IMPROVEMENTS IN ROLLER SKATES
Year: 1876

page_text: LETTERS PATENT to John Henry Palmer, of Sparkbrook, in the County of
Worcester, Gun Maker, for the Invention of "IMPROVEMENTS IN ROLLER
SKATES."
aled the 27th June 1876, and dated the 3rd January 1876.
PROVISIONAL SPECIFICATION left by the said John Henry Palmer at the
Office of the Commissioners of Patents, on the 3rd January 1876.
JOHN HENRY PALMER, of Sparkbrook, in the County of Worcester, Gun Maker.
'IMPROVEMENTS IN ROLLER SKATES."
In my improved skate the pivoting of the carriage of the roller is obtained by
means of segments of right and left handed screws cast upon a metal plate, or
attached thereto in any suitable manner, the rotary motion being conveyed to the
said carriage by the pressure of two steel or other rollers pivoted in the top plate,
the necessary pressure being conveyed by the oscillation of the top plate. The
plate bearing the segments of screws is connected with the said top plate by a bolt
or screw which forms the axis on which the roller carriage revolves. The knuckle
or joint on the top plate is placed at right angles with the axis of rollers acting
upon the said right and left hand screws, and on the same axis as the said knuckle
or joint, and at a convenient distance from the joint are placed two rollers forming
a continuation of the axis on which the bottom plate oscillates.
The roller spindles and carriages of wheels are returned to their normal position
on releaving the carriage from the pressure of the top plate by means of levers
attached to the said carriages, and operated upon by a spring of metal or other
material in tension not in a straight line from carriage to carriage.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Henry Palmer in the Great Seal Patent Office on the 3rd July
1876.
JOHN HENRY PALMER, of Sparkbrook, in the County of Worcester, Gun Maker.
"IMPROVEMENTS IN ROLLER SKATES."
In my improved skate the pivoting of the carriage of the rollers is obtained by
means of segments of right and left handed screws cast upon a metal plate, or
[Price 6d.]

page_text: The
attached thereto in any suitable manner, the rotary motion being conveyed to
the said carriage by the pressure of two steel or other rollers pivoted in the top
plate, the necessary pressure being conveyed by the oscillation of the top plate.
The plate bearing the segments of screws is connected with the said top plate by a
bolt or screw, which forms the axis on which the roller carriage revolves.
knuckle or joint on the top plate is placed at right angles with the axis of rollers
acting upon the said right and left hand screws, and on the same axis as the said
knuckle or joint, and at a convenient distance from the joint are placed two rollers
forming a continuation of the axis on which the top plate oscillates.
The roller spindles and carriages of wheels are returned to their normal position
on relieving the carriage from the pressure: of the top plate by means of levers
attached to the said carriage, and operated upon by a spring of metal or other
material in tension not in a straight line from carriage to carriage.
That my Invention may be fully understood I have annexed Drawings thereof,
which I now proceed to describe.
Fig. 1 is a side elevation; Fig. 2, a rear end elevation; Fig. 3 is an inverted
plan; Fig. 4, an inverted plan of the top plate.
Fig. 5 is the carriage.
And, Fig. 6 is the axis and joint pin.
Similar letters of reference apply to the same parts in all the Figs.
a is the clog or foot rest; b is the top plate attached to the clog; c is a slot
(Fig. 4) in the top plate which is at right angles with a dotted line A, B, drawn
from heel to toe of the skate (Fig. 3), the said slot being to receive the joint pin p
(Fig. 6) on which the top plate oscillates, the joint being formed by means of a
wire e passing through holes d, d (Figs. 2, 4, and 6). This wire e also forms the
axis upon which the steel rollers f, f, revolve. On the outer sides of the top plate
are two bosses g, g, through which pass the wire forming the axes of, the
rollers h, h.
Fig. 5 is an elevation of the carriages i, i, on the outer side of which are
segments of right and left handed screws j, j, and depending from the under surface
of which are brackets k, k, forming the supports for the axles 2 on which the rollers
or wheels m, m, revolve; attached to the carriage are levers n, n, which are for the
purpose of squaring the carriages by means of the spring or springs o, o, acting on
the levers n, n.
Fig. 6 shews the joint and axis pin p on which the top plate oscillates, and round
which the carriage radiates.
Figs. 1 and 2 represent the skate in its normal position. The rollers h, h, rest
upon the segments of screws j, j, and upon pressure being applied to the upper
surface of the top plate on either side of the said top plate, the steel roller h on
that side to which pressure is so applied bearing upon the segment of screw on the
same side of the carriage, causes the said carriage to partly revolve and to assume
the position shewn in Fig. 3; but when the carriage is relieved from pressure on
either of its sides, as aforesaid, it resumes, by means of the said springs and lever,
its normal position, as shewn in Figs. 1 and 2.
Having now described the nature of my said Invention and the manner in
which the same is to be carried into effect, I desire it to be understood, that
without limiting myself to the precise details herein-before contained (as these may
be to some extent varied or modified without departing from the nature of my said
Invention), I desire it to be understood, that I claim as the Invention to be pro-
tected by the herein-before in part recited Letters Patent,-
First. The steel rollers interposed between the top plate and the radial carriage
of a roller skate, substantially as herein-before described and as illustrated in the
accompanying Drawings.
Second. The pin p which serves the double purpose of an an axis upon which the
top plate oscillates, and also upon which the carriage revolves, substantially as
borein before described and as illustrated in the accompanying Drawings.
Third. The portions of right and left handed screws fixed upon the carriage,

page_text: whereby the latter is caused to make a varying angle with the body of the skate
substantially as herein-before described, and as illustrated in the accompanying
Drawings.
In witness whereof, I, the said John Henry Palmer, have hereunto set my hand
and seal, this First day of July, in the year of our Lord One thousand
eight hundred and seventy-six.
Witness,
P. EMERY DAVIES,
Clerk to Mr. G. R. Holland,
Birmingham.
JOHN HENRY PALMER. (L.S.)