Year: 1894

page_text: Date of Application, 10th Jan., 1894
Complete Specification Left, 1st June, 1894-Accepted, 25th Aug., 1894
We JOHN ROTHERHAM, HUGH ROTHERHAM and KERITT ROTHERHAM all
of Coventry Watchmakers do hereby declare the nature of this invention to be as
follows:-
This invention relates to an improved cyclometer, and the object of our invention
is to provide means whereby a record may be made of the distance over which a
cycle or other wheeled carriage has travelled.
In carrying out our invention, we mount a spindle in a suitably constructed
frame or casing, one end of said spindle is provided with a suitable worm wheel
which receives its motion from a worm mounted in the frame. To one end of said
worm or its spindle, we attach a friction wheel, and the frame or casing which
carries the whole of the mechanism is attached to the fork or other convenient
part of a cycle or carriage in such a manner that the periphery of said friction
wheel is in contact with the periphery of one of the cycle or carriage wheels and is
rotated by frictional contact therewith.
To a suitable part of said worm wheel we attach a pin or stud, and immediately
over said worm wheel we provide a suitable plate, which is capable of receiving
reciprocating motion.
The said plate has attached to it two suitable cams or the like which are fixed
in such positions that on said worm wheel being revolved, the pin which is attached
to it engages alternately with each of said cams and thereby causes said plate to
reciprocate. Such reciprocating motion is transferred by means of a suitable
pawl, (which is also mounted on said plate) to a ratchet wheel and from thence by
means of suitable pinions and toothed wheels to a pointer or pointers which indicate
on a marked dial the distance travelled. Such train of wheels may be so arranged
that one of the pointers shall make a complete revolution for every mile travelled
whereas the other pointer may be arranged to revolve once in every hundred miles
or in any other desired proportion.
Dated this 9th of L 1201
HORN & SON,
Applicants' Agents.
We, JOHN ROTHERHAM, HUGH ROTHERHAM and KERITT ROTHERHAM of
Coventry, Watchmakers, 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 :-
This invention relates to an improved cyclometer and the object of our invention
is to provide means whereby a record may be made of the distance over which a
cycle or other wheeled carriage has travelled.
In the accompanying drawings
Figure 1, represents a sectional side elevation of our invention.
Figure 2, represents a plan view of our invention, the gear wheels being

page_text: Figure 3, represents a bottom plan view of the plate J with the attached
mechanism.
Figure 4, represents alternative means for reducing the speed of parts so as to
indicate a hundred or more miles.
In carrying out our invention we construct a suitable case A which is provided
with bearings B adapted to carry a worm C. To the outer end of said worm C or
its spindle we attach a friction wheel D which is adapted to be revolved by means
of the frictional contact of its periphery with the periphery of a rotating cycle or
carriage wheel; the casing being also provided with a suitably jointed arm E
and clamp or the like F so that the whole may be attached to the fork or other
convenient part of a cycle or carriage. On a suitably supported spindle G we
mount a worm wheel H adapted to be driven by the worm C, and to a convenient
part of the said worm wheel H we attach a pin or stud I. A plate J which is
fixed above the worm-wheel H to the frame A, is provided on its under side with a
pawl plate K which is capable of being moved backward and forward a certain
distance, being formed for this purpose with apertures L L¹ sliding on pins M M'
fixed to the plate J. Said pawl plate K is also provided with cam pins N N¹
with which the pin or stud I on the worm wheel H alternately engages when
said worm wheel is in motion, thereby pushing said pawl plate backward and
forward. For the purpose of transmitting this intermittent motion of the pawi
plate K, we affix to it a pawl O which engages with the teeth of a ratchet wheel P
so that at each double movement of the pawl plate K the ratchet wheel P will be
revolved through the space of one tooth; the return of said ratchet wheel P being
prevented by means of a pawl Q which is fixed to the plate J. We prefer to
construct the different parts of such relative dimensions that the ratchet wheel P
makes one complete revolution for every mile travelled, said ratchet wheel being
provided with a spindle R and pointer S which indicates on a suitable dial the
fractions of a mile travelled, and for the purpose of indicating the number of miles
travelled, we provide a second pointer T which may receive its motion from the
spindle R by means of a suitable train of geared wheels in the usual manner, or
its motion may be caused by the following means-To the spindle R, we attach an
eccentric U which engages with the bifurcated end of a rocking lever V, the
opposite end of which rocking lever is provided with a pawl W which engages with
the teeth of a ratchet wheel X, the whole being so arranged that at each complete
revolution of the ratchet wheel P, the ratchet wheel X will be revolved through
the space of one tooth, so that if the said ratchet wheel X be formed with
100 teeth, it will make one complete revolution for every 100 miles travelled.
The return of the ratchet wheel X is prevented by means of a pawl Y which is
fixed to the plate J, and the pointer T is attached to the ratchet wheel ✗ so that
the distance travelled may be readily read off a properly marked dial Z, which i-
fixed to the upper portion of the case A.
It will be readily understood that a cyclometer constructed in accordance withi
our invention, may be geared in such a manner, or the different parts may be
constructed of such relative dimensions as to be capable of indicating either greater
or less distances than those herein referred to and also, that in the place of the
plain bearings B carrying the worm spindle we may provide ball bearings.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. In a cyclometer, a suitably supported friction wheel D in combination with
the mechanism hereinbefore described, said wheel D, being caused to revolve by
being put in contact with the periphery of a rotating cycle or carriage wheel, and
by means of which a record of the distance over which a cycle or carriage has
travelled may be made, substantially in the manner described and illustrated.
2. A cyclometer consisting of a case A adapted to carry a worm C to which is
attached a friction wheel D a worm wheel H mounted on a suitable spindle G and

page_text: provided with a stud 1, a pawl plate K provided with a pawl O and cam pins N N',
a ratchet wheel P, and pawl Q, all constructed, arranged and operating for the
purposes and substantially as set forth.
3. In a cyclometer provided with a friction wheel, worm and worm-wheel, the
combination of a pin I, pawl plate K, provided with a pawl O and cam pins N N¹
a ratchet wheel P and pawl Q, all constructed, arranged and operating for the
purposes and substantially as set forth.
4. In a cyclometer having a case A, worm C, worm wheel H, spindle G, stud
pawl plate K, provided with pawl O and cam pins N N¹, a ratchet wheel P
and pawl Qa ratchet wheel X adapted to be revolved a short distance at
each complete revolution of the ratchet wheel P by means of an eccentric U,
rocking lever V and pawls W and Y, all constructed, arranged and operating for
the purposes and substantially as set forth.
Dated this 18th day of June 1894.
HORN & SON,
Applicants' Agents.