IMPROVEMENTS IN APPARATUS FOR SHAPING STAVES
Year: 1875

page_text: LETTERS PATENT to Charles Hewitt and Matthew Henry Heys,
both of Swanscombe, in the County of Kent, for the Invention
of "IMPROVEMENTS IN APPARATUS FOR SHAPING STAVES"
"
Scaled the 4th January 1876, and dated the 3rd August 1875.

page_text: sides are cut off at the same time and the proper bulge given to the
stave. The axis of each saw is carried by two bearings, the outer
bearing furthest from the saw is pivotted, and the inner bearing is
capable of sliding on the bed plate of the machine, and has attached to
it a horizontal rod leading back to a cam, as lcrcn-after described
Each axis has on it a fast and loose pulley, the fast pulloy being by
preference next to the pivotted bearing. One or both of the pivotted
bearings is carried in a slide worked by a screw, so that the distance of
the saws from one another, and therefore the centre breadth of the
stave, may be varied at pleasure.
The rear ends of the rods from the sliding bearings are connected
together, and their junction is pivotted to one end of a bent lever
whose middle is pivotted to the frame of the machine, and which has
at its other end a pin which enters a cam surface on the face of a
disc, this disc may be driven by a worm on the axis of one of the saws
or independently. The turning of the disc causes the bent lover to
rock to and fro, thus giving a backward and forward motion to the two
rods to the sliding bearings of the saws, thereby causing the axes of the
saws to incline to each other, and causing the edges of the saws to
recede from or approach each other.
The stave is pushed along the bench and between the saws by a slide
which has a reciprocating motion given to it by a connecting rod from
the revolving disc, which is so arranged that the slide is at the com-
mencement of its stroke (1. c. furthest from the saws) at the time when
the bent lever is at the end of its stroke, and the edges of the saws
therefore at their nearest point to each other; this is the position of the
machine at the commencement of the work. As the stave is pushed
though between the saws the edges of the saws gradually recede from
each other until the middle of the stave is reached, the saws being now
parallel; the edges of the saws then begin to approach cach other,
thereby shaping the second half of the stave m a similar manner to the
first half.

page_text: so as to vary the throw of the cam. In like manner the connecting
rod is so arranged that the throw of the slide can be varied for different
lengths of staves.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Charles Hewitt and Matthew Henry Heys in the
Great Scal Patent Office on the 2nd February 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, CHARLES
HEWITT and MATTHEW HENRY HEYS, both of Swanscombe, in the
County of Kent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thund day of August, in the year of
our Lord One thousand eight hundred and seventy-five, in the thirty-
ninth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said Charles Hewitt and Matthew Henry
Heys, Her special license, that we, the said Charles Hewitt and
Matthew Henry Heys, our exccutors, administrators, and assigns, or
such others, as we, the said Charles Hewitt and Matthew Honry Heys,
our executors, administrators, and assigns, should at any time agrec
with and no others, from time to time, and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN APPARATUS FOR SHAPING STAVES," upon the condition
(amongst others) that we, the said Charles Hewitt and Matthew
Henry Heys, our executors, or administrators, by an instrument in
writing under our or their hands and scals, or under the hand and
scal of one of us or them, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was
to be performed, and cause the same to be filed in the Great Scal
Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that we, the said Charles Hewitt and Matthew
Hey Heys, do hereby declare the nature of the said Invention, and

page_text: in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement thercof,
that is to say.
--
This Invention has for its object improvements in apparatus for
shaping staves
Two circular saws are placed side by side, and such motions are
imparted to them that when a stave is passed between them the two
sides are cut off at the same time and the proper bulge given to the
stave The axis of each saw is carried by two bearings, the outer
bearing furthest from the saw is pivotted, and the inner bearing is
capable of sliding on the bed plate of the machine, and has attached to
it a horizontal rod leading back to a cam, as herein-after described.
Each axis has on it a fast and loose pulley, the fast pulley being by
preference next to the pivotted bearing. One or both of the pivotted
bearings is carried in a slide worked by a screw, so that the distance of:
the saws from one another, and therefore the centre breadth of the stave,
may be varied at pleasure.
The rear ends of the rods from the sliding bearings are connected
together, and their junction is pivotted to one end of a bent lever whose
middle is pivotted to the frame of the machine, and which has at its
other end a pin which enters a cam surface on the face of a disc. This
disc may be diven by a worm on the axis of one of the saws or inde-
pendently. The turning of the disc causes the bent lever to rock to
and fro, thus giving a backward and forward motion to the two rods to.
the sliding bearings of the saws, thereby causing the axes of the saws 1
to incline to each other, and causing the edges of the saws to recedo
from or approach each other.
The stave is pushed along the bench and between the saws by a slide
which has a reciprocating motion given to it by a connecting rod from
the revolving disc, which is so arranged that the slide is at the com-
mencement of its stroke (1 c furthest from the saws) at the time when
the bent lever is at the end of its stroke, and the edges of the saws
therefore at their nearest point to each other; this is the position of the
machine at the commencement of the work. As the stave is pushed
through between the saws the edges of the saws gradually recede from
cach other until the middle of the stave is reached, the saws being now

page_text: parallel, the edges of the saws then begin to approach cach other,
thereby shaping the second half of the stave in a similar manner to the
first half
The amount of traverse given to the saws may be varied by altering
the point on the bent lever which is pivotted to the frame, or by forming
the cam surface of two pivotted plates whose positions can be altered
so as to vary the throw of the cam. In like manner the connecting rod
is so arranged that the throw of the slide can be varied for different
lengths of staves, or pusher lengthened or shortened iu slide box
T Alahat
AU
Tuvantina
MAT
he most fall undovstood and
Figure 1 is a side elevation, Figure 2, a plan, and Figure 3 an end
clevation of our stave cutting apparatus.
a, a, are the two circular saws, whose axes are carried in bearings
b, b, b, b, two of which are pivotted at ', ', and the others sliding
between guides b², 6 Pivotted to these sliding bearings are two rods c, c,
whose other ends are pivotted to the bent lever c¹, one of whose arms
is pierced with holes to receive a pin, about which it swings. By putting
the pin
into the different holes the traverse of the lever can be altered.
The other arm of the bent lever has at its end a pin c² which enters a
cam groove in the disc d. This disc by its revolution causes the saws
to incline more or less to each other, as before explained, e is the
pusher for pushing the stares along the bed to pass them through
between the saws, it is actuated by the connecting rod e¹ and swinging
lever e, which last is caused to oscillate by the pin c³ on the disc d,
ff, are nuts upon slides fixed to the pivotted bearings of the axes of
the saws, they are carried by brackets f',f¹, fixed to the frame of the
machine. By turning these nuts the distance of the saws apart can be
varied, is a flat guide; and 9', a spring guide for keeping the staves
in position as they pass between the saws, their distance apart can be
varied, as shown in Figure 2, by means of the nuts g³.
.
Weighted rollers may be placed above the bed and parallel to it, so
as to prevent the stave from rising These rollers are not shown in the
Drawings.

page_text: Having thus described the nature of our said Invention, and the
manner of performing the same, we would have it understood that what
we claim is, the machine for cutting staves substantially as described.
In witness whereof, we, the said Charles Hewitt and Matthew
Henry Heys, have hereunto set our hands and seals, this
Twenty-second day of January, in the year of our Lord One
thousand eight hundred and seventy-six.
CHARLES HEWITT.
(L.S)
MATTHEW HEYS. (LS)