Apparatus for Varying the Number of Revolutions Imparted to one Shaft from a Given Number of Revolutions of another Shaft.
Year: 1895

page_text: Date of Application, 14th Aug., 1895
Complete Specification Left, 14th May, 1896-Accepted, 20th June, 1896
PROVISIONAL SPECIFICATION.
Apparatus for Varying the Number of Revolutions Imparted to one
Shaft from a Given Number of Revolutions of another Shaft.
I, FRANK WRIGHT, of No. 21 Old Queen Street, Westminster, in the County
of London, Engineer, do hereby declare the nature of this invention to be as
follows:-
:―
In many apparatus especially of the kinds in which the introduction of a coin
causes, by means of coin freed mechanism, the delivery of a certain quantity of gas
or liquid, it is necessary to vary the relation of the movements of the coin freed
mechanism relatively to the delivery mechanism so as to suit variations in the
price of the gas or fluid delivered. If, for instance, a coin freed gas meter be
arranged so that for a coin, such as a penny, introduced, a certain number of cubic
feet are delivered when gas is at a certain price per cubic foot, obviously, when
the price of gas becomes greater or less per cubic foot, it is necessary so to vary
the movement of the coin freed mechanism relatively to that of the meter or its
counter, that the introduction of the coin will cause delivery of a less or greater
number of cubic feet.
My invention relates to means of varying relative movements of the kind above
referred to, as I shall describe referring to the accompanying drawings.
Fig. 1 is a side elevation of mechanism according to my invention,
Fig. 2 is a front view of one of a pair of discs forming part of the mechanism,
and Fig. 3 shews the two discs set in one of their possible positions.
A is part of the side of a chamber in which the coin freed mechanism is arranged,
a spindle B, which may be that of a counter, passing through A and extending into
a tubular spindle C which is the spindle that drives the coin freed mechanism.
The spindle B passes through a disc D which is fixed to the side A. D' is another
disc which can be turned round the boss of D and set in various positions by means
of a screw S.
Each of the discs has about half of its circumference cut to a circle of less radius
than the rest of its circumference, one of the extremities of the larger portion
terminating with a rounded slope.ut d.
On the spindle B is fixed an arm E on the end of which is pivotted. a rocking
pawl F urged by a spring f to take the position shewn in Fig. 1.
On the spindle C is fixed a toothed wheel H.
The disc D' being fixed in such a position relatively to the disc D that there is
a gap such as G Fig. 3 between the terminations of the larger parts of their
circumferences, then, while this gap is under one end of the rocking pawl F, the
other end of the pawl is kept by the spring f disengaged from the teeth of the
wheel H, and consequently while the pawl passes over the gap G the spindle B
does not drive C. But when the pawl comes to the end of the gap G, the incline d
raises the one end of it depressing the other end, and causing it to engage one of
the teeth of H, so that now the spindle C is made to revolve along with B until
the pawl again comes to the gap G when disengagement from H takes place.
When the disc D¹ is in such a position relatively to D that the two larger parts
of their circles coincide, then the pawl F being engaged with H during only half a
revolution, the spindle C makes only half as many revolutions as B in a given time.

page_text: When, on the other hand, the larger part of the circle of D¹ coincides with the
smaller part of D, then the pawl F beiug held in engagement with H during a
whole revolution, the spindle C makes the same number of revolutions as B. In
any intermediate relative position of the two discs the part of a revolution
communicated to C by each revolution of B is a fraction intermediate between
and 1.
According as the price of gas varies, so can the disc D¹ be set relatively to D so
that the spindle B imparts to C a greater number of revolutions in relation to its
owu motion when the price of gas is high and consequently renders necessary the
introduction of a greater number of coins to pay for a given delivery, and conversely,
when the price is low, the discs are set so that C makes a less number of revolutions,
consequently requiring fewer coins for a given delivery.
The method and apparatus for adjusting the coin freed mechanism to suit varying
prices of gas may obviously be applied to meters for liquids.
Also in apparatus of other kinds the number of relative revolutions of two shafts,
the one of which drives the other, may obviously be varied within certain limits by
mechanism of the kind described.
Dated this 14th day of August 1895.
ABEL & IMRAY,
Agents for the Applicant.
Apparatus for Varying the Number of Revolutions Imparted to one
Shaft from a Given Number of Revolutions of another Shaft.
I, FRANK WRIGHT, of No. 21 Old Queen Street, Westminster, in the County
of London, 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 :-
In many apparatus especially of the kinds in which the introduction of a coin
causes, by means of coin freed mechanism, the delivery of a certain quantity of gas
or liquid, it is necessary to vary the relation of the movements of the coin freed
mechanism relatively to the delivery mechanism so as to suit variations in the price
of the gas or fluid delivered. If, for instance, a coin freed gas meter be arranged
so that for a coin, such as a penny, introduced, a certain number of cubic feet are
delivered when gas is at a certain price per cubic foot; obviously, when the price
of gas becomes greater or less per cubic foot it is necessary so to vary the movement
of the coin freed mechanism relatively to that of the meter or its counter, that the
introduction of the coin will cause delivery of a less or greater number of cubic
feet.
My invention relates to means of varying relative movements of the kind above
referred to, as I shall describe referring to the drawings accompanying my
Provisional Specification.
Fig. 1 is a side elevation of mechanism according to my invention,
Fig. 2 is a front view of one of a pair of discs forming part of the mechanism,
and Fig. 3-shews the two discs set in one of their possible positions.
A is part of the side of 'a chamber in which the coin freed mechanism is arranged,
a spindle B, which may be that of a counter, passing through A and extending
into a tubular spindle which is the spindle that drives the coin freed mechanism.
The spindle B passes through a disc D which is fixed to the side A. D' is another
disc which can be turned round the boss of D and set in various positions by means
of a screw S.
Each of the discs has about half of its circumference cut to a circle of less radius

page_text: than rest of its circumference, one of the extremities of the larger portion terminating
with a rounded slope at d.
On the spindle B is fixed an arm E on the end of which is pivotted a rocking
pawl F urged by a spring f to take the position shewn in Fig. 1.
On the spindle C is fixed a toothed wheel H.
The disc D' being fixed in such a position relatively to the disc D that there is
a gap such as G Fig. 3, between the terminations of the larger parts of their
circumferences, then, while this gap is under one end of the rocking pawl F, the
other end of the pawl is kept by the spring f disengaged from the teeth of the
wheel H, and consequently while the pawl passes over the gap G the spindle B
does not drive C. But when the pawl comes to the end of the gap G, the incline d
raises the one end of it depressing the other end, and causing it to engage one of
the teeth of H, so that now the spindle C is made to revolve along with B until
the pawl again comes to the gap G when disengagement from H takes place.
When the disc D' is in such a position relatively to D that the two larger parts
of their circles coincide, then the pawl F being engaged with H during only half a
revolution, the spindle C makes only half as many revolutions as B in a given time.
When, on the other hand, the larger part of the circle of D₁ coincides with the
smaller part of D, then the pawl F being held in engagement with H during a
whole revolution, the spindle C makes the eaine number of revolutions as B. In
any intermediate relative position of the two discs the part of a revolution
communicated to C by each revolution of B is a fraction intermediate between
and 1.
According as the price of gas varies, so can the disc D¹ be set relatively to D so
that the spindle B imparts to C a greater number of revolutions in relation to its
own motion when the price of gas is high and consequently renders necessary the
introduction of a greater number of coins to pay for a given delivery, and conversely
when the price is low, the discs are set so that C makes a less number of revolutions,
consequently requiring fewer coins for a given delivery.
The method and apparatus for adjusting the coin freed mechanism to suit varying
prices of gas may obviously be applied to meters for liquids.
Also in apparatus of other kinds the number of relative revolutions of two shafts,
the one of which drives the other, may obviously be varied within certain limits by
mechanism of the kind described.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
Apparatus for varying the number of revolutions imparted to one shaft from a
given number of revolutions of another shaft, substantially as described with
reference to the accompanying drawings..
DL: LuL I
CM 1902
ABEL & IMRAY,
Agents for the Applicant.