Improved Cyclometer.
Year: 1893

page_text: The decision of the Chief Examiner, acting on behalf of the Comptroller, of the
27th day of September 1895, allowed, under Section 18 of the Patents, &c.
Act, 1883, an Amendment of this Specification.
Date of Application, 18th Sept., 1893
Complete Specification Left, 14th Apr., 1894-Accepted, 25th May, 1894
Improved Cyclometer.
I, GEORGE ERNEST DELL, of Watlington, in the County of Oxon, Watchmaker
and Jeweller, do hereby declare the nature of this invention to be as follows:-
My invention has for its object an Improved Cyclometer, especially applicable to
safety bicycles, so arranged that it may be secured to the axle of, and actuated
directly by a projection from one of the wheels of a cycle, or other vehicle.
In the practical.construction of my cyclometer I use a circular case preferably of
metal, provided with a suitable cap or cover in which a glass is secured. Fastened
in the case by screws is a plate upon which the dial is secured directly under the
glass cover.
Passing through the centre of the dial and extending vertically down to the
bottom of the case is the main arbor upon which is fitted a worm-wheel in gear.with a
worm cut or formed upon a spindle mounted in bearings at one side of the case, and
one end of which, projecting through the case, carries a star-wheel.
Free to turn upon the main arbor, and situated above the worm-wheel is a tooth-
wheel, the centre of which projects in the form of a tube through the dial. A
second tooth-wheel of equal size is secured to the dial plate. From the upper face
of the said worm-wheel projects a pin ou which is loosely mounted a small pinion ip
gear at once with both tooth-wheels before mentioned, so that owing to the difference
of the number of teeth on these wheels the second one is revolved a distance.equal
to the difference in the number of teeth at each revolution of the larger worm-
wheel.
Indexes or hands are secured friction-tight upon the outer end of the short tube
of the loose tooth-wheel,aud the main arbor of the worm-wheel. Also passing
through the dial is a second arbor carrying upon its upper end an index or hand,
and on its lower, a star-wheel, which shall be actuated by a projection from the
tube of the loose tooth-wheel before mentioned, so that, in every revolution .of
the tooth-wheel, the star-wheel shall be moved a distance corresponding to one,ray
.or leaf.
The whole device is, secured to the axle on one of the wheels of the cycle or other
vehicle, so that a projection from one of the spokes or hub thereof operates the
star-wheel on the end of the worm spindle operating the large worm-wheel, by the
aid of an oblong plate in one end, of which is formed an opening to allow it to he
secured to the axle.
To the opposite end of the said oblong plate is secured a short rod of circular
section, upon which slides a boss projecting from the case before mentioned. The,

page_text: said boss has a set screw by which it may be fastened in any position upon
the rod.
Dated this 16th day of September 1893.
CASTLE SMITH,
"Invention" Office, 54, Fleet Street, London, E.C.,
Agent for the Applicant.
GEORGE ERNEST DELL Watlington Tetsworth Oxfordshire Jeweller do hereby
declare the rature 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 improvements in cyclometers or instruments for measuring
the distance travelled by wheeled vehicles more especially velocipedles.
The objects of my improvements are to provide a cyclometer 1st simple in con-
struction 2nd so arranged and placed that it may be read by the rider of a velocipede
while riding:
I attain these objects by the mechanism hercin described and illustrated.
Fig. I is a plan of the cyclometer with the dial plate removed.
Fig. II is an elevation of the cyclometer with the front half of the case removed
showing the internal mechanism of the cyclometer and the piece by which it is
attached to a wheel.
Fig. 1 is a plan of the bottom of the dial plate showing the star wheel which
carries the small hand.
Fig. IV is an elevation of the piece by which the cyclometer is attached to a
wheel.
Similar letters relate to similar parts throughout the several views.
The cyclometer is formed of a shallow case Figs. and I having a top and
bottom. Pivotted in the centre of the bottom and coming through the centre
of the top of the case is the main arbor A. Fastened upon the arbor and
free to turn with it is, the worm wheel B. Projecting through the side
of the case is the tube C which retains in place but allows to revolve the
spindle F. The spindle has fastened upon its outer end the star wheel E
which is turned a distance of one tooth at every revolution of the velocipede
wheel by a projection from the wheel. Upon the other end of the spindle
is formed the screw or worm D which is so placed that it shall gear with the before
mentioned worm-wheel B causing it to revolve with its axle A, upon the upper end
of which is fastened friction tight the hand or pointer G. The toothed wheel I
laying centrally upon the worm-wheel B and free to turn upon the main arbor A
has a long tubular centre which passes up through the dial plate H and carries
friction tight upon its upper end the hand or pointer J. Fastened centrally below
the dial plate is the toothed wheel K. Pivotted loosely upon the wheel B and
carried by it is the pinion L (of any convenient number of teeth) in gear with the
two wheels I and K. The wheel K being fixed 1 is turned by the pinion La
certain part of a revolution corresponding to the difference in the number of teeth
in the two wheels I and K at every revolution of the wheel B. giving to the hands
a motion similar to the wheels to which they are attached namely B. and I. From
the tubular centre of wheel I under the dial plate projects the piece M Fig. III
which moves the star-wheel N one tooth at every revolution. The star-wheel N is
pivotted upon an arbor which turns with it and carries upon its upper end above
the dial plate the hand O Fig. II. The number of teeth of the star wheel N
correspond to the divisions upon the dial over which the hand turns.

page_text: The hands and dial of the cyclometer are protected by a glass fastened in a
suitable rim.
Upon the bottom of the cyclometer case is formed the projecting piece S having
through it a hole at T 1 Fig. II through which passes the pin T Fig. IV freely but,
is held in any desired position by a set screw. The pin T is firmly attached to the
piece U Figs. II and IV formed with a hole at V so as to pass over the axle of a
velocipede wheel and be secured by a nut.
Any other convenient mode of attaching the cyclometer to a vehicle may be used.
I claim for my invention
A erelometer-so constructed that it will work directly by a projection from a
releeipede wheel and yet-so-placed that it may be read by the rider without his
leaving the saddle.
2nd (1) A cyclometer so constructed that the main worm inside the cyclometer
case may be formed upon the same spindle that carries the star-wheel outside the case.
I claim here this particular construction not the use of worms, worm-wheels or star-
wheels.
3rd (2) In cyclometers, the use of a gathering pinion and toothed wheels to
give the relative motion to the hands or pointers, as hercin described.
4th. The manner herein described of attaching a exelometer-to a velocipe.de
wheel.
Dated this 13th now of Amuil 1001
GEO. E. DELL.