inductive Generators.
Year: 1884

page_text: inductive Generators.
We CHARLES LEIGH CLARKE Engineer and HERBERT JOHN COATES Electrician
both of Cleggs Court, Chapel Street Salford in the County of Lancaster do hereby
declare the nature of our invention for IMPROVEMENTS IN ELECTRICAL MACHINES
KNOWN AS ELECTRO-STATIC-INDUCTIVE GENERATORS to be as follows:-
Our invention relates to an improved method of obtaining light yet effective
contacts between the carriers, and the collecting and distributing system in
electric-generators of the class above referred to, with a minimum expenditure
of force.
"
Instead of either brushes or springs which have hitherto been in use for this
purpose in such machines, (particularly of the self-charging type known as the
Varley" the "Voss" and the "Wimshurst") we employ centrifugal contact pieces
pivoted on, or otherwise attached to the revolving part or parts of the machine,
and placed in electrical contact either with the so called "carriers" or with the
collecting and distributing system according to which part of the machine is
arranged to revolve.
The attachment is made in such a manner that the contact pieces will be
extended or flung out by the centrifugal force which is developed by the
revolution.
"
Conductors are arranged for these to rub against during the revolutions, these
conductors being either the so called "carriers' or forming the collecting and dis-
tributing system, that is to say, if the "carriers" revolve the contact pieces are
placed in electrical communication and revolve with them, and during the revolu-
tions rub against the conductors forming the collecting and distributing system;
or if the collecting and distributing system is arranged to revolve, they are con-
nected with the conductors forming that system, and during the revolutions rub
successively against the carriers.
By this arrangement of centrifugal contact pieces we obtain contacts at once
light and effective, as the centrifugal force developed is sufficient to keep the light
contact pieces up to their work, and yet they are left free to move easily, and give
way or yield to any inequality or resistance in the parts with which they are
brought in .contact.
GEORGE DAVIES,
Agent for the Applicants,
4, St. Ann's Square, Manchester,;

page_text: inductive Generators.
We CHARLES LEIGH CLARKE Engineer, and HERBERT JOHN COATES Electrician,
both of Cleggs Court, Chapel Street Salford in the County of Lancaster do hereby
declare the nature of our invention for "IMPROVEMENTS IN ELECTRICAL MACHINES
KNOWN AS ELECTRO-STATIC-INDUCTIVE GENERATORS" and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement :-
Our invention relates to an improved method of obtaining light yet effective
contacts between the carriers and the collecting and distributing system in
electric generators of the class above referred to, with a minimum expenditure
of force.
Instead of either brushes or springs which have hitherto been in use for this
purpose in such machines, (particularly of the self-charging type known as the
"Varley," the "Voss" and the "Wimshurst") we employ centrifugal contact pieces
pivoted on, or otherwise attached to the revolving part or parts of the machine,
and placed in electric contact either with the so called "carriers" or with the
collecting and distributing system according to which part of the machine is
arranged to revolve.
The attachment is made in such a manner that the contact pieces will be
extended or flung out by the centrifugal force which is developed by the
revolution.
Conductors are arranged for these to rub against during the revolutions, these
conductors being either the so called "carriers," or forming the collecting and
distributing system; that is to say, if the carriers revolve the contact pieces are
placed in electrical communication and revolve with them, and during the revolu-
tions rub against the conductors forming the collecting and distributing system,
or if the collecting and distributing system is arranged to revolve, they are con-
nected with the conductors forming that system, and during the revolutions rub
Buccessively against the carriers,
Such being the nature and object of our said invention we will now proceed to
describe in detail the manner in which the same is to be or may be performed or
carried into practical effect, and in order that the same may be clearly understood
we have annexed hereunto a sheet of drawings illustrating our invention when
applied to an apparatus of cylindrical form in which the carriers are made to
revolve.
Fig. 1. is a plan of the revolving cylinder which holds the carrier. Fig. 2 is
a sectional elevation of the same. Figs. 3. and 4 are similar views of a modification
hereinafter described. Figs. 5 and 6. are also similar views of a second modifi-
cation of our invention.
Fig. 7. is a transverse section through the outer stationary cylinder which
supports the collecting and distributing system.
Fig. 8. is a sectional plan of this outer cylinder (looking upwards) taken through
the line y on Fig. 7.-and Fig. 9. is a similar view (through the line v-z on
Fig. 7.) Fig. 10. is a sectional plan shewing both cylinders.

page_text: a, a is the inner revolving cylinder b, b, b are the carriers to one end of which
are connected the centrifugal contact pieces c, c-d, d is the pinion whereby the
cylinder a, a is caused to revolve by any suitable gearing.
When the cylinder a, a revolves the centrifugal pieces c, c are thrown outwards
(as at Fig. 10) against the small metal strips e, e, el, el, ell ell, which are supported
by the outer cylinder f. f (see Figs. 7 and 8) e, e being connected to the armatures
or thin metal sheets g g also supported on the outer cylinder f, ƒ (see Figs. 7 and 9)
el, et are connected together by the wire s, and ell, ell are connected by the
springs t, t or other convenient means to the sparking points.
Figs. 3 and 4 show how the centrifugal pieces may be prevented from getting
into the wrong position by mounting them on the flat top or bottom of the
cylinder a, a and forming thereon or attaching thereto a raised disc or rim which
serves as a stop or limit to the inward movement of the pieces c, c.
The same object may also be attained by forming the pieces c, c with tail pieces
which project downwards into and are arrested by the inside of the cylinder a, a
on which they are mounted (see Figs. 5 and 6).
By any of the above arrangements of centrifugal contact pieces we obtain
contacts at once light and effective, as the centrifugal force developed is sufficient
to keep the light contact pieces up to their work, and yet they are left free to move
easily and give way or yield to any inequality or resistance in the parts with
which they are brought in contact.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
The construction and employment in electrical machines known as electro-
static-inductive generators of centrifugal contact pieces (in lieu of springs or
brushes) pivoted on or otherwise attached to the revolving part or parts of the
machine and placed in electric contact either with the (so called) " carriers" or
with the collecting and distributing system, according to which part of the machine
is arranged to revolve, substantially as hereinbefore described and illustrated by
the drawings annexed.