Improvements in Apparatus for use with Motor-Carriages, Cycles, and other Vehicles, for Indicating when a Predetermined Speed has been Attained.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Apparatus for use with Motor-Carriages, Cycles,
and other Vehicles, for Indicating when a Predetermined
Speed has been Attained.
I, JOHN CLEMENTS, of 360, Cold Harbour Lane, Brixton, in the County of London,
Agent, do hereby declare the nature of this invention to be as follows:-
This invention relates to further improvements in the apparatus for use with
motor-carriages, cycles and other vehicles described in the Specification of my former
Patent No. 11022 of 1896 whereby an audible signal is given when the said carriages,
cycles or other vehicles attain a predetermined speed.
In employing the arrangement described in iny former specification wherein an
arm or arms having hammers is or are pivoted to a spindle rotated by the motion of
the carriage or other vehicle, I have found that on rough or bad roads the arm or
arms carrying the hammer or hammers is or are liable to be caused to strike the bell
before the predetermined speed has been attained.
Now the object of my present invention is to obviate this objection and to this
end instead of pivoting each arm carrying the hammer to the spindle I now attach
it thereto in such manner that it cannot move in a vertical plane and I attach
the hammer to a spring embracing the arm which may, if desired, slide in the
spindle, the spring normally keeping the hammer free of the bell. until the
predetermined speed has been attained when the elasticity of the spring is overcome
by the centrifugal force so as to bring the hammer in contact with the bell as
it revolves.
In that arrangement described in my said former specification wherein slotted
hammers are employed which slide on studs secured to a disc attached to the upper
end of the spindle, instead of connecting the hammers to the studs by springs I now
connect the two hammers by a single spring.
COMPLETE SPECIFICATION.
Improvements in Apparatus for use with Motor-Carriages, Cycles,
and other Vehicles, for Indicating when a Predetermined
Speed has been Attained.
I, JOHN CLEMENTS, of 360, Cold Harbour Lane, Brixton, in the County of
London, Agent, do hereby declare the nature of this invention and in what
[Price 8d1

page_text: manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention relates to improvements in the apparatus for use with motor-carriages,
cycles and other vehicles described in the Specification of my Patent No. 11022 of
1896 whereby an audible signal is given when the said carriages, cycles and other
vehicles attain a predetermined speed, the improvements having for their object to
simplify the construction and reduce the cost of such apparatus.
According to my present invention instead of pivoting one or more arms carrying
the hammer or hammers to the spindle I now attach an arm thereto in such a manner
that it can only move radially and I attach the hammer to a spring, embracing the
arm, which may, if desired, slide in the spindle, the spring normally keeping the
hammer free of the bell until the predetermined speed has been attained when.
the elasticity of the spring is overcome by the centrifugal force so as to bring the
hammer in contact with the bell as it revolves.
Or the arm is rigidly secured to the spindle and has pivoted to its outer end
an arm carrying the hammer, the said pivoted arm. being normally held out of
contact with the bell by a spring which connects it with the rigid arm or driving
spindle the said spring being of such strength that it is overcome by the
centrifugal force of the hammer when a predetermined speed has been attained.
In the accompanying drawing:-
Figure 1 is a sectional elevation of an audible signal apparatus made according
to my invention :
Figure 2 is a vertical section at right angles to Figure 1 and shewing the
apparatus applied to a cycle wheel; and,
Figure 3 is a view similar to Figure 1 of the modified construction of my improved
apparatus.
a is the bell secured by means of a screw 6 to a support c having a slot d at
its upper end which fits over the screw-threaded end of the axle e of the cycle
wheel and is adapted to be secured thereon by a nut f which is screwed upon the
end of the said axle e. The bell a for the purpose hereinafter described is
advantageously mounted eccentrically on the support c.
g is the spindle which is rotatably mounted in a pivot on the inner end of the.
screw band in the end of the support c as clearly shewn in Figure 2, the said
spindle being rotated from the hub h of the wheel by means of the toothed wheel i
which is screwed thereon and the toothed wheel j with which the said wheel i
gears and which is keyed upon the spindle g.
k is the arm which is rigidly fixed to the rotatable spindle g and is the hammer
which is adapted to slide upon the said arm and is normally held out of contact
with the bell a as it (the hammer) rotates by means of the spring m which is coiled
around the arm k and attached at one end to the hammer and at the other end to
the spindle g. The arm is provided at its outer end with a button ¹ which
prevents the hammer leaving the arm by coming into contact with the inner end of
the said hammer, the hole n in the inner end of the hammer through which the
arm passes being made conical, as shewn, so that the hammer is allowed a certain
amount of lateral movement on the arm k.
With this construction of apparatus it will be obvious, as above described, that
when the cycle wheel is rotating its motion will be communicated through the
toothed wheels i and j to the spindle g which thereby causes the hammer to rotate
inside the bell and tends to swing the said hammer outwards by the centrifugal
force imparted to it This centrifugal force, however, is counteracted by the tension
of the spring m until the wheel rotates with a certain predetermined velocity when
the centrifugal force overcomes the inward pull of the spring m upon the hammer
and causes the said hammer to strike the bell a thus giving notice that the
predetermined speed has been attained.
In the modification of my invention illustrated in Figure 3 the hammer does
not slide upon the rigid arm k but is fixed to the arm o which is pivoted to the

page_text: outer end of the arm k and the spring m instead of being coiled around the arm k is
connected at one end to the arm o and at the other end to the spindle g as clearly
shewn. It will be obvious, however, that the action of this modified form of
apparatus is precisely similar to that of the apparatus herein before described.
The bell a is in both constructions provided with a projection a¹ against which
the hammer can strike and the said bell is mounted eccentrically to the spindle g
so that, by turning the bell the distance of the projection a¹ from the centre of the
spindle can be altered for finally adjusting the apparatus.
As above stated the arm k can be arranged to slide in the spindle g and in this
case the hammer can be rigidly secured to the said arm and it will be obvious that
I can employ two or more centrifugal arms and hammers instead of one only as
illustrated.
Although I have shewn the spindle g horizontal and the arm k arranged to rotate
in a vertical plane, it will be obvious that the spindle can be arranged vertically as
described in the Specification of iny Patent No. 11022 of 1896 so that the arm rotates
in a horizontal plane.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The improved apparatus for use in motor-carriages, cycles and other vehicles
for indicating when a predetermined speed has been attained, such apparatus
consisting of a bell (a) adapted to be suspended by a suitable support (c) to an axle
on the carriage or the like, of a spindle (g) mounted in the bell and support and
adapted to be rotated by gearing (i, j) and of an arm (k) rigidly fixed to the
rotatable spindle (g) and having at its free end a hammer (1) normally held out of
contact with the bell as it revolves by a spring (m).
2. The improved apparatus for use in motor-carriages, cycles and other vehicles
for indicating when a predetermined speed has been attained, such apparatus
consisting of a bell (a) adapted to be suspended by a suitable support (c) to an axle
on the carriage or the like, of a spindle (g) mounted in the bell and support and
adapted to be rotated by gearing (i, 1) of an arm k rigidly fixed to the rotatable
spindle (g) of an arm (o) pivoted to the free end of the said arm (k) and having a
hammer () and of a spring (m) connected at one end to the arm (o) and at the
other end to the spindle (g) for normally holding the hammer (1) out of contact
with the bell when the spindle is rotating under the predetermined speed.
3. In apparatus of the kind described in Claims 1 and 2 mounting the bell a
eccentrically to the spindle y so that the distance of a projection a¹ in the bell
can be altered to adjust the apparatus.
Dated the 10th
1007
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.