Year: 1886

page_text: Date of Application, 22nd May, 1886.
Complete Left, 5th Feb., 1887.
Complete Accepted, 8th Mar., 1887..
[Communicated from abroad by JOHN HENRY WHITAKER, of Davenport, in the County
of Scott, and State of Iowa, United States of America, Builder.]
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of 55,
Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of this Invention to be as follows:-
This Invention is in the nature of an improvement, in cylindrical sawing machines
in which the teeth are formed on the edge of a cylinder, and the principal object of
which is to economize the cutting of mouldings.
Upon the cross-bars of a frame are mounted boxes, in which is journaled a hollow
horizontal mandrel having at the end a rigidly attached cylindrical saw. The journal
boxes are composed of a fixed base section having a half round bearing in it of a
diameter to fit the mandrel with an upper section block on each side of the mandrel
and extending above the middle line of the same and a top section or cover which is
common to both boxes and also forms a cover to the mandrel where it projects above
the table.
At the end of the mandrel opposite to the saw there is a casting or projection bolted
or screwed to the frame or journal box to which casting is fastened a trough which
extends inside the mandrel to a point near the saw in the form of a tube. The object
of this is to receive and guide the cut strip of lumber and allow it to pass out with-
out frictional contact with the revolving mandrel.
The mandrel is driven by a belt running around a depressed or recessed portion
of the mandrel about its middle and beneath the cover, the belt being kept tight by
a tension regulator.
The table of the machine is hinged to the frame-work on one side so that it may be
turned back to give access to the saw and its mandrel. On the opposite side from its
hinges, the table rests upon set screws, by which the table may be set higher or lower
in relation to the saw. A groove or trough is made on top of the table in line with
the saw and a gauge is arranged at its side and is rendered adjustable by a slot and
set screw.
To permit the teeth of the saw to be more conveniently sharpened the machine is at
one side provided with hinges that secure it to the floor and by which the machine
may be turned up on end for more convenient access to the-saw.
A. MELVILLE CLARK.
By A. M. & Wm. Clark.

page_text: COMPLETE SPECIFICATION.
'Improvements in Sawing Machines.
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of 53,
Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent Agents,
do hereby declare the nature of this Invention (a communication to me from abroad
by John Honry Whitaker (Builder) of Davenport in the County of Scott, State of
Iowa, United States of America) and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement :-
This Invention is in the nature of an improvement in cylindrical sawing machines
in which the teeth are formed on the edge of a cylinder; and the principal object of
which is to economize the cutting of mouldings.
The Invention consists in the peculiar construction and arrangement of parts which
I will now proceed to describe.
Reference is to be had to the accompanying drawings forming part of this specifi-
cation wherein Figure 1 is a vertical section at right angles to the saw mandrel;
Figure 2 is a vertical section longitudinally through the saw mandrel: Figure 3 is
plan view of the cylindrical saw, its bearings and cover; and figure 4 is a view in
perspective of the same parts. Similar letters of reference indicate the same parts in
all the figures.
A represents the frame work of the machine which has at the top two cross bars B B
upon which are mounted the boxes B B in which is journaled the hollow horizontal
mandrel having at the end the rigidly attached cylindrical saw D. The journal
boxes are composed of a fixed base section having half round hearing in it of a
diameter to fit the mandrel, with an upper section block on each side of the mandrel
and extending above the middle line of the same, and a top section or cover C¹
which is common to both boxes and also forms a cover to the mandrel where it projects
above the table. This cover and the upper section blocks are held down, to keep
the mandrel in place, by screws d. At the end of the mandrel opposite to the saw,
there is a casting or projection & bolted or screwed to the frame or journal box, to
which casting is fastened a trough e which extends inside the mandrel to a point near
the saw in the form of a tube e¹. The object of this is to receive and guide the cut
strip of lumber and allow it to pass out without frictional contact with the revolving
mandrel. Around the depressed or recessed portion of the mandrel, about its middle,
is fitted the endless belt E driven by a pulley E' on a shaft E2 in the frame-work
below, and which shaft has a pulley E3 that derives its power through a belt from
any suitable source. A tension regulator E always keeps the belt tight. F is the
table of the machine which is hinged to the frame work on one side so that it may
be turned back to give access to the saws and its mandrel. On the opposite side from
its hinges the table rests upon set screws G G which are tapped through lugs on the
framework and by which the table may be set higher or lower in relation to the saw.
A groove or trough g is made on top of the table in line with the saw, and a gauge H
is arranged at its side and is rendered adjustable by a slot and set-screw.

page_text: To permit the teeth of the saw to be more conveniently sharpened, the machine is
at one side provided with hinges that secure it to the floor, and by which the
machine may be turned upon end for more convenient access to the saw.
Having now particularly described and ascertained the nature of the said Invention,
and in what manner the same is to be performed, I declare that what I claim is ;
1st. The combination with the tubular saw and its hollow saw mandrel, of a hollow
or tubular stock guide extending into the saw mandrel and fitting closely to its
inner walls and a support for the same rigidly connected to the frame work outside
the mandrel, substantially as shown and described.
2nd. The combination with the tubular saw and its hollow saw mandrel recessed upon
its outer periphery to receive the driving belt, of a cover C for the same extending
over the top of the saw mandrel and covering and protecting the belt from the contact
of the sawed stock, as set forth.
3rd. The combination with the tubular saw and its hollow saw mandrel recessed
upon its outer periphery to receive the driving belt, the journal boxes composed of
stationary sections and removable block , and the saw-mandrel cover C¹ secured by
the same bolts that pass through the sections b', of the journal boxes, as described.
A. MELVILLE CLARK.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.