CERTAIN IMPROVEMENTS IN OBTAINING MOTIVE POWER
Year: 1853

page_text: PROVISIONAL SPECIFICATION left by Jean Larmanjat at the
Office of the Commissioners of. Patents, with his Petition, on the
18th August 1853.
(Void by reason of notice to proceed not having been given within the
time prescribed by the Act.)
I, JEAN LARMANJAT, of Paris, in the Empire of France, and of 16,
Castle Street, Holborn, London, do hereby declare the nature of the S
said Invention for "CERTAIN IMPROVEMENTS IN OBTAINING MOTIVE
POWER" to be as follows: -
This Invention consists in the production by means of electricity of
a motive power much greater than hitherto obtained by such means.
In the annexed Drawings Fig. 1, is an end elevation. Fig. 2, is a plan.
A, is a key or handle by which the movement is directed. A button
B, when pressed acts on a spring resting on C, and which has at its
extremity another button D, which fits into one of the openings E, F.
The Drawing represents the machine at rest, the button D, being in an
intermediate opening between E, and F. G, and H, are two catches,
one or other of which is put in contact with one of the pinions of the
commutator according as the button D, is placed in one opening or in
the other. One or other of these catches always presses against one of
the pinions by the spring K, L. These catches are restricted in their
downward course by the buttons G, H.
J, J, brass pinions insulated.

page_text: The electric current from the positive pole is brought into the commu-
tator by means of the piece M, having at its lower part a small cylinder
in which the wire is retained by the screw N. The upper part of the
piece M, is held in continual contact with the pinions J, J, by a light
spring O, which is insulated by the intervention of a small button of
amber or any other insulating material. The mechanism above de-
scribed is supported by a plate of insulating material O', fixed in the
framework. The negative current is communicated to the two catches
by the conductor P, the brass band P.
The magnet Q, is composed of an iron centre piece, around which
are mounted 4 or more rims R, S, T, U, from which a certain number
of teeth project, and are separated from each other by an insulating
body, represented in the Drawings by dots. These magnets are fixed on
the frame of the machine, their common .axis being independent of
their centre piece, and turning freely in journals V, X. This axis
supports at one end the pinion J, J', and communicates by its other a
rotary motion to the fly wheel Z. The rollers are equal in number to
the teeth of the magnet; each of them is an iron cylinder, having an
axis Y, underneath working in journals a, a, a, a, in a plate fixed
on the axis of the magnet. The play of the axis of the rollers in their
journals is regulated by the springs b, b¹, b¹¹, b
The electric current is distributed in the magnets, and serves to
magnetize the iron teeth, which attract the rollers on the insulated
part; the rollers once on the iron teeth, the current is interrupted by
the catch, but the motion being continued the rollers go to the succeed-
ing insulated body; then the catch falling on the pinions, the current is
re-established, and the attraction recommenses.
There is a point of rest when the rollers are on the insulated parts
of the magnet, but this point can be made use of by a second machine,
whose rollers would be on the magnetized part at the same time that
those of the first are on the insulated body, and vice versa.