Improvements in Driving Gear or Mechanism for Transmitting and Increasing Power.
Year: 1891

page_text: COMPLETE SPECIFICATION.
Improvements in Driving Gear or Mechanism for Transmitting and
Increasing Power.
We THEODOR KRIEG and WILLI FRANK both of Braunschweig in the Empire
of Germany Manufacturers, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement :---
This invention relates to mechanism which has for its object to increase the
driving power of transmission gear by the means hereinafter set forth.
We shall first proceed to describe the arrangement of this gear or mechanism and
then we shall explain its mode of operation.
.
The gear or mechanism is shown in the accompanying drawings in which
Figure 1 is a front view and
Figure 2 a vertical section through the centre of Figure 1.
Arrangement: The driving pin wheels B which are separated by a pulley
receive a motion transmitted to them by means of belts from the fly wheel of a steam
engine or of any other motor. These wheels B are firmly keyed upon a shaft g
carried by the two suspended bearings h.
The upper ends of the two bearings are firmly screwed to the top of the engine
frame.
The driving wheels B gear by means of the steel pins arranged upon their
periphery with the pins of the disc or wheel A which pins i are arranged on both
sides or edges of the periphery of the said wheel as shown.
The solid disc or wheel A bears with its whole weight upon the periphery of the
large disc or wheel D at the contact point Cu.
The shaft w of the pulley A turns between the anti-friction rollers v fixed
to the bearing forks for the purpose of reducing friction the said bearing forks
being firmly screwed upon a slide S S which is moved to and fro by means of the
hand wheel H and axis P in guides or rails G fixed to the top M of the frame of
the engine.
Upon the axis P is mounted an adjustable collar p¹ which is fastened to the
slide S and limits its forward motion and a guiding collar p" which moves loosely
in the bearings P" of the axis P.
By moving the slide S S forward or backward (Figure 2) by means of the axis P
carried by P (Figure 1) the horizontal and vertical position of the shaft w of the
pulley A is determined or can be altered while the forks ¹ being open downwardly
the contact point C" of the wheel A with the large wheel D can be likewise
determined by the to and fro motion of the said slide S.
The wheel D is firmly keyed upon the motor shaft d carried by the plummer
block L.
The to and fro motion of the slide S by means of the axis P serves also to couple
or uncouple the wheel A with or from the wheel B according as the teeth or pins i
and are in gear or not the wheel A being consequently drawn back when it is
required to uncouple until the said teeth and are disconnected.
The top M of the machine frame is carried by the pillars T which may however
be dispensed with in practice this top being replaced by the cover of the machine
frame if desired.
Mode of Operation :-The gear or mechanism operates as follows:-The pulley c
between the two pin wheels B is set in rotation by a belt 1 so that the pins of
these two wheels gear with the pins i arranged on both sides of the heavy wheel A
and thus transmit a rotary motion to the latter.
The working of each pin of the wheels B resembles the action of a lever having

page_text: its fulcrum situated in the centre of the shaft g. The power transmitted by this
lever is applied on the outermost end of each single lever or pin .
The comparatively small amount of friction developed in this pin gearing which
is necessary to set the solid wheel A in rotation causes an economy of driving
power.
As soon as the wheel A is set in motion an intense pressure due to its weight is
applied on the wheel D owing to the shaft w being unsupported. If the relative
position of the axis w and of the shaft d in different vertical planes is taken into
consideration while at the same time the intense pressure as well as the immense
friction between the pulley A. and the wheel D is also kept in view it will be obvious
that by this friction a transmitting power of great intensity will be obtained at the
contact point C and the heavier the pulley A the greater will be the friction
causing an increase of the transmitting power.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
A power increasing gear or mechanism having a heavy wheel A set in motion by
the pin gearing i and whose shaft or axis w is unsupported and can be displaced
in a horizontal direction by means of the slide S so that its distance between its
vertical plane and that of the shaft d can be increased or decreased whereby the
contact point C" between the wheel A and the transmission wheel D can be
displaced whereby in consequence of the weight of the wheel A and of the friction
developed thereby upon the wheel D driving power is gained substantially in the
manner and for the purposes hereinbefore described and illustrated in the drawings
hereunto annexed.
Dated this 28th day of July 1891.
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Patentees.