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Title: Braking system

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 means 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.

Inventors:
Issue Date:
OSTI Identifier:
5614133
Application Number:
ON: DE83018055
Assignee:
ERA-08-054485; EDB-83-178039
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; BRAKES; DESIGN; ELECTRON MICROSCOPES; CONTRACTION; HYDRAULIC EQUIPMENT; PISTONS; THERMAL EXPANSION; EQUIPMENT; EXPANSION; MACHINE PARTS; MICROSCOPES; 420200* - Engineering- Facilities, Equipment, & Techniques

Citation Formats

Norgren, D.U. Braking system. United States: N. p., 1982. Web.
Norgren, D.U. Braking system. United States.
Norgren, D.U. Thu . "Braking system". United States.
@article{osti_5614133,
title = {Braking system},
author = {Norgren, D.U.},
abstractNote = {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 means 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {9}
}