IMPROVEMENTS IN RISING AND SINKING PLATFORMS AND TANKS FOR SAME FOR TIREING WHEELS OR OTHER PURPOSES
Year: 1884

page_text: I, JOHN LAKE BAKER of Hargrave in the County of Northampton, Engineer do
hereby declare the nature of my invention for IMPROVEMENTS IN RISING AND
SINKING PLATFORMS AND TANKS FOR SAME FOR TIREING WHEELS OR OTHER PURPOSES
to be as follows:-
Whereas sinking platforms for tireing wheels have hitherto been generally
supported as well as raised and lowered by means of a central screw, this rendered
numerous revolutions of the platform necessary for the purpose of raising or
lowering it at the same time the screw afforded a weak and unsteady support to
the platform. In other cases platforms have been raised or lowered by an
expensive arrangement of wheels and levers.
By my invention the raising and sinking of platforms is rendered more simple
and expeditious. Much greater stability of the platform is obtained and an
economy in the manufacture is effected.
My improved platforms are firmly supported at three points near the circum-
ference upon three balls resting upon three inclined planes or cams, the platform
moves round easily upon the three balls by means of a lever attached to the outer
edge, the balls and platform ascending or descending upon the inclined planes
accordingly as it is turned to the right or left, the platforms and balls are placed in
a tank of water and the wheel to be tired is placed upon the top of the platform
and as soon as the heated tire is placed in position upon the wheel a partial
revolution of the platform plunges the wheel into the water and quickly cools the
tire.
The tanks are constructed as to the bottoms of wood, the sides being composed
of cast iron segments or panels.

page_text: COAL DRIE SIECIFICATION,
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I, JOHN LAKE BAKER, of Hargrave in the County of Northampton, Engineer, do
hereby declare the nature of my invention for IMPROVEMENTS IN RISING AND
BINKING PLATFORMS and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
Whereas platforms for tireing wheels have hitherto been generally supported as
well as raised and lowered by means of a central screw, this rendered numerous
revolutions of the platform necessary for the purpose of raising or lowering it, at
the same time the screw afforded a weak and unsteady support to the platform.
In other cases, platforms have been raised or lowered by an expensive arrangement
of wheels and levers, in other cases cams have been used, working upon fixed
rollers which fixed rollers cause a great deal of friction and are liable to damage.
By my invention the. raising and sinking of platforms is rendered more simple
and expeditious, with a less expenditure of power, much greater stability of the
platform is obtained, and an economy in the manufacture is effected.
My improved platforms D, sco drawing fig. 1 are firmly supported at three
points, near the circumference upon three balls B. B. B. resting upon three inclined
planes or cams C. C. C.
The platform D. moves round easily upon the three balls, by means of a
lever E. attached to the outer edge, the balls and platform ascending or descending
upon the inclined planes, accordingly as it is turned to the right, or left, or the
arrangement may be reversed by attaching the three cams to the under side of the
platform, with the balls underneath the cams, in which case, the platform and cams
ascend and descend, while the balls remain upon the same level, but I give the
preference to the arrangement first described.
The platform, cams and balls are placed in a tank of water A. and the wheel to
be tired is placed upon the top of the platform, and as soon as the heated tire is
placed in position upon the wheel, a partial revolution of the platform plunges the
wheel into the water and quickly cools the tire.
The Section F. G. fig. 2. shows the platform when raised, and H. G. when
lowered.
The Section fig. 3. shows a cam C. reduced to a straight line.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is
The raising and lowering of Platforms for tireing wheels, or for other purposes,
by means of three balls running loose and working respectively upon the surfaces
of three inclined planes or cams.
Daind th
T