Improvements in Wheels for Bicycles, Tricycles, and other Vehicles.
Year: 1893

page_text: Date of Application, 6th Feb., 1893
Complete Specification Left, 17th Mar., 1893-Accepted, 17th June, 1893
PROVISIONAL STECIFICATION.
Improvements in Wheels for Bicycles, Tricycles, and other
Vehicles.
I TIMOTHY MURPHY of Number 73 and 74 O'Connell Street Clonmel in the
County of Tipperary Agricultural Engineer do hereby declare the nature of this
invention to be as follows:-
The said improvements are the combination of two wheels one being smaller than
the other. The small wheel is placed within the circumference of, the large one as
per drawing Fig. 1. of which "E" thereon is the rim "B" the centre and "X" the
spokes of the large wheel. At any desired distance apart around the circumference
between the rim "M" of the inner wheel and the centre "B" of the outer wheel
are attached any desired number of spiral or other springs. The end of said spiral
springs next the centre "B" of outer wheel is connected directly or by links to said
centre of said outer wheel and the other end of said spiral springs is connected to
the rim "M" of the inner wheel either directly or by links. Said spiral springs
are attached in a direct line towards the centre of inner wheel or they may be
attached obliquely or in a line away from the centre of said inner wheel and as so
attached they will sustain the weight of said inner wheel. The said spokes "X"
of outer wheel move freely in bushings and said bushings are free to move in slits
formed at "L" in rim of inner wheel. Said bushings are provided with cushions
made of rubber or other noiseless substance and said spiral springs may be coated
with rubber or other noiseless substance so that the movement of said wheel may
be noiseless. Said inner wheel is prevented from revolving around in the outer
wheel by means of any desired number of spiral springs as shewn at "N"
and "O" Fig. 1. one end of said springs is attached either directly or by links at
any suitable distance around the inner circumference of rim of said outer wheel as
shewn at "d" Fig. 1. and the other end to the outer circumference of rim of inner
wheel as shewn at "A" Fig. 1. Said spiral springs when placed in this position
face each other and cause the inner wheel to incline forward towards the forward
part of rim of outer wheel whereby the inner wheel maintains a more or less
eccentric position in the outer wheel in the direction in which it moves and as the
weight of the rider or load rests upon the inner wheel is in advance of the
centre "B" of outer wheel the weight of said rider or load will have a tendency
to move it forward with increased speed. Said spiral springs "N" and "O" will
also bear the weight of the inner wheel towards the outer wheel and said spiral
spring "N" may be of less strength than the said spiral spring "O." The
arrow "H" Fig. 1. shews the direction in which the wheel rolls. At drawing Fig. 2.
is shewn a cross section of a pneumatic tyre rim. Said rim is in three separate
rings. "A" is the central rim or ring to which the spokes are attached and upon
which the tyre "B" rests. "H" is the cover for said tyre upon which there is a
flange formed at "N. N." Said flanges fit against the flanges formed on the rim "A"
at "H H." "SS" are the two rings which forms the other part of said rim and
said rings are made to press said cover all around against the said rim "A." by
means of spiral springs "P" the hooks of which are made to grip the flanges "0.0"
formed on said rings "SS." Said spiral springs are attached at any desired
distance around the circumference of said rings.
Dated this 4th day of February 1893.

page_text: COMPLETE SPECIFICATION.
Improvements in Wheels for Bicycles, Tricycles, and other
Vehicles.
I TIMOTHY MURPHY of Number 73 and 74 O'Connell Street Clonmel in the
County of Tipperary Agricultural 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 :-
The said improvements are the combination of two wheels one being smaller than
the other. The small wheel is placed within the circumference of the large one as
per drawing Fig. 1. left with Provisional Specification which we now adopt, of
which "E" thereon is the rim, "B" the centre and "X" the spokes of the large
wheel. At any desired distance apart around the circumference between the
rim "M" of the inner wheel and the centre "B" of the outer wheel are attached
any desired number of spiral or other springs. The end of said spiral springs next
the centre "B" of outer wheel is connected directly or by links to said centre of
said outer wheel and the other end of said spiral springs is connected to the
rim "M" of the inner wheel either directly or by links. Said spiral springs are
attached in a direct line towards the centre of inner wheel or they may be attached
obliquely or in a line away from the centre of said inner wheel and as so attached
they will sustain the weight of said inner wheel. The spokes "X" of outer wheel
may move freely in bushings and said bushings are free to move in slits formed
at "L" in rim of inner wheel. Said bushings are provided with cushions made of
rubber or other noiseless substance and said spiral springs may be coated with
rubber or other noiseless substance so that the movement of said wheel may be
noiseless. Said inner wheel is prevented from revolving around in the outer wheel
by means of any desired number of spiral springs as shewn at "N." and "O" Fig. 1.
one end of said springs is attached either directly or by links at any suitable
distance around the inner circumference of rim of said outer wheel as shewn
at "Fig. 1. and the other end to the outer circumference of rim of inner wheel
as shewn at "A" Fig. 1. Said spiral springs when placed in this position face
each other and cause the inner wheel to incline forward towards the forward part
of rim of onter wheel whereby the inner wheel maintains a more or less eccentric
position in the outer wheel in the direction in which it moves and as the weight of
the rider or load rests upon the inner wheel is in advance of the centre" B" of
outer wheel the weight of said rider or load will have a tendency to move it forward
with increased speed. Said spiral springs "N" and "O" will also bear the weight
of the inner wheel towards the outer wheel and said spiral spring "N"
less strength than said spiral spring "O." The arrow H" Fig. 1. shews the
direction in which the wheel rolls. At drawing Fig. 2. accompanying the Complete
Specification is shewn a cross section of a pneumatic tyre rim. Said rim is in
three separate rings. "A" is the central rim or ring to which the spokes are
attached and upon which the tyre "B" rests. "H is the cover for said tyre
upon which there is a flange formed at "N. N." Said flanges fit against the flanges
formed on the rim "A
" at "H H." "SS" are the two rings which form the
other part of said rim and said rings are made to press said cover all around against
the said rim "A" by means of spiral springs "P" the hooks of which are made to
grip the flanges "0.0" formed on said rings "S S." At drawing Fig. 3. is shewn
another form of said pneumatic tyre cover and rim "d" is the rim to which the
spokes are attached." "I" is the cover upon which there is a flange formed
at "N. N." Said cover is pressed partly against the verges of said rim and partly
against the outer and inner circumference of said rim "d" at both sides of said rim
by the rings "F F." Said rings are pressed against said cover by means of spiral
springs ""which grip the verges of the rings "FF." or said rings may support
said cover against the pressure of the air tube at "A. A." t is the tyre which rest
CE
may be of

page_text: on said rim "d." The two rings "FF" can be provided with two sets of spiral
springs one set to each ring and which are attached to the rim "d" at one end
and the other ends to the said rings in which case one of said rings may remain
fixed.
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. The removing of said rings by the releasing of said spiral springs and then
the said cover can be removed with the hand.
2. The forming of flanges on said cover to grip the verges of said rings by which
the said cover prevented from slipping away from the said rings.
Dated this 15th day of March 1893.
TIMOTHY MURPHY.