ImproVEMENTS IN WAREHOUSE HOISTS OR CRANES
Year: 1875

page_text: LETTERS PATENT to John Barker, James Barker, and Thomas Barker,
all of John Barker & Sons, Limited, of the Park Street Iron
Works, Oldham, in the County of Lancaster, Engineers, for the
PROVISIONAL SPECIFICATION left by the said John Barker, James
Barker, and Thomas Barker at the Office of the Commissioners of
Patents, with their Petition, on the 1st December 1875.
We, JOHN BARKER, JAMES BARKER, and THOMAS BARKER, all of
John Barker & Sons, Limited, of the Park Street Iron Works, Oldham,
in the County of Lancaster, Engineers, do hereby declare the nature of
the said Invention for “ ImproVEMENTS IN WAREHOUSE HOISTS OR CRANES," to
be as follows :-
This Invention consists in certain improvements in the hoists or
cranes for which former Letters Patent were granted to the within-
named John Barker on the Fifth day of February 1875, No. 432.
Our improvements consist in making the carriage of the hoist or crane
with two pairs of guide rollers running on a horizontal or inclined beam,

page_text: and with two guide pulleys for the lifting chain or rope, which passes
under a snatch block between the guide pulleys. The lifting chain or
rope is wound on a barrel driven by friction, as usual. The carriage is
moved to and fro along the beam by a chain passing over a toothed
pulley, which is turned round in contrary directions by a friction pulley
supported in the end of a lever. This pulley is pressed against a small
driving pulley to move the carriage outwards, and it is brought in
contact with a friction belt to move the carriage inwards. The chain
after passing around the toothed pulley is taken over a guide pulley,
and then secured to the other side of the carriage. The lever supporting
the friction pulley is moved up and down by two chains connected to a
starting lever on the upright starting shaft. When this starting lever
is depressed the carriage is moved out, and when raised the carriage is
brought in.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Barker, James Barker, and Thomas Barker
in the Great Seal Patent Office on the 1st June 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
BARKER, JAMES BARKER, and THOMAS BARKER, all of John Barker
and Sons, Limited, of the Park Street Iron Works, Oldham, in the
County of Lancaster, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the First day of December, in the year
of our Lord One thousand eight hundred and seventy-five, in the thirty-
ninth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said John Barker, James Barker, and
Thomas Barker, Her special licence that we, the said John Barker,
James Barker, and Thomas Barker, our executors, administrators, and
assigns, or such others as we, the said John Barker, James Barker, and
Thomas Barker, our executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Inven-
tion for "IMPROVEMENTS IN WAREHOUSE HOISTS OR CRANES," upon the con

page_text: dition (amongst others) that we, the said John Barker, James Barker,
and Thomas Barker, our executors or administrators, by an instrument
in writing under our, or their, or one of our or their hands and
seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that we, the said John Barker, James Barker,
and Thomas Barker, do hereby declare the nature of our said In-
vention, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following state-
ment (that is to say) :—
This Invention consists in certain improvements in the hoists or cranes
for which former Letters Patent were granted to the within-named John'
Barker on the 5th day of February 1875, Number 432.
And in order that our Invention may be fully understood and readily
carried into operation we will proceed to describe the accompanying Sheet
of Drawings, reference being had to the figures and letters marked
thereon.
Fig. 1 is an elevation, and Fig. 2 a plan of our improved warehouse
hoist or crane, which is particularly adapted for hoisting bales of cotton
into warehouses, but which may be applied to other purposes.
b
The improved hoist or crane consists of the large pulley a, which is
driven by the friction pulley 6 keyed on the driving shaft 6'. The large
pulleya is keyed on the shaft a¹, one end of which revolves in a bearing
connected to the framing c, and the other end revolves in a bearing
fixed to the end of the long lever d. To the shaft a' is also fixed the
barrel a for the hoisting cord or chain e. The beam g may be placed
horizontally, as shewn, or diagonally as shewn in the Specification of
John Barker's Patent above referred to. The large pulley a is held in
contact with the friction pulley b by the long lever d, the end of which
is raised and allowed to drop by means of the chain h, one end of which
is connected to the long lever, and the other end to the lever i fixed to
the upright shaft i, at the lower end of which is a bush for the
fulcrum of the hand lever ², which can be moved horizontally to and

page_text: fro to connect or disconnect the large pulley a and friction pulley b, and
vertically up and down to slacken or tighten the chain j, the other end
of which is connected to the lever k, the object of which will be
explained hereafter. Upon the driving shaft b' is also fixed the smaller
friction pulley 62, which communicates motion when required to the
pulley on the shaft 1, one end of which revolves in a fixed bearing and
the other in a bearing fixed to the lever k.
The parts above enumerated are made as usual, or in the manner
described in the Specification of John Barker's Patent above referred to.
· Our improvements consist in making the carriage f of the hoist or
crane with two pairs of guide rollers f¹ running on a horizontal or
inclined beam g, and with two guide pulleys f* for the lifting chain or
rope e, which passes under a snatch block f³ between the guide
pulleys. The lifting chain or rope e is wound on the barrel a³ as
usual. The carriage is moved to and fro along the beam g by the
chain m passing over the toothed pulley on the shaft P, which is
turned round alternately in contrary directions by the friction pulley /
and the small driving pulley 62 on the driving shaft b'. The friction
belt 6 passes over the friction pulley and the driving pulley b³.
When the carriage f is stationary the pulley is out of contact with
the pulley 68, and the belt 6' is slack, consequently no motion is imparted
to the toothed pulley & and chain m, the ends of which are connected to
opposite ends of the carriage, as shewn in Fig. 1. When the carriage
has to be drawn in the attendant lowers the outer end of the lever k by
depressing the hand lever 2, to which is connected the second chain j',
which after passing over suitable guide pulleys is secured to the lever k.
This lowering of the lever k causes the pulley to bind against the
inside of the belt b, which then turns the toothed pulley in the
direction of the dotted arrow, and consequently moves the carriage
inwards, but when the carriage has to be drawn out the attendant lifts
the hand lever to raise the end of the lever k by the chain j, which
brings the pulley in contact with the pulley 6, thereby causing
the toothed pulley to revolve in the direction of the full arrow, see
Fig. 1.
A similar reversing motion may be produced by the arrangement of
pulleys shewn in Fig. 3. In this case the small pulley on the shaft b
drives by a crossed strap the pulley 65 in the opposite direction, and as
the friction pulley 1 is brought in contact with either of the pulleys 6*

page_text: or 6 it moves the carriage either outwards or
required.
inwards as may be
The mode of operation is as follows, and the Drawing shews the parts
in the positions they occupy when the pulleys a and b are in contact,
and the pulleys 6' and are out of contact:-The bale suspended to the
cord or chain e is supposed to be gradually ascending, and when the bale
has arrived at the desired height the attendant by lowering the end of
the lever & brings the pulley a against the break a³. The attendant
then raises the end of the lever k to bring the pulley in contact with
the pulley 6 to move the carriage inwards until the bale has advanced
sufficiently into the warehouse. The attendant then raises the hand
lever to stop the carriage, and moves it horizontally to lower the end
of the long lever d, which then draws the large pulley a out of contact
with the break a², to allow the bale to be lowered on to the floor of the
warehouse or on to a truck. The carriage is then at liberty to be taken
back to the outer end of the beam g.
Having thus stated the nature of our Invention, and described the
manner of performing the same, we wish it to be understood that we do
not intend to limit ourselves to the details given, as the same may be
varied or modified, and we claim,-
First. The general combination and arrangement of the parts forming
an improved warehouse hoist or crane, as shewn and described.
Secondly. The improved mode of constructing the carriage f, and
the modes of traversing it to and fro on the beam g, as shewn and
described.
And, Thirdly. The improved mode of connecting the hand lever to
the lever k, as shewn and described.
In witness whereof, we, the said John Barker and James Barker,
for ourselves and on behalf of the said Thomas Barker, have
hereto set our hands and seals, this Thirtieth day of May, One
thousand eight hundred and seventy-six.