GB994676A - Improvements in or relating to electrostatic clutches - Google Patents

Improvements in or relating to electrostatic clutches

Info

Publication number
GB994676A
GB994676A GB4518262A GB4518262A GB994676A GB 994676 A GB994676 A GB 994676A GB 4518262 A GB4518262 A GB 4518262A GB 4518262 A GB4518262 A GB 4518262A GB 994676 A GB994676 A GB 994676A
Authority
GB
United Kingdom
Prior art keywords
atmospheres
heating
water
drying
relating
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
GB4518262A
Inventor
Hugh Wilson Davidson
Howard Harold Walter Losty
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB4518262A priority Critical patent/GB994676A/en
Publication of GB994676A publication Critical patent/GB994676A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N13/00—Clutches or holding devices using electrostatic attraction, e.g. using Johnson-Rahbek effect
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H59/00—Electrostatic relays; Electro-adhesion relays

Abstract

A shaped semi-conductive pulley or bandliner for an electrostatic clutch of the Johnsen-Rahbek type (see Division Hl), is composed of partially carbonized polymeric organic material, e.g. furfuryl alcohol, but preferably consisting of regenerated cellulosic or hemicellulosic material. An electrical resistivity of 105-108 ohm cm. with a carbon content of more than 80% by weight is preferred. This material is formed by pulping wheat staw in water, removing part of the water by centrifuging, forming into the desired shape by moulding, drying by vacuum and heating, and then heating in one or more stages in nitrogen at 100 atmospheres slowly to 400-600 DEG C. while the pressure is raised to 360 atmospheres and maintained for 8 hours. A lubricant such as talc, molybdenum disulphide, P.T.F.E. or polyethylene may be incorporated in the cellulosic pulp before drying.
GB4518262A 1962-11-29 1962-11-29 Improvements in or relating to electrostatic clutches Expired GB994676A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4518262A GB994676A (en) 1962-11-29 1962-11-29 Improvements in or relating to electrostatic clutches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4518262A GB994676A (en) 1962-11-29 1962-11-29 Improvements in or relating to electrostatic clutches

Publications (1)

Publication Number Publication Date
GB994676A true GB994676A (en) 1965-06-10

Family

ID=10436211

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4518262A Expired GB994676A (en) 1962-11-29 1962-11-29 Improvements in or relating to electrostatic clutches

Country Status (1)

Country Link
GB (1) GB994676A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3343635A (en) * 1965-03-12 1967-09-26 Gen Electric Co Ltd Electrostatic clutches
US4393967A (en) * 1979-11-05 1983-07-19 International Business Machines Corporation Electrostatic clutch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3343635A (en) * 1965-03-12 1967-09-26 Gen Electric Co Ltd Electrostatic clutches
US4393967A (en) * 1979-11-05 1983-07-19 International Business Machines Corporation Electrostatic clutch

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