similar Purposes.
Year: 1889

page_text: Date of Application, 26th Mar., 1889
Specification Accepted, 18th May, 1889
for similar Purposes.
1, 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 this invention is to provide an improved. cutter-head and adjustable
tube and boiler sheet cutting tool for metal work, which will permit the tool to be
adjusted to the size of a hole required to be cut, and to be replaced when broken or
worn out, at much less cost than heretofore.
The invention consists in a peculiarly formed cutter-head adapted to carry two
cutters, as well as a center drill or reamer, which serves also as a centering tool
and in certain combinations of parts thereof, substantially as will hereinafter set forth
and finally embodied in the clauses of the claim.
Referring to the accompanying drawings in which like letters of reference indicate
corresponding parts in each of the several figures, Fig. 1, is a front view of an
improved cutter-head with centering and double cutting tools embodying my
improvement, with a portion broken away.
Fig. 2, is a top view of the same: Fig. 3, is a section through line, Fig. 2.
Figs. 4, and 5, are detail views of the cutter; Fig. 6, is a section through line y,
Fig. 4. Fig. 7, is a front view of a cutter head when the cutting tools are fixed in
position in slots; Fig. 8, is a top view of the same; Figs. 9, and 10, are detail views
of a centering tool; Fig. 11, is a view of a cutter stock and, Fig. 12, is a section
on line 2, Fig. 8.
In said drawings, a represents a cutter-head with extending shank, a¹, made integral
therewith, and having arms, b, & extending in a line so as to bring the center of
the shanks in a diametrical line with the center of the hub and thus bring the cutting
points of the cutter a little in advance, c, c. Figures 1, and 2, are elongated slots in
said arms, in which are secured cutter stocks, d, d; e, e, are slots near one end of
said stocks, in which are secured the cutters, and the outer ends, where they extend
heyond the cutter-head, are made smaller and threaded, so as to receive washers and
threaded nuts, ff, for securing said stocks to the cutter-head arms; g,g, are cutters,

page_text: with cutting points g', as seen in Fig. 2. and the portion in the rear of the cutter
point is curved in the segment of a circle according to the size of the hole to be cut,
and whose center is the center of the cutter-head, the outer curve of the cutter, being
of greater circle than the inner curve of the cuiter, so that the same cutter, can be
used for holes varying in size from the diameter of the inner circle of the cutter, to
that of the outer circle of the cutter.
These cutters are provided with shanks, g², g², which fit closely into the slots in the
cutter stocks, and have shoulders g³, 93, formed on the back, and resting against the
cutter-head, as seen in Figures 1, and 7, or extending along the side, so as to keep
the cutter steady and hold it firinly in an upright position; in the front and in the
center of the cutter-head, is a socket, h, in which is fitted the shank of drill, i, as
shown in Figs. 7, and 8, or the shank of a reamer, j, as shown in Figs. 1, and 2,
and those center tools are held firmly in said sockets by set screws, k, k.
In the form shown in Figs. 7, and 8, transversed recesses, m, m, are cut in the
outer arms, at any desired distance apart, and slots, n, n, are formed, open at one end,
as seen at Figs. 7, and 8. The cutter stock is constructed similar to the one above
described, the shank of the cutter being made to fit snugly in the recess, m, of the
cutter head and the cutter stock, while the cutter is held firmly in place by washer
and nut, as before described.
By the use of my improved cutter head and arms, in the form shown in Figs. 1, 2, & 3,
the cutting tool can be adjusted so as to cut a hole of any desired size, by simply sciting
the tools on each of the arms at a distance from the center of the cutter-head equal to
half the diameter of the hole to be cut.
In the form shown in Figs: 7, and 8, the recesses are cut at any desired distance
from the center of the head, and each recess can be marked so that a hole in any one
of the sizes can be cut, by securing the tool in the designated recess.
By constructing the arms in the manner described, they are reinforced on the rear
of the cutting tool, and are thus made stronger and able to bear a greater strain.
The cutter blank is made to conform to the are of the circle of the hole to be cut,
and the shoulder formed on the back edge, as described, renders it impossible for the
cutter to work up while the hole is being cut.
The center drill tool is employed when the cutter head is to be used in a drill
press, driven by steam power, or any other way than by hand, and in fact combines
at one operation a drill and a centering tool, drilling the center hole and acting as a
centering guide for the cutting tool.
In adjusting the drill in the cutter-head, it should project far enough from the plane
of the cutter head, so as to drill a hole in the place to be cut, before the cutting tool
begins to work, so as to serve the purpose of a centering tool while the cutting tools are
performing their work.
The reaming center tool or milling tool, is employed when the cutter head is to be
used with a ratchet lever by hand, and when thus used serves the same double purpose,
as the drill, as before shown; but with the hand machine I prefer to drill the center
hole, first by a drill, and then substitute the milling tool for the drill, as when used in
this way, the operation is as follows: The area of the cutting edge, on the milled
center tool, being less than that of the two cutters on the arms, the milled center tool
does not cut as fast as the two cutters, and thus exerts a continual and even pressure
on the piece to be cut out, thereby relieving the cutters on the arms from unequal
strain, and moreover preventing the point of the cutter from catching or digging which
generally breaks the point of the cutter.
When power is to be employed, the drill center tool is secured in the center of the
cutter head by the set screw the shank of the cutter head, which can be made of any shape
desired, is fitted and secured, in the ordinary way to the spindle or socket of the drill
press, the cutters are then adjusted on the arms, to the diameter of the hole to be cut,
and firmly secured by the washer and nut, as before described; the piece is then cut
out at one operation, the drill serving at the same time as a cutting too!.
In cutter-heads as ordinarily constructed, the tool can be used only in one circle
and numerous cutter-heads are required when holes of so many different sizes are to

page_text: be cut, and when the cutters in these heads break, the ends of the heads generally
break off with it; causing large expense and loss of time.
With my improved cutter head, the cutters are easily adjusted to any desired
position, and when broken, can quickly be replaced, with very little loss of time and
a small expense.
Having now particularly described and ascertained the nature of my said invention
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 :—
1. The improved cutter head herein described, consisting of a hub, a a shank made
integral therewith, a drill or a reamer adapted to fit in a socket in the center of said
hub as a center guide arms extending from said hub as described, longitudinal slots
in said arms, cutter stocks adjusted in said slois, and means for securing them to
said arms, slots in said cutter stocks, adapted to receive the shanks of the cutters,
and cutters formed as described, and provided with shanks adapted to fit in the
slots in the said cutter stocks, substantially in the manner as and for the purpose
set forth.
2. The improved cutter head herein described, consisting of a hub, a shank made
integral therewith, a drill or reamer adapted to fit in a socket in the center of said
head, as a center guide arms extending from said hub as described, longitudinal slots
in said arms, cutter stocks, adapted to fit in said slots, and means for securing them
to said arms, slots in said cutter stocks, adapted to receive the shanks of the cutters,
formed as described, and provided with shanks adapted to fit in the slots in the
cutter stocks, and transverse recesses in said, arus, adapted to receive and hold
the shanks of said cutters, substantially in the manner as and for the purpose set
forth.
3. The improved cutter head, having arms extending from the hub, as described, so
as to bring the cutters on a diametrical line with the hub and provided with slots,
parallel to the edges of said arms, cutter stocks secured in said slots, and curved
cutters secured in cutter stocks. substantially as and for the purposes set forth.
4. In a cutter head, provided with extending, slotted or recessed arms, a cutting
tool curved in the form of a segment of a circle as described, and provided with a
shank and means for securing said cutting tool to said arm, substantially as described,
and for the purposes set forth.
5. In a cutter head provided with a central socket and extending, slotted or recessed
aras, a drill or reamer secured in said central socket, as a center guide, and cutting
tools curved in the form of a segment of a circle as described, and provided with
shanks, and means for securing said cutting tools to said arms, substantially as
described and for the purposes set forth.
6. In a cutter head provided with extending slotted or recessed arms, a cutting tool
formed in the segment of a circle, of the size of the hole to be cut, and provided with
shanks, and shoulders formed on said shanks, and means for securing said cutting
tools to said arms, substantially as described and for the purposes set forth.
7. The combination with a cutter-head provided with a central socket, and extending,
slotted or recessed arms, of a drill or reamer and center guide, curved cutting tools,
said cutting tools being provided with shoulder shanks, and means for securing said
drill, or reamer and cutting tools to said cutter head, substantially in the manner as
and for the purposes set forth.
Dated this 26th day of March 1889.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.