A See-saw Roundabout.
Year: 1890

page_text: Date of Application, 21st Nov., 1890
Complete Specification Left, 18th Sept., 1891-Accepted, 24th Oct., 1891
PROVISIONAL SPECIFICATION.
A See-saw Roundabout.
I, JOHN THOMAS BOWER, of London Road, Sittingbourne, in the County
of Kent, Engineer, do hereby declare the nature of this invention to be as
follows:
--
My invention relates to a see-saw apparatus for public recreation and has
for its object to cause the see-saw or oscillating platform to rotate so that
the several seats upon the platform are successively brought to the point of
greatest oscillation.
In carrying out my invention I advantageously provide an oscillating frame
mounted upon a rock-shaft which frame is connected by rods to cranks diametri-
cally opposite to one another on a crank shaft in such a manner that as the
crank shaft rotates the oscillating frame will be raised first at one side and then at
the other.
Upon the top of the oscillating frame is a table or platform adapted to rotate
upon its centre and to oscillate with the frame, rollers or balls being placed between
the platform and frame to reduce friction as much as possible. In order that
motion shall be imparted to this platform the same is advantageously geared upon
its edge so as to engage with a bevel wheel running loosely on the rock-shaft and
driven by a chain and sprocket wheels or other suitable means from the driving
shaft.
Dated the 21st dow of November 1890
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE
SPECIFICATION.
A See-saw Roundabout.
I, JOHN THOMAS BOWER, of London Road, Sittingbourne, in the County
of Kent, Engineer, 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 :-
My invention relates to see-saw apparatus for public recreation, and has
for its object to cause the see-saw or oscillating platform to rotate so that the
several seats upon the platform are successively brought to the point of greatest.
oscillation.
In carrying out my invention I advantageously provide an oscillating frame
which is connected to a crank-shaft in such a manner that as the crank-shaft
rotates the oscillating frame will be raised first at one side and then at the
other.
Upon the top of the oscillating frame is a table or platform adapted to rotate
upon its centre and to oscillate with the frame, rollers or balls being placed
between the platform and frame to reduce friction as much as possible. In order
that motion shall be imparted to this platform the same is advantageously geared
upon its edge so as to engage with a bevel-wheel driven by a chain and sprocket
wheels or other suitable means from the driving shaft.

page_text: To enable my invention to be fully understood I will describe the same with
reference to the accompanying drawings, in which :-
Figure 1 is a sectional elevation of a see-saw roundabout constructed according
to my invention; and,
Figure 2 is a sectional view at right angles to Figure 1.
Figures 3 and 4 are sectional views at right angles to each other illustrating a
modified arrangement of my invention.
Similar letters of reference indicate corresponding parts in the several figures.
a indicates the base or framing on which the mechanism is mounted, and the
oscillating frame, the said frame being carried upon the base a by means of the
pivots or pins c, c².
As shewn in Figures 1 and 2 the frame is oscillated from the crank-shaft d,
carried in plummer-blocks e, e, through the medium of the connecting-rod ſ, which,
at one end, is jointed as at g to the bush or bearing upon the crank pin of the
crank gland, at the other end, connected to the platform by a universal joint h,
this arrangement permitting the oscillations of the frame b to take place without
straining the connecting-rod or crank.
As shewn, motion is communicated to the crank-shaft & through the medium of
the bevel-wheels i, i, the shaft ;, and the belt pulley j¹.
& is the rotating platform which is secured to the plate 4, the said plate being
free to rotate around a boss 6' upon the oscillating frame b, and being carried
upon the said oscillating frame by means of anti-friction rollers m, m. Upon the
edge of the plate are gear-teeth n with which a bevel-wheel o rotating upon an
extension of the pin e engages. Motion is imparted to this bevel-wheel o, and thus
to the plate and to the platform & carried thereby, from the bevel-wheel & through
the medium of the bevel-pinion p, the shaft q, the sprocket wheels r, r², and the
chain s.
It will thus be understood that at the same time that an oscillating motion
is being imparted to the oscillating frame b through the medium of the crank y¹
and connecting-rod fa rotary motion is being imparted to the plaform k.
t is a pillar connected to the boss and serving with the said boss as a chimney
through which the products of combustion from the engine for operating the
apparatus may pass. indicates a flue pipe extending into the lower end of the
chimney t, the connection between the said flue pipe and the chimney being concentric
with the pivots c, c' upon which the oscillating frame moves, so that no movement
is imparted to the said flue.
u, u are guy-ropes or rods extending from the upper part of the chimney to the
outer portion of the platform in order to support the same. v, v are seats upon the
said platform.
In the modification of my invention shewn in Figures 3 and 4 the oscillating
platform, instead of being operated by the crank through the medium of the
connecting-rod, is operated directly by the said crank: in this case the underside
of the said oscillating platform is provided with an arm w having a slot in which a
block y upon the crank is designed to slide in a well known manner. In this arrange-
ment a rotary motion is imparted to the plate / directly from the crank-shaft, as
shewn most clearly in Figure 3.
20
I sometimes modify the last described arrangement by dispensing with the
slot in the arm to, and connecting the crank to the said arm by means of a
connecting rod.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A see-saw roundabout so arranged that an oscillating as well as a rotary
movement can be imparted to the platform thereof, substantially as described.
2. In a see-saw roundabout, the combination with an oscillating frame of a plat-
form adapted to be rotated upon the said frame, substantially as described.

page_text: 3. The manufacture and use of a roundabout substantially as herein before
described with reference to Figures 1 and 2 of the accompanying drawings.
4. The modification of my invention substantially as described with reference to
Figures 3 and 4 of the accompanying drawings.
Dated the 18th day of September 1891.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.