IMPROVEMENTS IN MACHINERY POR TURNING PRISMATIC FORMS
Year: 1854

page_text: LETTERS PATENT to George Tomlinson Bousfield, of 8, Sussex Place,
Loughborough Road, Brixton, in the County of Surrey, for the Invention
of "IMPROVEMENTS IN MACHINERY POR TURNING PRISMATIC FORMS."-A
Sealed the 12th January 1855, and dated the 9th November 1854.
PROVISIONAL SPECIFICATION left by the said George Tomlinson Bousfield
at the Office of the Commissioners of Patents, with his Petition, on the
9th November 1854.
I, GEORGE TOMLINSON BOUSFIELD, of 8, Sussex Place, Loughborough Road,
Brixton, in the County of Surrey, do hereby declare the nature of the Inven-
tion for "IMPROVEMENTS IN MACHINERY FOR TURNING PRISMATIC FORMS " to be as
follows:-
This Invention consists of combining mechanical parts into a machine in
such manner that the revolving cutter, cylinder, or frame is caused alternately
to approach and recede from the material to be cut, and in such manner that
articles of prismatic forms of any desired contour longitudinally may be turned
with great rapidity. For this purpose, the material to be cut is mounted as in
a lathe, but in place of being caused continually to revolve, it is only turned a
quantity each time of the movement of the cutter frame or cylinder from and
to it, and there is a count wheel and stop and ratchet and driver applied.for

page_text: rotating the material (to be cut) a regulated quantity, and for retaining the
same in position when the cut is being made. The cutters are mounted and
fixed on a rotatory frame or cylinder, which, in addition to its rotatory motion,
is caused to move to and from the material to be cut, thus allowing the
material to be caused by the working of the machine to present a fresh surface
to the action of the cutter each time the cutter frame moves from and to
the material.
SPECIFICATION in pursuance of the conditions of the Letters' Patent, filed
by the said George Tomlinson Bousfield in the Great Seal Patent
Office on the 4th May.1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
TOMLINSON BOUSFIELD, of 8, Sussex Place, Loughborough Road, Brixton, in
the County of Surrey, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Ninth day of November, in the year of our Lord
One thousand eight hundred and fifty-four, in the eighteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said George Tomlinson Bousfield, Her special licence that I, the said
George Tomlinson Bousfield, my executors, administrators, and assigns, or
such others as I, the said George-Tomlinson Bousfield, my executors, admi-
nistrators, 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 MACHINERY FOR TURNING PRISMATIC FORMS,"
(being a communication from abroad,) upon the condition. (amongst others).
that I, the said George Tomlinson Bousfield, 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 Tomlinson Bousfield, do hereby
declare the nature of the said Invention; and in what manner the same is
to be performed, to be particularly described and ascertained in and by the:
following statement thereof, .together with the Drawings .hereto 'annexed;"
that is to say:
•

page_text: The Invention consists of an automatic combination of a cylinder of rotating
cutters, mechanism for causing the same alternately to approach the block and
recede therefrom, and a suitable device for the purpose of turning the block a
portion of a revolution after each cut, the operations all succeeding each other
in the proper order without requiring the hand of the operative, except to take
out the finished article and put in a new block, by which means articles of
prismatic form and of any desired contour longitudinally may be turned with
great rapidity and perfection.
In the accompanying Drawings, Fig. 1 is a plan of the machine; Fig. 2,
an end elevation; Fig. 3, à transverse section, upon the line X, X, of Fig. 1,
with the cutters removed; Fig. 4, details, to be hereafter referred to. A is
the cutting cylinder, the cutters B being secured to the longitudinal bars of the
same by nuts and screws, as seen in Fig. 1. This cylinder runs in the sliding
carriage C, which is made to vibrate.to & from the material to be cut D, in a
manner which will be hereafter explained; the transverse bars of this carriage
being made hollow for the purpose of strength, as seen in Fig. 3. The block
or log D to be operated upon is centred upon poppet heads E, E, in the
manner adopted in lathes of ordinary construction. Upon the shaft of
the mandril F is a dial plate Grpierced with circles of holes, for the purpose
of regulating the number of sides to be given to the prismatic body to be cut.
His a spindle, which slides longitudinally in the framework of the machine,
and carries the arm I, from which projects the catch bolt 6, which enters one
ör other of the holes 'a of the dial plate; this catch bolt plays within grooves c
in the face of the dial plate G, and is pressed up against the wheel and retained
within the grooves by a spring d. Motion is communicated to the machine
through the pulley K upon the shaft of the cutter cylinder. L is a pulley
upon the other end of this shaft, from which motion is communicated by
mean's of the band M to the pulley Nupon the shaft O; P is a pinion upon
the other end of this shaft, which engages with the wheel Q upon the
shaft R. Upon the opposite end of this shaft is a pinion S, which gears with
the wheel-T upon the shaft U. This shaft carries a pinion V, seen in red
in Fig. 1, and dotted in Fig. 2. This pinion engages with the wheel W
upon the shaft Y Upon the shaft Y, and outside of the framework of
the machine, is a disc, carrying a crank pin f, upon which plays the con-
necting rod Z; the other end of which is secured to the framework at 9.
The parts K, L, M, N, O, P, Q, R, S, T, U, V, W, Y, are all borne by the
carriage Cand-move with it and the cutter cylinder: Through the connection
of the parts already explained, it is evident that as the cutter cylinder revolves,
the shaft will also revolve; though much more slowly; and thus; by means

page_text: of the connection between the crank pin f and the rod Z, as the shaft Y
revolves, it also vibrates back and forth, carrying with it. the sliding carriage
and the cutter cylinder to and from the article to be cut. The pulley N runs
loosely upon the shaft O, and is clutched therewith by means of the clutch h,
which is moved by the shipping lever A and shipping rod i. The block to be
cut is rotated. intermittently in the following manner:-B2 is an arm pivoted
to the framework at k, to the upper end of which is secured an adjustable
arm C2, which carries at its opposite extremity a spring pawl (seen detached in
Fig. 4), which operates upon the teeth in the periphery of the dial plate G to
move it in one direction. m &n are pins projecting from an adjustable arm
m&n
De secured to the carriage; these pins, striking against the arm B, move it'in
and out, together with the lever C. Before the dial plate can be revolved by
the spring pawl p, it is necessary that the catch 6 be withdrawn from the
hole a; this is effected in the following manner :-E is a swinging latch,
attached to the carriage C, and travelling with it.. As the cutter: cylinder
recedes from its work, the inclined surface of the latch E3 bears against the
end of the spindle H of the latch b, and withdraws the latter from the hole in
the dial plate; the next instant the pin m strikes the lever B, and the dial
plate is revolved until the latch 6 falls into the next hole a, when the dial plate
and material are again held stationary until the cylinder has finished its cut
and commences to return. F2 is a lever, by operating which the pawl p
may be held off from contact with the teeth of the dial plate whenever it
becomes desirable that the dial plate shall not be revolved by the motion of
the carriage

page_text: fluted and not plain, as has heretofore been the case. The cylinder having
finished its cut, the carriage commences to recede, and the latch E' strikes
against the spindle H, and withdraws the catch b from the hole in the dial
plate G. The pin m then strikes the arm B2, and the dial plate is revolved
until the catch b falls into the next hole a, and a new portion of the block is
presented to the cutters, which now advance again as before. The number of
holes in the groove c corresponds to the number of sides to be given to the
finished article.
Having thus described the nature of the said Invention, and the manner of
carrying it out, I would have it understood that I claim the within-described
machine for turning prismatic forms, consisting essentially of the following
elements in combination, viz, a rotating cylinder of cutters, mechanism for
rotating intermittently the block to be cut, and for moving the cutter cylinder
to and from the same, the whole operating in the manner and for the purpose
substantially as herein set forth.
W. S. HARRISON,
2, New Court, St. Swithin's Lane,
Witness.
GEO. T. BOUSFIELD. (L.s.)