Improvements in or connected with Apparatus for the Erection of Wharfs, Bridges, or other Permanent Structures of Concrete or other analogous material.
Year: 1891

page_text: Date of Application; 8th Dec., 1891
Complete Specification Left, 1st Oct.; 1892-Accepted, 5th Nov., 1892
PROVISIONAL SPECIFICATION.
[Communicated from abroad by WILLIAM MILNE ROBERTSON, Assistant
Manager, Tanyong, Pagar Dock Co., Singapore.]
Improvements in or connected with Apparatus for the Erection of
Wharfs, Bridges, or other Permanent Structures of Concrete or
other analogous material.
I, GEORGE SCORGIE MACBAIN, of 216 Great Western Road Aberdeen, in the
County of Aberdeen, North Britain, Retired Ship Master, do hereby declare the
nature of this invention to be as follows:-
This invention relates to improvements in and connected with the erection of
wharfs, bridges, or other permanent structures of concrete or other analogous
material, and is more especially applicable as a means for encasing piles in
concrete.
In carrying my invention into practice I provide a cylinder of wrought iron, steel,
or other suitable inetal, made in two halves. These halves are bound together by eye
bolts fastened to the angles in the one half which pass through holes in the angles
of the other half. Through the eye of the bolts passes the wedge-shaped point formed
in one of the arms of a bell-crank, and the further this is passed through, the
harder the two halves are bound together. There is a rod fixed to the top arm of
the cranks on each side for the purpose of allowing the two halves to come apart.
The cranks are so arranged that when this rod comes in contact with the angles on
the opposite half the wedge-shaped points have cleared the eye bolts. Fixed to
the cylinder there is a bracket having a screw thread through which passes the rod.
A wheel is fitted, and by turning it the cranks are worked as required.
If the cylinder is required to be perfectly watertight, a rubber or leather joint
can be used between the angles.
In order to keep the pile in the centre of the cylinder when placing in position,
I provide a guide which is lowered down into the cylinder either with a rope or
steel wire or chain, and when the cylinder is once set in position the guide may be
drawn up before putting in the concrete.
As a modification of my improvements, in place of the bell-cranks as hereinbefore
described, I may bind the two halves together by means of a rod passing through
eyes alternately on each half.
Dated this 7th day of December 1891.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with Apparatus for the Erection of
Wharves, Bridges, or other Permanent Structures of Concrete or
other analogous material.
I, GEORGE SCORGIE MACBAIN of 216 Great Western Road, Aberdeen, in the
County of Aberdeen, North Britain, Retired Ship Master, 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 relates to improvements in and connected with the erection of
wharves, bridges, or other permanent structures of concrete or other analogous
material, and is more especially applicable as a means for encasing piles in

page_text: Where wharves are constructed of wood it will generally be found that first cost
has been the point in view, and more especially in private enterprise, but in many
places the erection of permanent structures of granite or concrete become pro-
hibitory, owing to the nature of the ground, unless at an enormous cost.
With wooden piles the upkeep is very great and more so in tropical waters where
the marine insects completely destroy the piles in a few years.
Amongst the many plans devised to protect the piles, concrete has been used and
with success. It is put round the pile from the mud line up to above the high water
mark, and about six inches thick all round. To do this a cylinder is lowered over
the pile until it rests on the mud; the water is then pumped out, and the concrete
put in from the top. This cylinder is made of wrought iron or steel, and in two
halves, bolted together; being made in this way it can be taken apart when the
concrete is set. It may be well to mention here that if the cylinder were made in
one piece it could not be drawn up without damaging the concrete, if it could be
taken up at all. On the other hand, to leave it in place would mean a cylinder for
every pile, the expense of which would at once condemn the protecting of piles in
this way. With the cylinder bolted together with screw bolts, divers are required
to unscrew them below water, which is tedious and expensive work.
To overcome this trouble and difficulty therefore is the object of my present
invention.
In order that my invention may be properly understood and readily carried into
effect I have hereunto appended an explanatory sheet of drawings, in the several
figures of which corresponding parts are marked with the same letters of reference.
Figure 1 is a side view of the apparatus shewing my improvements.
Figure 2 is a plan also shewing guide for keeping the pile in the centre of the
cylinder when placing it in position.
Figure 3 is a side view of a modification of my invention.
Figure 4 is a plan and shewing rods for guiding the cylinder over the pile in
place of the guide as shewn in Figure 2.
Figure 5 is a fragmental view of the adjustable guide.
In carrying my invention into practice I provide a cylinder of wrought iron,
steel, or other suitable metal, made in two halves A. and B. These halves A and B
are bound together by eye-bolts C fastened to the angle D in the one half B of the
cylinder, which pass through holes in the angle E of the other half A of the
cylinder. Through the eye of the bolts C passes the wedge-shaped point F formed
in one of the arms of a bell-crank G, and the further this is passed through, the
harder the two halves A and B are bound together. To enable the two halves A
and B to be taken apart I fix a rod H to the top arm of the bell-crank G on cach
side of the cylinder, the top end of this rod H being provided with a thread a.
This end a passes through a bracket N to which there is fitted a nut O, by turning
which the two halves are taken apart, and brought up by means of the pins or
eyes P.
In place of the nuts for taking the halves apart, I may have a wheel connected
to the rods H.
If the cylinder is required to be perfectly watertight, a rubber or leather joint
can be used between the angles.
In order to keep the pile U in the centre of the cylinder when placing in position,
I provide a guide S which is lowered down into the cylinder either with a rope or
steel wire or chain, and when the cylinder is once set in position the guide S
be drawn up before putting in the concrete.
may
In Figures 3 and 4 the bell cranks are dispensed with, and the two halves A
and B are bound together by means of two rods I, J, having wedge-shaped
pieces K which pass through eyes or links L passing through the angles D E.
These rods I, J are secured to the angles D, E, by means of bolts M, one end of
which works in slots R in the rods I, J.
In place of the guide S as described and shewn in Figure 2, I may provide
rods T for guiding the cylinder over the pile U so as to keep it equa-distant.

page_text: When the cylinder has reached the mud the rods T are drawn back flush by means
of a cord or small line as seen more particularly in Figure 5.
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 the erection of wharves, bridges, or other permanent structures of concrete
or other analogous material, the arrangement and method by which the two halves
of the cylinder are bound together and taken apart substantially as and for the
purposes herein before described and shewn on Figures 1 and 2 of the accompanying
sheet of drawings.
2. In the erection of wharves, bridges, or other permanent structures of concrete
or other analogous material, the arrangement and method by which the two halves
of the cylinder are bound together and taken apart substantially as and for the
purposes hereinbefore described and shewn on Figures 3 and 4 of the accompanying
sheet of drawings.
3. The guide for keeping the pile in the centre of the cylinder substantially as
described and shewn on Figure 2 of the drawings.
4. The rods for guiding the cylinder over the pile operated in the manner
substantially as described and shewn on Figures 4 and 5 of the drawings.
Dated this 30th day of September 1892.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.