or relating to Current Regulators for Electric Batteries.
Year: 1899

page_text: Date of Application, 27th Mar., 1899-Accepted, 29th Apr., 1899
Improvements
'in
COMPLETE SPECIFICATION.
or relating to Current Regulators for Electric
Batteries.
I, MANES EPHRAIM FULD, 409, N. Paca Street, Baltimore, Maryland, United States
of America, General Manager of the Chloride of Silver Dry Cell Battery Company, a
citizen of the United States, do hereby declare the nature of this invention and in
what manner the same is to be perforined, to be particularly described and
ascertained in and by the following statement :-
My invention relates to an improvement in current regulators for electric batteries,
especially those designed for medical purposes.
The object of my invention is to produce a regulator capable, when used with a
suitable electric battery of small size, of producing currents of different intensities,
varying gradually from a barely imperceptible current to the strongest one which the
patient can endure, and whereby by the use of ordinary switches, a current shunted
from the primary may be used, or a secondary current of varying strength or a com-
bination thereof.
In the accompanying drawings, wherein the same letters represent the same
parts;
Figure 1 is a bottom plan view of my improved current regulator.
Figure 2 is a longitudinal vertical sectional view, taken on the line 2-2 of
Figure 1; and
Figure 3 is a diagrammatic view, showing the various circuits and their connections
with the regulator and terminals.
A represents the top of a casing for a battery, to which is screwed, or otherwise
fastened, the regulator casing B.
This casing is cylindrical in form, closed at the top and open at the bottom. The
sile of the cylinder is comparatively short. There is a downward projection b in the
center of the cylinder, and in a perforation therein is journalled the rotary handle C.
This cylinder is of hard rubber, or some other insulating material, and is provided
with two brass terminal strips 61, 62, separated by a rubber strip 68. A layer of
graphite 64, or of some poor conductor, is placed on the under side of the top of the
cylinder, and runs in a circular path from the terminal 6¹ to the terminal 62, partially
covering both terminals, which are provided with apertures for the reception of wires
conveying the electric current.
The handle C is provided with an enlarged milled head c, and with a smaller
portion c¹, journalled in the projection b. The lower part of the handle is screw-
threaded at c, and a nut holds the rotary contact piece c' against the projection b.
This contact piece is perforated so as to slip over the part c³ of the handle, and is
bent so that its outer portion, which is provided with bent up edges, may contact with
the graphite layer at all times.
D D¹ represent wires contacting with the terminals b¹ 62, and these wires are
connected with the circuit wires. E represents a contact strip, connecting one of the
circuit wires with the handle C.
In Figure 3 is represented a diagram of the circuits and a bottom view on a smaller
scale of the regulator casing.
•

page_text: F represents the battery, and f the main circuit, which passes around the usual
electro-magnet f¹ and interrupter G. This main circuit is provide with a shunt
circuit, one branch of which, f, is divided, one wire passing to the terminal H,
from which, and from the other terminal H¹, run circuit wires to deliver the
current to the patient. The other branch of the shunt circuit is connected to
the terminal b¹, while the other branch of the circuit carries the terminal H¹
with the handle C. By this arrangement, which is completely independent of
any secondary circuit, a current may be furnished at the terminals to be taken
by the patient.
The secondary circuit is shown by the dotted line I, which, however, is shown
in full lines around the electro-magnet f¹. The secondary circuit, which communi-
cates with the terminal H is divided into two branches, one of which i, is connected
with the contact strip and the other passes around the electro-magnet f¹ and is
connected to the other contact strip b¹.
By means of appropriate switches, which are not shown, but the use of which will
be obvious to any electrician from the circuits shown in Fig. 3, the shunt circuit from
the primary may be used, or one-half of the secondary coil, or the whole of the
secondary coil, or a combination of the shunted primary circuit with either a half or
the whole of the secondary circuit, as desired.
Having thus described the nature of my said invention, and ascertained the
manner in which the same is to be performed, I declare that what I claim is :-
1. A current regulator, as shewn in Figures 1 and 2.
2. An electric battery, with primary and secondary circuits connected with a
egulator as shown in Figure 5.
Para as SHOWN In Figures.
Dated this 27th day of March 1899.
TONGUE & BIRKBECK,
Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.