Improvements in Portable Apparatus for Cutting Key Seats in Shafting.
Year: 1895

page_text: Date of Application, 23rd July, 1895-Accepted, 14th Sept., 1895
COMPLETE SPECIFICATION.
Improvements in Portable Apparatus for Cutting Key Seats in
Shafting.
We, LEON LAKE, of No. 1645 North Tenth Street, Manufacturer, and
HARRIETT ISABEL LAKE, Married Woman, of No. 3046 Burke Street, both
in Philadelphia, State of Pennsylvania, United States of America, 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:—
Our invention has for its purpose the provision of a portable key-seating
mechanism, which shall be adapted to operate upon shafting placed in any position,
or of any diameter, the seat-forming devices having an automatic feed movement
and being so controlled as to insure the formation of the key-seat in parallelism
with the axis of the shaft operated upon.
To these ends our invention consists in the novel features of construction and
new combinations of parts hereinafter fully described.
To enable those skilled in the art to which our invention pertains to fully
understand and to make and use the same, we will proceed to describe the said
invention in detail, reference being had, for this purpose, to the accompanying
drawings, in which
Figure 1 is a plan view, showing a portion of a shaft, with our key-seating
mechanism mounted thereon.
Figure 2 is a side elevation of the same, partly in section.
Figure 3 is a transverse view partly in section upon the line y y Figure 1.
Figure 4 is a transverse section upon the line x-x Figure 1 said mechanism
being shown as mounted on a large shaft.
Figure 5 is a detail section showing a slight modification in construction, and
Figure 6 is a plan view of the parts shown in Figure 5.
The reference numeral 1, Figures 1 and 2 in said drawings, indicates a portion,
or section, of shafting, of any given diameter and arranged at any point where
shafting is ordinarily used.
.
The numeral. 2 denotes the main supporting base of our key-seating mechanism,
said base being provided with opposite jaws 3, inclined toward each other and
rising above the said base 2. Upon each side of the base 2, and projecting below
the same, are divergent, or outwardly inclined jaws 4, Figures 3 and 4 which are
adapted to straddle the shaft, each being provided with a bifurcated joint 5, to
permit the pivotal attachment thereto of the ends of a yoke 6, which is provided at,
or near, its central portion with a boss, or enlargement 7, through which is tapped
a set-screw 8, its end being adapted to bear against the shaft and lock the supporting
base 2 rigidly thereon at any required point.
Upon the base 2, and arranged between the converging jaws 3, is a slide 9
which is capable of longitudinal movement in a line parallel with the axis of the
shaft. Upon one end of said slide is a vertical dove-tailed block 10, upon which
is mounted a slide 12, arranged at right angles to the line of movement of the
slide 9, or perpendicular to the axial plane of the shaft 1. Upon the lower end
of the slide are bearings 15, for a transverse shaft 16 Figures 1 and 3. Upon this
shaft, between the. bearings 15, is mounted the seat-cutting tool 17, which is
operated through a large spur-gear 18, on the end of the shaft, and a pinion 19

page_text: upon a short, shaft or stud 20, rigidly mounted on a bracket, ac 14, which forms
part of the slide 12. The prolonged; hub of this pinion is provided with a crank 21,
or other suitable means for producing revolution. A sprocket 22 is mounted on
the hub of the pinion 19 and geared by a sprocket chain 23 to a second sprocket 24,
carried by a transverse shaft 25, which is supported in bearings 26, the latter being
formed at the extremities of lateral brackets 27 at the end of the slide 9 opposite
that carrying the dove-tailed block 10. Said shaft 25 is provided with a worm 28,
meshing with a worm-gear 29, Figure 2, which is mounted on the end of a
central, threaded shaft 30, lying in the longitudinal line of the slide 9.
The
threads of the shaft mesh with a feed-nut 31, seated in the supporting base 2.
The feed-nut is capable of vertical adjustment. by means of a lever 32, Figures 3
and 4 having its fulcrum in a transverse recess 33 on one side of the supporting
base 2, from which its end projects sufficiently to enable it to be operated. The
other extremity of said lever lies in a notch 34 in the feed-nut. When, the
projecting end of the lever 32 is pushed downward and the feed-nut raised into
mesh with the threaded shaft 30, it is held in engagement by a spring-pressed
bolt 35, the rounded end of which enters a concave recess in the side of the nut.
Sufficient power is easily exerted by the lever 32 to drive the bolt out of said
notch and press the feed-nut, down, thereby withdrawing it from. operative
engagement with the threaded shaft:.
The sprocket 24 is. uormally loose upon the shaft. 25 and is. operatively
connected therewith by a clutch-bolt 36, carried by a bearing 37 which. forms.
part of a collar 38 fixed on the shaft. By retracting the clutch-bolt the sprocket
is operatively disengaged from the shaft and the latter may then be turned by
a hand-wheel 39, or other suitable means;, on the other end of the shaft 25..
The front of the slide 12 projects sufficiently to provide: a. vertical guide for a
slide 40, which forms part, of, a. bracket. 41 adapted to straddle the shaft. in front
of the cutter, a yoke 42, being provided to surround, the shaft,. it3, construction, and
the set-screw 43 for securing it, being substantially similar to the yoke 6 and
set-screw. 8. A slot 44. is formed in the upper part, of the bracket which. projects
in front of the slide 40, and in said slot lies a thumb-screw. 46, the end.of which is
tapped into the slide 12, as seen in. Figure 2. By turning the thumb-screw, half a
revolution in one direction the; bracket is released, while a like turn in the opposite
direction binds it firmly.
The slide 12 is fed downward, as the cutter forms the, seat, by means of a
screw, 47, supported in a yoke-frame 48, and provided with a hand-wheel. 49. The
block 10 may be graduated, as shown in Figure 3, to indicate the depth of cut.
The, seat-cutting tool 17 is keyed upon its shaft, and retained in position between
the two, bearings. 15 by washers, or short sleeves 50. Two or more: cutting-tools
may be placed upon the shaft together, when the width of the key-seat requires,
and in such cases the washers or sleeves 50 will be interchangeable. A plug 51 is
tapped into the end of one of the bearings 15 to hold the shaft in proper position
and prevent any, longitudinal play.
The yokes 6 and: 42 may be replaced by extension yokes 52, see Figure.5. which
only differ from those described by having an additional,.pivotally.connected.link.53
and a cross-brace 54, having a central opening. for the set-screw, which is steadied
and braced thereby.. The link 53, is connected to the yoke at one end by a
removable pin 55. The cross-brace; 54: is, forked: at, one end,. to straddle a
supporting pin 56. When used upon shafts. of, such diameter, as to require the
maximum capacity of the yoke, the cross-brace may be disconnected at, its forked
end and. allowed to hang from, its other pivotal support, or it may be wholly
removed, as in Figure 4..
When, the machine is placed upon the shaft, the yoke 42 is rigidly clamped
thereto and the bracket. 41 is secured to the slide. 12. The set-screw, 8 is, then
lousened and the yoke 6 and supporting base are moved to the farther extremity
of the slide, the feed-nut 31 being previously forcedt downward, out of mesh with
the threaded shaft 30. When in proper position, the set-screw. 8; is, turned. into

page_text: clamping engagement with the shaft, the set-screw 43 is loosened, to release the
yoke 42, and the machine is operated, passing over the same line of work as many
times as may be necessary in order to cut the seat to its required depth.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
1. In a portable machine for cutting key-seats in shafting, the combination with
a supporting base, of means for clamping the same upon a shaft, a slide movable
in said base and carrying the cutter-shaft, an independent yoke and set-screw
forming a vertically adjustable attachment ou brackets on the slide, a longitudinal
threaded shaft mounted on the slide, a vertically movable feed-nut, and means
for throwing said feed-nut out of and into mesh with the threaded shaft, substantially
as described.
2. In a portable machine for cutting-key-seats in shafting, the combination with
a supporting base, of a yoke detachably connected thereto, a set-screw tapped
through the yoke to bear against the shaft, a slide carrying the cutter-shaft, and
an independent yoke and set-screw forming a vertically adjustable attachment on
brackets of the slide, substantially as described.
3. In a machine for cutting key-seats in shafting, the combination with a
supporting base, of a slide movable in jaws forming part of said base, a cutter-
shaft vertically adjustable in jaws on the end of said slide, a threaded shaft in
bearings on said slide, a vertically movable feed-nut arranged in a seat in the base,
means for moving said feed-nut, a lever having its point lying in a recess in said
feed-nut, and gearing connecting the cutter-shaft with mechanism for operating
the threaded shaft, substantially as described.
4. In a portable machine for cutting key-seats in shafting, the combination with
a supporting base and with means for clamping the same to the shaft, of a slide
carrying the cutter-shaft, a longitudinal threaded shaft in bearings on said slide, a
vertically movable feed-nut arranged in a seat on the supporting-base, a lever
having its point lying in a recess in said feed-nut, and a spring-pressed bolt
engaging a notch in the same, substantially as described.
5. In a portable machine for cutting key-seats in shafting, the combination with
a supporting-base, of a yoke having an extension link pivotally connected therewith,
a cross-brace having its ends connected to said link and to the opposite side of
the yoke, and a set screw tapped through the middle part of the yoke and lying in
a seat in the cross-brace, its end abutting against the shaft, substantially as
described.
Dated this 23rd day of July 1895.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants.