IMPROVEMENTS IN LATILES,
Year: 1881

page_text: LETTERS PATENT to George Ernest Sherwin, of Birmingham, in the County
of Warwick, Manufacturer, for an Invention of "IMPROVEMENTS IN LATILES,
PROVISIONAL SPECIFICATION left by the said George Ernest Sherwin at
the Office of the Commissioners of Patents on the 7th May 1881.
GEORGE ERNEST SHERWIN, of Birmingham, in the County of Warwick, Manu-
facturer. "IMPROVEMENTS IN LATHES, AND IN TOOLS AND APPLIANCES FOR
LATHES AND OTHER MACHINES."
The first part of my Invention relates to improvements in lathes for turning
pulleys, wheels, and other articles, and consists in forming or fixing an arm or
bracket on the fast head stock, the said arm or bracket extending to or beyond
the periphery of the faceplate. On this arm or bracket I forn a bed at right.
angles to the lathe spindle, and by preference horizontal. An ordinary slide rest
fits and slides on this bed to or from the axis of the lathe, and has the usual self
acting or hand feed motions of an ordinary slide rest carrying the cutting tool or
tools. The bed carrying this slide rest may be either horizontal or vertical, and
formed either on the fast headstock or that part of the lathe bed carrying the fast
headstock, but in all cases it is formed on that part or parts of the lathe behind
the face plate, and for convenience the rest is carried out so as to allow the tool to
turn the periphery of as large a wheel or article as the lathe will admit, as well as
smaller ones.
The second part of my Invention consists of an angle plate for use with a lathe.
The body of this angle plate consists of a bed, the back part of which is turned
to fit into a recess formed for its reception in the face plate of the lathe. On the
front part of this bed an angle plate of the ordinary construction is made to
slide to and from the axis of the lathe, the adjustment being effected preferably
by a screw.
The third part of my Invention consists of an adjustable bolt to be used on all
kinds of machine tools instead of the ordinary wood packing. This adjustable
bolt consists of a body or nut, into one end of which a bolt or screw fits, for the

page_text: purpose of holding.or securing this nut to the plate or bed of the machine; in
the other end of this nut a bolt or screw fixed and screws in or out for the purpose
of adjustment to the exact height or distance required. The nut is sometimes
formed large enough to receive the adjustable bolt or screw as well as the holding'
down-bolt.
The fourth part of my Invention consists in improvements in the tools used
with lathes, planing, and other machine tools. The improved tool consists of two
parts, namely, the tool proper or cutter, and the holder for the same. The tool is
made of steel, circular in cross section, and with one or two sides made flat; the
holder is drilled out to receive the tool, the tool being secured in its position by
one or more fixing screws passing through the holder. I sometimes forin two tools
in one holder so as to take two cuts at one time. The holders for turning
tools have the hole or holes for the tool or tools drilled parallel with their length,
but the holes in boring tools are drilled at right angle with their length, the
boring tools taking a cut at both ends at the same time.
My fifth improvement consists in giving a slotting or shaping motion to the
upper part of the lathe rest carrying tool. I carry out this improvement by
forming on the underside of the top part of the rest a groove or slide in which a
block works; this block rotates on a pin which is fixed at any desired distance
from the centre of a disc or plate, which is caused to rotate by means of worm and
worm wheel, or spur or bevil gearing, the motion being taken from the back shaft
or leading screw of the lathe, or by a separate shaft when desirable.
The top part of the rest is made capable of being set at any angle with the axis
of the lathe in the usual way, so that the tool will also have a shaping or slotting
motion at any desired angle with the axis of the lathe.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said George Ernest Sherwin in the Great Seal Patent Office on the
29th October 1881.
GEORGE ERNEST SHERWIN, of Birmingham, in the County of Warwick, Manu-
facturer. "IMPROVEMENTS IN LATHES, AND IN TOOLS AND APPLIANCES FOR
LATHES AND OTHER MACHINES."
The first part of my Invention relates to improvements in lathes for turning
pulleys, wheels, and other articles, and consists in forming or fixing an arm or
bracket on the fast headstock, the said arm or bracket extending to or beyond the
periphery of the faceplate. On this arm or bracket I form a bed at right angles
to the lathe spindle, and by preference horizontal. An ordinary slide rest fits and
slides on this bed to or from the-axis of the lathe, and has the usual self acting or
hand fed motions of an ordinary slide rest carrying the cutting tool or tools. The
bed carrying this slide rest may be either horizontal or vertical, and formed either
on the fast headstock or that part of the lathe bed carrying the fast headstock;
but in all cases it is formed on that part or parts of the lathe behind the face
plate, and for convenience the rest is carried out so as to allow the tool to turn
the periphery of as large a wheel or article as the lathe will admit, as well as
smaller ones.
•
Figures 1 and 2 represent a portion of a lathe containing this part of my
Invention, Figure 1 being a front elevation, and Figure 2, a plan.
A is the fast headstock of the lathe of the ordinary construction; B is the
sliding bed supporting the slide rest carrying the tool C; D is the fixed bed. The
fast headstock A is fixed to the bed D in such a manner that the spindle is
situated at right angles to the said bed, the face plate a (which is only represented
in the plan, Figure 2) being parallel with the bed D. The sliding bed B slides and
works on the fixed bed D to and from the headstock A. The cutting tool C is
also provided with a motion parallel with the spindle of the headstock A. The
sliding bed B is worked by the usual self acting or hand feed motions.
Figure 3 represents an elevation of another method of carrying this part of my
Invention into effect.
In this arrangement the fast headstock E is secured to the fixed bed G, the said
bed G also carrying the sliding bed F. The said sliding bed F slides to and from
the centre of the lathe spindle, having also a motion parallel thereto. The usual
self acting and hand feed motions are imparted by suitable means to the sliding
bed F. The main difference between this arrangement and that represented in
Figures 1 and 2 is that the face of the fixed bed on which the moveable bed F
slides is vertical instead of horizontal.
Lathes provided with this part of my Invention are especially suited to turn
large wheels and pulleys and other disc like articles of large diameter.
The second part of my Invention consists of an angle plate for use with a lathe
or other machine. The body of this angle plate consists of a bed, the. back part of
which is shaped to fit into a recess formed for its reception in the face plate of the
lathe. On the front of this bed an angle plate of the ordinary construction is made
to slide to and from the axis of the lathe, the adjustment being effected preferably
by a screw.
Figures 4 and 5 are respectively an elevation and plan of an improved angle
plate for a lathe constructed according to my Invention. P is the angle plate,
provided with suitable holes p, p, through which screw bolts are passed to fasten

page_text: the articles to be operated upon to the said angle plate. The said angle plate P
slides on the body N, and is adjusted thereon by means of a screw n. On the
back of this N a circular or other shaped projection O is formed, which fits in a
corresponding shaped recess q in the face plate a of the lathe, indicated in dotted
lines in Figure 4. The body N is fixed to the face plate of the lathe by screws.
and screw nuts r, r, Figure 5.
When the angle plate, Figures 4 and 5, is used with other machines, such,
for example, as drilling and planing machines, a base plate T, Figure 6, is provided.
This base plate T is attached to the bed of the drilling or other machine by screw
bolts and nuts at t, t, Figure 6. The angle plate, Figures 4 and 5 is attached to
the base plate T, fixed on the drilling or planing machine by means of the
projection O on the bed N engaging in the recess R, Figure 6. The angular
position of the angle plate P, Figures 4 and 5, on the base plate T is determined
by the screws and nuts r, r, Figure 5, the heads of the said screws engaging.in
the undercut groove S in the base plate T, Figure 6. The position of the angle
plate having been determined it is fixed by tightening the screw nuts u, u, on the
screws r, r. The angle plate when applied to a drilling or other machine has thus
a radial as well as a circumferential adjustment.
The third part of my Invention consists of an adjustable bolt to be used on all
kinds of machines, instead of the ordinary wood packing. This adjustable.bolt
consists of a screwed body or nut, into one end of which a bolt or screw fits for the
purpose of holding or securing this screwed body or nut to the. plate or bed of the
machine. In the other end of this screwed body or nut a bolt or screw fits, and
screws in or out for the purpose of adjustment to the exact height or distance
required. The screwed body or nut is sometimes formed large enough to receive
the adjustable bolt or screw as well as the holding down bolt.
The
Figure 7 represents my improved packing and holding bolt and plate. L is
the screwed body or nut, into which all the bolts screw; M is the screw for
securing the body or nut L to the face plate m of the lathe or bed of other
machine; K is the bolt, which is adjusted in the body or nut L the required
distance from the face plate m for one end of the holding plate J to rest on.
other end of the plate J rests on the article n to be held, and the said plate J is
screwed down tight by the bolt H. The bolt. H may be omitted, and the plate J
be held in position by an ordinary bolt passing through the plate J and the face
plate m of the lathe or bed of other machine.
Having now described the nature of my Invention and the manner in which the
same is to be performed, I wish it to be understood that I claim as my Invention
of "Improvements in Lathes, and in Tools and Appliances for Lathes and other
Machines,"-
First. The improvements in lathes, herein before described and illustrated in
Figures 1, 2, and 3 of the accompanying Drawing, that is to say, forming or fixing
an arm, bracket, or bed on the fast headstock of the lathe at right angles to the
axis of the lathe, the said fixed arm, bracket, or bed carrying a sliding bed
extending beyond the periphery of the face plate for supporting a slide rest carrying
a cutting or turning tool, and provided with the ordinary self acting or hand feed
motions, whether the surface of the bracket, arm, or fixed bed on which the sliding
bed works be horizontal, as in Figure 2, or vertical, as in Figure 3, for the purpose
and substantially as described and illustrated.
Secondly. The improvements in angle plates for lathes and other machines,
herein before described and illustrated in Figures 4, 5, and 6 of the accompanying
Drawing, that is to say, an angle plate capable of adjustment in the direction of a
radius in the case of lathes, and both radially and circumferentially in the case of
drilling and other machines, the said angle plate being fixed to the face plate of
the lathe, or to the beds of drilling and other machines, by the appliances described
and represented.
Thirdly. The adjustable holder or bolt, herein before described and illustrated

page_text: in Figure 7 of the accompanying Drawing, for holding and fixing articles to be
operated upon, either on the face plate of a lathe or on the beds of other
machines.
In witness whereof, I, the said George Ernest Sherwin, have hereunto set
my hand and seal, this Twenty-seventh day of October, in the year of our
Lord One thousand eight hundred and eighty one.
Witness,
GEORGE SHAW.
GEORGE ERNEST SHERWIN. (L.S.)