NEW Two-WHEELED SKATES
Year: 1875

page_text: LETTERS PATENT to Amherst Danicl-Tyssen, of 40, Chancery Lane,
London, Barrister, for the Invention of "NEW Two-WHEELED SKATES."
Scaled the 12th April 1876, and dated the 27th October 1875.
PROVISIONAL SPECIFICATION left by the said Amherst Daniel-Tyssen
at the Office of the Commissioners of Patents, with his Petition,
on the 27th October 1875.
I, AMHERST DANIEL-TYSSEN, of 40, Chancery Lane, London, Barrister,
do hereby declare the nature of the said Invention for "New Two-
WHEELED SKATES," to be as follows:-
I fix a castor at each extremity of the sole of the skate, and turn the
castors towards each other. I place a catch to prevent the castors from
being turned through more than a small angle from the direct line, but
allow them sufficient play to enable the skate to make a small circle on
either the inside or outside edge. I lengthen the frames in which the
wheels of the castors turn, and connect them by two coiled wire bell
springs or other tension springs crossing cach other, so that each as it

page_text: moves on one side pulls the other in the same direction, while the springs
also regulate the motion of the wheels and restore them to the direct
line, when all pressure is removed.
its centre.
The skate may be improved by adding two metal tongues to the
castor cases, overlapping each other, each having a longitudinal slit in
A horizontal piece of metal should then be let down from
the middle of the sole with a transverse slit in it of the same breadth,
and a nut being passed through the slits in the tongues and the slit in
the transverse bar would ensure that the two wheels should always be
turned through the same angle.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Amherst Daniel-Tyssen in the Great Seal Patent
Office on the 25th April 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, AMHERST
DANIEL-TYSSEN, of 40, Chancery Lane, London, Barrister, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-seventh day of October, in the
year of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Amherst Daniel-Tyssen, Her
special licence, that I, the said Amherst Daniel-Tyssen, my executors,
administrators, and assigns, or such others as I, the said Amherst
Daniel-Tyssen, my executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully
might make, use, exercise, and vend, within the United Kingdom of
Great Britain and Ireland, the Channel Islands, and Isle of Man, an
Invention for "NEW Two-WHEELED SKATES," upon the condition (amongst
others) that I, the said Amherst Daniel-Tyssen, my executors or admini-
strators, by an instrument in writing under my, or their, or one of their
hands and seals, should particularly describe and ascertain the nature
of the said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within

page_text: six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Amherst Daniel-Tyssen, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement, that is to say :-
The skate is made with a footboard and straps similar to those
ordinarily used for roller skates. On the under side of the footboard a
castor is fixed at each end of the skate, and the two castors are turned
towards each other, and a catch is arranged by means of screws or nobs
in the castor plate or otherwise, to prevent cither castor from turning
through a greater angle than twenty degrees or thereabouts on either
side of the line joining the centres of the two castors. The cases of the
two castors are united by two tension springs crossing each other, or
otherwise regulated by springs in manner herein-after mentioned, and
that portion of the castor case which encloses the castor pin is fitted
with two projecting horizontal wings, the outer surfaces of which are
the arcs of circles having the centre of the castor pin for a centre, and
for the purpose of attaining the intended simultaneous action of the
castors wires are attached from the right and left wings of the hind
castor to the left and right wings of the front castor respectively, so as
to wind and unwind on the arcs as the castors move.
The skate is a two-wheeled skate, one wheel being fitted in each castor
in the usual manner.
The castor plate and castor pin arc such as arc ordinarily used in
castors, and the castor case should be fixed on to the pin by a screw, as
is usual in castors where it is desired to have a power of easily removing
the castor case for the sake of cleaning it.
The wheels, the axle, and the mode of fastening in the axle are similar
to those of ordinary roller skates, the axle being readily removable to put
on new wheels.
The castor case differs from an ordinary castor case in two par-
ticulars,-
First. Its sides are prolonged to the front of the wheels, where they
are joined by a transverse bar and fitted with projections to receive the
springs.
Secondly. They are fitted with the wings before mentioned.

page_text: The position of the wheel admits of considerable variation, but its
centre must of course fall on the inside of the axis of the castor pin, that
is to say, towards the middle of the skate, and for skates with wheels
half an inch in thickness a horizontal distance of three-eighths of an
inch from the centre of the wheel to the line of the axis of the castor
pin is I believe the most suitable distance.
It is necessary to furnish the castor cases with a spring or springs to
regulate their action and bring them back to the central line of the
skate when pressure is removed. This may be done by parallel or
transverse tension springs connecting the two castors, or by separate 1
india-rubber buffers for the two castors to work against, or by combining
all or two of these methods.
What I claim is, the sole right to make a skate on castors, by which
a curve can be made through the castors being turned towards each
other, and having their action regulated by cross springs and ties or 1
other mechanical contrivance.
In witness whereof, I, the said Amherst Daniel-Tyssen, have here-
unto set my hand and seal, this 25th day of April, in the year of
Tn 1974