Improvements in Apparatus for Converting Reciprocal into Rotary Motion.
Year: 1897

page_text: Date of Application, 11th Feb., 1897
Complete Specification Left, 11th Nov., 1897-Accepted, 18th Dec., 1897,
Magdeburg, in the German Empire, Engineers.]
Improvements in Apparatus for Converting Reciprocal into Rotary
Motion.
I, WILLIAM EDWIN HEYS of 70 Market Street Manchester in the county of
Lancaster, Chartered Patent Agent, do hereby declare the nature of this invention
to be as follows:
This Invention relates to Apparatus for converting reciprocal into rotary motion,
and more particularly to Ratchet Wheel Motions, in connection with which I will
describe these Improvements as communicated to me by my Foreign Correspon-
dents.
The arm or lever by which the motion is transmitted to the ratchet wheel or its
equivalent is articulated near to the wheel, and the pawl is a fixture on the part of
the lever outside the joint. Therefore, when the lever is moved in one direction, the
pawl will engage with the teeth and rotate the wheel, but when the lever is moved in
the opposite direction, the pawl will be raised from engagement by the unbending
of the lever, so that the lever may be returned for the commencement of another
stroke. Inasmuch as during the return of the lever the pawl will be out of contact with
the teeth, these Improvements will produce a silent ratchet feed_motion. To prevent
the too great bending of the lever at the return, any suitable stop may be provided.
To prevent the return of the wheel, under light loads, any suitable kind of brake or
retarding device may be employed.
Dated this tenth day of February A.D. 1897.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Converting Reciprocal into Rotary
Motion.
I, WILLIAM EDWIN HEYS of 70 Market Street, Manchester, in the county of
Lancaster, Chartered Patent Agent, 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 Ivenntion relates to apparatus for converting reciprocal into rotary motion,
and more particularly to ratchet wheel motions, in connection with which I will
describe these improvements as communicated to me by my foreign correspondents.

page_text: The accompanying drawings to which I will hereinafter refer illustrate the
application of this invention to a ratchet wheel.
Figures 1 and 2 illustrate respectively in side elevation and cross section one form
of the improved apparatus.
Figure 3 similarly represents in side elevation part of an apparatus with a slight
modification.
Figure 4 is a view in section along the line x-x Figure 3.
Figure 5 shews a retarding device or brake which may be employed to prevent the
accidental return of the wheel.
The ratchet wheel A may be of any suitable construction and has pivotted or
combined with it in any usual or convenient manner the arm or lever B. This, arm
or lever, instead of extending in one solid piece and being provided with a handle as
is usual, is pivotted or jointed to a second arm B¹. This second arm is provided with
a fixed projection or the like to forin the pawl C, and the two arms are so connected
that the outer one or handled arm B¹ is capable of being moved to a slight extent
relatively to the arm B.
When the arm B¹ is moved from left to right of the position indicated in Figure 1
it first tilts or rocks upon its pivot D until the pawl C is raised from out of
engagement with the teeth of the wheel and until further independent movement is
prevented by the stop F. The further movement of the arm is now partaken of by
the arm B and the pawl C is carried round the wheel to any desired position. In
this movement the pawl is quite out of contact with the teeth of the wheel and a
silent motion is ensured
When the handle is moved in the other direction to feed the ratchet wheel forward,
the arm B¹, as before, first moves independently until the pawl is tilted into contact
with the wheel teeth. Further independent motion is thus stopped and the wheel
is fed forward.
In order to ensure that the arm B¹ shall move before the arm B and thus effect
the engagement or disengagement of the pawl it is preferred to provide the latter
arm with a frictional or similar device. This, as shewn by Figures 1 and 2, may
consist of a spring controlled piston F which presses and rubs against the side of the
wheel A.
In a modified form illustrated by Figures 3 and 4 the frictional device may
consist of a bowed or bent spring G secured to the arm B and adapted to press with
its ends against the wheel. It will be evident, however, that many other forms of
devices may be employed to prevent the too early movement of the arm B.
In Figure 5 is shown a form of brake which may be used to retard the motion
of the wheel and prevent its accidental motion or return. The type shown consists
of a spring H secured to any convenient fixed part of the apparatus and rubbing
against the wheel A.
Having now particularly described and ascertained the nature of my said inven-
tion and in what. manner the same is to be performed, as communicated to me
by my foreign correspondents, declare that what I claim is :-
:-
1. An apparatus for converting reciprocal into rotary motion consisting essentially
of a ratchet wheel and a jointed arm or lever one part of which carries the pawl, all
constructed arranged and operating substantially as and for the purpose hereinbefore
set forth and as illustrated by the accompanying drawings.
2. An apparatus for converting reciprocal into rotary motion constructed arranged
and operating substantially as and for the purpose herein before described and as
illustrated by the accompanying drawings.