DRILL AND LATHE CHUCK
Year: 1885

page_text: "The Graham Manufacturing Company" consisting of the following members,
SIMON PETER GRAHAM, JAMES LITTLE BLAIN, and JOHN BAYNE COOKк, of the
Town of Galt, in the County of Waterloo, in the Province of Ontario, in the
Dominion of Canada, do hereby declare the nature of their invention for " DRILL
AND LATHE CHUCK" and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
This invention relates to a device which may be attached to a lathe or drilling
machine for grasping and firmly holding drills and other boring tools, or for
grasping and holding work to be turned, or for any other purpose for which a
chuck is used.
And this invention consists of improved jaws and slides provided with one or
more inclined flanges on their adjacent sides; of a parallel sleeve provided with a
screw thread on its inner face, and an inward flange in combination therewith;
and also of a chuck in combination with a bar provided with a mortise as will be
bereinafter more fully described and claimed.
Reference being had to the accompanying drawings wherein,
Fig. 1. is a longitudinal sectional view of our Chuck in combination with a bar
provided with a mortise.
Fig. 2. is a cross sectional view of same on the line, x, x, of Fig. 1.
Fig. 3. is a longitudinal sectional view of our improved chuck when constructed
without a bar provided with a mortise.
Fig. 4. is a cross sectional view of same on the line, 2, 2, of Fig. 3.
Fig. 5. is a side elevation of the slide and jaws.
Fig. 6. is a plan view of Fig. 5.
Fig. 7. is a detail sectional view of a bar provided with a mortise.
A, designates the body of the chuck; B, the parallel sleeve provided with a
screw thread extending throughout the whole of its inner face; C, C, the slides
provided with a screw thread on their outer faces; and, D, D, the jaws.
The body, A, of the chuck may be secured to a lathe spindle in any suitable
manner, but it is preferably secured thereto by a screw thread meshing with
Din 627

page_text: another screw thread direct on the lathe spindle as shown in Fig. 3. of annexed
drawings, while in Fig. 1. of annexed drawings, the body of the chuck is left blank
at one end, so as to permit of it being turned to fit the hole of drill or lathe
spindle.
The parallel sleeve, B, is provided at the front end with an inward flange, I,
which covers the front end of the slides, C, and jaws, D, for the purpose of pre-
venting the jaws, D, from moving parallel with the slide, C.
As shown in Fig. 3. of annexed drawings, this parallel sleeve, B, is provided with
sockets, a², in which a lever is inserted to revolve said parallel sleeve, B, which
gives a motion back and forth lengthwise of the chuck, to the slides, C, C, and these
slides, C, C, moving back and forth cause the jaws, D, to move to and from the
centre of said chuck according to the direction in which the parallel sleeve, B, is
revolved.
E, is a nut engaging with a shoulder, a², on the body, A, of the chuck and
screw threaded into the sleeve, B, to retain said sleeve, B, in proper position on the
chuck.
K, is a short bar of metal in which a mortise, F, is formed, this bar of metal, K,
is fitted, driven in and secured in the inner end of the chuck by a pin, J, passing
through the body of the chuck, as well as through the bar, K, this bar, K, provided
with a mortise, F, is for the purpose of holding drills fitted to the same, which holds
the drills when at work, and takes the strain of the drill or other boring tool off the
jaws, D, D, which jaws are only for the purpose of centering the drill and holding
it in position, or this mortise, F, may be formed in the body, A, of the chuck across
the socket of the chuck at the inner end, but the mortise, F, is very much more
readily and easily formed by first cutting it in a short bar of metal, K, and securing
this bar of metal, K, at the inner end of the chuck socket as herein before described.
The mortised bar, K, is not always required in chucks of small sizes, and when
used for light work, as the jaws, D, D, are sufficient to hold the tool or other
article to be turned.
The jaws, D, D, and slides, C, C, are made with one or more flanges, G, G, on
their adjacent sides, between these flanges are the grooves, H, H, the flanges of one
being made to fit in the grooves of the other.
These flanges, G, G, are formed on the adjacent sides of said jaw, D, and slide, C,
at any required angle according to the pressure necessary to firmly hold the jaw to
its work.
The slide, C, is constructed with a flange, b¹, on the upper edge, in order to
give an increased area of wearing surface to the screw thread formed thereon,
which engages with the screw thread on the inner face of the sleeve, B.
Heretofore the jaws of chucks have been made with one incline on their outer
face, which requires the jaw to be much wider at one end than at the other,
whereas, in our jaws, D, one or more inclined flanges, G, G, are arranged on one
side of each jaw which gives the same size in cross section throughout the length of
our jaw, thereby enabling us to make a chuck of very much smaller diameter
which is of great importance, and an advantage to drill chucks when working in
confined positions.
Having thus described our invention We claim
1st The jaws, D, D, of the chuck provided with one or more inclined flanges, G, G,
on each jaw substantially as shown and described and for the purpose specified.
2nd The slides, C, C, provided with one or more inclined flanges, G, G, on each
slide substantially as shown and described and for the purpose set forth.
3rd The jaws, D, D, provided with one or more inclined flanges, G, G, on
each jaw, in combination with slides, C, C, provided with one or more inclined
flanges, G, G, on each slide substantially as shown and described and for the
purpose specified.

page_text: 4th The combination of the parallel sleeve, B, provided with a screw thread on
its inner face, and an inward flange, I, with the slide, C, provided with a screw
thread on its outer face directly over the grip of the jaw on the drill, substantially
as described.
5th In combination with a chuck a bar, K, provided with a mortise, F, sub-
stantially as shown and described and for the purpose specified.
Dated this 1st day of April A.D. 1885.
THE GRAHAM MANUFACTURING COMPANY.
Per Simon Peter Graham,
James Little Blain.
John Bayne Cook.