Improvements in Lathes or Apparatus for Producing Ornamental Work.
Year: 1889

page_text: Date of Application, 20th Aug., 1889
Complete Specification Left, 20th May, 1890-Accepted, 12th July. 1890
PROVISIONAL SPECIFICATION.
Improvements in Lathes or Apparatus for Producing Ornamental
Work.
I, WILLIAM AUGUSTUS KENNEDY GOSTLING, of Cathay, Ealing Common, in the
County of Middlesex, Gentleman do hereby declare the nature of this Invention to be
as follows:-
66
The object of my invention is the construction of apparatus, which will produce
surface ornamentation of a novel character upon planes, cylinders, or other objects.
The said apparatus is mainly applicable to an ornamental" lathe provided with a
"spiral apparatus," but it may also be applied to an ordinary screw-cutting lathe, or
it may be constructed as an independant machine.
The ornamentation or pattern produced by the apparatus forms a new departure in
the ornamentation of surfaces and consists of regular or irregular reciprocating figures
or curves, which can be varied in form infinitely as desired, and are capable of being
instantly reversed in direction, even while being executed.
In applying my invention to an ornamental lathe, having a spiral apparatus, I place
on the intermediate arbor of the said spiral apparatus, a device similar in construction
to an eccentric chuck. It consists essentially of a slide, carrying a plate or disc
capable of being revolved and fixed in any position by means of a click-plate arrange-
ment, tangent screw and worm wheel, or other device. This disc is provided with a
stud or projection, upon which cam or shaper plates of any regular or irregular
pattern can be attached. An arm is affixed to the lathe spindle, provided with an
adjustable rubber or roller to bear upon the periphery of the cam or shaper plate,
and contact is preferably ensured by a weight hung on the arm, although a spring
may be employed. A fixed tool, or drill being placed in the slide rest, and the
spiral apparatus set in action, a reciprocating motion will be imparted to the lathe
spindle, the form of pattern cut upon the work by the combined action of the straight
line motion of the fool, and the reciprocating motion of the mandrel, will depend,
partly upon the contour given to the cam or shaper plate aforesaid, partly upon the
amount of eccentricity given to the cam by the slide, partly upon the position of the
rotating disc, and partly upon the gearing of the change wheels. By this means
patterns of an irregular and complex form may be cut in infinite variety, and effects
of great beauty produced, which cannot be obtained by any existing form of
ornamental cutting apparatus. I prefer in practice to provide two holes in the cam
or shaper plate, one at the centre, and one eccentrically thereto; so that when the
eccentric hole is used, a greater depth is given to the wave.
Instead of the single slide carrying a rotating disc, as above described, I may
employ a compound slide. In this case I affix a second slide to the disc, and attach
another disc to the second slide, to carry the cam or shaper plates. Both discs are
arranged as click plates, or provided with tangent screws and worm wheels. By this
means I can obtain an eccentric adjustment in two directions, one of the advantages
of which is that the cam plate may be made central when the boss of the disc is in the
eccentric hole in the said cam plate, and the double slide gives additional power in
varying the pattern of the work to be produced.
In applying the invention to an ordinary screw-cutting lathe, the eccentric chuck
and cain would be fitted to the intermediate change wheel stud, and for ornamenting
cylindrical work, the saddle, change wheels and spindle, would be operated by rotating
the leading-screw. For ornamenting surface work, the saddle would be fixed,
and the cross-slide screw driven from the leading-screw by means of any suitable

page_text: gearing. It is however obvious that an independent machine could be constructed
in accordance with my invention for cutting ornamental patterns of this character
alone.
Dated this 19th day of August 1880
AMBROSE MYALL,
21, Cockspur Street, London, S.W., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Lathes or Apparatus for Producing Ornamental
Work.
I, WILLIAM AUGUSTUS KENNEDY GOSTLING, of Cathay, Ealing Common, in the
County of Middlesex, Gentleman 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:-
"
The object of my invention is the construction of apparatus, which will produce
surface ornamentation of a novel character upon planes, cylinders, or other objects.
The said apparatus is mainly applicable to an ornamental" lathe, provided with a
"spiral apparatus," but it may also be applied to an ordinary screw-cutting lathe, or
it may be constructed as an independant machine.
The ornamentation or pattern produced by the apparatus, forms a new departure in
the ornamentation of surfaces, and consists of regular, or irregular reciprocating
figures, or curves, which can be varied in form infinitely as desired, and are capable
of being instantly reversed in direction, even while being executed.
The accompanying two sheets of drawings represent the application of my invention
to an ornamental lathe, having a spiral apparatus. Figs. 1 and 2 are elevations of
the apparatus, Fig. 1 being viewed from the end, and Fig. 2 from the front of the
lathe, the latter is partly in section. Fig. 3 is a detached view of a cam or shaper
plate.
Similar letters refer to similar parts throughout the drawings.
A is part of the lathe head-stock, and B the tail-end of the spindle. C is a slotted
arm forming part of the spiral apparatus, and fixed to the head-stock by the studs and
nuts D D. E is a bush, fitted to slide in the slot of the arm C, and provided with a
collar E', washer E², and nut E³, to enable it to be fixed in any required part of the
said slot. F is a small slide, operated by the screw F¹, and provided on the back with
a stud H. This stud has an enlarged part H', fitted with a feather to receive one of
the change wheels J of the spiral apparatus, and it works in the bush E, and is
provided with a washer H3 and nut H³ to retain it within the said bush. On the
face of the slide Fa disc or click-plate K is placed. This disc can be rotated on a
central stud on the slide F, and can be secured in any required position by the
spring catch K engaging one of the holes in the edge of the disc. The said disc
carries a second small slide L, operated by a screw L', and provided with a stud M,
upon which any cam or shaper plate, such as N, may be fixed by the nut M' and
washer M. A boss P is fixed on the tail end B of the lathe spindle, and carries a
sliding arm Q, which can be held in any required position by the screw P¹. This
arm is provided with a rubber R, kept in contact with the edge of the cam N, by
means of a weight S hung on the arm. The slide-rest screw is connected with the
arbor T in the usual manner, and a change wheel J' is placed on the said arbor to
gear with the wheel J. A drill, or cutter being placed in the slide-rest, and the
screw of the slide-rest being rotated, a reciprocating motion will be imparted to the
lathe spindle and a reciprocating pattern will be cut upon the work. The form of
pattern cut can be varied to an unlimited extent. In the position shewn in the
drawings, the two slides F and L are both in the centre of their traverse, so that
the stud M is in line with the stud H, and the form of the pattern will then depend

page_text: solely on the contour of the cam N. In Figs. 1 and 2 a heart shaped cam is shewn as
fixed in place, Fig. 3 represents a plain ellipse, but cams of any desired form may be
used. If the slide F be operated the cam will be thrown out of the centre, and the
pattern at once altered, a further alteration can then be obtained by operating the
slide L, and a still further alteration by changing the angle between the directions of
motion between the two slides by means of the click plate K. In addition to the
central aperture N' in the cam, I preferably provide an eccentric aperture N³, which
will increase the depth of wave cut by the tool, beyond the depth which can be given
by the slides. The length or pitch of the reciprocations in the pattern is governed by
the ratio of the change wheels used. It will thus be seen that the form of the pattern
cut upon the work by the combined action of the straight line motion of the tool and
the reciprocating motion of the mandrel, will depend, partly upon the contour given to
the cam plate, partly upon the position of the slides and the click plate, partly upon
which hole in the cam is used, and partly upon the ratio of the change wheel gearing.
The pattern will also further depend upon the shape given to the cutter or drill in the
slide rest. By this means patterns of an irregular and complex form may be cut in
infinite variety, and effects of great beauty produced, which cannot be obtained by
any existing form of ornamental cutting apparatus.
Various modifications may be effected in the construction and arrangement of the
apparatus without departing from the essential principles of the invention. Thus for
example a second click plate may be placed on the slide L, and the cam fixed on the
said click plate, but practically the same effect may be obtained by slackening the
nut M', rotating the cam into the required position, and then retightening the nut.
The apparatus may be constructed with a single slide F and click plate K, the cam
being fixed on a stud on the said click plate, or the click plate may also be dispensed
with, the cam being fixed directly on a stud on the slide, but in this case the choice
of positions in which the cam be placed is necessarily somewhat restricted, as compared
with the more complete arrangement.
In place of the click plate for giving angular adjustment, a tangent screw and
worm wheel, or other suitable device may be employed, while a spring may be used
instead of the weight S to keep the rubber R in contact with the cam. The rubber R
may be furnished with a roller to bear upon the periphery of the cam to reduce
friction, but such roller arrangement is only suitable for cams having no sharp
indentations, as the roller if of sufficient size to be of use, would not enter such
depressions and would therefore not give the required motion to the lathe spindle.
A radial arm is sometimes fitted to the lathe head-stock, to take the change wheels of
the spiral apparatus, and in such case, if more convenient, my apparatus may be fitted
to such radial arm, instead of to the arm C, as shewn in the drawings.
In applying the invention to an ordinary screw-cutting lathe, the slides and cam
would be fitted to the intermediate change wheel stud, and for ornamenting cylindrical
work the saddle, change wheels and spindle would be operated by rotating the leading
screw of the lathe. For ornamenting surface work, the saddle would be fixed, and
the cross-slide screw driven from the leading screw by means of any suitable gearing.
It is however obvious that an independant machine could be constructed in accordance
with my invention, for cutting ornamental patterns of this character alone.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is
1. An apparatus for giving regular or irregular reciprocating motion to material,
while being operated on by a traversing cutting tool in a lathe, or other machine, by
means of a rotating cam, or shaper plate, actuating an arm on the spindle of
the machine, and adjustable in any required position by means of a slide or slides
and a click plate, or click plates, or other suitable means of angular adjustment,
substantially as set forth.
2. The combination with the spiral apparatus of an ornamental lathe, of the

page_text: apparatus for giving regular or irregular reciprocating motion to material while being
operated on by a traversing cutting tool, substantially as herein described and shewn
with reference to the accompanying drawings.
3. The combination with an ordinary screw cutting lathe; of the apparatus for
giving regular or irregular reciprocating motion to material while being operated on
by a traversing cutting tool, substantially as set forth.
Dated this 20th day of May 1890.
AMBROSE MYALL,
21, Cockspur Street, S.W., Agent for the Applicant.
AMBROSE MYALL,
21, Cockspur Street, S.W., Agent for the Applicant.