GB1123028A - Electrical control device - Google Patents

Electrical control device

Info

Publication number
GB1123028A
GB1123028A GB3818265A GB3818265A GB1123028A GB 1123028 A GB1123028 A GB 1123028A GB 3818265 A GB3818265 A GB 3818265A GB 3818265 A GB3818265 A GB 3818265A GB 1123028 A GB1123028 A GB 1123028A
Authority
GB
United Kingdom
Prior art keywords
arm
shaft
pivoted
spindle
control member
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
GB3818265A
Inventor
Eric Alfred Harvey
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.)
Ilford Imaging UK Ltd
Original Assignee
Ilford 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 Ilford Ltd filed Critical Ilford Ltd
Priority to GB3818265A priority Critical patent/GB1123028A/en
Publication of GB1123028A publication Critical patent/GB1123028A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/04—Adjustable resistors with specified mathematical relationship between movement of resistor actuating means and value of resistance, other than direct proportional relationship
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/30—Adjustable resistors the contact sliding along resistive element
    • H01C10/32—Adjustable resistors the contact sliding along resistive element the contact moving in an arcuate path

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Adjustable Resistors (AREA)

Abstract

1,123,028. Electrical control devices. ILFORD Ltd. 5 Oct., 1966 [7 Sept., 1965], No. 38182/65. Heading H3Q. [Also in Divisions F2 and H1] A control device 10 comprises two relatively rotatable members 11, 12 the relative angular position of which determines the value of an electrical parameter (e.g. resistance or voltage), and a rotatable control member (a knob attached to shaft 21) for effecting relative rotation of members 11, 12, whereby the relative angular displacement of members 11, 12 varies logarithmically with the amount of rotation of the control member. In the embodiments described, a linear variable potentiometer 10 having a casing 11 and a rotatable spindle 12 is employed, the spindle 12 being rigidly attached to an arm 20 which is rotated by the control member attached to shaft 21. An arm 26 is rigidly attached to casing 11 and pivoted at 29 to one end of a further arm 27, the other end of which is pivoted to a fixed point 28. The linkage 26, 27 is arranged such that the relative angular displacement of spindle 12 and casing 11 bears a logarithmic relation to the amount of rotation of the control member (shaft 21). For reasons of convenience of space shaft 21 and spindle 12 may be unitary (Figs. 8, 9, not shown) and also rotate, through a gear train (35, 36, 37), an arm (33) in the same direction as shaft 21. The arm (33) has pivoted at its extremity one end of link 27, the other end of which is pivoted to the extremity of arm 26.
GB3818265A 1965-09-07 1965-09-07 Electrical control device Expired GB1123028A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3818265A GB1123028A (en) 1965-09-07 1965-09-07 Electrical control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3818265A GB1123028A (en) 1965-09-07 1965-09-07 Electrical control device

Publications (1)

Publication Number Publication Date
GB1123028A true GB1123028A (en) 1968-08-07

Family

ID=10401779

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3818265A Expired GB1123028A (en) 1965-09-07 1965-09-07 Electrical control device

Country Status (1)

Country Link
GB (1) GB1123028A (en)

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