Link Mechanism for the Transmission of Force.
Year: 1896

page_text: Date of Application, 27th Feb., 1896-Accepted, 4th Apr., 1896
COMPLETE SPECIFICATION.
Link Mechanism for the Transmission of Force.
We, SOPHUS HARTMANN of Tempelhofer-Ufer 18, Berlin, in the Empire of
Germany, Manufacturer, and EDMUND FALKE, of Reichenbergerstrasse 12, Berlin,
in the Empire of Germany, Foreman, 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 relates to a mechanism for transmission of force inserted between
the driving shaft of a motor and a shaft to be driven therefrom and intended to
aagment the force of the motor by a lever transmission and afterwards augment
the velocity diminished by such increase of power.
This object is attained by the connection of the crank of the notor with the
longer arm of a two armed lever in order that the similar arm may move with
augmented force, but as this is effected with the loss of velocity the latter is
augmented, by transferring the rocking movement of the lever to a
cross head
moving in guides, and the movement of the latter to the first member of a pivoted
trellis usually termed "lazy tongs" in which the increase of velocity of the last
member is proportional to the number of the members. The augmented velocity
of the final member is then transferred to the shaft to be driven by means of a
cross head in guides, a connecting rod, and a crank.
The annexed drawing shows the invention in two side views and one plan.
The unequally armed lever b, c, carried by the bearing a engages with the
slot d provided in its longer arm c on the crank pin of the motor shaft e; there-
fore the arm rocks with an augmentation of force corresponding to the proportion
between the two arms. The rocking movement of the lever b is transformed in
a horizontal one by means of the rod y and the cross head h. To the latter is
fixed by means of the rod i the first member of the lazy tongs k, the first pin / of
which revolves in the stationary bearing m, whilst the last pin slides by means
of the cross head n in the guides o. Its horizontal movement is transferred by
means of the connecting bar p into a rotary one upon the crank q.
Figs. 1 and 2 show in elevation the two extreme positions of the cross head, the
first shows the lazy tongs k in closed, the second in opened position. Fig. 3 is
a plan view of Fig. 2.
As the lever b, c can be fulcrumed at different points upon the bearing, the
augmentation of the force and of the velocity and the extension of the tongs k
can be easily regulated.
Having now particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
Mechanism for transmission of force consisting of an unequally armed lever b, c,
for instance connected to a motor shaft e, the augmentation of force effected by
the lever being transferred to cross bead h moving in guides and from there to a
system of pivoted levers similar to those of lazy tongs k which operates by means
of the crosshead n and the connecting rod p, the crank g of the shaft r to be
driven.
D
1
1000
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicants.