Braking system for use with an arbor of a microscope
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.
- Assignee:
- Dept. of Energy
- Patent Number(s):
- US 4470484
- Application Number:
- TRN: 85-002667
- OSTI ID:
- 5991199
- Resource Relation:
- Patent File Date: Filed date 23 Sep 1982; Other Information: PAT-APPL-422512
- Country of Publication:
- United States
- Language:
- English
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