An Automatic Brake or Self-sustaining Lift Gear.
Year: 1894

page_text: Date of Application, 4th May, 1894
Complete Specification Left, 4th Feb., 1895-Accepted, 27th Apr., 1895
PROVISIONAL SPECIFICATION.
An Automatic Brake or Self-sustaining Lift Gear.
I JOHN SUCH King Street Iron Works Cheltenham in the County of
Gloucestershire Engineer do hereby declare the nature of this invention to be as
follows:-
My invention relates to a mechanical arrangement used in lifts, hoists, and other
similar machines, which are actuated either by means of an endless rope, friction
gear, or otherwise, and has for its object to provide a simple and efficient means
whereby the said machines will be automatically self sustaining.
To carry out my said invention I provide a frame work analogous to that used
in chain lifting tackle, for the purpose of carrying a lifting chain brake wheel,
(hereinafter called the brake wheel) over which is suspended the weight to be
lifted, the periphery of the said brake wheel may be plain, fluted, or any other
suitable shape, to fit into, and engage with a corresponding shaped brake block,
which I fix to the said frame, and for lifting purposes, immediately under the
brake wheel in the centre or hub of the brake wheel is a taper hole into which is
fitted a corresponding taper flanged driving shaft, or spindle, the said flange being
connected to the brake wheel by two or more link chains, in such a manner that
when the said taper shaft is rotated either way, a horizontal or sliding motion
takes place at the same time, which forces the taper part of the driving shaft into
the hole of the brake wheel, thereby raising it off, and disengaging it from the
brake block, but immediately the driving power is released, the brake wheel and
its attendant load becomes free, and assuming its former position upon the brake
block becomes automatically self sustaining, and to assist the rotary and horizontal
motion hereinbefore described, I provide also a coil spring between the brake
wheel and flange of driving shaft.
Dated this Second day of May 1891
An Automatic Brake or Self-sustaining Lift Gear.
1 JOHN SUCH of King Street Iron Works Cheltenham in the County of
Gloucester Engineer 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 :-
My invention relates to a mechanism arrangement used in lifts hoists and other
similar machines which are actuated either by means of a rope, friction gear or
otherwise and has for its object to provide simple and efficient means whereby the
said machine will be automatically self sustaining.
To carry out my said invention I provide a frame work analogous to that used
in chain lifting tackle for the purpose of carrying a lifting chain brake wheel
(hereinafter called the brake wheel) over which is suspended the weight to be
lifted the periphery of the said brake wheel may be plain fluted or any other
suitable shape to fit into and engage with a corresponding shaped brake block
which I fix to the said frame and for lifting purposes immediately under the brake
**

page_text: wheel, in the centre or hub of brake wheel is a taper hole into which is fitted a
corresponding taper flanged driving shaft or spindle, the said flange being connected
to the brake wheel by two or more link chains in such a manner that when the
taper shaft is rotated either way a horizontal or sliding motion takes place at the
same time which forces the taper part of the driving shaft into the hole of
the brake wheel thereby raising it from the brake block but immediately the
driving power is released the brake wheel and its attendant load becomes free and
assuming its former position upon the brake block becomes automatically self
sustaining and to assist the rotary and horizontal motion herein before described
I provide also a coil spring between the brake wheel and flange of driving shaft.
In order that my invention may be clearly understood and more easily carried
into practice I have appended hereunto a sheet of drawings upon which I have
fully illustrated the nature of my said improvements together with the mode of
carrying the same into effect.
Figure 1 is a longitudinal sectional elevation through my automatic self sustaining
lift gear.
Figure 2 is an elevation of the lifting chain brake wheel and taper wedge.
In carrying my invention into effect I mount the brake wheel B upon the
shaft E with the intermediate wedge sleeve F which is fixed to or may form part
of the said shaft E the whole being supported by any suitable frame A while
around the brake wheel B the chain C carrying the weight to be lifted passes.
The periphery of the said brake wheel may be plain fluted or of other suitable
shape as may be required by the amount of weight to be lifted and is shaped to fit
the brake block D which is secured to the frame A as hereinafter described. The
hub b¹ of the brake wheel B is provided with the taper hole 62 into which the
corresponding taper or wedge F of the driving shaft E is fitted a certain amount of
clearance being provided to allow of the brake wheel B being slightly lifted a
flange is provided on the wedge F to which by means of two or more link
chains G the brake wheel B is attached so that when the taper shaft F is rotated
in either direction the said chains take a direction at an inclination to the axis
thereby drawing the brake wheel tightly on to the taper shaft F and thereby
lifting it and releasing it from the action of the brake block D but immediately
the driving power is released from the driving wheel H the load upon the chain C
by its reverse action causes the brake wheel B to become free from the taper
shaft F which drops and thereby becomes engaged with the brake block D as
shewn thus automatically sustaining the weight.
The coiled spring K is provided between the brake wheel B and flange f¹ to
assist in releasing the brake wheel B upon the reverse action and the brake
block D may be adjusted by the taper key J.
The frame A may be made in any form to suit the various requirements to be
met with and so long as I obtain the action herein described I do not confine
myself to the exact details of connection between the taper shaft F and brake
wheel B.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what my
claim is
1st. An automatic brake or self sustaining lift gear substantially as and for the
purpose herein set forth and described by the accompanying drawings.
2nd. An automatic brake or self sustaining gear consisting of the taper shaft F
and brake wheel B operated in combination substantially as and for the purpose
herein set forth and shewn upon the accompanying drawings.
Dated this 2nd day of February 1895.