Year: 1888

page_text: Date of Application, 8th Mar., 1888
Complete Specification Left, 8th Jan., 1889
Complete Specification Accepted, 2nd Mar., 1889
I, SAMUEL SHAW of 78 Maple Street, Hollinwood in the County of Lancaster
selfactor minder do hereby declare the nature of this invention to be as follows:-
My invention relates to apparatus for lifting belts or straps upon driving pulleys
and consists in improved arrangement or construction of said apparatus, which may
be utilised at the same time to prevent shafts jumping and breaking their pedestals
or hangers when the engine attains an excessive speed or races, the object of my
invention being to prevent accidents accompanied by personal injuries or loss of life
which now frequently occur when putting or lifting straps upon pulleys by hand and
at the same time to prevent accidents resulting from the jumping of shafts when the
engine races.
My improved apparatus consists of a hanger which is fixed above the shaft at a
short distance from the pulley. The banger by preference is forked at the lower end
and astride over the shaft, the part above the centre of the shaft being only just clear
of the shaft, so that when the engine begins to race and the shaft begins to vibrate, it
cannot jump up and break the pedestal caps or hangers. A tube or long bush is
attached to or formed on the hanger, through which tube or bush the shaft passes
freely. The tube or bush is turned on its outside and a moveable bush or sleeve is
placed upon it. The end of this sleeve next to the hanger is formed as a cam and is
pushed against a bowl revolving on a pivot upon the hanger by a spring inserted
between the other end of the sleeve and a collar upon the end of the tube which is
near to the pulley. An inclined lifting arm is formed on or attached to the sleeve,
and a bracket with a curved lifting plate is bolted to the arm and can be adjusted to
different diameters of pulleys so that said plate can just pass over the rim of the
pulley. The lifting plate has a lug or projection formed on it on the side farthest
from the pulley. A chain is passed over the sleeve and attached to it, so that by
pulling one end of the chain the sleeve can be turned round on the tube.
The method of using the apparatus is as follows: The strap to be put upon the
pulley is hung over the tube and spring and its ends are fastened or laced together.

page_text: The strap not being in contact with the shaft does not require to be held and cannot
be lapped round the shaft, and accidents arising from this cause are prevented. The
arm of the sleeve hangs down during this operation, the edge of the lifting plate
-being near to the edge of the pulley rim. When the strap has been pieced, the sleeve
is pulled round by the chain, when the inclined arm on the sleeve brings the strap
upon the lifting plate and the latter raises it. As the sleeve is turned farther, the
cam on its end pushes it towards the pulley, so that the lifting plate passes over the
rim of the pulley and the lug on it pushes the belt upon the pulley. The cam is so
formed that it holds the lifting plate over the pulley while passing over the top of the
pulley and releases the sleeve shortly after the plate has passed the top, when the
spring moves the sleeve and lifting plate away from the pulley, leaving the strap
upon it. The person operating the chain may stand at a considerable distance from
the strap and all danger of being seized by the latter and injured is obviated.
Dated this. 7th day of March 1888.

page_text: I, SAMUEL SHAW of 78, Maple Street, Hollinwood, in the County of Lancaster,
selfactor minder, 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 apparatus for lifting belts or straps on driving pulleys
and consists in an improved arrangement or construction of said apparatus, which
may be utilised at the same time to prevent shafts jumping and breaking their
pedestals or hangers when the engine races or attains an excessive speed, the object
of my invention being to prevent the accidents accompanied by personal injuries
or loss of life which now frequently occur when putting or lifting straps on
driving pulleys by hand and at the same time to prevent accidents resulting from the
jumping of shafts when the engine races.
On the drawings appended hereunto my improved apparatus is shewn in a
perspective view. It consists of a hanger a which is fixed above the shaft b at a
short distance from the pulley. The hanger is by preference forked at the lower end
and astride over the shaft, the part above the centre of the shaft being only just
clear of the shaft, so that when the engine begins to race, the shaft cannot jump up
and break the pedestal covers or hangers. A tube or long bush c is attached to or
formed on the hanger, through which tube or bush the shaft passes freely. The tube
or bush is turned on its outside and upon it a moveable bush or sleeve d is placed made
preferably in two parts bolted together as shewn for convenience. The end of this
sleeve next to the hanger is formed as a cam and is pushed against a bowl e revolving
on a pivot fupon the hanger by means of a spring 9 inserted between the other end
of the sleeve and a collar h fixed upon the end of the tube, which is close to the pulley.
Formed on or attached to the sleeve is an inclined lifting arm i to which a bent
lifting plate or its equivalent is bolted and can be adjusted to different diameters of
pulleys so that said plate can just pass over the rim of the pulley. The lifting plate
has a lug or projection l.formed on it on the side farthest from the pulley, and over
the sleeved a chain m is passed and attached to it, so that by pulling one end of the
chain the sleeve can be turned round on the tube c.
The method of using the apparatus is as follows: The strap to be put upon the
pulley is hung over the tube c and spring g and its ends fastened or laced together.
The strap not being in contact with the shaft, does not require to be held and cannot
be lapped round the shaft, and accidents arising from this cause are prevented. The
arm on the sleeve hangs down during this operation, the edge of the lifting plate
being near to the edge of the pulley rim. When the strap has been pieced, the sleeve
is pulled round by the chain m, and the strap raised by the lifting plate. In order to
obviate the necessity of placing the strap close to the edge of the pulley while piecing
up, which might cause accidents, the inclined arm i besides being inclined to the shaft
is also by preference inclined backwards from the radius passing through the root of

page_text: k
l
the arm, or it may be curved backwards, so that the parts of the arm nearer to the
shaft come first against the edge of the strap and shift it towards the edge of the
pulley, or the lug or projection / may be made long and curved away from the pulley
for the purpose of shifting the strap towards the edge of the pulley, so that it will
come fully upon the plate k when the arm is turned round the shaft. As the
sleeve d is turned further, the cam on its end pushes it towards the pulley, so that the
lifting plate passes over the rim of the pulley and the lug on it pushes the belt
upon
the pulley. The cam is so formed that it holds the lifting plate over the pulley
while it passes over the top of the pulley and releases the sleeve shortly after the
point d' of the incline has passed the bowl e, when the spring y moves the sleeve
and lifting plate k away from the pulley and the arm returns to its original position.
The person operating the chain can stand at a considerable distance from the strap and
all danger of his being seized by the latter and injured is obviated.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed, I declare that what I claim is,
. Firstly, hangers astride over the shaft for preventing the jumping of the same,
substantially as hereinbefore described and illustrated by the drawings.
Secondly, in strap lifting-on apparatus, the combination of a strap lifting arm
revolvable on a bush, with a cam for moving the same over the pulley and a spring
for withdrawing the same from over the pulley, substantially as hereinbefore described
and illustrated.
Thirdly, the combination of the shaft guard and lifting-on apparatus specified in
the two preceding claims in one apparatus.
Fourthly, the general arrangement of combined shaft guard and strap lifter-on
herein before described and illustrated by the drawings.
Dated this 7th day of January 1889.
EMMOTT & Co.,
Agents for the Applicant.