Improvements in or in connection with Moulding or Planing Machines.
Year: 1896

page_text: Date of Application, 8th Apr., 1898-Accepted, 9th May, 1896
COMPLETE SPECIFICATION.
Improvements in or in connection with Moulding or Planing
Machines.
A communication by CHARLES CRISTADORO, of St. Paul, in the County of
Ramsey, and State of Minnesota, United States of America, Manufacturer.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool, and 6, Bank Street,
Manchester, both in the County of Lancaster, 118 New Street, Birmingham,
in the County of Warwick, and 322, High Holborn, in the County of Middlesex,
Civil Engineer, 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 :-
This invention relates to improvements in cutter heads for moulding and planing
machines, its object being to provide a head to receive plane surfaced knives,
held in such position that the knives give reversed shearing cuts to the stock.
To accomplish this improved result the head is provided with plane surfaced faces,
all of which stand at the same angle with the axis, but in reversed position with
relation thereto, alternating either singly or in pairs, the knife carrying edge of
each face conforming to the outline of the section of a cylinder axial with the head
cut by the plane of the face. The moulding head for convenience in aligning the
knives has the opposite faces preferably parallel, while the plane cutter head is
preferably formed with the opposite faces standing at opposite angles with
the axis.
The planing cutter head is made of any desired length by the use of longitudinal
as well as circumferential series of faces and knives, the knives of the longitudinal
series preferably being arranged on alternating faces and with overlapping ends,
so as to cover the entire surface being worked.
In the accompanying drawings,
Figure 1 is a side elevation of a moulding cutter head;
Figure 2 is an end elevation of the same, looking in the direction of the
arrow;
Figure 3 is a cross section on line x-x of Figure 1, looking in the direction of
the arrow;
Figure 4 shows diagrammatically side and end elevations of a cylinder of the
dimensions of the head and the sections of the planes of the faces of the head;
Figure 5 is a sectional detail of one of the knives and connected head;
Figure 6 is a side elevation of a simple planing cutter head;
Figure 7 an end elevation of the same;
Figure 8 is a cross section of the same on line y-y of Figure 6 looking in the
direction of the arrow;
Figure 9 shows diagrammatically side and end elevations of a cylinder with the
lines of the planes of the faces ;
Figure 10 is a side elevation of a compound planing cutter head;
Figure 11 is an end elevation of the same looking in the direction of the
arrow;
Figure 12 is a cross section of the same on line x-x of Figure 10, looking in
the direction of the adjacent arrow, and,
Figure 13 is another cross section on line y-y looking in the direction of the
adjacent arrow.

page_text: In the drawings, A represents the moulding cutter head, B a simple planing
cutter head with a single circumferential series of faces, and C a compound planing
cutter head made up of a series of simple heads arranged upon a common shaft
with the adjacent ends of the knives overlapped, and 2 the carrying shaft. Each
head is formed from a cylinder axial with the shaft, and is provided preferably as
shown with four plane faces. In the head A, the faces 3 and 5, and 4 and 6 are
respectively parallel with each other, but those of the different pairs stand at equal
but opposite angles with the axis or shaft, while the respectively opposite faces 12
and 14, and 13 and 15 of the heads B and C are parallel but oppositely and
equally inclined to the shaft. In each face is arranged a dovetailed or inverted
Tshaped groove 7, adjacent the forward edge of the face and approximately
parallel with its chord, into which are slidably fitted the heads of the bolts 8 for
securing the knives 9 in place, the knives being provided with transverse slots 10
to receive the bolts. By these means the knives may be accurately adjusted both
longitudinally and laterally, and secured in adjusted position by the nuts 11.
The head C may be made integral, or with its similar sections X, which are
each substantially the same as the head B, independent, but arranged in a series
on a common shaft with the ends abutting, whereby a head of any required length
may be built up. In this construction the knives 9 are made slightly longer than
the sections and preferably only two knives are placed upon a section, the knife
carrying faces of the several sections alternating. By this means the adjacent
ends of the knives of the longitudinal series overlap, so that the surface of the
stock is entirely covered by the knives.
. In operation the knives enter the stock with a shearing cut, alternating, either
singly or in pairs, first in one direction, and then in the other, so as to successively
smooth the preceding cut. Thus with the ordinary speed of such tools a knotty
piece of stock is shaped without gouging or tearing and given a glossy finish.
Having now particularly described and ascertained the nature of the 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 :-
1. A cutter head formed with plane surfaced knife carrying faces, standing at
equal but opposite angles with the axis.
2. A cutter head having a series of plane surfaced faces arranged at equal
but alternately opposite angles with its axis, the knife carrying edge of each face
having substantially the curve of its cylindric section.
3. A cutter head having plane surfaced faces at equal but opposite angles with
the axis, and provided with longitudinal bolt channels, and the knives adjustably
secured thereon by bolts passing therethrough and engaging said channels, with all
points in the knife edges equidistant from the axis.
4. In combination a cutter head having longitudinal and circumferential series
of plane surfaced knife carrying faces, all said faces standing at equal angles with
said axis, the alternating faces in the circumferential series standing in reversed
position with reference to said axis, the plane surfaced knives fitted to said several
faces, those in the longitudinal series overlapping each other, and all points on the
edges of all said knives being equidistant from the axis.
Dated this 7th day of April 1896.
WM. P. THOMPSON & Co.,
Agents.