Improvements in Cranes.
Year: 1891

page_text: Date of Application, 5th Oct., 1891
Complete Specification Left, 5th July, 1892-Accepted, 24th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in Cranes.
I ALFRED DOUGILL of Great Georges Street Leeds in the County of York
Engineer do hereby declare the nature of this invention to be as follows:-
My invention consists in a special arrangement of mechanism and means for
carrying the same, suitable for warehouse and shop cranes.
Such a crane constructed in accordance with my invention consists of a barrel
and moveable pulley arrangement for hoisting and lowering, and a rope or chain
and pulleys for traversing in and out the hoisting carriage.
My improved arrangement consists in suspending the framework of the crane
from a circular track, which latter is carried from the roof of the warehouse room.
This track is provided with a fixed circular rack, into which a pinion wheel carried
from a bracket or socket in the framework of the crane gears. The rotation of the
pinion causes the rotation of the crane framework and jib. The jib in my arrange-
ment for roof cranes is horizontal, and passes through the crane framework, so as
to enable a balance weight to be attached at one end. This is for the purpose of
ensuring a vertical or approximately vertical pull on the support carrying the
framework.
Such support may conveniently be in the form of a short cylinder with a flange
or brackets at the upper end for attachment to the roof, and having also a flange or
brackets at the lower end on which the circular track is fitted. Rollers or runners
attached to upwardly projecting brackets or portions of the framework casting
carry the crane suspended from the circular track.
A centre vertical shaft passes through the floor or roof down to a socket in the
framework of the crane. This shaft is the first motion shaft, and is usually kept
continuously revolving, and by means of a bevel wheel on this shaft, imparts motion
through the intervention of friction gearing for hoisting and lowering, traversing in
and out, and slewing round.
This my improved arrangement is specially suited for warehouses, or other
buildings, where it is of advantage to have a separate crane for each storey, as they
can then all be driven independently from one common first motion vertical shaft.
Dated this 3rd day of October
1891
J. CLAKK JEFFERSON, A.R.S.M.,
2, East Parade, Leeds, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Oranes.
I ALFRED DOUGILL of Great Georges Street, Leeds, in the County of York
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 consists in a special arrangement of mechanism and means for
carrying the same, suitable for warehouse and shop cranes.
Such a crane constructed in accordance with my invention consists of a barrel
and moveable pulley arrangement for hoisting and lowering, and a rope or chain
and pulleys for traversing in and out the hoisting carriage.
My improved arrangement consists in suspending the framework of the crane
from a circular track, which latter is carried from the roof of the warehouse room.
This track is provided with a fixed circular rack into which a pinion wheel, carried
TD037

page_text: from a bracket or socket in the framework of the crane, gears. The rotation of the
pinion causes the rotation of the crane framework and jib. The jib in my arrange-
ment for roof cranes is horizontal, and passes through the crane framework, so as
to enable a balance weight to be attached at one end. This is for the purpose of
ensuring a vertical or approximately vertical pull on the support carrying the
framework.
Such support may conveniently be in the form of a short cylinder with a flange
or brackets at the upper end for attachment to the roof, and having also a flange or
brackets at the lower end on which the circular track is fitted. Rollers or runners
attached to upwardly projecting brackets or portions of the framework casting
carry the crane suspended from the circular track.
A centre vertical shaft passes through the floor or roof down to a socket in the
framework of the crane. This shaft is the first motion shaft, and is usually kept
continuously revolving, and by means of a bevel wheel on this shaft imparts motion
through the intervention of friction gearing for hoisting and lowering, traversing in
and out, and slewing round.
This my improved arrangement is specially suited for warehouses or other
buildings, where it is of advantage to have a separate crane for each storey; as
they can then all be driven from one common first motion vertical shaft.
And in order that my invention and the manner in which the same is or may
be performed may be more readily and clearly understood, reference is given to
the accompanying sheets of drawings of which :-
Figs. 1 and 2 are opposite side (perspective) views looking upwards at a
warehouse crane constructed in accordance with my invention. Fig. 3 is a cross
section.
In all the figures the same reference letter refers to the same part. The crane
is supposed to be attached to the roof of the warehouse room.
с
a a is the box framework of the crane which is carried by brackets 66 from the
circular track c. The track c is formed as an internal ledge, on which the rollers
attached to the upper ends of the brackets bb run. The track e is preferably fitted
or cast at the lower end of the short cylinder d, the latter being carried from the
roof by the brackets e, attached to or formed as part of the cylinder d; or the
latter may for the same purpose be formed with a flange at its upper end.
The jib is carried in a horizontal position, preferably from the upper part of
the box framework a, through which it passes, so that a balance weight g may be
fixed at the opposite end. The central vertical shaft is fitted in a socket in the
lower part of the framework a, and its upper end in a socket in the roof, (or floor
of the room above) or in a socket formed within and attached to the cylinder d.
This shaft is the first motion shaft of the crane, and is intended to be kept con-
tinuously revolving. As shewn in the drawings it is intended to be driven by belt
gearing from the horizontal shaft a. It may however be arranged to pass upwards
through the roof and the rooms above and downwards through the floor and through
the rooms below. The arrangement shewn in the drawings permits of two or more
cranes in one room being operated from the line shaft a, and has the advantage
that the floor space below the crane is left free.
By means of the bevel wheels ij motion is imparted to the horizontal shaft k.
By means of friction wheels on this shaft gearing with wheels on the shafts l. m, the
hoisting and lowering, and traversing in and out operations are effected.
The slewing operation is effected in either direction by means of the 3 bevel
wheels (preferably friction wheels), n on the shaft k, and o. p, on the shaft r, with
the worin s on the shaft r, and the worm wheel t on the shaft u, the shaft u carrying
at is upper end a pinion gearing with the rack w attached to the above mentioned
circular track c.
The levers serve to put the hoisting and lowering, traversing in and out and
slewing mechanism into gear; but for high rooms it will be more convenient to
effect this by means of light chains and levers.
The framework a with the mechanism and the iib f which it carries, may be

page_text: mounted on a fixed vertical pillar, to which latter the track c and the rack w would
be attached, the central vertical shaft passing down the centre of the pillar.
A second circular track y carried from the roof of the warehouse room may be
provided concentric with the first, on which runs a roller or pair of rollers attached
to the bracket, the lower end of the bracket z being attached to the jib f. This
arrangement serves to take off the side strains on the framework and its supports.
I wish it to be understood that I do not limit myself to, nor do I claim many of
the details herein described and shewn, but
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
1st. A crane consisting of a horizontal jib, attached to a framework carrying the
mechanism for the hoisting and lowering, the traversing in and out, and slewing
operations, such framework being carried from and revolvable about a cylindrical
support, attached to the roof of the room, such support being provided with a
circular track and rack and through the centre of which the first motion shaft for
actuating the crane mechanism passes.
2nd. The arrangement and combination of the framework a carrying the jib and
the mechanism for the hoisting and lowering traversing in and out and slewing
operations with the cylindrical support d (for attachment to the roof of the room)
provided with the circular track-the brackets bb with rollers at their upper ends
for carrying the framework from and rotable about the circular track-and the
centre vertical shaft h, all with or without the auxiliary track or support y and
bracket z.
3rd. My improved crane for attachment to the roofs of warehouse rooms
constructed substantially according to Claims 1 and 2 as herein set forth and
illustrated.
Daucu
avcu 18 400 un
100
J. CLARK JEFFERSON,
2, East Parade, Leeds, Agent for Applicant.
BOY ATE TO
J. CLARK JEFFERSON,
2, East Parade, Leeds, Agent for Applicant.