications (2)

Publication Number Publication Date
GB2021286A true GB2021286A (en) 1979-02-22
GB2021286B GB2021286B (en) 1982-05-12

Family

ID=27124413

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7909366A Expired GB2021286B (en) 1977-07-28 1978-07-25 Ration preserving control system

Country Status (4)

Country Link
EP (1) EP0006879A1 (en)
JP (1) JPS601602B2 (en)
GB (1) GB2021286B (en)
WO (1) WO1979000072A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3745055C2 (en) * 1986-03-03 1998-02-26 Canon Kk Optics setter for camera
JP2753495B2 (en) * 1988-03-14 1998-05-20 チノン株式会社 Camera zoom lens automatic zooming device
US5157434A (en) * 1988-09-14 1992-10-20 Asahi Kogaku Kogyo Kabushiki Kaisha Autofocusing system for camera
DE68929406T2 (en) * 1988-09-22 2003-02-13 Asahi Optical Co Ltd Control device for image enlargement of a camera
US5305044A (en) * 1988-09-29 1994-04-19 Asahi Kogaku Kogyo Kabushiki Kaisha Autofocusing system for a camera
JPH0734405Y2 (en) * 1988-09-29 1995-08-02 旭光学工業株式会社 Camera lens storage device
US20030051594A1 (en) 2001-09-19 2003-03-20 Yamaha Corporation Electronic keyboard musical instrument
JP4804398B2 (en) 2007-03-30 2011-11-02 三洋電機株式会社 Imaging apparatus and imaging method
JP2011142646A (en) * 2011-02-04 2011-07-21 Sanyo Electric Co Ltd Imaging apparatus
JP2011142645A (en) * 2011-02-04 2011-07-21 Sanyo Electric Co Ltd Imaging apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1950166A (en) * 1931-09-14 1934-03-06 Otto B Durholz Variable focus lens unit
NL90813C (en) * 1950-07-18
NL232999A (en) * 1958-06-06
DE1183354B (en) * 1960-04-01 1964-12-10 Vockenhuber Karl Camera, especially cine film camera
CH481389A (en) * 1968-09-26 1969-11-15 Paillard Sa Cinematographic camera
US3765748A (en) * 1972-09-01 1973-10-16 H Mito Mechanism for relative adjustment of axially spaced lens components
JPS5127577B2 (en) * 1972-12-08 1976-08-13

Also Published As

Publication number Publication date
WO1979000072A1 (en) 1979-02-22
EP0006879A1 (en) 1980-01-23
GB2021286B (en) 1982-05-12
JPS601602B2 (en) 1985-01-16
JPS5425819A (en) 1979-02-27

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee