A New or Improved System of Jointed Levers for the Transmission of Motive Power.
Year: 1895

page_text: Date of Application, 7th Jan., 1895-Accepted, 9th Feb., 1895
COMPLETE SPECIFICATION.
A New or Improved System of Jointed Levers for the Transmission
of Motive Power.
I, ADOLPHE MARIE CHARLES FREDERIC AUBERT, of St. Etienne-de-Mont-
Luc, Loire-Inferieure, in the Republic of France, Gentleman, 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 and
accompanying drawing, that is to say :—
My present invention has for its object a novel arrangement of levers, by means
of which the progressive increase of power, obtained by the mutual reaction of two
levers suitably connected together, so that the angle between them is gradually
increased, is utilized for the transmission of motive power.
In the accompanying drawing, which is in illustration of my invention,
Figures 1 and 2 represent two similar arrangements of my improved system of
levers, Figure 1 shewing the curved faces which work against each other, pro-
vided with teeth, whilst Figure 2 shews these curved faces simply in contact with
each other.
Figure 3 illustrates the method of jointing or connection by which the piston
rod F of a motive power engine is made to act upon the first lever A which
oscillates round a fixed point C; and
Figure 4 shews an arrangement of spring, the object of which is hereinafter
explained.
The first lever A is connected to the second lever B, which is of nearly similar
form, in such manner that the oscillating movement which the motor communicates
to the lever A is converted into a movement of rotation at the other end of the
lever B, which works upon a crankpin D, with a gradual increase of the power
transmitted. The fixed axis C turns in a bearing rigidly fixed to or formed upon
the frame of the machine, or directly to the support of the main shaft.
The two faces of the levers, which work against each other, have the form of
sectors, and are connected together by crossed connecting links jointed to them, as
shewn. The rolling surfaces R, Figure 3, of these sectors may be provided with
teeth gearing together, as illustrated in Figure 1.
In the drawings, the point at which the motive force is applied is supposed to be
at g, by means of two pins fixed at the two sides and jointed to a forked connecting
rod F connected to the piston rod.
The point at which the power is applied may, however be situated at any other
convenient point, for example at f, always observing the condition that where
motive-power cylinder engines such as steam cylinders, are used, the cylinders
should be arranged at the proper angle.
In order to prevent the levers from jamming at the lower end of their stroke,
that is to say, when their centres are in line with each 'other, a spring E may be
arranged at this point, or other equivalent mechanical device may be used for the
same purpose, that is to say, to raise the deadweight of the gear in case of stoppage,
a supplementary admission, for instance, being given.
It will be seen that, by means of the mechanism described, a constant force
applied at the point g, will communicate a gradually increasing force to the crank;
or inversely, if the power be represented by a gradually decreasing fraction, the
force which overcomes the resistance of the main shaft will remain practically
constant; this gradual increase of effective force depending upon the increase of

page_text: the angle made between the two levers, and consequently, being capable of being
regulated as desired to suit different circumstances and conditions.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
--
A system of jointed levers for the transmission of motive power, consisting of
the combination of two levers working together, one. oscillating on a fixed centre
and driven by the piston rod, or other. part of a motive power engine, whilst the
free end of the other is jointed to and drives, a crankpin to which it therefore
transmits a gradually increasing force, substantially as described and illustrated.
Dated this 7th day of January 1895.
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicant.