An Improved Lifting Jack or Apparatus.
Year: 1890

page_text: Date of Application, 19th Feb., 1890-Accepted, 12th Apr., 1890
COMPLETE SPECIFICATION.
An Improved Lifting Jack or Apparatus.
We, JEAN PIERRE CITO, of Petange, Mechanician and PIERRE FUNCK, of
Luxemburg, Architect and Engineer, both in the Grand Duchy of Luxemburg, 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:
In the apparatus for lifting weights which forms the subject of this invention, a
lifting lever is supported in a suitable bottom plate of the frame and has a roller upon
which acts the eccentric cam of a hand lever placed in different notches of the said -
With the lifting
frame according to the height to which the weight is to be raised.
lever is connected a link which in every case keeps the weight raised through the
medium of a pin that prevents a back movement of the locking arm and of the
lifting lever, this pin being situated between the frame and a bent locking arm
adapted to be turned on the said frame and placed eccentrically to the pivot of the
lifting lever.
In Figures I to III of the accompanying drawing the improved apparatus is shown
in side elevation, plan and rear elevation.
The lifting lever R to be applied to the weight to be raised, for example, to a
railway rail, has its pivot at C in the bottom plate G of the frame. This bottom
plate is firmly connected with curved cheeks v, the outer periphery of which is
nearly concentric with the pivot C and is provided with notches wherein the hand
lever F is placed. The rear arm of the lifting lever R is forked and carries at its
end a roller r, upon which acts the eccentric cam of the hand lever F, Figure I.
The latter carries a cross pin t placed eccentrically to the can, which pin
placed below the hooks formed by the notches of the curved cheeks v, whilst the cam
bears upon the roller r of the lifting lever, so that by means of the hand lever and
its eccentric cam acting upon the roller of the lifting lever the rail or the like can be
lifted.
can be
For locking the lifting lever R the lower cross pin of the link made in the
form of a frame is adapted to be displaced in an elongated eye formed in the rear arm
of the said lever, so that the upper cross pin C of the said link is enabled, in the
movement of the hand lever F, to slide down between the curved cheek of the
frame, and a bent locking arm z pivoted at y, which arm moves upward through
the fork of the lifting lever R, and bears against a tongue 9 adapted to turn upon a
bolt and placed concentrically with the said arm between the fork of the lifting lever.
The locking is caused by the link I after the weight has been raised a short distance
inasmuch as the hand lever F is liberated and the pin c is clamped between the
arm and the curved cheeks by the pressure of the tongue 9 of the lifting
lever R upon the said arm z placed eccentrically to the pivot C, so that the weight
is in every case maintained at the height to which it has been raised. If the weight
is to be raised further, the said pint of the hand lever F is placed in a notch
below, and this is repeated until the weight has been raised to the desired height.
After the weight has been raised the apparatus is liberated by placing the upper
forked end of the hand lever F Figure IV between the link and the lifting
lever R, and forcing the said link upwards so that the cross pin c is raised without
moving the load from the position to which it has been lifted.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
An apparatus for lifting weights characterized by a lifting lever (R) pivoted in a

page_text: bottom frame, upon its free end acting the eccentric cam of a hand lever (F) to be
placed in different notches of the frame in accordance with the height to which the
weight is to be raised, whilst with the lifting lever (R) is connected a link (1)
which in every case keeps the weight raised by means of its pin (c) placed between
the bent locking arm (2), pivoted to the frame and arranged eccentrically to the
pivot of the said lifting lever, the said link preventing the back movement of the
arm (2) and of the lifting lever.
Dated this 19th day of February 1900
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.