Improved Means for Facilitating the Adjustment of the Work in Machines for Cutting Key-grooves in Shafts and the like.
Year: 1889

page_text: Date of Application, 6th Aug., 1889
Complete Specification Left, 1st Apr., 1890--Accepted, 17th May, 1890
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PROVISIONAL SPECIFICATION.
[Communicated from abroad by FREDERIC ALONZO SEAVER, of 44, Grand Street,
Hartford, Connecticut, United States of America, Machinist.]
Improved Means for Facilitating the Adjustment of the Work
in Machines for Cutting Key-grooves in Shafts and the like.
I, HENRY HARRIS LAKE, of the firm of Hasoltine, Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex do hereby declare the nature of
this invention to be as follows:-
The object of my invention is to provide a simple and convenient tool by means
of which a shaft or like cylindrical piece of work may be centrally placed with
reference to the cutter of the key-senting or milling tool that is used for the purpose
of cutting a key-slot; and my improved centoring device is particularly useful in
what is known as the Woodruff System of Key Seating.
To this end my invention consists in the combination with a retaining spring
of the angular arms having clamping jaws adjacent to and substantially parallel
to each other, and having also flaring working faces; and a further feature of
improvement relates to the specific combination of the parts by means of which
those spring retaining angular arms with clamping jaws and working faces are held
together and are made practically operative.
The device as a whole is composed of two angular shaped arms each arm being
preferably provided above the angle with a projecting bar that extends through a
mortise or socket in the opposite bar in such manner that the arms, by pressure
upon the other end of these bars, may be given a sliding movement toward and
from each other. The bow-shaped spring is preferably used to connect the arms,
the inner ends of the spring being provided with sockets through which pins or
screws are passed to serve as means of attachment of the spring to the arms; and
the normal operation of this spring tends to hold the arms with their adjacent edges
in contact from the angle to the upper part of the instrument, and these adjacent
edges, that are substantially parallel to each other, form what I call the clamping
jaws.
When the arms are thus closed, their lower portions turn or flare outward and
make with each other a convenient angle of about ninety degrees, and the inner faces
of these flaring portions of the arms are formed flat, or of other convenient outline to
enable them to be applied to the circumference of the cylindrical shaft, and when
applied in this manner a plane common to this meeting plane of the clamping faces
of the arms will be in line with the axis of the shaft.
In using my improved centering tool it is grasped in such manner that pressure
may be applied on the outer ends of the projecting arms so as to push the arms
slightly upward a distance sufficient to attach the tool to the side parts of a rotary
cutter, the resiliency of the spring serving, as soon as the pressure upon the arm is
removed, to clamp the tool upon the cutter. While the tool is thus held on the cutter
a shaft or like cylindrical piece of work may be adjusted in a clamp adapted to hold
the work so that its surface makes contact with both arms of the centering tool, and
when the working faces of the latter arins are tangential to the surface of the shaft
the latter is then clamped, the tool is removed, and the cutter can then be started up,
and if moved directly toward the shaft, or if the shaft is moved directly toward the
cutter the latter will operate to cut the slot radially of the shaft, so that a key fitting
in such slot will be exactly central of the shaft.
Each of the angular arms has what I prefer to call a "clamping-face" and also a
working-face," the clamping faces being those that are held normally in contact
with each other by the spring, and between which the cutter is temporarily grasped

page_text: while the tool is in use, and the latter being the angularly disposed flaring parts that
are adapted to be applied to the surface of a shaft or like piece of work that is to be
centrally placed with reference.to the plane of movement of the cutter.
Dated this 6th day, of August 1889.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improved Means for Facilitating the Adjustment of the Work
in Machines for Cutting Key-grooves in Shafts and the like.
I HENRY HARRIS LAKE, of the firm of Haseltine Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, 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 :—
The object of my invention is to provide a simple and convenient tool by means of
which a shaft may be centrally placed with reference to the cutter of the key-seating
or inilling tool that is used in connection with what is known as the "Woodruff
System" of key-seating; and to this end my invention consists in the combination of
the spring retained angular jaws, and in details of the parts of the device and in
their combination, as more particularly hereinafter described, and pointed out in the
claims.
Referring to the drawings:
Figure I is a front view of my improved instrument.
Figure 2 is a-side view of the same.
Figure 3 is a detail view illustrating the manner of using the tool for the purpose
of centering the shaft in which the key-slot is to be cut.
Figure 4 is a sectional plan of the device.
In the accompanying drawings, the letter a denotes the device as a whole that is
composed of the two angular-shaped arms bc, each arin being provided above the
angle with a projecting bar g, that extends through a mortise or socket in the
opposite bar in such manner that the two arms by pressure upon the other end of
these bars may be given a sliding movement toward, and from each other. A bow-
shaped spring d is preferably used to connect the arms, the inner end being provided
with sockets, through which pins or screws are passed to serve as means of attach-
inent of the spring to the two arms, and the normal operation of this spring. tends to hold
the arms with their upper portion and adjacent edges in contact, as shown in Fig. 1
of the drawings. When the arms are thus closed, their lower portions turn or, flare
<outward and make with each other a convenient, angle of about ninety degrees, and
the inner faces of these flaring portions of the arms are formed flat, or of other
convenient outline, to enable them to be applied to the circumference of a cylindrical
shaft, and when applied in this manner a plane passing between the upper part of the
arms will also be in line with, the axis of the shaft.
In using my improved device which is grasped in such manner that pressure.may
ibe applied on the outer ends of the projecting arms bc so as to push them slightly
apartia distance sufficient to attach the two to the side parts of the cutter e, the
resiliency of the spring serving, as soon as the pressure is removed,,to,clamp the
tool upon the cutter in the position indicated in Fig. 3 of the drawings. While
the tool is thus held on the cutter, the shaft may be adjusted in a clamp adapted to hold
the work so that its surface; makes contact with both arms of the tool, and when the
latter arms are tangential to the surface of the shaft the latter is finally clamped,
the tool removed, and the cutter can then be started up, and if moved directly
toward 'the shaftiwill operate to cut the slot radially, so that the key will be exactly
central of the shaft.
'66
+
Each of the angular arms,b,c has what may be called a "clamping face" and a
working face," the clamping faces being those that are held normally in contact
i

page_text: with each other by the spring, and between which the cutter is temporarily grasped
while the tool is in use, and the latter being the angularly disposed flaring parts
that are adapted to be applied to the surface of a shaft or like piece of work
that is to be centrally placed with reference to the plane of movement of the
cutter.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondent I declare that what I claim is:
baving the adjacent
1. In combination with a retaining spring, the angular arms
clamping jaws with the flaring working faces, all substantially as described.
2. In combination with angular arms having clamping faces and the angularly
disposed working faces, the cross bar uniting the two arms, and the spring operating
to normally hold the clamping faces of the arms in contact, all substantially as
described.
3. In combination, the angular arms having the clamping faces and the angularly
disposed working faces, the cross-bars fast to one of the arms and projecting beyond
the opposite arm, and the retaining spring, all substantially as described.
Dated this 1st day of April 1890.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.