Improved Mechanism for Transmission of Force.
Year: 1896

page_text: Date of Application, 9th June, 1896-Accepted, 5th Dec., 1896
COMPLETE SPECIFICATION.
Improved Mechanism for Transmission of Force.
We, SOPHUS HARTMANN of Berlin, Tempelhofer-Ufer 18, Manufacturer, and
HERMANN BULTMANN of Bremen, Obernstrasse 21, in the Empire of Germany,.
Merchant, 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 improved force-transmission mechanism is shown in the annexed drawings.
in which Fig. 1 shows an elevation and Fig. 2 is a horizontal cross-section. A is.
the shaft which gives the power and B is the shaft to which the power has to be
transferred. The crank C of the shaft A engages with its pin c in a slot d of the
lever D which is fulcrumed with its gudgeons d1d1 in the bearings E E.
Upon the shaft B is keyed a pulley, F. Opposite to the latter is a pulley F 1 of
equal or other diameter which is keyed upon a shaft f. Both pulleys are
connected by means of an endless strap G which however is not laid taut, but
hangs loosely. The under part of the strap is carried by rollers h of the pillar
bearings H. Over the upper parts are arranged also similar guiding-rollers h 1 in.
hangers H 1.
To the lever D are connected on its shorter arm the rods J J 1 the latter of
which is guided between the rollers i i. J is again connected with the lever K,.
the gudgeon k of which is journalled over the guiding-roller in the bearing H.
This lever K is connected at its other end by means of a pin k 1 in a slot k 2 on the
end of the lever K1 which journalled like K extends with its end pin in the same
manner again into the slot k3 of the lever K 2. On the two ends of the lever K2
are provided a couple of rollers k4 k5 between which the strap passes. The
rod J 1 is connected by means of a rod J 2 with the lever L which in the same-
manner as above described with reference to the levers K K1 K2 is connected
with levers L1 and L2; also here the rollers 15 and 16 fixed on levers L 2-
and L1 guide the strap.
When the crank C turns in the direction of the arrow, the longer arm of the
lever D makes a downward movement, until the lowest position of the crank is.
reached as shown in the drawing the guide-rollers k 4 and 6 are equally pressed
downwards, whilst the rollers k 5 are raised.
The length of the strap is measured in proportion to the length of the levers, so.
that the strap thus stretched and moved in the direction of the arrow X. The
upper part of the strap comes in the meantime into the position shown in the
drawing. When the movement of the crank continues, so that it, together with
the lever d, rises, the lower lever system K K1 K2 takes the dotted position,
whilst the rod J1 is drawn downwards into the dotted position, the rod J 2 is
raised and the rollers 16 and 14 are pressed downwards, so that the upper part of
the strap moves in the direction of the arrow Z, whereby a continuous revolution.
of the pulleys takes place in the direction of the arrows.
Having now particularly described and ascertained the nature of this inven-.
tion and in what manner the same is to be performed I declare that what I
claim is :-
Improved mechanism for transmission of power comprising a double armed lever,
which is operated in oscillatory movement by means of a motor-shaft and which
by means of connecting rods moves two systems of double-armed levers connected

page_text: together, alternately in straight or broken line, so that an endless strap guided
over these levers and over pulleys is alternately stretched and relaxed and thus
drives a shaft or shafts carrying the said pulleys.
Dated this 9th day of June 1896.
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, W.C., Agents for Applicants.