1MPROVED APPARATUS FOR STRIKING MOULDS FOR HAND RAILS
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the lustitute of Patent
Agents, do hereby declare the nature of the said Invention for "1MPROVED
APPARATUS FOR STRIKING MOULDS FOR HAND RAILS" a communication to me
from abroad by Frederick Robert Bodley, of Denver, in the County of Arapahoe,
and State of Colorado, United States of America, Stairbuilder to be as follows:-
The object of this Invention is to furnish an apparatus for use in producing
moulds for hand rails of any required pitch, size and shape, without requiring
special skill for its operation, and to that end the Invention consists in a mould
striker, in which horizontally and vertically adjustable arms and a pivoted arm
furnished with a tracer are combined as hereafter described.
The apparatus is constructed of a post provided with legs for its support in an
upright position and pairs of arms hung adjustably on the post as follows. The
inner end of the one arm passes through a vertical slot in the post and its end has
an aperture that receives a pin on the end of the second arm loosely so that the
first arm is held to the post and may swing up and down, while the post is cut
away at the side of the slot so as to allow a side movement of the second arm in
addition to its up and down motion. The arms are provided with curved braces
passing through cleats on the post that are provided with screws for clamping the
braces and retaining the arms in position when adjusted. The arms have screws
for holding the inould board up to place and the cleat receiving the brace of one
of the arms is free to turn on the post with the arm, a screw being provided for
clamping it.
Upon the upper end of the post is a block to which is pivoted the slotted arm
This block can be
carrying a tracer that is held in the slot by a clamping screw.
raised and lowered and also turned on the post and it is fitted with a pivoted plate
for use as hereinafter specified.
In order to use the apparatus the post is set upright on the plan board, at the
centre of the curve of the ground plan, and with one arm directly above one spring
line. The other arm is then to be turned to coincide with the other spring line, the

page_text: first arm raised and the second arm lowered to the proper pitch line and the arms
clamped. The mould board is then attached to the under side of the arms by the
screws and thus attached the board is held at the pitch required. The tracer is
then adjusted or swung out to mark the inner and outer lines of the curved mould
according to the plan, each being marked in turn by turning the tracer and block.
The bevels for the ends of the mould are next taken by placing a bevel upon the
board at right angles to the spring line and adjusting its blade to the first arm
which will give a vertical line dropped from the spring line, or the bevel for the
ends. When the tangents are not square on the ground plan the bevel must be
placed at right angles to the tangent line adjusted to the pivoted plate, above
mentioned as being attached to the block on the upper end of the post, which is
then turned out for that purpose.
It will be seen that these operations are simple and easily learned, so that the
most difficult mould can be struck out on the mould board as easily as simple
forms, and the subsequent work of cutting and shaping easily done.
As the mould boards are usually heavy it will be found more convenient to lay
the board on a bench and screw the arms down upon it, instead of raising the
board. The standard in that case will hang down in front of the board at an
angle.

page_text: I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of the said Invention for "IMPROVED
APPARATUS FOR STRIKING MOULDS FOR HAND RAILS" (a communication to me
from abroad by Frederick Robert Bodley of Denver, in the County of Arapahoe
and State of Colorado, United States of America), 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 this Invention is to furnish an apparatus for use in producing
moulds for hand rails of any required pitch size and shape, without requiring
special skill for its operation, and to that end the invention consists in a mould
striker constructed as hereinafter described and claimed.
Reference is to be had to the accompanying drawings forming a part of this
specification in which similar letters of reference indicate corresponding parts in all
the figures.
Figure 1 is a perspective view of the apparatus as applied to use.
Figure 2 is a horizontal section of the same and Figure 3 is a detail plan view
showing the manner of obtaining the bevels.
A is a post provided with legs a a for its support in an upright position. B, B' are
arms hung adjustably on the post as follows. The inner end of arm B passes through
a vertical slot b in the post and its end has an aperture that receives a pin c, on the
end of arm B¹ loosely so that the arm B is held to the post and may swing up and
down. The post is cut away at the side of slot b to allow a side movement of
arm B in addition to its up and down motion permitted by the connection.c. The
arms are provided with curved braces d d, passing through cleats e, e on the post
that are provided with screws f for clamping the braces and retaining the arms in
position as adjusted. The arms are fitted with screws k for holding the mould
board up to place and the cleat e receiving the brace of arm B' is free to turn on
the post A with the arm, a screw e¹ being provided for clamping it.
This
Upon the upper end of post A is a block g to which is pivoted a slotted arm h,
carrying a tracer i that is held in the slot of arm h by a clamping screw m.
block g can be raised and lowered and also turned on the post and it is fitted with
a pivoted plate n for use as hereinafter specified The tracer is provided with a
pencil at its lower end.
In order to use the apparatus the post A is set upright on the plan board, at the
centre of the curve of the ground plan, and with arm B directly above one spring
line. The arm B' is then to be turned to coincide with the other spring line arm B
raised and arm B' lowered to the proper pitch line and the arms clamped. The
mould board shown at 7 in the drawing is then attached to the under side of the
arms B, B¹ by the screws k and thus attached the board is held at the pitch
required. The tracer is then adjusted or swung out to mark the inner and outer
lines of the curved mould according to the plau, each being marke in turn by
turning the tracer i and block g. The bevels for the ends of the mould are next
taken by placing a bevel o upon the board at right angles to the spring line and
adjusting its blade to the arm B as shown in Figure 3 which will give a vertical
line dropped from the spring line, or the bevel for the ends. When the tangents
are not square on the ground plan the bevel must be placed at right angles to the
tangent line adjusted to the plate n which is then turned out for that purpose.

page_text: It will be seen that these operations are simple and easily learned, so that the
most difficult mould can be struck out on the mould board as easily as simple forms,
and the subsequent work of cutting and shaping easily done.
As the mould boards are usually heavy it will be found more convenient to lay
the board on a bench and screw the ans down upon it, instead of raising the board
as shown. The standard in that case will hang down in front of the board at an
angle.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is
1. The combination of parts forming a mould striker consisting of post A,
horizontally and vertically adjustable arms B, B' pivoted arm and tracer i
substantially as described and for use as specified.
2. In a mould striker the arm B arm B¹ having pin c, cleats e and braces d
combined with slutted post A, substantially as described.
3. In a mould striker the block g slotted arm h, and tracer i, combined with the
post A substantially as described.
4.-In-a mould striker-the screws h, in combination with the adjustable arms B, B¹,
us and for the purpose specified.
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5. In a mould striker the pivoted plate » combined with the block g, and post A,
as and for the purpose specified.