Braking system for use with an arbor of a microscope

Details Braking system for use with an arbor of a microscope Braking system for use with an arbor of a microscope

1982-09-23

1984-09-11

Butler, Douglas C.

Brakes

Rod

188264D, 188265, B65H 5910, F16D 6578

Patent

active

044704844

ABSTRACT:
A balanced braking system comprising a plurality of braking assemblies located about a member to be braked. Each of the braking assemblies consists of a spring biased piston of a first material fitted into a body of a different material which has a greater contraction upon cooling than the piston material. The piston is provided with a recessed head portion over which is positioned a diaphragm and forming a space therebetween to which is connected a pressurized fluid supply. The diaphragm is controlled by the fluid in the space to contact or withdraw from the member to be braked. A cooling device causes the body within which the piston is fitted to contract more than the piston, producing a tight shrink fit therebetween. The braking system is particularly applicable for selectively braking an arbor of an electron microscope which immobilizes, for example, a vertically adjustable low temperature specimen holder during observation. The system provides balanced braking forces which can be easily removed and re-established with minimal disturbance to arbor location.

REFERENCES:
patent: 3103116 (1963-09-01), Kohli
patent: 3151241 (1964-09-01), Herrmann et al.
patent: 3244877 (1966-04-01), Herrmann et al.
patent: 3473636 (1969-10-01), Sand
patent: 3665812 (1972-05-01), Hashimoto et al.
patent: 3795294 (1974-03-01), Pearson
patent: 3939353 (1976-02-01), Shirai et al.
patent: 4077499 (1978-03-01), Baram
patent: 4262194 (1981-04-01), Hayward
patent: 4301371 (1981-11-01), Lieb
patent: 4359247 (1982-11-01), Miller

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