An Improved Milling and Gear-cutting Attachment for Lathes.
Year: 1893

page_text: Date of Application, 27th June, 1893
Complete Specification Left, 20th Mar., 1894-Accepted, 5th May, 1894
PROVISIONAL SPECIFICATION.
An Improved Milling and Gear-cutting Attachment for Lathes.
We, GEORGE SONNENTHAL, Engineer, and HENRY JESSE BAMFORD, Engineer,
both of 85 Queen Victoria Street, in the City and County of London, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to an improved milling and gear-cutting attachment for
lathes, which is constructed in the following manner:- -On to the slide rest of the
lathe is fixed, by the stud adapted to carry the tool-holder, a plate to one edge of
which is pivotted another plate capable of being fixed at any desired angle with the
plate fixed to the slide rest by means of a quadrant or its equivalent. This plate
carries two bearings at right angles to one another. In the vertical bearing is
mounted the cutter spindle and in the horizontal one the driving spindle which is
geared to the cutter spindle by bevel gear and which carries a small drum or pulley
adapted to be driven from the overhead apparatus or from a countershaft by means
of a belt. The lower end of the cutter spindle is threaded to receive_nuts and
washers to provide for the adjustment of the cutters on the said spindle. The plate
carrying the cutter and driving spindles is also provided with a hole so that it can
be fixed to the slide rest when it is desired to run the cutter in the horizontal plane
for cutting keyways in shafting and like work.
Dated this 27th day of June 1893.
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicants.
COMPLETE SPECIFICATION.
An Improved Milling and Gear-cutting Attachment for Lathes.
We, GEORGE SONNENTHAL, Engineer, and HENRY JESSE BAMFORD, Engineer,
both of 85 Queen Victoria Street, in the City and County of London, 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 :-
Our invention relates to an improved milling and gear-cutting attachment for
lathes, which is constructed in the following manner :-On to the slide rest of the
lathe is fixed, by the stud adapted to carry the tool holder, a plate to one edge of
which is pivotted another plate capable of being fixed at any desired angle with the
plate fixed to the slide rest by means of a quadrant or its equivalent. This plate
carries two bearings at right angles to one another. In the vertical bearing is
mounted the cutter spindle, and in the horizontal one the driving spindle which is
geared to the cutter spindle by bevel gear and which carries a small drum or pulley
adapted to be driven either from an overhead apparatus or from a countershaft by
means of a belt. The lower end of the cutter spindle is threaded to receive nuts
and washers to provide for the adjustment of the cutters on the said spindle. The
plate carrying the cutter and driving spindles is also faced and provided with a
D
1

page_text: hole so that it can be fixed to the slide rest when it is desired to run the cutter in
the horizontal plane for cutting keyways in shafting and like work.
In the accompanying drawing which illustrates our invention :-
Figure 1 is a view in elevation of our attachment showing how the angle at
which the cutter rotates with respect to the lathe spindle may be varied.
Figures 2 and 3 are views of a modification of the attachment showing the two
positions in which it can be fixed to the slide rest of the lathe.
Throughout the views similar parts are marked with like letters of reference.
Our improved gear cutter consists of a plate A adapted to be fixed to the slide
rest of a lathe by the stud adapted to carry the tool holder, a hole a being formed
in the plate A for the said stud to pass through. Hinged to the forward edge of
the plate A is another plate B the position of which with respect to the plate A
may be varied as desired by means of the quadrant C or by any other equivalent
device. The plate B carries two bearings E and F at right angles to one another.
In the vertical bearing E is mounted a spindle G adapted to carry at its lower end
a cutter H in the ordinary manner. On to the opposite end of the spindle G is
fixed a small bevel pinion J. In the horizontal bearing F is mounted a spindle K
carrying at one end a bevel pinion L gearing with the bevel pinion J on the vertical
spindle G and on the other end is fixed a small driving drum or pulley M, which is
adapted to receive its motion either from an overhead apparatus or from a counter-
shaft by means of an ordinary belt. The plate B is also provided with a hole b
whereby it may
be fixed to the slide rest of the lathe when it is desired to run the
cutter in the true vertical plane.
As a modification the two plates A and B may be formed in one piece so that
their faces are always at right angles to each other as shown by Figures 2 and 3,
the former showing the position of the attachment on the slide rest for running the
cutter in the horizontal plane and the latter showing the position for running the
cutter in the vertical plane.
It will be seen that with our improved attachment gear wheels of any description
and of any diameter which the lathe will admit can be cut and also that it will
flute reamers, groove taps and cut keyways in shafting. By the substitution of an
emery wheel for the cutter work reamers and taps can be resharpened and ground
in the groove.
We wish it to be particularly understood that we do not limit ourselves to the
precise details of construction herein before described and illustrated by the accom-
panying drawing, but that we hold ourselves at liberty to make such changes and
alterations as fairly fall within the spirit and scope of our invention.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is -
1. The improved milling and gear-cutting attachment for lathes, substantially as
herein before described and illustrated in the accompanying drawing.
2. In a milling and gear-cutting attachment for lathes, the combination of the
plates A and B hinged or pivotted together at one edge, of the quadrant C
controlling the position of the two plates A and B with respect to each other, of
the vertical bearing E and the horizontal bearing F carried by the plate B, of the
spindles G and K mounted in the bearings E and F respectively, of the bevel
pinions J and L mounted on the spindles G and K respectively and gearing with
each other, of the cutter H mounted on the spindle G, and of the drum or pulley M
mounted on the spindle K, all combined, arranged and adapted to operate as and
for the purpose set forth.
3. In a milling and gear-cutting attachment for lathes, the combination of the
plates A and B formed in one piece or securely fixed together at right angles to
one another and having holes a and b in them, of the vertical bearings E and the
horizontal bearing F carried by the plate B, of the spindles G and K mounted in
the bearings E and F respectively, of the bevel pinions J and L mounted on the

page_text: spindles G and K respectively and gearing with each other, of the cutter] H
mounted on the spindle G, and of the drum or pulley M mounted on the spindle K,
all combined, arranged and adapted to operate as and for the purpose set forth.
Dated this 20th day of March 1894.
ROBERT E. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicants.