Improvements in Screw Grips for Rope Haulage.
Year: 1893

page_text: Date of Application, 27th May, 1893
Complete Specification Left, 27th Feb., 1894-Accepted, 31st Mar., 1894
PROVISIONAL SPECIFICATION.
Improvements in Screw Grips for Rope Haulage.
I, WILLIAM SALTER PARKES, of Excelsior Works, Wisemore, Walsall,
Staffordshire, Manufacturer of Screw Grips for Endless Rope Haulage, do hereby
declare the nature of this invention to be as follows :—
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This invention has reference to what are known as screw grips" which are used
with endless wire rope haulage in collieries and other places for connecting the
waggons or tubs to the endless wire ropes.
A well known construction of screw grip consists essentially of two jaws,
namely a bottom jaw and a top jaw, adapted to grip the wire rope between
them the top or sliding jaw being provided with a screw by turning which the
jaws can be forced together to grip the rope or moved apart to release the same.
My invention consists of the hereindescribed improved construction of the said
screw grips whereby they are rendered stronger and more lasting in wear and the
sliding jaw is effectually prevented from getting askew with the bottom jaw which
is a defect in some other screw grips when they are somewhat worn.
In carrying out my invention the bottom jaw has the usual upwardly projecting
stem or arm the top of which has as usual a lug in which works the said screw for
operating the sliding jaw which latter is situated between the bottom jaw and the
said lug. I make the said stem or arm by preference parallel and I form a vertical
slot or hole in the sliding jaw in which slot or hole the said stem fits so that the
stem is embraced by the jaw which latter sliding upon the stem or arm cannot
possibly get out of position.
The sliding jaw is by preference made of malleable cast iron or other ductile
metal with the said slot or hole wide enough open to admit the said stem which is
introduced into the slot or hole and then the two portions of the sliding jaw
are closed together thus securing the sliding jaw and stem together. There are
eyes formed on the sliding jaw, as nearly as possible in a line with the centre
of the wire rope, for the attachment of the link which connects the screw grip to
the tub or waggon.
Dated this 26th day of May 1893.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Screw Grips for Rope Haulage.
1, WILLIAM SALTER PARKES, of Excelsior Works, Wisemore, Walsall,
Staffordshire, Manufacturer of Screw Grips for Endless Rope Haulage, 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 reference to what are known as "screw grips" which are used
with endless wire rope haulage in collieries and other places for connecting the
waggons or tubs to the endless wire ropes.
A well known construction of screw grip consists essentially of two jaws

page_text: namely a bottom jaw and a top jaw, adapted to grip the wire rope between
them the top or sliding jaw being provided with a screw by turning which the
jaws can be forced together to grip the rope or moved apart to release the same.
My invention consists of the hereindescribed improved construction of the said
screw grips whereby they are rendered stronger and more lasting in wear and the
sliding jaw is effectually prevented from getting askew with the bottom jaw which
is a defect in some other screw grips when they are somewhat worn.
On the acompanying drawings Fig. 1 represents in front elevation a screw grip
for rope haulage constructed according to this invention as attached to the link
which connects the screw grip to the tub or waggon; Fig. 2 is a sectional plan
of the same on line X X of Fig. 1; Fig. 3 is an end view of the saine, and
Fig. 4 is a plan of the sliding jaw of the same shewing the form in which the said
sliding jaw is cast.
The same letters of reference indicate the same or corresponding parts in all the
figures of the drawing.
In the kind of screw grips to which my invention applies the bottom jaw A¹ of
the screw grip has formed with it the usual upwardly projecting stem or arm A³
which is made parallel for the sliding jaw C (hereinafter described) to slide upon,
and the top of the stem is made with the usual lug A³ in which works the ordinary
screw B for operating the sliding jaw C which is between the jaw A¹ and the
lug A³. The screw B is made as usual with a wince handle by which the screw
can be turned.
According to this invention I make the sliding jaw C with the vertical hole or
slot of rectangular or other angular form corresponding with the stem A' on
which the jaw C slides so that the stem is embraced by the sliding jaw C and the
sliding jaw C cannot possibly get askew with the bottom jaw A'. The sliding
jaw C is by preference made of malleable cast iron or other ductile metal and in
order to get this sliding Jaw on to the stem A2 the sliding jaw has to be cast or
formed as shewn in Fig. + with the slot or hole e' open wide enough to admit the
stem A thus partly dividing the sliding jaw C into two portions one of the eyes c³
for the connecting link F being formed with one portion of the sliding jaw C and
the other eye being formed with the other portion of the same. When the
stem A has been introduced into the hole or slot e¹ the two portions cc of the
sliding jaw C are closed together at the sides of the connecting link F as shewn by
Fig. 2 and there secured by the joint pin G which passes through the eyes cand
end of the link F the ends of the pin G being rivetted over to secure the same in
place. The eyes cc which are formed on the sliding jaw Care (when the grip
is viewed in plan) as nearly as possible in a line with the centre of the wire rope,
see Figs. 2 and 3, and the link F is connected to the sliding jaw C near to the
rope D so that the pull on the link F does not tend to bend the rope as is the case
in those grips where the link F is connected to the grip at one side of the rope or
near the top of the grip.
The jaws A¹ and Care respectively grooved at a and c as usual to grip the
wire rope D. The lower end of the screw B is connected to the sliding jaw C
which may be done in the usual way by the end 62 of the screw B passing through
the hole in the sliding jaw C down into the lower recess c where there is a
cotter pin e passed transversely through the end ² of the screw B.
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. In a screw grip of the kind herein referred to for rope haulage and in com-
bination with the lower jaw thereof made with an upright angular stem provided
with a top lug through which is screwed the screw for operating the upper sliding
jaw, making the upper sliding jaw surround and embrace the said angular stem so
as to slide thereon and prevent the upper jaw getting askew with the lower jaw,
said upper jaw being jointed to the connecting link and connected to the said screw

page_text: so that by turning this screw in one or the other direction the jaws will grip or
release the rope substantially as set forth.
2. In a screw grip for rope haulage the combination of the bottom jaw A' made
with the upright angular stem A³ and side lug A³, the screw B screwed into the
lug A', the sliding jaw C surrounding and embracing the vertical angular stem A³
and connected to the screw B and to the draw link F the said parts being con-
structed arranged and combined together for the purposes and substantially as
herein before described and illustrated by the accompanying drawing.
Dated this 26th day of February 1894.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.