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

Title: LEAD SEVERING CONTRIVANCE

Abstract

A means for breaking an electrical circuit within an electronic tube during the process of manufacture is described. Frequently such circuits must be employed for gettering or vapor coating purposes, however, since an external pair of corector pins having no use after manufacture, is undesirable, this invention permits the use of existing leads to form a temporary circuit during manufacture, and severing it thereafter. One portion of the temporary circuit, made from a springy material such as tungsten, is spot welded to a fusable member. To cut the circuit an external radiant heat source melts the fusable member, allowing the tensed tungsten spring to contract and break the circuit. This inexpensive arrangement is particularly useful when the tube has a great many external leads crowded into the tube base.

Inventors:
Issue Date:
OSTI Identifier:
4318742
Patent Number(s):
2829293
Assignee:
U. S. Atomic Energy Commission
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
NSA Number:
NSA-12-014440
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-58
Country of Publication:
United States
Language:
English
Subject:
PATENTS; CIRCUITS; COATING; CONFIGURATION; DEFECTS; ELECTRON TUBES; FABRICATION; HEATING; LEAD; MELTING; PATENT; TUNGSTEN; VAPORS; WELDING

Citation Formats

Widmaier, W. LEAD SEVERING CONTRIVANCE. United States: N. p., 1958. Web.
Widmaier, W. LEAD SEVERING CONTRIVANCE. United States.
Widmaier, W. Tue . "LEAD SEVERING CONTRIVANCE". United States.
@article{osti_4318742,
title = {LEAD SEVERING CONTRIVANCE},
author = {Widmaier, W},
abstractNote = {A means for breaking an electrical circuit within an electronic tube during the process of manufacture is described. Frequently such circuits must be employed for gettering or vapor coating purposes, however, since an external pair of corector pins having no use after manufacture, is undesirable, this invention permits the use of existing leads to form a temporary circuit during manufacture, and severing it thereafter. One portion of the temporary circuit, made from a springy material such as tungsten, is spot welded to a fusable member. To cut the circuit an external radiant heat source melts the fusable member, allowing the tensed tungsten spring to contract and break the circuit. This inexpensive arrangement is particularly useful when the tube has a great many external leads crowded into the tube base.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1958},
month = {4}
}