Improvements in Hydraulic Jacks, Applicable to Forcing the Coupling Bolts out of Marine Engine, Propeller, and other Shafting and the like Purposes.
Year: 1887

page_text: Date of Application, 19th Nov., 1887
Complete Specification Left, 18th Aug., 1888
Complete Specification Accepted, 21st Sept., 1888
Improvements in Hydraulic Jacks, Applicable to Forcing the
Coupling Bolts out of Marine Engine, Propeller, and other
Shafting and the like Purposes.
I ALBERT EDWARD SEATON, of Wilton House, Holderness Road, Hull, in the
County of York, Civil and Mechanical Engineer and Naval Architect, do hereby
declare the nature of my said Invention for "IMPROVEMENTS IN HYDRAULIC JACKS,
APPLICABLE TO FORCING THE COUPLING BOLTS OUT OF MARINE ENGINE, PROPELLER
AND OTHER SHAFTING AND THE LIKE PURPOSES," to be as follows :―
The object of my Invention is to provide an effective portable appliance for forcing
the Bolts out of the Couplings of Marine Engine, propeller or other shafting, or for
other similar purposes, thereby avoiding the delay, expense and injury to the Couplings
and bolts which is sometimes caused by the means ordinarily employed.
I construct my improved forcing jack in form somewhat resembling a Hydraulic
punch bear or rivetter, the head being fitted with a Hydraulic ram, power pump, valves
and other necessary appliances and fittings similar to those usually employed in
Hydraulic jacks, punching bears and the like Hydraulic Implements, and so far as
this part of my improved appliance is concerned I lay no claim as to novelty.
The head of my improved jack which contains the ram, forms one end of what may
be called the Jaw, and corresponds to the punch or ram end of a Hydraulic punch
bear, or rivetter, the other end of the Jaw which corresponds to the die end of a
punching bear or rivetter, and which for convenience I will call the claw end, is made
with a semicircular opening large enough to allow of the head of a Bolt to clear when
being forced out of the Coupling, sufficient surface being provided round the opening
of this end of the Jack to give a good hold or bearing on both sides of the head of the
Bolt during the operation. The Jaw of my improved Jack from the head or ram end
to the claw end is made long enough and deep enough to span both flanges of the
coupling and the nut end of the bolt when in position, so that the centre of the ram
and the centre of the space at the claw end may be in line with the centre of the bolt ;
thus when the Jack is properly adjusted into position and pressure is applied to the

page_text: ram by means of the pump, the end of the ram which is suitably formed for the
purpose is forced against the end of the Bolt, which as the pressure increases is forced
out of the coupling; the resistance to the ram being received by the claw end of the
Jack, which as before stated is fixed at the opposite side of the coupling.
The body or frame of my improved Jack with the ram cylinder and pump case may
be constructed in one casting, either in Steel or other suitable Metal, the form of the
frame being so designed as to combine lightness with strength.
For the convenience of moving the Jack about and fixing it into position, a loop or
shackle may be so placed in the frame that when the Jack is suspended it will hang
horizontally, or in any other position which may be found convenient.
The essential feature of my invention consists in the application of a suitably formed
Hydraulic Jack for forcing coupling Bolts out of Marine Engine, propeller and other
shafting and the like purposes.
R. HEBER RADFORD,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Hydraulic Jacks, Applicable to Forcing the
Coupling Bolts out of Marine Engine, Propeller, and other
Shafting and the like Purposes.
I, ALBERT EDWARD SEATON, of Wilton House, Holderness Road, Hull, in the
County of York, Civil and Mechanical Engineer and Naval Architect, do hereby
declare the nature of my said Invention for "IMPROVEMENTS IN HYDRAULIC JACKS,
APPLICABLE TO FORCING THE COUPLING BOLTS OUT OF MARINE ENGINE, PROPELLER AND
OTHER SHAFTING AND THE LIKE PURPOSES," and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement
The object of my Invention is to provide an effective portable appliance for forcing
the bolts out of the couplings of Marine Engine, propeller or other shafting, or for
other similar purposes, thereby avoiding the delay, expense and injury to the couplings
and bolts which is sometimes caused by the means ordinarily employed.
.I construct my improved forcing Jack in form somewhat resembling a Hydraulic
punch bear or rivetter, the head being fitted with Hydraulic ram, power pump, valves.
and other necessary appliances and fittings, similar to those usually employed in
Hydraulic Jacks, Punching bears, and the like Hydraulic Implements, and so far as
this part of my improved appliance is concerned, I lay no claim as to novelty.
The head of my improved jack which contains the ram, forms one end of what may
be called the jaw, and corresponds to the punch or ram end of a Hydraulic punch, bear
or rivetter; the other end of the jaw which corresponds to the die end of a punching

page_text: bear or rivetter, and which for convenience I will call the claw end, is made with a
semicircular opening large enough to allow of the head of a bolt to clear when being
forced out of the coupling, sufficient surface being provided round the opening of this
end of the Jack to give a good hold or bearing on both sides of the head of the bolt
during the operation.
The jaw of my improved Jack, from the head or ram end, to the claw end, is made
long enough and deep enough to span both flanges of the coupling and the nut end of
the bolt when in position, so that the centre of the ram and the centre of the space at
the claw end may be in line with the centre of the bolt; thus when the Jack is
properly adjusted into position and pressure is applied to the ram by means of the
pump, the end of the ram which is suitably formed for the purpose is forced against
the end of the bolt, which as the pressure increases is forced out of the coupling; the
resistance to the ram being received by the claw end of the jack which as before
stated is fixed at the opposite side of the coupling.
The body or frame of my improved Jack with the ram, cylinder and pump case,
may be constructed in one or more parts either in Steel or other suitable metal, the
form of the frame being so designed as to combine lightness with strength.
For the convenience of moving the Jack about and fixing it into position, a loop or
shackle may be so placed in the frame that when the Jack is suspended, it will hang
horizontally or in any other position which may be found convenient.
The essential feature of my invention consists in the application of a suitably formed
Hydraulic Jack for forcing Coupling bolts out of Marine Engine, propeller and other
shafting and the like purposes.
Although the Jack herein described is more particularly designed for forcing bolts,
its usefulness is by no means restricted to such purposes, as by using a bolt or bar so
as to extend the action of the ram beyond the claw end of the Jack, it can be at once
used as a lifting Jack, and in some cases for the greater convenience of such a com-
bination of uses, a specially adapted appliance or appliances can be supplied with the
Jack, by means of which my improved forcing Jack can be readily converted into a
lifting Jack.
The nature of my invention will be better understood on reference to the accompany-
ing two sheets of drawings, in which ;-
Sheet 1, represents a bolt forcing Jack, and
Sheet 2, represents a combined bolt forcing and lifting Jack.
Fig. 1, Sheet 1, represents a bolt forcing Jack placed in position for forcing a
bolt out of a shaft coupling-the claw end being in section.
Fig. 2, Sheet 1, is a section through the frame of the Jack looking towards the
claw end of the same.
Fig. 3 Sheet 1, is a section of the head or ram end of the Jack.
Fig. 4, Sheet 2, represents the bolt forcing Jack converted into a lifting Jack by
means of a specially adapted appliance or appliances.
Fig. 5 Sheet 2, is a section through the frame of the jack so converted, looking
towards the claw end.
Figs. 6, 7, 8 & 9, Sheet 2, represent the specially adapted appliance or appliances
herein-before referred to for converting the bolt forcing jack into a lifting jack.
The same letters refer to similar parts throughout the several views.
a, is the frame of the Jack.
b, is the claw end of the same.
C,
is the ram or head end of the Jack.
d, is the ram.
e, is a hole in the frame of the Jack for a lifting shackle, pin or bolt.
ff, represent a shaft Coupling in section.
g, represents a coupling Bolt.
h, is a specially adapted appliance in the form of a bolt.
i, is a bush or liner by means of which the bolt h, may be guided in the claw end
of the Jack.
j, being a pin by means of which the bushi is kept in position.

page_text: As a further modification, in lieu of the specially adapted appliance herein described
as a bush or liner and illustrated in Figs. 8 and 9, the specially adapted appliance
in the form of a bolt illustrated in Fig. 6 may have the stalk or shank increased in
size at its lower end to fit the opening in the claw end of the jack and in lieu of a
pin for retaining it in position a rib or ribs, or groove or grooves may be formed on
either or both of the parts so fitted to each other, that when the bolt, h, is inserted
endways into the claw end of the Jack it can only slip out in one direction, viz. :-
that in which it is inserted.
Having now particularly described and ascertained the nature of my Invention and
in what manner the same is to be performed, I declare that what I claim is
(1) The arrangement and combination of parts comprising a suitably formed
Hydraulic Jack applicable to forcing the coupling bolts out of Marine Engine,
propeller and other shafting and the like purposes substantially as herein
described and illustrated in Figs. 1, 2, and 3 of the accompanying first sheet of
drawings.
(2) The arrangement and combination of parts comprising a suitably formed
Hydraulic Jack applicable to forcing the coupling bolts out of Marine Engine,
propeller and other shafting and the like purposes and the specially adapted
appliance or appliances by means of which it may be converted into a lifting Jack
substantially as herein described and illustrated in Figs. 4, 5, 6, 7 8 and 9 of the
accompanying second sheet of Drawings.
(3) Improvements in Hydraulic Forcing and Lifting Jacks in the manner and for
the purposes substantially as hereinbefore described and illustrated.
Dated this 17th day of August 1888
R. HEBER RADFORD,
Agent for the Applicant.