Planing Metals on the Lathe by Means of an Attachment in the Shape of a Girder held by the Mandril and the Tail Stock,
Year: 1886

page_text: Date of Application, 12th Mar., 1886.
Complete Left, 9th Dec., 1886.
Complete Accepted, 25th Jan., 1887
Planing Metals on the Lathe by Means of an Attachment in the
Shape of a Girder held by the Mandril and the Tail Stock,
I WILLIAM BALCK of 8 Celia Road Tufnell Park London N. Goldsmith & Jeweller
do hereby declare the nature of my said invention to be as follows:-
I make a casting in the shape of a girder, having a broad foot at the end, & of a
convenient length to go upon the bed of the lathe between the head stock and tail
stock, and at the height of these two latter I drill a hole of the exact size of the
mandril and tail stock barrell in each end of the girder respectively, in addition to
this, at the tail stock end of the casting I form a tongue to go between the shears of
the bed to give greater rigidity.
Upon the girder portion which is made somewhat higher than the centres of the
lathe I attach a tool holder by means of a bolt or bolts passing through holes drilled
through the thin portion of the girder, the tool or cutter being inserted rigidly in this
tool holder, the work or metal to be planed is fixed by any convenient method to the
sliding saddle, and is passed to and fro under the tool or cutter by means of the rack
and pinion used to give the quick motion to the saddle, or the saddle may be moved
along by means of the screwed shaft of the screw cutting lathe.

page_text: .
Planing Metals on the Lathe by Means of an Attachment in the
Shape of a Girder held by the Mandril and the Tail Stock.
I, WILLIAM BALCK of 8, Celia Road, Tufnel Park London N. Goldsmith & Jeweller,
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 following
statement-
In applying my invention to a Screw cutting Lathe (sec Drawing No. 1) I make a
casting of iron in the form and on the principle of a Girder (that is to say a broad web
and a broad flange at top and bottom as shown at a. drawing No. 3 this shape giving
strength combined with lightness) of a convenient length to go between the head and
tailstock of the lathe, the ends of this casting are oxtended so as to form a broad foot
or support (66) of about the width of the lathe bed.
In the one end or support (b) and at the exact height of the lathe centres is drilled
a parallel hole of the exact size of the mandril nose; in the other end (6) is drilled a
conical hole large enough at its outer end to admit the barrel of the tailstock; on
entering the mandril nose in the hole prepared for it in the one foot (b) and screwing
the barrell into the conical hole at the other end (¹) the girder is wedged between the
two stocks and securely attached without bolts. In addition to this is provided at
the tailstock end of the girder a large headed bolt (c) screwed into the foot, the head
of which being turned to fit between the bearers of the lathe further secures the
girder from rocking should it be badly fitted in other ways.. Also at the headstock
end towards the outside are screwed adjusting screws (d) so that the machine may be
raised to secure a good fit in case of wear.
Upon this girder is attached by means of a bolt (e). passing through one of the
several square holes in the web of girder a planer head (f) having the usual.vertical
and quadrant motions, carrying either one or two tool boxes; one set to cut to the
right, and one set to cut to the left the work to be operated upon is passed to and fro
under the two cutting tools, the second tool being set to cut lower than the first and
to produce a smooth surface upon the part already roughly cut by the first tool.
The metal to be planed is attached to the saddle (g) or to a special table () itself
secured to the saddle, by any convenient method, and the necessary motion is imparted
to it either by means of the usual rack and pinion gearing or the ordinary leading
screw always provided with such Lathes.
The feeding of the work up to the cut is arranged by an extension (I see drawing
No. 3) fitted to the outer end of the transverse screw of the slide rest, which bears a
small feed wheel (k) and a long slotted lever (1) on which a double pallet (m) is fitted
to engage with this feed wheel. Upon the back of the Girder at any convenient hole
in the web of it already mentioned a turned stud (n) a few inches long is fitted which
carries a short radius link (o) which may be set in such a manner that a pin fixed in
its end may engage in the slot of the long lever (1), the pin of this radius link being a

page_text: fixture, it follows that when the saddle is moved along the bed the pallet pivoted upon
the long lever will feed the work up to the cut; and as the saddle returns the pallet
will slip over the teeth of the feed wheel.
In applying this invention to the plain Lathes I modify the girder by placing the
web nearer to one side than the other, (sec a' drawing No. 2) thus forming a deep
recess, and the flanges are made broader and formed of a vee shape, and in the recess
is placed a strong rack (p) as shown. Upon this girder is fitted a box or plate (q)
having corresponding veed edges, which embrace the Girder firmly yet with a sliding
fit, inside this box is fitted a pinion (2) engaging in the rack (2) the shaft of which
passes through a sleeve attached to the sliding box; upon turning this pinion by
means of a suitable handle, the box or plate (y) upon which the planer head (f) is
fixed is made to slide along the Girder.
The stud (n) for the feed as described before is fitted on to the back of this plate (y)
instead of on the Girder as mentioned in the description of the Girder for the Screw
Cutting Lathe.
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 :-
The method of planing metals upon the Lathe by means of an attachment in the
form of a Girder running lengthwise of the lathe and the method of holding the same
rigidly solely by the mandril and the Tailstock without bolts or other attachments
being necessary and upon which girder is fixed a planer head holding suitable tools
substantially as herein described and set forth in the drawings.
The method of imparting motion to the work or tools by means of the rack and
pinion or by means of the Leading Screw in connection with the Girder as specified
and described, and the general arrangement and combination of parts as herein set
forth and shewn in the drawings.
WILLIAM BALCK.