skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Tube furnace

Abstract

A vermiculite insulated tube furnace is heated by a helically-wound resistance wire positioned within a helical groove on the surface of a ceramic cylinder, that in turn is surroundingly disposed about a doubly slotted stainless steel cylindrical liner. For uniform heating, the pitch of the helix is of shorter length over the two end portions of the ceramic cylinder. The furnace is of large volume, provides uniform temperature, offers an extremely precise programmed heating capability, features very rapid cool-down, and has a modest electrical power requirement.

Inventors:
 [1];  [2];  [1];  [1]
  1. (Livermore, CA)
  2. (San Ramon, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
868088
Patent Number(s):
5072094
Assignee:
United States Department of Energy (Washington, DC) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
tube; furnace; vermiculite; insulated; heated; helically-wound; resistance; wire; positioned; helical; groove; surface; ceramic; cylinder; surroundingly; disposed; doubly; slotted; stainless; steel; cylindrical; liner; uniform; heating; pitch; helix; shorter; length; portions; volume; provides; temperature; offers; extremely; precise; programmed; capability; features; rapid; cool-down; modest; electrical; power; requirement; provides uniform; uniform heating; electrical power; stainless steel; uniform temperature; shorter length; ceramic cylinder; resistance wire; tube furnace; wire positioned; surroundingly disposed; uniform heat; power requirement; cylindrical liner; /219/

Citation Formats

Foster, Kenneth G., Frohwein, Eugene J., Taylor, Robert W., and Bowen, David W. Tube furnace. United States: N. p., 1991. Web.
Foster, Kenneth G., Frohwein, Eugene J., Taylor, Robert W., & Bowen, David W. Tube furnace. United States.
Foster, Kenneth G., Frohwein, Eugene J., Taylor, Robert W., and Bowen, David W. Tue . "Tube furnace". United States. https://www.osti.gov/servlets/purl/868088.
@article{osti_868088,
title = {Tube furnace},
author = {Foster, Kenneth G. and Frohwein, Eugene J. and Taylor, Robert W. and Bowen, David W.},
abstractNote = {A vermiculite insulated tube furnace is heated by a helically-wound resistance wire positioned within a helical groove on the surface of a ceramic cylinder, that in turn is surroundingly disposed about a doubly slotted stainless steel cylindrical liner. For uniform heating, the pitch of the helix is of shorter length over the two end portions of the ceramic cylinder. The furnace is of large volume, provides uniform temperature, offers an extremely precise programmed heating capability, features very rapid cool-down, and has a modest electrical power requirement.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}

Patent:

Save / Share: