IMPROVEMENTS IN LATHE-CHUCKS
Year: 1883

page_text: LETTERS PATENT to William Robert Lake, of the firm of Haseltine, Lake,
and Co, Patent Agents, Southampton Buildings London. for an Invention of
姿案
"IMPROVEMENTS IN LATHE-CHUCKS Communicated to him from abroad by
Augustus Burton Wadsworth, of Hopkinton, New Hampshire, United States
of America, Mechanic,
PROVISIONAL SPECIFICATION left by the said William Robert Lake at the
Office of the Commissioners of Patents on the 16th March 1883.
WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake, & C° Patent Agents,
Southampton Buildings, London, "IMPROVEMENTS IN LATHE-CHUCKS" [A com-
munication to him from abroad by Augustus Burton Wadsworth, of Hopkinton,
New Hampshire, United States of America, Mechanic,]
This invention relates to that class of centre rests which are provided with
means for centering or chucking the work, and consists in a novel construction and
arrangement of the parts, as hereinafter more fully setforth by which a simpler
and more effective device of this character is produced than is now in use.
In carrying the said invention into practice I provide a collar or annular support
and a bed-piece, these parts being preferably cast integral or in one piece. A
round sleeve, provided with an annular flange is fitted to work nicely in a
corresponding horizontal hole through the collar, the sleeve being formed with a
bearing and preferably held in position in the collar by an annular plate, and screw
bolts. The flange is provided with a series of radially arranged screws, preferably
four in number, for securing and centreing the work. The plate is also provided
with a like series of screws, which serve as auxiliaries to the other screws, and are
especially useful where the work is uneven in aiding to firmly secure it in
position. I do not, however, confine myself to the use of both sets of screws, as
one set will answer for all ordinary work.
The bed is provided with a longitudinal groove on its lower side and rests on a
plate of corresponding size, said last named plate being provided with a tongue or
spline which works in said groove, and with a central slot.

page_text: The rest is adjustably attached to the lathe by means of a bolt which passes
through said slot and through a hole in the bed, and is secured by a nut.
In doing tapering work the bed, carrying the collar, is moved laterally on the
plate, until in a proper position, and is then secured by the bolt, which may be
provided at its lower end with any suitable means for attaching it to the lathe,
and which also secures the plate, upon the shears or bed of the lathe, notches,
preventing the plate from slipping laterally thereon. The plate, may, however, be
omitted, when the rest is required for straight work only, the lower end of the bolt
being attached to a clamp, or secured in any suitable manner.
In the use of my improvement the shaft, pipe, or other article to be turned,
threaded, cut, or otherwise operated on is simply passed through the sleeve and
centred by the screws, the screws being turned in sufficiently to firmly secure the
work in the rest.
It will be obvious that when used as a centre rest no "spotting" is required on
pieces of irregular shape, and that finished work will not be injured by running
in it. It holds the work firmly to the head-stock centre of the lathe, and at the
same time permits it to revolve as perfectly as when running on the ordinary
centres.
The said improvement is especially useful for cutting off and threading pipes,
cutting off, centreing, turning and finishing up the ends of shafting; fitting up
flange pipe, iron columns, boring lathe spindles, cutting inside and outside screw
threads, finishing the ends of rollers and for other operations.

page_text: in use
In the accompanying drawing,
Figure 1 is a front elevation of a centreing chuck constructed according to this
invention
Figure 2 is a vertical transverse section on the line X, X, Figure 1.
Similar letters of reference indicate corresponding parts throughout the
drawing.
A indicates the collar or annular support and B the bed-piece, these parts being
preferably cast in one piece
A round sleeve C, provided with the annular flange F, is fitted to work freely in
a corresponding horizontal hole through the collar A, the said sleeve being formed
with the bearing d, and being preferably held in position in the collar by the
annular plate D and screw bolts f, f.
The flange F is provided with a series of radially arranged screws H, preferably
four in number, for securing and centreing the work. The plate D is also provided
with a similar series of screws K, which serve as auxiliaries to the screws H and
are especially useful where the work is uneven, in aiding to firmly secure it in
position. I do not however confine myself to the use of both sets of screws H, K,
as one set will answer for all ordinary work
The bed B is provided with a longitudinal groove I on its lower side, and rests
on a plate E of corresponding size, the said last named plate being provided
with a tongue or spline h, which works in the said groove and with a central
slot J.
The rest is adjustably attached to the lathe by means of a bolt G, which passes
through the said slot and through a hole m in the bed B, and is secured by the
nut α.
In doing tapering work, the bed B carrying the collar A is moved laterally on
the plate E until in a proper position and is then secured by the bolt G, which
may be provided at its lower end with any suitable means for attaching it to the
lathe, and which also secures the plate E upon the shears or bed of the lathe, the
notches g, preventing the plate from slipping laterally thereon.
The plate E, may, however, be omitted when the rest is required for straight
work only, the lower end of the bolt being attached to a clamp, or secured in any
suitable manner,
In the use of this improved rest or chuck the shaft, pipe, or other article to be
turned, threaded, cut, or otherwise operated on is simply passed through the sleeve
and centred by the screws H, K, the said screws being turned in sufficiently to
firmly secure the work in the chuck
It will be obvious that when using this improved device no centroing is required

page_text: on pieces of irregular shape, and that finished work will not be injured by
running in it. It holds the work firmly to the head-stock centre of the lathe, and
at the same time permits it to revolve as perfectly as when running on the ordinary
centres.
The improvement is especially useful for cutting off and threading pipes,
cutting off, centreing, turning and finishing up the ends of shafting, fitting up
flange pipes, and iron columns, boring lathe spindles, cutting inside and outside
screw threads, finishing the ends of rollers, and the like.
Having thus fully described the said Invention as communicated to me by my
foreign Correspondent, and the manner of performing the same, I wish it understood
that I claim :-
First. In a device substantially such as described, the combination of the
collar A, the annular plate D, and the sleeve C, the said sleeve having the
bearing d, and flange F, the said flange being provided with means for centreing
the work, substantially as specified.
Second. In a centre rest or chuck, the combination of the collar A, the plate D,
the flanged sleeve C, the set screws H, the screw-bolts f, and the bed B, adapted
for use with a lathe, substantially as set forth.
Third. In a centre rest or chuck for lathes, the slotted plate E, in combination
with the collar-carrying bed B, the bolt G, and the nut a, substantially as, and for
the purpose, set forth.
Fourth. The improved centre rest or chuck consisting of the collar A, the flanged
sleeve C, the screws H, the plate D, the bolts f, the screws K, the bed B, the
plate E, the bolt G, and the nut a; all constructed, combined, and arranged to
operate, substantially as set forth.
: Fifth. In a centre rest or chuck for lathes, the annular plate D provided with
the screws K, substantially as, and for the purpose, specified
1
I In witness whereof I the said William Robert Lake, have hereunto set my
hand and seal this Fifteenth day of September in the year of our Lord One
thousand eight hundred and eighty three.
WM. ROBT. LAKE (L.S.)