Improvements in and relating to Electro Medical Apparatus and Brushes for Use therewith.
Year: 1897

page_text: Date of Application, 31st Mar., 1897-Accepted, 25th Sept.,
1897
COMPLETE SPECIFICATION.
Improvements in and relating to Electro Medical Apparatus and
Brushes for Use therewith.
I, CHARLES KLEIN 40 Baker Street, London W. Hair Dresser, 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 :-
This invention consists in improvements in and relating to electro medical
apparatus and brushes for use therewith for the purpose of enabling a current of
electricity of requisite strength to be applied to the surface of the body and the
same is carried out as follows:-
In order that my invention may be fully understood I will now refer to the
annexed drawings in which :-
Figure 1. is a plan view of my improved apparatus.
Figure 2. sectional side elevation of brush constructed and arranged according to
my invention.
Figure 3. plan view of connection plate.
Figure 4. end elevation of contact piece or pivoted switch.
is the source of electricity such as a dry battery or the like which is connected to the
induction coile so that when the pivoted piece b is in the position shewn by the dotted lines
in Figure 4, electrical contact is made between the terminals c and d which closes
the circuit. The secondary coil of the induction coil e is connected to the terminals f
and which may be of any suitable form. The pivoted piece b is raised or lowered
by the sliding rod h, sliding in the guide h' and which has the projection or bent up
parti (Fig. 4) and is connected to and operated by the movable brass casing ; which
covers or incircles the core and to which the sliding rod h is attached, and the rod or
wire which carries the indicator or pointer hand 7, which travels over the graduated
scale m, which is secured to the induction coil as shewn so that an indication of the
strength of the current may be seen.
In the commutator the screwed rod n engages in the screwed support o, being
locked in position by the set screw p. The end q inakes contact with the spring
armature which thus completes the circuit with the primary coil and battery when
the pivotted piece is in the position shewn by the dotted lines in Figure 4, the
usual make and break taking place between the spring armature and the end of
the screwed rod n, s being a disc or thumb piece for facilitating the adjustment of
the screwed rod n in the support o. The course of the primary and secondary
currents are indicated by the dotted lines 12 and 13 respectively.
Referring to Figure 2, the metal disc or plate t is provided with the projections
or the balls u upon which the metal plate v bears, said metal plate being secured in
position by means of the screw pin eo attached to same and which passes through the
back of the brush z and upon which the screw pieco or nut y engages. The disc or
plate t is secured in position by means of the screws z or the like to the back of the
brush. 1 is a flexible plate or disc of india rubber or suchlike material in which the
metallic bristles 2 are carried, the ends 3 of which are so arranged as to make
contact with the plate v when pressure is exerted upon the ends 4 of the bristles 2.
The plate or disc t is connected to the wire 6, and the knob or button 7 is connected

page_text: to, the wire 8. The free ends of these wires being connected to the terminals f
and g it will be seen that when the brush is grasped in the hand so that the knob or
button touches the skin, and the metallic bristles are pressed upon the head or other
part of the body that the secondary circuit will be completed and the current will pass
through the surface touched.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1. The combined construction and arrangement of the various parts substantially
as described and illustrated herein.
2. In electro-medical apparatus of the class herein described: a pivoted or hinged
contact piece operated by a rod or wire sliding in a guide and attached to a movable
core in an induction coil; said movable core carrying a pointer or hand which upon
moving the core gives indications upon a graduated strip; a screwed rod carried in
a support, one end of which engages with the commutator spring, and being locked
in position by means of a set screw in said support; a suitable battery for supplying
the necessary current, all in combination and substantially as described.
3. In brushes for use with electro-medical apparatus: a metallic support or plate
carrying a flexible plate upon which the metallic bristles are so arranged as to make
contact with said plate when pressure is applied; said plate engaging upon
projections upon a plate affixed to the brush and having a conducting wire attached
thereto and situated at a suitable part of the brush aforesaid substantially as
described and for the purpose set forth.