Improvements in Hoisting or Lifting Machinery.
Year: 1896

page_text: Date of Application, 23rd Oct., 1896
Complete Specification Left, 22nd July, 1897-Accepted, 28th Aug., 1897
Date of Application, 23rd Oct., 1896
Complete Specification Left, 22nd July, 1897-Accepted, 28th Aug., 1897
PROVISIONAL SPECIFICATION.
Improvements in Hoisting or Lifting Machinery.
We, DAVID THOMAS YOUNG, and HARRY WILLIAM YOUNG, both of Ryland Street
Works, in the City of Birmingham, Manufacturers, do hereby declare the nature
of this invention to be as follows:-
This invention consists of improvements relating to the raising and lowering
of heavy bodies, our object being to construct simple and durable machines, for
attachment to a wall or in other required positions, having greater compactness
than the like machines at present in general use.
In the application of our invention to the construction of a double purchase wall
crab or hoist we mount the winding drum or barrel loosely upon a suitable centre
pin, shaft, or sleeve. Upon the inner circumference of the barrel rim we form or
attach toothed gearing into which engages a pinion formed upon or attached to
the second motion shaft. We also fix upon or form with this second motion shaft
a suitable toothed wheel into which gears a pinion formed on or attached to the
first motion shaft. When the machine is to be operated by manual power we form
a square upon the outer end or ends of the first and second motion shafts for the
reception of the ordinary crank handle or handles or hand wheel or wheels.
Upon either the first or the second motion shaft we provide a self sustaining
brake such as described in the Specification of our Patent No. 2742 of 1888, the
double cam of the brake mechanism being formed upon or secured to the shaft
and so arranged as to wedge the loose segments against the internal annular
surface of a brake disc when the load tends to run down. The brake disc is held
or prevented from rotation by a brake strap or band secured to a weighted lever,
the weight being adjusted to sustain the full load for which the machine is con-
structed but to permit of slipping in the event of over loading.
The load can be lowered gradually by turning the handle or handles in the
reverse direction to that required when raising the load, against the resistance
of the brake, or it may be lowered rapidly by raising or releasing the weighted
lever and band from the brake rim.
The whole of the mechanism for raising and lowering the load and for sustaining
the same is contained within or upon a bracket or framing provided with flanges
or projecting lugs by which it is bolted or secured to the wall or the support.
The mechanism can be power driven by means of belting running on a pulley
secured to the first motion shaft or by frictional or other suitable gearing.
The application of our invention to the construction of other forms or types of
lifting machinery differs only in the necessary modifications to meet varying
requirements from its application to a wall hoist as herein before described.
Dated this 22nd dox of October 1806
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Hoisting or Lifting Machinery.
DAVID THOMAS YOUNG, and HARRY, WILLIAM YOUNG, both of Ryland Street
in the City of Birmingham, Manufacturers, 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 consists of improvements relating to the raising and lowering
of heavy bodies, our object being to construct simple and durable machines, for
attachment to a wall or in other required positions, having greater compactness
than the like machines at present in general use.
In the accompanying sheets of explanatory drawings to be hereinafter referred
to.-
Figure 1 is a front elevation and Figure 2 a plan of a double purchase wall crab
or hoist constructed in accordance with our invention.
We mount the winding-drum or barrel A loosely upon a suitable centre pin,
shaft, or sleeve, and on the inner circumference of the barrel rim we form or attach
toothed gearing into which engages a pinion B formed upon or attached to the
second motion shaft C. We also fix upon or form with this second motion shaft C
a suitable toothed wheel D into which gears a pinion E formed on or attached to
the first motion shaft F. When the machine is to be operated by manual power
we form a square upon the outer end or ends of the first and second motion shafts
for the reception of the ordinary crank handle or handles or hand wheel or wheels.
Upon either the first or the second motion shaft we provide a self sustaining
brake such as described in the Specification of our Patent No. 2742 of 1888, the
double cam of the brake mechanism being formed upon or secured to the shaft
and so arranged as to wedge the loose segments against the internal surface of
a hollow brake disc when the load tends to run down. The brake disc is held
or prevented from rotation by a brake strap or band secured to a weighted lever G,
the weight being adjusted to sustain the full load for which the machine is con-
structed but to permit of slipping in the event of over loading.
The load can be lowered gradually by turning the handle or handles in the
reverse direction to that required when raising the load, against the resistance
of the brake, or it may be lowered rapidly by raising or releasing the weighted
lever and band from the brake rim.
The whole of the mechanism for raising and lowering the load and for sustaining
the same is contained within or upon a bracket or framing provided with flanges
ur projecting lugs as H, by which it is bolted or secured to the wall or the support.
The mechanism can be power-driven by means of belting running on a pulley
secured to the first motion shaft or by frictional or other suitable gearing.
The application of our invention to the construction of other forms or types of
lifting machinery differs only in the necessary modifications to meet varying
requirements from its application to a wall hoist as hereinbefore described.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what
we claim is:-
1. In hoisting or lifting machinery the improved combination and arrangement
of mechanism substantially as and for the purposes described.

page_text: 2. A wall crab or hoist constructed and arranged substantially as described and
as illustrated.
Dated this 21st day of July 1897
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicants.