Braking system for use with an arbor of a microscope
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.
- Inventors:
-
- Orinda, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 865151
- Patent Number(s):
- 4470484
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- braking; arbor; microscope; balanced; comprising; plurality; assemblies; located; braked; consists; spring; biased; piston; material; fitted; contraction; cooling; provided; recessed; head; portion; positioned; diaphragm; forming; space; therebetween; connected; pressurized; fluid; supply; controlled; contact; withdraw; device; causes; contract; producing; tight; shrink; fit; particularly; applicable; selectively; electron; immobilizes; example; vertically; adjustable; temperature; specimen; holder; observation; provides; forces; easily; removed; re-established; minimal; disturbance; location; braking force; easily removed; electron microscope; particularly applicable; pressurized fluid; space therebetween; shrink fit; specimen holder; spring biased; cooling device; vertically adjustable; braking assemblies; device causes; /188/
Citation Formats
Norgren, Duane U. Braking system for use with an arbor of a microscope. United States: N. p., 1984.
Web.
Norgren, Duane U. Braking system for use with an arbor of a microscope. United States.
Norgren, Duane U. Sun .
"Braking system for use with an arbor of a microscope". United States. https://www.osti.gov/servlets/purl/865151.
@article{osti_865151,
title = {Braking system for use with an arbor of a microscope},
author = {Norgren, Duane 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 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1984},
month = {Sun Jan 01 00:00:00 EST 1984}
}