IMPROVEMENTS IN MEANS OR .APPARATUS FOR REGULATING THE SPEED OF CLOCKWORK FOR TELEGRAPHIC AND OTHER PURPOSES
Year: 1877

page_text: LETTERS PATENT to John Matthias Augustus Strob, of Hampstead Road, in the
County of Middlesex, for the Invention of "IMPROVEMENTS IN MEANS OR
.APPARATUS FOR REGULATING THE SPEED OF CLOCKWORK FOR TELEGRAPHIC
AND OTHER PURPOSES."
aled the 24th April 1878, and dated the 6th November 1877.
PROVISIONAL SPECIFICATION left by the said John Matthias Augustus
Stroh at the Office of the Commissioners of Patents on the 6th November
1877.
JOHN MATTHIAS AUGUSTUS STROH, of Hampstead Road, in the County of
Middlesex. "IMPROVEMENTS IN MEANS OR APPARATUS FOR REGULATING THE
SPEED OF CLOCKWORK FOR TELEGRAPHIC AND OTHER PURPOSES."
The Invention has for its object improvements in means or apparatus for
regulating the speed of clockwork for telegraphic and other purposes, and is
applicable to cases where it is desirable to provide a means for varying at will and
instantaneously the speed of clockwork. For this purpose I employ one or more
cylinders and pistons working therein. These pistons are connected to and
operated by an arrangement of beams, connecting rods and levers, connected to and
set in motion by a crank or cranks rotated by the clockwork.
The pistons do not fit accurately, the cylinders, but a slight space is left between
them and the sides of the cylinders, so as to allow air gradually to pass from the one
side to the other of the pistons. The cylinders are open at one end and are closed
at the other, except that they are provided at such closed ends with apertures
capable of being more or less partially or entirely opened or closed by a suitable
valve or cover, which is capable of being operated by means of a lever so as to
admit a greater or less quantity of air to the cylinder through the valve, or to cut
off the supply of air entirely from the closed end thereof.
D

page_text: Suitable counterbalance weights are employed on the beams to counterbalance the
weight of the pistons.
The pistons being formed as above stated work without appreciable friction, as
the air passing from the one side to the other around the edges of the pistons keeps
the pistons central in the cylinders.
The speed of the clockwork is regulated by the extent to which the apertures in
the cylinders are opened or closed; thus when fully open a comparatively free
passage for air is provided in the bottoms of the cylinders, and thereby less
resistance is offered to the motion of the pistons, whilst more resistance is offered to
the motion of the pistons in proportion to the extent to which such apertures are
covered.
The Invention is more especially applicable to arrangements of clockwork
employed to feed forward the strip of paper in printing telegraphic apparatus, and
enables the speed of the clock work to be readily and instantaneously changed from
that suitable for the printing telegraph, when operated automatically, to that
suitable for the printing telegraph when operated by hand, and vice versa.
Another advantage of this arrangement is, that on starting the clockwork the
required speed is instantly obtained.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Matthias Augustus Stroh in the Great Seal Patent Office on
the 6th May 1878.
JOHN MATTHIAS AUGUSTUS STROH, of Hampstead Road, in the County of
Middlesex. "IMPROVEMENTS IN MEANS OR APPARATUS FOR REGULATING THE
SPEED OF CLOCKWORK FOR TELEGRAPHIC AND OTHER PURPOSES."
The Invention has for its object improvements in means or apparatus_for
regulating the speed of clockwork for telegraphic and other purposes, and is
applicable to cases where it is desirable to provide a means for varying at will and
instantaneously the speed of clockwork. For this purpose I employ one or more
cylinders and pistons working therein. These pistons are connected to and operated
by an arrangement of beams, connecting rods and levers, connected to and set in
motion by a crank or cranks rotated by the clockwork.
The pistons do not fit accurately the cylinders, but a slight space is left between
them and the sides of the cylinders, so as to. allow air gradually to pass from the
one side to the other of the pistons. The cylinders are open at one end and are
closed at the other, except that they are provided at such closed ends with apertures
capable of being more or less partially or entirely opened or closed by a suitable
valve or cover, which is capable of being operated by means of a lever so as to
admit a greater or less quantity of air to the cylinder through the valve, or to cut
off the supply of air entirely from the closed end thereof.
Suitable counterbalance weights are employed on the beams to counterbalance
the weight of the pistons.

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 is an elevation with the side plate removed; Figure 2 is an opposite
side view; and Figure 3 is a plan showing my Invention applied to a piece of
clockwork, such as is employed for feeding forward a strip of paper in printing
telegraphic apparatus; and Figure 4 is a section on line 1, 1, of Figure 3, through
one of the cylinders and air passages and valve; and Figure 5 is an under side
view of the cylinder's air passages and valve..
As the construction of the clockwork represented in the Drawings is well known
and differs only in the application of my Invention thereto, in lieu of the means
ordinarily employed for regulating the speed of the same I will confine the present
description to my improved regulating apparatus.
a is an axis set in motion by the train of gearing; b is a crank disc mounted
thereon; and b' is a crank pin fixed in the disc b; c, c', are two links or connecting
rods mounted at one end on the crank pin b¹, and at the other end pin jointed
respectively to the lever d and to the lever e¹, which latter is fixed to a tube or
sleeve e working loosely on the axis f of the lever d, to which tube or sleeve e is
also fixed the lever e². By these means the crank pin 61 is caused to give motion
to both levers d and e², but so that the said levers work the one in advance of the
other. The levers d and e² are pin-jointed to piston rods g', connected to pistons g
working in cylinders h.
The pistons g do not fit accurately the cylinders h, but a slight space is left
between them and the sides of the cylinders so as to allow air gradually to pass
from the one side to the other of the pistons g. The cylinders h are open preferably
at the lower end, as shown, and are closed at the upper end except that they are
provided at such closed ends with apertures or passages i capable of being more or
less partially or entirely closed by a suitable valve or cover j, which is capable of
being operated by means of a lever 7 connected thereto by means of a link k so as
to admit a greater or less quantity of air to the cylinders h through the valve j, or
to cut off the supply of air entirely from the closed end thereof, except such as will
pass between the piston and cylinder.
Suitable counterbalance weights d¹, es, are fixed on the levers or beams d, e², to
counterbalance the weight of the pistons.
The pistons g being loosely fitted as above described work without appreciable
friction, as the air passing from the one side to the other around the edges of the.
pistons keeps the pistons central in the cylinders.
The speed of the clock work is regulated by the extent to which the apertures or
air passages i in the cylinders h are opened or closed; thus when fully open a
comparatively free passage for air is provided to the closed ends of the cylinders h,
and thereby less resistance is offered to the motion of the pistons, whilst more
resistance is offered to the motion of the pistons g in proportion to the extent to
which such apertures or air passages i are covered by the valve or cover j.
I would here remark that only one piston and cylinder may be employed in
carrying my Invention into effect, although two are preferable, and different means
may be employed to communicate motion from the train of gearing to the pistons,
and a different construction of valve may be employed without departing from the
peculiar character of my Invention.
The Invention is more especially applicable to arrangements of clockwork
employed to feed forward the strip of paper in printing telegraphic apparatus, and
enables the speed of the clockwork to be readily and instantaneously changed from
that suitable for the printing telegraph, when operated automatically, to that suitable
for the printing telegraph when operated by hand, and vice versa.

page_text: Another advantage of this arrangement is that on starting the clockwork the
required speed is instantly obtained.
Having thus described the nature of my said Invention and the mode in which
I prefer to carry the same into effect, I would have it understood that what I
claim is,―
First. The employment of one or more pistons and cylinders, air passages, and
valve or valves for regulating the speed of clock work in manner and for the purpose
substantially as herein shown and described.
And, Secondly. I claim the employment in regulating apparatus for clockwork of
one or more pistons fitting loosely into cylinders, so that the air in passing from one
side to the other of the pistons, between the pistons and cylinders, causes the
pistons to retain a central position within the cylinders, and thereby to work
without appreciable friction, in manner substantially as herein shown and described.
In witness whereof, I, the said John Matthias Augustus Stroh, have hereunto
set my hand and seal; this Sixth day of May, in the year of our Lord One
thousand eight hundred and seventy-eight.