IMPROVEMENTS IN APPA- RATUS FOR MOULDING TOOTHED OR OTHER WHEELS OR PULLIES OR PORTIONS OF CIRCLES FOR CASTING
Year: 1865

page_text: LETTERS PATENT to George Lamb Scott, of Manchester, in the County
.
of Lancaster, Moulder, for the Invention of "IMPROVEMENTS IN APPA-
RATUS FOR MOULDING TOOTHED OR OTHER WHEELS OR PULLIES OR PORTIONS OF
CIRCLES FOR CASTING."
Sealed the 17th April 1866, and dated the 25th October 1865.
PROVISIONAL SPECIFICATION left by the said George Lamb Scott at the
Office of the Commissioners of Patents, with his Petition, on the
25th October 1865.
I, GEORGE LAMB SCOTT, of Manchester, in the County of Lancaster,
Moulder, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN APPARATUS FOR MOULDING TOOTHED OR OTHER WHEELS OR PULLIES OF
PORTIONS OF CIRCLES FOR CASTING," to be as follows:-
My Invention consists in the use of a trammel carrying gearing by which
it may be caused to revolve, and consisting of a portable apparatus complete in
itself, so as to be capable of being adapted to any situation in the foundry.
This trammel carries a portion of the pattern, which may be lowered to admit
of the sand being rammed around it, and may then be withdrawn for another
operation.
The following is the mechanical arrangement I at present propose to
employ:-There is a shaft which may be bedded in the floor of the foundry,
and which corresponds to the centre of the wheel or other article to be cast.
Upon this shaft is mounted a radial arm, the outward end of which carries
the portion of pattern capable of being raised or lowered by a screw. The
radial arm and pattern are caused to move through the circle at intervals by a
handle connected by gearing to a worm wheel upon the central shaft, and at

page_text: these intervals the operation of moulding is performed by the turning of the
above-mentioned screw. The pattern can be moved inward or outward on
the radial arm for different diameters, and I adapt à dividing plate to guide
the workman in moving the pattern through the circle. When bevil wheels
are to be moulded the radial arm which carries the pattern can be fixed at
any angle.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said George Lamb Scott in the Great Seal Patent Office on the
25th April 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
LAMB SCOTT, of Manchester, in the County of Lancaster, Moulder, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fifth day of October, One thousand eight
hundred and sixty-five, in the twenty-ninth year of Her reign, did, for
Herself, Her heirs and successors, give and grant unto me, the said George
Lamb Scott, Her special license that I, the said George Lamb Scott, my
executors, administrators, and assigns, or such others as I, the said George
Lamb Scott, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times. thereafter
during the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention. for "IMPROVEMENTS IN
APPARATUS FOR MOULDING TOOTHED OR OTHER WHEELS OR PULLIES OR PORTIONS OF
CIRCLES FOR CASTING," upon the condition (amongst others) that I, the said
George Lamb Scott, by an instrument in writing under my hand and seal, should
particularly describe and ascertain the nature of the said Invention, and in
what manner, the same was to be performed, and cause the same, to be filed-in
the Great Seal Patent Office within six calendar months next and immediately
after the date of the said Letters Patent.
NOW KNOW YE, that I, the said, George Lamb Scott, do hereby declare
the nature of my said Invention, and in. 'what manner, the same is. to, be
performed, to be particularly described, and ascertained in and by, the follow-
ing statement and accompanying Drawings, that is to say :-
My Invention consists in the use of a trammel carrying gearing by which
it may be caused to revolve, and constituting a portable apparatus complete in
itself, so as to be capable of being adapted to any situation in the foundry

page_text: This trammel carries a portion of the pattern which may be lowered to admit
of the sand being rammed around it, and may then be withdrawn and moved
onward. for another operation, and thus the toothed or other wheel or circular
article is moulded by the use of a pattern which represents a portion only of.
the article to be produced, such general. principle of moulding, however, being
now in use and well understood.
In the accompanying Drawing Fig. 1 represents my improved apparatus
in side elevation, and Fig. 2 is a plan view thereof.
In order to fix the apparatus in. any desired part of the foundry, and to
provide a centre upon which it may turn so as successively to present
the segmental pattern to the sand; I employ a post a shewn detached at
Fig. 3;, this post is in the form of a spike provided with feathers, and is
driven or is otherwise forced or bedded firmly in. the floor of the foundry, upon.
its upper end is formed a.stud: b; and upon this as a preparatory measure.
is placed an ordinary plain. trammel,, which by being turned smooths.the
surface of the sand. for the process of moulding.. This plain. trammel having
been removed, the moulding apparatus which I will now proceed to, described
is placed upon: the stud b. At c is a boss mounted upon the aforesaid stud-b,.
and capable of being fixed thereon in any desired position. by set screws d;
and which carries at its upper end a stud e. Upon this stud e is formed a
block provided with a groove on each side, and within which are placed
two bars g united at each end, and constituting a frame capable of sliding in
the block. f, the overhanging parts thereof affording guides. Upon the
bars 9 are toothed racks i, in gear with which are pinions k mounted upon a
shaft 7, carried by bearings. which extend from the block f. The shaft / is
provided with a pulley handle m, by turning which the pinions k are caused
to act upon the racks i, and thus slide the bars 9 in the one direction or the
other within the guides formed in the block f, and when any desired position
is effected it may be retained by a bolt o proceeding from the block f through.
a slot n in the bar 9, and capable of being tightened by a nut. The upper-
part of the block f is provided with a boss p,. also capable of turning upon the
stud e, and supporting a worm wheel q, the boss r of which is fixed to the
stude by set screws 8, 8, so as to be fast therewith. Att is a cap piece-
attached to the stud e above the worm wheel q, so that
is confined thereto and cannot move upward. In gear with this wheel is a
worm 16 carried by a bracket v, which extends from the block f, and upon
the axis of the said worm is a. pinion w connected through a train. of change
wheels w', w, to a shaft x, mounted in bearings y, y, carried by one of the
bars g. The pinion w* of the train is mounted with a key situate within a
the said worm wheel.

page_text: groove in the shaft so as to permit the said shaft to slide through it. Upon
one end of the shaft is a pulley provided with a spring handle y fitting
into a notch of a disc z after the manner of an ordinary dividing plate. One:
end of the frame constituted by the bars g carries a V-formed guide 1 within:
which is placed a sliding piece 2; this sliding piece is formed hollow for
the reception of a chain shewn by the dotted line 3, and which chain is made:
fast to each end of the said sliding piece, it also passes around a pulley 4 to
which it is made fast at 5. The axis of the pulley 4 is carried by brackets:
extending from the V guide 1, and is provided with a worm. wheel 6 in gear
with a worm 7, upon a shaft 8 carried by bearings attached to one of
the bars g, and furnished at its outward end with a pulley handle 9.
At 10
is a screw passing through the guide 1, and capable of being caused to act
upon the sliding piece 2, so as to hold it firmly in any desired position. The
operation is as follows:-The sand having been smoothed by the ordinary tram-
mel as before described, and the said trammel having been removed from the
stud b, the boss c and its parts above described which are carried thereby
are placed as shewn in the Drawing upon the stud b. In order to facilitate
this I form a ring 12 upon the cap piece t, to which ring a chain connected
with a crane may be attached'; this having been done the boss c is tightened
upon the stud b, by the set screws d, and the pulley handle m is turned so as
to give motion to the pinions k, and through them cause the racks i and frame
g. to slide outward or inward until the patten holder 18. upon the bar 2.
occupies the radius required. The pulley handle 9 is then turned, by which
means the worm 7 will cause the pulley 4 to revolve, and through the medium
of the chain 3 force downward the V sliding bar 2, and with it the segmental
pattern (not shewn in the Drawing but attached to the part 18) into the sand,
then the screw 10 is turned so as to fix the bar 2 steadily, and the sand is
rammed around the pattern as usual, after which the pattern is raised by turning
the pulley handle 9 in the other direction, and one portion of the wheel is thus
moulded. In order to mould a second portion the handle y is turned one or
more revolutions according to the space the segmental pattern is to pass through,
which revolutions are registered by the notch in the disc 2. By this operation
the train of wheels. w will impart rotatory motion to the worm u, and as the
wheel with which it is in gear is fixed the whole apparatus will turn bodily
upon the stud b, and move the segmental pattern through the space required
for another operation of moulding, which is then performed as above described,
and so on until the entire wheel is moulded. The gearing w is a train
similar to ordinary change wheels of lathes, and the numbers of teeth are
arranged so as to move the pattern at each revolution of the shaft & through

page_text: a space into which the wheel to be moulded will divide; the depth to which
the pattern is to be forced into the sand is regulated by a stop 2*, attached
to the bar 2, which stop may be adjusted in any position and arrives in
contact with the top of the guide 1. In moulding light wheels or other
circular articles, the pattern may be moved comparatively quick, and I
have therefore shewn a pulley on the shaft of the wheel 6, which if the
said worm wheel 6 be removed may give direct motion to the pulley 4 and
chain 3..
At Fig. 4 is an additional stud 15, the boss 16 of which may be placed
upon the stud b, in order when desirable to elevate the whole apparatus; at
17 is a box placed upon the bars 9, and in which any desired weight may
be placed in order to balance the apparatus according to the distance that
the pattern is moved outward from its centre of motion. The toothed wheel
or other circular article having been moulded as above described by successive
printings of the segmental pattern, arms, or other such parts may be added by
the use of cores as is well understood, and a top mould box employed as is
usual.
Having thus described and ascertained the nature of my said Invention,
and the manner in which the same is to be performed I desire it to be under-
stood that I do not limit myself to the precise arrangements of parts above
described, but claim as secured to me under the above in part recited Letters
Patent, and for the purpose above set forth, the use of a trammel carrying
gearing and other parts substantially as described. Also the use of the
moveable centre of motion a, b, and constructing the moulding apparatus so
as to constitute a machine complete in itself, and capable of being adapted
to any part of the foundry.
In witness whereof, I, the said George Lamb Scott, have hereunto set
my hand and seal, this Twenty-fourth day of April, in the year of our
Lord One thousand eight hundred and sixty-six.
GEORGE L. SCOTT. (L.s.)