IMPROVEMENTS IN TRAVELLING CATHEAD HOIST APPARATUS
Year: 1884

page_text: We
JAMES FORMBY and CHARLES KEIZER of No 18 Regents Road Liverpool in
the County of Lancaster, Engineers, do hereby declare the nature of our said,
invention for "IMPROVEMENTS IN TRAVELLING CATHEAD HOIST APPARATUS" to be
as follows:
The invention relates mainly to warehouse and like hoists where the raising and
lowering chain band or rope is carried over a pulley or sheave in a travelling
cathead, that is to say a cathead which can be moved at will so as to project less
or more beyond the face of the building say over the foot walk or be drawn into
or within the warehouse door.
The object is to provide simple, durable, and efficient apparatus for giving the
desired outwards or inwards travelling motion to the cathead and also for operating
the hoist so as to raise or lower a load or weight.
The cathead is carried in guides in any usual or convenient manner and is
provided with a nut through which there passes a screwed shaft. The said screwed.
shaft is carried in fixed bearings and is fitted at the free end with a toothed or
friction bevel wheel. The said toothed or friction bevel wheel geared with two
other bevel wheels carried at right angles thereto on a driving shaft. The said two
bevelled wheels fit freely on the driving shaft and are provided with friction cones
or their equivalents. The driving shaft carries a friction clutch free to slide
thereon so as to engage with the cones of one or other of the wheels above
mentioned.
The said friction clutch is for the purpose of reversing connected to a lever
jointed at one end to any suitable part of the apparatus and fitted at the other end
with nut screw and rope band or chain wheel mechanism, the latter for imparting
motion in the required direction.
The action of the apparatus is as follows:-Motion being given to the wheel by
hand or preferably by means of a rope cord or chain; the lever is screwed-in öne
direction or the other carrying with it the friction clutch and causing it to engage
in one or other of the cones. The cone and wheel to which it belongs receive
motion from the driving shaft through the clutch and impart the motion so received
to the bevel wheel on the_cathead screw which latter causes the cathead to travel
out or in according as the friction clutch is made to gear with one or other of the
wheels above mentioned.
Combined with the travelling cathead is a hoist or crane of any usual or suitable
construction and clutch and bevel gear such as is above described is advantageously
used for actuating the same.

page_text: "
We JAMES FORMBY and CHARLES KEIZER of N° 18 Regent Road Liverpool in
the County of Lancaster Engineers, do hereby declare the nature of the said
invention for IMPROVEMENTS IN TRAVELLING CATHEAD HOIST APPARATUS and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
:-
The invention relates mainly to warehouse and like hoists where the raising and
lowering chain band or rope is carried over a pulley or sheave in a travelling
cathead that is to say a cathead which can be moved at will so as to project less or
more beyond the face of the building say over the foot walk or be drawn into or
within the warehouse door.
The object is to provide simple durable and efficient apparatus for giving the
desired outwards or inwards travelling motion to the cathead and also for operating
the hoist so as to raise or lower a load or weight.
The cathead is carried in guides in any usual or convenient manner and is
provided with a nut through which there passes a screwed shaft. The said
screwed shaft is carried in fixed bearings and is fitted at the free end with a
toothed or friction bevel wheel. The said toothed or friction bevel wheel is geared
with two other bevel wheels carried at right angles thereto on a driving shaft.
The said two bevelled wheels fit freely on the driving shaft and are provided with
friction cones or their equivalents. The driving shaft carries a friction clutch free
to slide thereon so as to engage with the cones of one or other of the wheels above
mentioned.
The said friction clutch is for the purpose of reversing connected to a lever
jointed at one end to any suitable part of the apparatus and fitted at the other end
with nut screw and rope band or chain wheel mechanism the latter for imparting
motion in the required direction.
. DESCRIPTION OF THE DRAWINGS,
Fig 1 is a plan, and fig 2 a side elevation of travelling cathead apparatus under
our invention, a floor, b bearings for cathead, c cathead, d nut or cathead, e screwed
shaft. The said shaft takes into the nut d is carried in bearings f and is fitted at
one end with the toothed bevel wheel g. The said wheel g gears with wheels hi
loose on the driving shaft ; carried in bearings k, 1 friction clutch revolving with
the shaft and capable of being moved by the lever m so as to engage with one or
other of the cones or their equivalents n. o. on the wheels hi, p rope attached to
the lever m, and passing round pulleys q to any suitable position where they may
be operated by the attendant.
Instead of attaching the ropes direct to the lever m they may pass round a
pulley on a shaft r as shown in fig 3. The shaft r being carried in suitable bearings.
and provided with a screwed portions on which a nut t attached to the lever m
works.
The various parts of the apparatus above described are of any usual or suitable
construction the general arrangement and combination being the essence of the
invention

page_text: With travelling cathead apparatus constructed substantially as above set forth
a hoist or crane of any usual or suitable construction is combined and clutch or
bevel gear is used advantageously to control the motions thereof in the usual or in
any desired way.
.
The action of the apparatus is as follows:-The rope p is pulled by the attendant
so as to bring the clutch into contact with one of the cones no or its equivalent
and one of the wheels hi is caused to revolve so as to give motion in the desired
direction to the wheel g and screwed shaft e. The said screwed shaft e acts on the
nut & secured to the cathead c and causes it to move inwards or outwards as
required. Continuous rotary motion is given to the shaft ; by any suitable motor.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is
First. The combination and arrangement in travelling cathead apparatus of the
various parts substantially as herein set forth.
Second. The combination and arrangement of the travelling cathead c bearings b.
nut screwed shaft e toothed wheels g h i, shaft j, friction clutch l, cones or their
equivalents n o and lever m substantially as herein set forth.
Third. The combination with travelling cathead apparatus under our invention
of a hoist or crane substantially as herein set forth.