A Crane in Combination with Means for Operating Lifting Tongs.
Year: 1894

page_text: Date of Application, 3rd May, 1894
Complete Specification Left, 2nd Feb., 1895-Accepted, 16th Mar., 1395
PROVISIONAL SPECIFICATION.
A Crane in Combination with Means for Operating Lifting Tongs.
We, JOHN FREDERICK ALBERT SMITH, Steel Worker, JAMES MADISON
BRYANT, Nailer, and LORENZA DAVIS ULLAN, Steel Worker, all of Benwood
Village, County of Marshall, West Virginia, U.S.A., do hereby declare the nature
of this invention to be as follows: :-
In this invention the crane is in the form of a jib pivotted on a vertical shaft
and on the upper horizontal arm of which jib the crane carriage from which
depends the hoisting tackle is moved to and fro. In combination with the crane
carriage there is a steam, compressed air or other cylinder the bottom end of the
piston of which is jointed to two toggle levers whose other extremities are jointed
to the two arms of a pair of tongs so that when the piston rod moves in one
direction the jaws of the tongs are opened and when in the other direction closed
to grasp a weight. The two legs of the tongs are in connection with the crane
carriage through a lifting chain.
Dated this 3rd day of May 1894.
THOMAS R. SHILLITO,
89, Chancery Lane, London, W.C., Agent for the Applicants.
A Crane in Combination with Means for Operating Lifting Tongs.
We, JOHN FREDERICK ALBERT SMITH, Steel Worker, JAMES MADISON
BRYANT, Nailer, and LORENZA DAVIS ULLAN, Steel Worker, all of Benwood
Village, County of Marshall, West Virginia, U.S.A., 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 mechanical arrangement in cranes whereby power
may be applied to open and close the jaws of tongs so as to open and release or to
grasp their load.
In the drawing is shewn in side elevation an ordinary crane having the
arrangement of the invention applied in connection with the carriage and tongs
thereof.
1 is an upright carrying a jib 2 journalled thereon. The jib has a double track
of the ordinary form upon which runs a four wheeled carriage 3 worked to and fro
by any suitable means as for instance by the cylinder 4 and piston rod 5 in
connection with the carriage by pipes in front and rear of the piston for supplying
the medium by which the carriage may be operated. The carriage body is
provided between the wheels with the support 6 for the hoisting chain 7 of the
tongs 8, the said chain being divided at 9 and terminating in two branches 10
and 11 one of which is connected to each arm 8* of the tongs at the upper end
thereof. 8 are the gripping faces of the tongs. 12 are toggle levers for opening
and closing the jaws of the tongs. They are pivotally connected to the arms 8
and to each other as at 13 and to the pivot at 13 is connected the lower end of the
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page_text: piston rod 14. This piston rod has an angularly bent portion 15 so that the maiu
portion of the piston rod lies on one side of the lower part which is connected to
the toggle joint, and thus the upper part is brought to one side of the hoisting and
supporting chain which holds the tongs. The upper end of the piston rod extends
into a vertical cylinder 16 carried upon the carriage and provided with suitable
inlet and exhaust pipes 17 and 18 connected to the top and bottom of the cylinder
respectively, and through which pipes, steam, water, compressed air or the like can
be admitted and withdrawn from above and below the piston to reciprocate the
piston rod. The lower portion of the piston rod for operating the tongs may be
detachably connected to the main portion by a suitable screw connection such as
shewn at 14ª or by a key.
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 :-
1. In combination with the carriage of a crane, the tongs suspended therefrom,
toggle levers connected to said tongs, a cylinder mounted upon the carriage having
inlet and exhaust pipes, and a piston rod depending from said cylinder having its
lower end offset to one side of the main portion and connected to the toggle levers
for operating the tongs, substantially as described and shewn.
2. In combination with the carriage of a crane, the tongs suspended therefrom,
toggle levers connected to said tongs, a cylinder mounted upon the carriage having
inlet and exhaust pipes, a piston rod in said cylinder and a detachable rod connected
to said piston rod, said detachable rod having an angular offset part the lower end
of which is connected to the toggle levers, substantially as described and shewn.
Dated this 2nd day of February 1895.
.THOMAS R. SHILLITO,
89, Chancery Lane, London, W.C., Agent for the Applicants.