An Improved Cyclometer and Counting Apparatus.
Year: 1892

page_text: Date of Application, 6th Apr., 1892
Complete Specification Left, 3rd Jan., 1893-Accepted, 18th Feb., 1893
PROVISIONAL SPECIFICATION.
An Improved Cyclometer and Counting Apparatus.
I ARTHUR ANDERSON WATKINS of Bala Lodge Vanbrugh Park Blackheath
in the County of Kent, Engineer, do hereby declare the nature of this invention to
be as follows:-
My invention relates to improvements in cyclometers, odometers, speed indicators,
and the like instruments which have revolving hands or dials for the counting or
recording of distances or numbers; and is particularly applicable where compactness
or simplicity of construction is essential.
My invention consists of a circular revolving dial plate having ratchet shaped
teeth on its edge, and which plate is driven by a paul or catch engaging in the
teeth of the wheel and driving it in. the ordinary manner.
On this dial rests a hand or pointer revolving concentrically & carried round
with the dial but free to move on it independantly. An arm from the pointer or a
continuation of the same on the opposite side of the dial, reaches to & coincides
with the edge of the teeth of the dial & is made at that part of a width equal to a
certain number of teeth; in the case I shall describe, equal in width to 5 teeth.
This space is cut into 4 teeth, and these teeth are actuated by the same paul or
catch which drives the dial & are driven in the same manner. When the teeth of
the arm of the pointer are not engaged by the paul, the dial carries the pointer
round with it; and the paul will while driving the 5 teeth of the dial (over which
the arm of the pointer happens to be), also engage in the 4 teeth of the arm, and as
their pitch is greater than that of the teeth of the dial, will (at each of the four
strokes the paul here takes) first drive the arm a distance equal to the difference of
the pitch of one of its teeth to the pitch of one of the teeth of the dial, & then
coming in contact with the tooth of the dial drive both the arm and dial together
for the remainder of the stroke of the paul and so on for each of the four strokes
which engage in the teeth of the arm, till the arm is clear of the paul; after which
the paul will drive the dial only till the dial (which carries the hand round with it)
has brought the arm in contact with the paul again.
It will now be seen that once upon every revolution of the wheel, the paul will
also come in contact with the arm of the pointer and that the pointer will be moved
upon the face of the dial a distance equal to one of the teeth of the dial.
Now if the dial has 100 teeth and is marked out to 100 divisions, the zero on the
dial will pass a fixed point once in every 100 strokes. of the paul, and the pointer
will move one division on the dial at every revolution of the dial.
By this means therefore. of simply one wheel & a pointer, 10,000 strokes of the
paul can be registered.
The paul can be driven by cam, eccentric, crank or any such mechanism, to be
the means of registering strokes, revolutions, or reciprocating movements, and
can be at the end of a chain of wheels or otherwise for the dial to register units or
multiples.
Dated this 6th day of April 1892.
ARTHUR A. WATKINS.

page_text: COMPLETE SPECIFICATION.
An Improved Cyclometer and Counting Apparatus!
I ARTHUR ANDERSON WATKINS of Bala Lodge Vanbrugh Park Blackheath
in the County of Kent 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:-
"
JL
7.
11
My invention consists of a circular revolving dial plate having teeth on its edge,
which plate is driven by a paul or catch or other device engaging in the teeth of
the dial wheel and driving it in the ordinary manner. On the dial rest's a hand or
pointer revolving concentrically and carried round with the dial but free to move
on it independantly. An arm from the pointer or a continuation of the same on
the opposite side of the centre, reaches to and coincides with the teeth of the dial
and is made at that part of a width equal to a certain number of teeth. In the
case I shall describe equal in width to five teeth. This space is cut into four teeth
and these teeth are actuated by the same paul or other device which drives the
dial, & are driven in the same manner. When the teeth of the arm of the pointer
are not engaged in the paul the dial carries the pointer round with it and the paul
will while driving the five teeth of the dial (over which the arm of the pointer
happens to be) also engage in the four teeth of the arm, and as their pitch is
greater than that of the teeth of the dial, will (at each of the four strokes the paul
here takes) first drive the arm a distance equal to the difference of the pitch of one
of its teeth to the pitch of one of the teeth of the dial, and then coming in contact
with the tooth of the dial drive both the arm & the dial together for the
remainder of the stroke of the paul, and so on for each of the four strokes, which
engage in the teeth of the arm, till the arm is clear of the paul; after which the
paul will drive the dial only till the dial which carries the hand round with it has
brought the arm in contact with the paul again. It will now be seen that once
upon every revolution of the wheel, the paul will also come in contact with the arm
of the pointer and that the pointer will be moved on the face of the dial a distance
equal to one of the teeth of the dial. Now if the dial has 100 teeth & is marked
out to 100 divisions, the zero on the dial will' pass a fixed point once in every
100 strokes of the paul, and' the pointer will move one division on the dial at every
revolution of the dial. By this means therefore of simply one wheel & a pointer
10,000 strokes of the paul can be registered. The paul can be driven by cam,
eccentric, crank, or any such mechanism to cause it to be the means of registering
strokes or revolutions, and can be at the end of a chain of wheels or otherwise, for
the dial to indicate units or multiples..
I will now more particularly describe my invention by reference to the drawing.
A is a plate or dial the edge of which is cut in teeth all round. C'is a pointer
or hand resting on the dial (or held on the dial' by a slight frictional grip at the
centre K) this pointer C has an arm or continuation D. The eiid of B is of the
width of 5 teeth of the dial but is cut into 4 teeth only: E is the paul which drives
the dial and has a reciprocating stroke a. e. This paul may be driven by a cam, or
entric or any similar mechanism. As it moves from the position in which it is
shewn, it first comes in contact with the edge f of a tooth in the arm D and pushes
it a distance f. g. and then pushes the dial together with the hand to the 'end of its
stroke toe. The stroke is repeated; and in like manner the paul engages in all
the 4 teeth of D; at the last stroke having brought the edge h of D coincident
with the next tooth of the dial j. The pointer now will have moved to m and the
arm & pointer being carried round with the dial on which it rests will not record
another revolution till the teeth of D engage again with the paul.
Over the revolving dial A I place a second fixed dial or rim B. This rim is
divided into as many divisions as the dial A has teeth and it will be readily under-
stood that the pointer moves a distance equal to one of these divisions at each

page_text: stroke of the paul thus registering units of strokes. And if the dial has 100 teeth,
a revolution would register 100 movements of the paul, and the pointer passing a
division on the dial A once at each revolution would indicate the number of
hundreds of strokes the paul made.
To use this instrument for a bicycle cyclometer I cause the paul to be driven
by one of the bicycle wheels and so arrange it that the pointer carried by
the dial A revolves once in the number of revolutions of the bicycle wheel necessary
to cover a mile.
Having now fully described my invention I claim
The combination of ratchet wheel dial A. and hand C with arm D made and
actuated as herein described.
Dated this 2nd day of January 1902-
ARTHUR A. WATKINS.