AN IMPROVED ALARM BELL FOR WARNING FOOT PASSENGERS OF THE APPROACH OF BICYCLES, TRAM CARS, AND OTHER CARRIAGES
Year: 1877

page_text: LETTERS PATENT to Frederick Leonardt, of Birmingham, in the County of
Warwick, Merchant, for the Invention of "AN IMPROVED ALARM BELL FOR
WARNING FOOT PASSENGERS OF THE APPROACH OF BICYCLES, TRAM CARS,
AND OTHER CARRIAGES."
Sealed the 22nd March 1878, and dated the 27th September 1877.
PROVISIONAL SPECIFICATION left by the said Frederick Leonardt at the
Office of the Commissioners of Patents on the 27th September 1877.
FREDERICK LEONARDT, of Birmingham, in the County of Warwick, Merchant.
"AN IMPROVED ALARM BELL FOR WARNING FOOT PASSENGERS OF THE APPROACH
OF BICYCLES, TRAM CARS, AND OTHER CARRIAGES."
The object of this Invention is explained in the title.
I provide a suitable frame which has fitted within it a small roller or friction
pulley working upon a suitable axle, the ends of which pass through two sides of
the said frame. In one end of the said axle I insert a small stud, slightly off the
centre, so as to obtain a crank motion.
I next provide a suitable lever, which has at its lower end a hole inserted in it to
admit of a screw, which is for the purpose of securing it to the before-mentioned
Above the said
frame and to form a fulcrum upon which the lever works.
hole I provide a longitudinal alot within which the before-mentioned stud
works. At the top of the said lever is fitted a hammer, which is caused
to work inside a bell or gong which is fitted to the top of the said frame.
The said frame is affixed to the bicycle or other carriage by means of a spring hinge
which will admit of its being readily thrown into action, by so turning it that the
said roller shall come into contact with the wheel of the bicycle or other carriage, so
as to obtain the required motion, and it will be understood when the alarm is not
required to be used the friction roller can be withdrawn from the wheel by turning
it on the said spring hinge.

page_text: When the apparatus is in action the friction roller is turned at a great velocity by
reason of its being in contract with the bicycle or other carriage wheel; and the
before-mentioned stud working within the said slot in the lever causes the said
hammer to strike the bell or gong with great rapidity, and so give an effectual
alarm.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Frederick Leonardt in the Great Seal Patent Office on the 26th
March 1878.
[f
FREDERICK LEONARDT, of Birmingham, in the County of Warwick, Merchant.
AN IMPROVED ALARM BELL FOR WARNING FOOT PASSENGERS OF THE APPROACH
OF, BICYCLES, TRAM CARS, AND OTHER CARRIAGES."
The object of this Invention is explained in the title.
I provide a suitable frame which has fitted within it a small roller or friction
pulley working upon a suitable axle, the ends of which pass through two sides of
the said frame. In one end of the said axle I insert a small stud, slightly off the
centre, so as to obtain a crank motion.
I next provide a suitable lever, which has a hole inserted in it at its lower end
to admit of a screw, which is for the purpose of securing it to the before-mentioned
frame and to form a fulcrum upon which the lever works. Above the said hole I
provide a longitudinal slot, within which the before-mentioned stud works. At the
top of the said lever is fitted a hammer, which is caused to work inside a bell or
gong which is fitted to the top of the said frame. The said frame is affixed to the
bicycle or other carriage by means of a spring hinge which will admit of its being
_ readily thrown into action, by so turning it that the said roller shall come into
contact with the wheel of the bicycle or other carriage, so as to obtain the required
motion, and it will be understood when the alarm is not required to be used the
friction roller can be withdrawn from the wheel by turning it on the said spring
hinge.
-I
When the apparatus is in action the friction roller is turned at a great velocity by
reason of its being in contact with the bicycle or other carriage wheel; and the
before-mentioned stud working within the said slot in the lever causes the said
hammer to strike the bell or gong with great rapidity, and so give an effectual
alarm.
--
.:..
That my Invention may be better understood I have annexed Drawings thereof,
which I now proceed to describe.
In the Drawing Figure 1 is an elevation, and Figure 2 an inverted plan of an
improved alarm bell for bicycles made according to my Invention.
The same letters refer to the same parts in both Figures.
Fi
a is a frame having its end forked, in which is fitted a small roller or friction
pulley b working upon the axle c which passes through the two sides
: of the frame a. In one end of the axle c is inserted a small stud d. e is
a lever, secured at its lower end by a pin f, inserted into the snug g
formed on one side of the frame a, the pin ƒ therefore acting as a fulcrum

page_text: for the lever e to work upon.
In the lever e is formed a longitudinal slot h,
within which the stud d turned by the axle c works, and a crank motion is
thereby obtained. At the top of the lever e is fixed a hammer i which is mado
to work in the bell or gong k which is affixed to the frame a in any suitable
manner. The said frame a is affixed to the bicycle in the most convenient
manner, and by means of a spring hinge the apparatus may be thrown in or
out of gear at the will of the rider. When in gear the roller b is brought into
contact with the driving wheel 1, which as it revolves causes the roller b to revolve
too, and by means of the crank motion herein-before described, the hammer i is
caused to strike the bell or gong k with great rapidity, and an effectual alarm is
given.
Figure 3 is an elevation, and Figure 4 a plan of a modification of my Invention
when it is desired that the driving wheel of the bicycle shall drive the small wheel
of the alarm horizontally instead of vertically, as in Figure 1. In Figure 3 the gong
or bell m and the small wheel n are fixed to the frame o. attached to the spindle p
which passes through the handle of the bicycle q and is there secured in any suitable
manner. At one end of the frame o is fixed a pin r having at its upper end a small
spindle s on which is fitted loosely the hammer t, so that when the driving wheel u
revolves the revolutions imparted to the smaller wheel n, which is in contact with
it at its lower edge, the hammer t strikes rapidly against the bell or gong m. The
lower end of the spindle p is attached to the fork of the bicycle by the attachment w,
or in any other suitable manner. By means of the spring × pressed against the
handle g the apparatus may be thrown out of gear at pleasure.
Having now described the nature of my said Invention and the manner in
which the same is to be performed, I desire it to be understood that I do not limit
myself to the precise details herein-before described, and illustrated in the Drawings,
as they may to some extent be varied without departing from the nature of my said
Invention, but what I claim as the Invention to be protected by the herein-before
recited Letters Patent is, the construction of an alarm bell which shall be actuated
by a friction wheel, which said said friction wheel is caused to come in contact with
the wheel or wheels of a bicycle or other carriage, substantially as herein-before
described, and illustrated in the accompanying Drawings.
In witness whereof, I, the said Frederick Leonardt, have hereunto set my hand
and seal, this Twenty-third day of March, in the year of our Lord One
thousand eight hundred and seventy-eight.
Witness,
J. EMERY DAVIES,
Patent Office,
Birmingham.
FREDERICK LEONARDT. (L.S.)