Improvements in Gearing for Transmitting Rotary Motion.
Year: 1898

page_text: Date of Application, 22nd Feb., 1898
Complete Specification Left 22nd Nov. 1898-Accepted. 23rd Dec.. 1898
Date of Application, 22nd Feb., 1898
Complete Specification Left. 22nd Nov. 1898-Accepted. 23rd Dec.. 1898
PROVISIONAL SPECIFICATION.
Improvements in Gearing for Transmitting Rotary Motion.
We, THOMAS WILLIAM BLUMFIELD, of Ernest Street Works, Birmingham, in the
County of Warwick, and HUBERT BERGER-GRAHAM, of 116, St. Stephen's Avenue,
Notting Hill, in the County of London, Engineers, do hereby declare the nature of
this invention to be as follows:-
:-
This invention relates to improved driving mechanism whereby the motion of a
driving shaft in one direction can be transmitted to a driven shaft in the same or
an opposite direction, or whereby the driven shaft remains at rest notwithstanding
the continued motion of the driving shaft.
According to our invention we loosely mount on the driven shaft a sprocket or
other wheel through which the motion is communicated and which is hereinafter
referred to as the main wheel, and on either side of this wheel we mount on the
driven shaft a spur wheel with which a pinion or pinions mounted on the main
wheel engages or engage.
The main wheel is adapted to be locked to the shaft by a friction clutch or the
like.
One of the spur wheels hereinbefore described is fixed to the shaft and rotates
therewith whilst the other is loose thereon but is adapted to be held against
rotation by a friction band or the like.
With this arrangement of mechanism if the motion of the main wheel is to be
directly communicated to the shaft the said wheel is locked thereto by the friction
clutch or the like whilst if the shaft is to be rotated in the reverse direction to the
main wheel the spur wheel which is loose upon the shaft is held against rotation
so that the motion of the main wheel is communicated to the shaft through the
pinions which roll around the spur wheel which is held against rotation and
transmit motion to the spur wheel which is fixed to the shaft.
When the main wheel is to rotate whilst the shaft remains at rest the spur
wheel held against rotation is released so as to rotate with the main wheel.
Dated the 22nd day of February 1898.
COMPLETE SPECIFICATION.
Improvements in Gearing for Transmitting Rotary Motion.
We, THOMAS WILLIAM BLUMFIELD, of Ernest Street Works, Birmingham, in the
County of Warwick, and HUBERT BERGER-GRAHAM, of 116, St. Stephen's Avenue,
Notting Hill, in the County of London, Engineers, 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:-
This invention relates to improved driving mechanism whereby the motion of a
driving shaft in one direction can be transmitted to a driven shaft in the same or

page_text: an opposite direction, or whereby the driven shaft remains at rest notwithstanding
the continued motion of the driving shaft.
According to our invention we loosely mount on the driven shaft a sprocket or
other wheel through which the motion is communicated and which is hereinafter
referred to as the main wheel, and on either side of this wheel we mount on the
driven shaft a spur wheel with which a pinion or pinions mounted on the main
wheel engages or engage.
The main wheel is adapted to be locked to the shaft by a friction clutch or the
like.
One of the spur wheels herein before described is fixed to the shaft and rotates
therewith whilst the other is loose thereon but is adapted to be held against
rotation by a friction band or the like.
To enable our invention to be fully understood we will describe the same by
reference to the accompanying drawing, in which :-
Figure 1 is an elevation of transmitting gear constructed according to our
invention; and,
Figure 2 is a vertical section of the same.
a is the main driving wheel which as shewn has sprocket teeth b upon its
periphery and the boss c of which is loosely mounted upon the shaft d, the said
wheel having at one side of it a flange e in conjunction with which suitable friction
mechanism fixed to the shaft d and rotating therewith may be applied in order to
lock the said wheel a to the shaft d. f, g are the spur wheels mounted on opposite
sides of the main wheel a, the former of which is secured to the shaft for instance.
by means of a key has shewn, whilst the latter which is free to rotate relatively
with the shaft, is provided with a lateral extension or flange around which a
friction band can be placed to hold the said wheel g against rotation. j is a
double pinion carried upon a pink in the wheel a and engaging with the teeth
of the wheels f and J.
With this arrangement of mechanism if the motion of the main wheel is to be
directly communicated to the shaft, the said wheel is locked thereto by engaging the
friction clutch with the flange e whilst if the shaft is to be rotated in the reverse
direction to the main wheel the spur wheel i is held against rotation by the friction
band around it so that the motion of the main wheel is communicated to the
shaft through the double pinion which as it rolls around the spur wheel g
transmits motion to the spur wheel f and thence to the shaft.
When the main wheel is to rotate whilst the shaft remains at rest, the spur
wheel g is released by slacking the friction band upon the extension i so that any
motion which the said wheel g receives from the double pinion j which rolls around
upon the teeth of the wheelf upon the shaft will be idle motion.
Although we have only described the use of one double spur wheel ; it is to be
understood that in practice two (as shewn) or more of such wheels may be made use
of so as to reduce the strain upon the individual teeth of the wheels fand g as much
as possible.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is: -
The improved gearing for transmitting rotary motion consisting of the parts
constructed and combined, substantially as hereinbefore described and illustrated
in the accompanying drawing and operating as, and for the purposes, set forth.
Dated this 2nd love of Novambar 1909
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants