GB985827A - Apparatus utilising electro-viscous liquid - Google Patents

Apparatus utilising electro-viscous liquid

Info

Publication number
GB985827A
GB985827A GB117362A GB117362A GB985827A GB 985827 A GB985827 A GB 985827A GB 117362 A GB117362 A GB 117362A GB 117362 A GB117362 A GB 117362A GB 985827 A GB985827 A GB 985827A
Authority
GB
United Kingdom
Prior art keywords
liquid
discs
electrodes
subjected
potential difference
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
GB117362A
Inventor
Sigifredo Emilio Nuber
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.)
Dana Inc
Original Assignee
Warner Electric Brake and Clutch Co
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 Warner Electric Brake and Clutch Co filed Critical Warner Electric Brake and Clutch Co
Priority to GB117362A priority Critical patent/GB985827A/en
Publication of GB985827A publication Critical patent/GB985827A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D37/00—Clutches in which the drive is transmitted through a medium consisting of small particles, e.g. centrifugally speed-responsive
    • F16D37/008—Clutches in which the drive is transmitted through a medium consisting of small particles, e.g. centrifugally speed-responsive the particles being carried by a fluid, to vary viscosity when subjected to electric change, i.e. electro-rheological or smart fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/15—Devices for holding work using magnetic or electric force acting directly on the work
    • B23Q3/154—Stationary devices

Abstract

985,827. Hydraulic clutches; fluid-friction brakes. WARNER ELECTRIC BRAKE & CLUTCH CO. Jan. 12, 1962, No. 1173/62. Headings F2C and F2E. [Also in Divisions G3 and H1] In apparatus employing the property of certain liquids of increasing in viscosity when subjected to an electric field (e.g. to act as a clutch or a brake), and in which means are provided for selectively applying an alternating potential difference between pairs of electrodes so positioned that a thin film of such " electroviscous " liquid is subjected to a large electric field when the alternating potential difference is applied, the electrodes are separated from the liquid by an insulating material of high dielectric constant to reduce the likelihood of electrical breakdown in the liquid. In the embodiment of Fig. 6, a brake comprises a plurality of discs 44, 45, 46 each composed of a central metal-disc electrode enclosed within high dielectric-constant material coaxially secured in fixed positions within a cylindrical shell, leads from the electrodes being brought out to respective ones of three-phase power supply lines 21, 22, 23. A rotatable shaft 58 passing coaxially through the discs 44, 45, 46 carries metal discs 60, 61, 62 rotating therewith and fitting between the discs 44, 45, 46 to define narrow spaces which are filled with an " electroviscous " liquid, examples of which are described in U.S.A. Specifications 2,661,825 and 3,047,507 and in the present Specification. The application of an alternating potential difference between adjacent electrodes causes lines of force to pass from one electrode to the other through the intermediary of the dielectric material and metal discs 60, 61, 62; by the use of a three-phase supply it can be ensured that part of the liquid is subjected to an electric stress at all times, hence causing the liquid to become viscous and hold the discs 60, 61, 62 against rotation.
GB117362A 1962-01-12 1962-01-12 Apparatus utilising electro-viscous liquid Expired GB985827A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB117362A GB985827A (en) 1962-01-12 1962-01-12 Apparatus utilising electro-viscous liquid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB117362A GB985827A (en) 1962-01-12 1962-01-12 Apparatus utilising electro-viscous liquid

Publications (1)

Publication Number Publication Date
GB985827A true GB985827A (en) 1965-03-10

Family

ID=9717431

Family Applications (1)

Application Number Title Priority Date Filing Date
GB117362A Expired GB985827A (en) 1962-01-12 1962-01-12 Apparatus utilising electro-viscous liquid

Country Status (1)

Country Link
GB (1) GB985827A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120806A (en) * 1977-12-15 1983-12-07 Secr Defence Electroviscous fluid actuators
GB2125230A (en) * 1982-07-22 1984-02-29 Nat Res Dev Improvements relating to electroviscous fluid-actuated devices
US4444298A (en) * 1981-07-10 1984-04-24 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Viscous shear clutch
US4920929A (en) * 1987-11-18 1990-05-01 Jaguar Cars Limited Variable speed coupling system for cooling an engine
GB2238368A (en) * 1989-09-26 1991-05-29 Ashe Controls Limited Variable torque clutch control
GB2252148A (en) * 1991-01-24 1992-07-29 British Tech Group Selectively-operable hydraulic drive or braking device
US5524743A (en) * 1991-01-24 1996-06-11 British Technology Group Ltd. Quick-acting drive devices
US20190107157A1 (en) * 2017-10-09 2019-04-11 Microsoft Technology Licensing, Llc Electrostatic rotary clutch

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120806A (en) * 1977-12-15 1983-12-07 Secr Defence Electroviscous fluid actuators
US4444298A (en) * 1981-07-10 1984-04-24 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Viscous shear clutch
GB2125230A (en) * 1982-07-22 1984-02-29 Nat Res Dev Improvements relating to electroviscous fluid-actuated devices
US4920929A (en) * 1987-11-18 1990-05-01 Jaguar Cars Limited Variable speed coupling system for cooling an engine
GB2238368A (en) * 1989-09-26 1991-05-29 Ashe Controls Limited Variable torque clutch control
GB2238368B (en) * 1989-09-26 1993-03-31 Ashe Controls Limited Variable torque clutch
GB2252148A (en) * 1991-01-24 1992-07-29 British Tech Group Selectively-operable hydraulic drive or braking device
WO1992013209A1 (en) * 1991-01-24 1992-08-06 British Technology Group Ltd Quick-acting drive devices
GB2252148B (en) * 1991-01-24 1995-06-14 British Tech Group Electrorheological drive or braking devices
US5524743A (en) * 1991-01-24 1996-06-11 British Technology Group Ltd. Quick-acting drive devices
US20190107157A1 (en) * 2017-10-09 2019-04-11 Microsoft Technology Licensing, Llc Electrostatic rotary clutch
US10663016B2 (en) * 2017-10-09 2020-05-26 Microsoft Technology Licensing, Llc Electrostatic rotary clutch

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