Electric Excitation of Vacuum Tubes or other Electric Discharge- paths in Parallel Circuit, and Condensers in connection there- with.
Year: 1890

page_text: Date of Application, 14th Mar.,, 1890.
Complete Specification Left, 31st Oct., 1890-Accepted, 14th Feb., 1891
PROVISIONAL SPECIFICATION.
Electric Excitation of Vacuum Tubes or other Electric Discharge-
paths in Parallel Circuit, and Condensers in connection there-
with.
HARRY THEODORE BARNETT Electrical Engineer Canterbury Works Blenheim
Terrace London N.W. do hereby declare the nature of this invention to be as;
follows:-
--
If a number of vacuum-tubes, or paths for the passage of the electric disruptive-
discharge be arranged in parallel circuit, the electric discharge will pass in that one
path or tube offering the lowest resistance & not in the others.
My invention consists of the arrangement of a condenser in each path, for the
purpose, of effecting their simultaneous, excitation.
The capacity of each condenser is conveniently proportioned to the current
requirement of the tube (or other path), in connection therewith.
I construct the condensers which I prefer to employ for this purpose, so that
their inductive capacity, may be varied by either-
(I)-Varying the number of inductors, as occasion may require, they being made
readily removable, so that contact is established with the common conductor, on
their being placed in position.
(II) By arranging the inductors, so that, the distance between them may be
varied.
(III)-Or by arranging them, so that, the greater or less amount of their
surfaces may be counterposed.
I may employ glass or such like for principal parting dielectric, but I effect
the complete insulation by means of some suitable insulator (such as, for instance
paraffin oil), which checks the leakage over the surface of the glass, in a most
efficient manner and decreases the internal flashing distance very materially.
Dated this March 13th 1890.
НАККО
COMPLETE SPECIFICATION.
Electric Excitation of Vacuum Tubes or other Electric Discharge-
paths in Parallel Circuit, and Condensers in connection there-
with.
HARRY THEODORE BARNETT Electrical Engineer 16 Holtham Road N.W. do
do hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement.
If a number of vacuum tubes or paths for the passage of the disruptive electric
discharge be arranged in parallel circuit, the electric discharge will pass in that one
path or tube offering the lowest resistance & not in the others.
My invention consists in the arrangement of a condenser in each path for the
purpose of effecting their simultaneous excitation.
The capacity of each condenser is conveniently proportioned to the current
requirement of the tube or other path in connection therewith or I prefer to employ
for this purpose condensers arranged so that their inductive capacity may be varied
at will by either-
I. Varying the number of inductors as occasion may require, they being made
readily removable & so that contact is established with a common conductor on
their being placed in position.

page_text: II. By arranging the inductors so that the distance between them may be
varied.
III. By arranging them so that a greater or less amount of their surfaces may be
counterposed.
I may employ glass or such like for the principal parting dielectric but I effect
the complete insulation by means of some suitable liquid insulator such as for.
instance paraffin oil, which checks the leakage over the surface of the glass in a
most efficient manner & decreases the internal flashing distance very materially.
Having now particularly described & ascertained the nature of my said inven-
tion & in what manner the same is to be performed I declare that what I
claim is
I. The simultaneous excitation of two or more electric discharge paths (coupled
in parallel circuit) by means of a condenser or condensers directly in each circuit.
II. The varying the quantity of current in one or all of two or more electric
discharge parts (excited in parallel circuit by means of directly interposed
condensers) by varying at will the inductive capacity of the said condensers which
are constructed for that purpose.
Dated this 30th day of October 1890.
HARRY THEODORE BARNETT.