IMPROVEMENTS IN APPARATUS FOR INDICATING AND REGISTERING THE NUMBER OF REVOLUTIONS PERFORMED AND DISTANCES TRAVERSED
Year: 1877

page_text: LETTERS PATENT to James Coulthred Thompson, of Ealing, in the County of
Middlesex, Gentleman, for the Invention of "IMPROVEMENTS IN APPARATUS
FOR INDICATING AND REGISTERING THE NUMBER OF REVOLUTIONS PERFORMED
AND DISTANCES TRAVERSED."
Sealed the 13th July 1877, and dated the 21st March 1877.
PROVISIONAL SPECIFICATION left by the said James Coulthred Thompson
at the Office of the Commissioners of Patents on the 21st March 1877.
JAMES COULTHRED THOMPSON, of Ealing, in the County of Middlesex, Gentleman.
"IMPROVEMENTS IN APPARATUS FOR INDICATING AND RESISTERING THE NUMBER
OF REVOLUTIONS PERFORMED AND DISTANCES TRAVERSED."
My Invention has for its object the adaptation and application to bicycles and
other vehicles and machines of apparatus capable of working automatically with
the moving parts without intermediate apparatus, and accurately indicating and
registering the number of revolutions of wheels, and the distance traversed by
vehicles.
And my Invention consists in fixing to the wheel of a bicycle or other vehicle,
or to any convenient revolving part of a machine, a case containing a set or series
of ordinary counting wheels and corresponding dials, and also a central toothed
pinion or wheel gearing with the wheel on the axis of the unit dial, which central
pinion or wheel is weighted, as required, in order to prevent its turning. By this
arrangement, as the said case is carried round by the revolution of the wheel or
other moving part to which it is applied, the said wheel on the axis of the unit dial
gearing with the stationary central pinion or wheel will be caused to turn on its
axis, and indicate on the dial each revolution, and will also transmit the indications
through the other wheels and dials in the ordinary manner.
In some cases it may be preferable to fix the central pinion or wheel to the
revolving part of a machine, and to weight the case so as to prevent it from turning,
thereby producing the same automatic working of the apparatus as before. Or a
similar effect may be produced by employing a ratchet wheel on a pinion gearing
D

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Coulthred Thompson in the Great Seal Patent Office on the
21st September 1877.
JAMES COULTHRED THOMPSON, of Ealing, in the County of Middlesex, Gentleman.
"IMPROVEMENTS IN APPARATUS FOR INDICATING AND REGISTERING THE NUMBER
OF REVOLUTIONS PERFORMED AND DISTANCES TRAVERSED."
My Invention of "Improvements in Apparatus for Indicating and Registering
the Number of Revolutions Performed and Distances Traversed" has for its object
the adaptation and application to bicycles and other vehicles and machines of
apparatus capable of working automatically with the moving parts thereof without
intermediate apparatus, and accurately indicating and registering the number of
revolutions of wheels and the distance traversed by vehicles.
And my Invention consists in fixing to the wheel of a bicycle or other vehicle,
or to any convenient revolving part of a machine, a case containing a set or series
of ordinary counting wheels and corresponding dials, and also a central toothed
pinion or wheel gearing with the wheel on the axis of the unit dial, which central
pinion or wheel is weighted, as required, in order to prevent its turning. By this
arrangement, as the said case is carried round by the revolution of the wheel or
other moving part to which it is applied, the said wheel on the axis of the unit
dial gearing with the stationary central pinion or wheel will be caused to turn on
its axis, and indicate on the dial each revolution, and will also transmit the
indications through the other wheels and dials in the ordinary manner.
In some cases it may be preferable to fix the central pinion or wheel to the
revolving part of a machine, and to weight the body of the apparatus, so as to
prevent it from turning, thereby producing the same automatic working of the
apparatus as before. Or a similar effect may be produced by employing a ratchet
wheel on a pinion gearing with the unit wheel, such ratchet wheel being acted
upon, as required, by a weighted arm pivotted to the case and carried round
therewith.
Having thus stated the nature of the said Invention, I will proceed to describe
more particularly in what manner the same is to be performed by the aid of the
accompanying Drawings, in which are represented two forms of the registering
apparatus above referred to.

page_text: axis, and through the pinion E give motion to the wheel F on the axis of the unit
dial G, on which such revolution will be registered. Then this movement of the
wheel F will be transmitted through the pinion on its axis to the wheel in gear
therewith on the axis of the tens' dial I, and thence in like manner to the wheels
on the axes of the hundreds' dial K, and the thousands' dial L respectively. It is
obvious that the indications to be shown on the dial, and also the gearing, may be
varied as required.
Figs. 4 and 5 represent an indicator in which the central pinion C is supposed to be
fixed so as to partake of the motion of the revolving wheel of a carriage or
revolving part of a machine, and the plates A and B, or body carrying the
gearing weighted so as to prevent the body from turning by means of a suitable
weight (shown by a dotted line in the Figure), applied to the lower part thereof.
By this arrangement the revolution of the pinion C with the wheel or re-
volving part of the carriage or machine will transmit motion through the train of
gearing, and register the revolutions in the same manner as above described, while
the body is kept stationary by means of the weight applied to it.
In both the above described arrangements the automatic working of the apparatus
is the same, being caused by the turning of a wheel connected with ordinary counting
wheels and dials in gear with a central pinion, combined with a stationary suspended
weight. And the mode of applying the stationary weight for the purpose might
bo further varied, as heroin-before referred to, but I prefer the modes represented
and described.
Having thus described the nature of the said Invention, and in what manner the
same is to be performed, I hereby declare that I do not claim as of my Invention
any of the above described parts of indicators separately considered, nor the use of a
weight for the purpose otherwise than when stationary and suspended as described,
but what I do claim is the apparatus as described, adapted to work automatically
and register revolutions in the manner described, when applied to the wheel or
revolving part of a vehicle or machine, by means of a central pinion and stationary
weight, in combination with a set or series of ordinary counting wheels and dials,
as herein-before described.
In witness whereof, I, the said James Coulthred Thompson, have hereunto
set my hand and seal, the Seventeenth day of September, in the year of our
Lord One thousand eight hundred and seventy-seven.
Witness,
WILLIAM SPENCE,
8, Quality Court,
Chancery Lane.
J. C. THOMPSON. (L.S.)