Improvements in Hoisting and Lowering Gear.
Year: 1896

page_text: Date of Application, 27th Aug., 1896
Complete Specification Left, 27th May, 1897-Accepted, 3rd July, 1897
PROVISIONAL SPECIFICATION.
Improvements in Hoisting and Lowering Gear.
I, ROBERT MAGUIRE, of 4 Wellfield Street, Springburn, in the County of the City
of Glasgow, Engineer, do hereby declare the nature of this Invention to be as
follows:-
This Invention is an improvement on that described in the Specification of Letters
Patent No. 24187 of 1893 granted to me and having for its object to relieve the
strain upon the hauling rope or chain when the same is not in use although a weight
is suspended from it, the present improvements being designed to render automatic
the locking and releasing of the bolt or rod attached to the loaded end of the rope.
The apparatus comprisos, as described in the above mentioned Specification, a
bolt, rod or hook from which the load is suspended, and a hauling rope or chain
attached to the hook and passing over a pulley centred in a bracket adapted to be
secured to a beam or rafter or other fixture, the rope having its other end connected
to a ring or handle. The bracket carrying the pulley is composed of two side cheeks
with an eye at the front sufficiently wide to permit of the suspending bolt or rod
passing through it. At a short distance above this eye an inclined guido piece is
situated, which extends inwards and down towards the body of the carrying
bracket. The guide has a slot formed in it extending from its inner end and
terminating in an eye the centre of which is at a greater horizontal distance from
the centre of the pulley than is the line of the hauling rope, that is, whose centre is
out of the vertical line of the rope carrying the load.
The action of the apparatus is as follows:-When the goods are raised the hoad
of the bolt or rod passes through the eye in the forward end of the carrying bracket
and comes into contact with the inclined guide piece when by further hauling the
head of the bolt slides up the inclined piece until it reaches and passes through the
eye formed therein. After the bolt has passed through this eye the load being now
released from the outward thrust draws the rope and with it the bolt to its original
position; and on releasing the hauling rope the head of the bolt travels down the
upper side of the inclined guide until it rests on the carrying bracket. When it is
desired to lower the goods the rope is pulled and the head of the bolt or rod passes
between the under side of the inclined gnide pieco and the end of the carrying
bracket until it reaches the eye in the latter when the rope is lowered, the locking
and unlocking being by these means effected automatically.
In a modification of the Invention the separate inclined guide piece is dispensed
with and the eye on the carrying bracket is formed with an inclined under side on
which the head of the bolt acts in the mannor already described with reference to
the raising of the load, until the head of the bolt rests upon the upper side which is
also inclined when it is caused by slightly slackening the hauling rope to travel
downwards and inwards until it rests on horizontal ledges on the cheeks of the
carrying bracket. On lowering the load the head of the bolt when the rope is pulled
enters inclined grooves formed in the cheeks of the carrying brackets near the eye
and passes out in this way from between the cheeks.
In lieu of the devices described any other form of guide may be used which will
automatically direct the head of the bolt on to the carrying bracket when the load
is raised, and which will permit of the disengagement of the bolt in lowering the
load

page_text: Instead of forming a head on the bolt as described, a ball or its equivalent may
be secured on the rope a short distance above the bolt when it is desired that the
bolt should swing clear of the carrying bracket in order to permit of the suspended
goods being turned to expose either side.
The above described hoisting and lowering gear is equally applicable to hand 5
and power haulage.
1
1000
I, ROBERT MAGUIRE, of 4 Wellfield Street, Springburn, in the County of the City
of Glasgow, 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 :--
This Invention which relates to hoisting and lowering gear is an improvement on
that described in the Specification of Letters Patent No. 24187 of 1893 granted to
me, and it hus for its object to relieve the strain upon the hauling rope or chain
when the same is not in use although a weight is suspended from it, the present
improvements being designed to render automatic the locking and releasing of the
bolt or rod attached to the loaded end of the rope.
The Invention is illustrated by the accompanying drawings, fig. 1 being a vertical
section and fig., 2 a front view of one modification of the improved hoisting and
lowering gear. Fig. 3 is a view of a slightly modified form of carrying bracket.
Figs. 4 and 5, and 6 and 7 are respectively views corresponding to figs. I and 2 but
shewing two other modifications of the hoisting and lowering gear.
Referring to figs. 1 and 2 the apparatus comprises a bolt, rod or hook Å from
which the load is suspended, and a hauling rope or chain B attached to the hook A
and passing over a pulley C centred in a bracket D adapted to be secured to a beam
or rafter or other fixture, the rope B having its other end connected to a ring or
handle B. The bracket D carrying the pulley O is composed of two side chooks
with an eye E at the front sufficiently wide to permit of the suspending bolt or rod A
passing through it. At a short distance above this eye E an inclined guide piece I'
is situated, which extends inwards and down towards the body of the carrying
bracket D. The guido F has a slot G formed in it extending from its inner end and
terminating in an eye H the centre of which is at a greater horizontal distance from
the centre of the pulley C than is the line of the hauling rope, that is whose centre
is out of the vertical line of the rope carrying the load.
The action of the apparatus is as follows: When the goods are raised the head
of the bolt or rod A. passes through the eye E in the forward end of the carrying
bracket D and comes into contact with the inclined guide piece F when by further
hauling the head of the bolt A slides up the inclined piece Funtil it reaches the
position shown in dotted lines at fig, 1 whence it passes through the eye H formed
therein. After the bolt A has passed through this eye H the load being now
released from the outward thrust draws the rope B and with it the bolt A to its-
original line of travel; and on releasing the hauling rope B the head of the bolt A
travels down the upper side of the inclined guide F until it rests on horizontal
ledges I on the carrying bracket D as shown in dotted lines at fig. 1. When it is
desired to lower the goods the rope B is pulled and the head of the bolt or rod A
passes between the under side of the inclined guide piece F and the end of the

page_text: carrying bracket D until it reaches the eye E in tlie latter when the rope B is
lowered, the locking and unlocking being by these meaus effected automatically.
In the modification illustrated by fig. 3 the separate inclined guide piece Fis
dispensed with and the eye E on the carrying bracket D is formed with an inclined
under side J on which the head of the bolt A acts in the manner already described
with reference to the raising of the load, until the head of the bolt A rests upon the
upper side K which is also inclined when it is caused by slightly slackening the
hauling ropo B to travel downwards and inwards until it rests on the horizontal
ledges I on the cheeks of the carrying bracket D. On lowering the load the head
of the bolt A when the rope B is pulled enters inclined grooves formed in the cheeks
of the carrying bracket D near the eye E and passes out in this way from between
the cheeks.
In lieu of the devices described any other form of guide such as illustrated by
figs. 4, 5, 6 and 7 may be used which will automatically direct the head of the bolt
on to the carrying bracket when the load is raised, and which will permit of the
disengagement of the bolt in lowering the load.
In a modification of the above arrangement and which is illustrated by figs. 4 and 5
the carrying bracket D may have its eye piece E pivoted, the pivots being in the
aides of the bracket D. The inclined guide K down which the bolt travels is pivoted
instead of fixed as described with reference to figs. 1 to 2 and is pushed aside by the
descending bolt when the goods are being lowered until the head of the bolt rests
on the ledges I when the inclined guide K resumes its former position and so with
the rest or ledges I forms the return groove for the passage of the bolt when the
goods aro being lowered. After the head of the bolt has reached the end of the
groove K¹ it comes in contact with the pivoted eye piece E and raises this against
the edges of the carrying bracket D which thus forms a barrier and prevents the
bolt A being again passed over the guide K, the load being thereafter lowered.
In the modification illustrated by Figs. 6 and 7 the carrying bracket D has pivoted
to it on the pulley centre on either side of the bracket a jawed guide piece L, which
when the head of the bolt A bears against the inclined guide K formed on the
bracket D is pushed aside and permits the head of the bolt to pass above it. The
jawed guide piece L then falls by its own weight into its original position by which
the head of the bolt on being lowered is caused to act upon the upper side of the
inclined guide K and push the jawed pioco L to the other side until the head of the
bolt A rests upon the ledges I. When the rope is raised to lower the goods the jawed
piece falls back to its former position and allows the bolt A to be lowered. The
jawed guide piece L has also a pivoted eye piece which acts as described with
reference to figs. 4 and 5.
Instead of forming a head on the bolt as described, a ball or its equivalent may
be secured on the rope a short distance above the bolt when it is desired that the bolt
should swing clear of the carrying bracket in order to permit of the suspended goods
being turned to expose either side.
The above described hoisting and lowering gear is equally applicable to hand and
power hanlage.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the saine is to be performed, I declare that what I
claim is :-
1. The improved hoisting and lowering gear comprising the carrying bracket D
and its pulley O said bracket having in it an eye E for the passage of the head of
the bolt A and an inclined guide piece F upon either side of which the head of the
bolt A acts in order to automatically bring the bolt to rest upon ledges or stops I on
the carrying bracket D substantially as described with reference to figs. 1 and 2 of
the annexed drawings.
2. In hoisting and lowering gear of the class set forth in claim 1 the carrying.
bracket D having pivoted to it an eye piece El and having a pivoted inclined guide K

page_text: which automatically directs the head of the bolt A to its seat on the ledges or stops I
substantially as described with reference to figs. 3 and 4 of the annexed drawings.
8. In hoisting and lowering gear of the class set forth in claim 1 a jawed guido
piece L pivoted on the pulley centre and having a stationary guide K upon either
side of which the head of the bolt acts in order automatically to bring the bolt to 5
rest upon ledges or stops I in the jawed guide substantially as described with
reference to figs. 5 and 6 of the annexed drawings.
Dated this 26th day of May 1897
WALLACE FAIRWEATHER,
of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents, 62 Saint Vincent Street, Glasgow,
Agent for the Applicant.