Improvements in Pulley Blocks, Snatch Blocks, or Bearings for Travelling or Running Chains, Ropes, Wires, or Rods.
Year: 1889

page_text: Date of Application, 25th Feb., 1889
Complete Specification Left, 25th Nov., 1889-Accepted, 4th Jan., 1890
PROVISIONAL SPECIFICATION.
Improvements in Pulley Blocks, Snatch Blocks, or Bearings for
Travelling or Running Chains, Ropes, Wires, or Rods.
I, THOMAS DEER of the Ship Inn, Seacombe Ferry, in the County of Chester,
Model Maker and Engineer, do hereby declare the nature of this invention to be as
follows ==
This invention has for its object the bearing of a rope or other line, whether in a
pulley block hawse hole or in any other mechanism so that the rope can travel in any
direction within very wide limits and yet the surface of the bearing where it touches
it shall travel at substantially the same speed. I form the bearing of a series of
pulleys radiating from the centre of the bearing having their working edges or faces
curved so as to make a perfect circle on the central transverse plane of the pulley.
To allow for wear the pulleys are all made by preference broader than their proper
share of the circumference of the central hole on the central transverse plane and are
turned down or bevelled off radially to the main centre line till they each only have
their proper and equal width of working face. Each pulley has an axis on bearings
in the main bracket. This latter is split in the plane of these bearings and formed
in two halves, one half being the bearing, the other the cap preferably fitting into a
socket or recess in the other half on one side and bolted to the said other half on the
other side, or it may be fixed with bolts or screws, wedge catches or equivalent
mechanism all round.
Both halves, however, have a segment containing one pulley at least cut out of
them and this piece with its containing pulley is hinged and fixed in position with a
catch in such manner that it can at a moments notice be swung out clear, so as to
allow of the insertion of the rope sidewise. This is not an absolute necessity and in
the case of hawse holes and other cases where the rope end or chain end must always
be passed through, it is better not to have a hinged segment.
Dated this 23rd day of February 1889.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Pulley Blocks, Snatch Blocks, or Bearings for
Travelling or Running Chains, Ropes, Wires, or Rods.
I, THOMAS DEER of the Ship Inn, Seacombe Ferry, in the County of Chester,
Model Maker and 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 has for its object the bearing or supporting of a rope or other line-
whether in a pulley block, hawse-hole, or in any other device-in such a manner that
the rope or its equivalent can travel from or to such support at any angle within very
wide limits, and yet the surface of the bearing, where the rope touches it, shall travel
at substantially the same speed as the rope.
The way in which I carry my invention into effect may be understood by the
accompanying drawing, in which :-
:-
Figure 1 is a front elevation of a fixed bearing bracket constructed in accordance
with my invention, the bearing being opened to admit of the introduction of
a rope.
Figure 2 is a vertical section on line x x Figure 3

page_text: Figure 3 a view similar to Figure 1, the front cap being removed and the bearing
shown in its closed position.
Figure 4 shows a slight modification.
I form the bearing of a series of pulleys A, radiating from the centre of the
bearing and having their working edges or faces a curved so as to make a perfect.
circle on the central transverse plane of the bearing bracket B. To allow for wear,
the pulleys are all made, by preference, broader than their proper share of the
circumference of the central hole on the central transverse plane, and are then turned
down or bevelled off radially to the main centre line, as at a', Figure 4, till they each
only have their proper and equal width of working face.
Each pulley has an axis a² on bearings in the bracket B. This latter is split in the
plane of these bearings, as at b, and is formed in two halves, one half being the
bracket proper, and the other half 62 being the cap. The latter may fit into a socket
or recess in one side of the bracket proper and may be bolted to the said bracket on
the other side, or it may be fixed with bolts or screws 63, as shown, said screws being
placed at convenient positions all round the bearing. Or wedge catches or equivalent
mechanism may be employed.
The combined bracket proper and cap have a segment C, carrying at least one
pulley A, made movable or detachable-in the drawing this segment is shown with
three pulleys. This segment, with its containing pulley or pulleys, is hinged as at c¹,
in such manner that it can be swung out clear of the rest of the bracket, as shown
in Figure 1, so as to allow of the insertion of the rope D sidewise. The segment is
held in position by any suitable catch, preferably one which will admit of being
unfastened at moment's notice. In the arrangement shown on the drawing, this
catch consists of a link E, hinged to the periphery of the bracket proper as at e, and
adapted to fit between two lugs EI E' on the periphery of the segment C. A pin e¹
is passed through both lugs and link, the said pin being by preference secured to the
bracket or segment by a short chain or cord e."
The segment C is not an absolute necessity, and, in the case of hawse holes and in
other cases where the rope end or chain end must always be passed through the bearing,
it is better not to have a hinged segment.
If thought desirable, the segment C may be hinged in such a manner as to be
swung out in a plane parallel to the axis of the bearing, instead of in one transverse
to said axis as shown. Or it may be made movable or detachable in any convenient
manner not herein specified..
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. A bearing or pulley device for running gear, in which a series of pulleys,
arranged radially round a common axis and capable of rotation in planes approximately
radial to said axis, have the inner portions of their peripheries so located as to form
a continuous movable bearing surface round said axis, substantially as and for the
purpose described.
2. An improved bearing or pulley device for running gear consisting of a series of
pulleys arranged radially as described about a common axis, a suitable frame or
bracket supporting said pulleys and having a portion-containing one or more of the
pulleys capable of being moved aside or detached from the rest, and means for
securing such movable or detachable portion in position, substantially as and for the
purposes described.
3. The improved bearing bracket for running gear constructed as a whole
substantially as herein.described and shown, and for the purposes specified.
Dated this 23rd day of November 1880
WM. P. THOMPSON & Co.,
Liverpool, Manchester, and London, Patent Agents.