IMPROVEMENTS IN THE METHOD OF ACTUATING CROSS-CUT SAWS, AND IN THE MEANS EMPLOYED THEREfor
Year: 1883

page_text: LETTERS PATENT to Joseph Richmond and Walter Whiting both of Kirby
Street Hatton Garden in the County of Middlesex Engineers and Machinists
for an Invention of "IMPROVEMENTS IN THE METHOD OF ACTUATING
CROSS-CUT SAWS, AND IN THE MEANS EMPLOYED THEREfor
"
PROVISIONAL SPECIFICATION left by the said Joseph Richmond and
Walter Whiting at the Office of the Commissioners of Patents on the
24th February 1883.
JOSEPH RICHMOND and WALTER WHITING both of Kirby Street Hatton Garden
in the County of Middlesex Engineers and Machinists "IMPROVEMENTS IN
THE METHOD OF ACTUATING CROSS-CUT SAWS AND IN THE MEANS EMPLOYED
THEREFOR
"
This Invention relates to a means of automatically actuating that class of circular
saw known as the "cross cut" and which is employed for cutting blocks or lengths
of wood across the grain into shorter lengths.
The method now adopted with this class of saw is to mount the saw on a lever
arm vibrating on a lower fulcrum and connecting such lever arm by means of a
connecting rod with a handle which enables the operator when cross cutting a piece
of wood to pull the saw whilst revolving through the same and then pushing the
saw back preparatory for a fresh cut,
The object of the present Invention is to make the advance and return of the
saw automatic in a manner which will enable the said saw to perform a larger
amount of work in the same time and with greater facility than by the old
method
The manner in which we carry our improvements into practice may be described
as follows:-
We mount the circular "cross cut" saw as usual in bearings supported by the
vibrating lever arm before mentioned, but in lieu of pulling such lever over by
hand when cutting, we connect the said lever by rod to a second slotted lever
provided with a sliding block, this second lever has its fulcrum on the bracket
ונ

page_text: supporting a large wheel driven by a pinion on the driving shaft. This wheel is
connected with, and gives motion to the sliding block in the lever transmitting the
vibratory motion to the lever arm supporting the circular cross cut saws, the said
saw being driven so as to revolve continuously by an independent strap The
large wheel whilst revolving does with each revolution give one complete vibration
to the revolving cross cut saw in such a manner that when the saw is advancing to
make its cut such advance is by reason of the movement of the block from its
fulcrum comparatively slow, but the return is quick after the cut has been effected.
The face of the said large wheel is provided with a projection which with each
revolution comes into contact with a tappet on the end of a bell crank or other
form of lever provided with a clip or fork which gives motion for throwing a clutch
out of gear on the driving shaft the said Clutch being thrown into gear by its
connection with a foot lever or other suitable and equivalent means.
The action of the Machine will now be readily understood, at the time the wood
to be cut is placed on the bench over the slot through which the saw advances, the
before mentioned foot lever is depressed which throws into gear the clutch giving
motion to the driving wheels actunting the before mentioned radial lever arm and
saw. Immediately the action commences the large wheel through the medium of
the sliding block and said levers supporting the revolving saw gradually draws
forward the same so as to force and cause it to cut the wood presented to its
action so soon as the full throw of the saw has been completed with about two
thirds of the revolution of the large wheel, the remaining one third revolution does
through the medium of the sliding block give a quick return of the saw to its
original or first portion at which time the swell or projection on the face of such
wheel comes into contact with the tappet on the end of the bell crank lever before
mentioned, the action of which automatically throws the clutch out of gear and
so stops the vibration of the lever arm carrying the revolving saw until the foot
lever is again depressed at which time the cutting operation is again gone through
in manner as before described.
Secondly. We apply through the medium of rollers serated or otherwise which
receive an intermittant motion through suitable gear from the driving shaft an
automatic differential and adjustable feed which will enable the operator to adjust
such feed in a manner which will in unison with the vibration of the saw cause a
determined and regular feed to be given to the block or length of wood to be cut,
the effect of which is that such length or block will be cut up across the grain
into a number of shorter lengths of a given size.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Joseph Richmond and Walter Whiting in the Great Seal Patent
Office on the 24th August 1883.
JOSEPH RICHMOND and WALTER WHITING both of Kirby Street Hatton Garden
in the County of Middlesex Engineers and Machinists "IMPROVEMENTS IN
THE METHOD OF ACTUATING CROSS CUT SAWS AND IN THE MEANS EMPLOYED
THEREFOR
"
This Invention relates to a means of automatically actuating that class of circular
Saw known as the "Cross cut" and which is employed for cutting blocks or lengths
of wood across the grain into shorter lengths
The method now adopted with this class of saw is to mount the Saw on a lever
arm vibrating on a lower fulcrum and connecting such lever arm by means of a
connecting rod with a handle which enables the operator when cross cutting a piece
of wood to pull the Saw whilst revolving through the same and then push the Saw
back preparatory for a fresh cut.
The object of the present invention is to make the advance and return of the
Saw automatic in a manner which will enable the said Saw to perform a larger
amount of work in the same time and with greater facility than by the old
method
In order that the Invention may be well understood and explained in detail we
have hereunto annexed a sheet of Drawings upon which letters of reference are
marked on corresponding parts on all the Figs: alike
DESCRIPTION OF DRAWINGS
Fig 1. represents in elevation a side view of the cross cut Saw apparatus
shewing our improvements applied thereto, and
In these Figs a a is the framing of the machine the circular cross cut Saw
supported in sliding bearings on the bed c the said sliding bearings are connected
by the rods d with the vibrating arın or lever e supported on the fulcrum f which
also form the central shaft from which the Saw b through the medium of the
pullies and endless strap g is driven and so caused rapidly to revolve. The traverse
of the said Saw b. (whilst revolving) on the bed c is automatically caused to
advance and cut the wood presented to its action on the upper bed c¹ and again
retire therefrom in the following manner. The vibrating rod e is connected by the
rod h to the slotted lever i provided with a sliding block this slotted lever has its
fulcrum on the bracket supporting the toothed wheel k driven by the pinion k'
on the shaft m. The wheel is connected with and gives motion to the sliding
block in the lever i and so transmits the vibratory motion to the lever e giving the
sliding action to the circular cross cut Saw b. The large wheel k. with each
revolution gives one complete vibration to the revolving cross cut Saw b. in such a
manner that when the Saw is advancing to make its cut such advance is by reason
of the movement of the block in its upward throw from the fulcrum of its slotted
lever comparatively slow but the return by reason of the block and lever passing
over the top centre of the wheel is quick after the cut has been effected. The
face of the wheel k is provided with a projection o which with each revolution
comes into contact with the tappet p on the end of the bell crank lever q provided
with a projection r in the groove of the clutch a which is also provided on the
opposite side with the clutch fork t the action of which when forced by the
projection throws the clutch 8 out of gear on the driving shaft m and so stops
the traverse of the Saw. The Clutch is with each complete to and fro movement

page_text: of the Saw b. thrown out of gear and so stops the traverse of the Saw. The
starting of such traverse for a fresh cut being effected each time the foot lever v is
depressed so as to throw the clutch into gear.
8
The Action of the Machine on reference to the drawings will now be readily
understood At the time the wood to be cut is placed on the upper bench c¹ over a
slot through which the Saw advances the foot lever vis depressed which throws
into gear the clutch s the action of which gives motion to the pinion & transmitting
thereby through the wheel k and lever i a forward traverse to the Saw for
entering and cross cutting the wood on the bench c¹ presented to its action.
Immediately the Saw in its forward traverse enters on the cut the endless strap g
by reason of the positions of the carrier pullies on the vibrating arm e and the
pulley sliding with and driving the Saw 6 gives such driving strap ga tention'
which tightens as the cut commences and so continues up to the finish and then
Blackens during the time the quick return of the Saw takes place preparatory for a
fresh start and cut thus giving the greatest tention and power during the time of
the cut. Immediately the action of the traverse of the revolving Saw is commenced
by a depression of the foot lever the sliding block of the lever i during two
thirds of the revolution of the wheel & completes the forward traverse of the Saw
and cut of the wood and then with the remaining one third give a quick return
of the Saw to its original position at which time the swell or projection o on the
wheel & comes into contact with the tappet p of the bell crank lever q the action
of which throws the clutch 8 out of gear and so stop the vibration of the lever
arm e and traverse of the revolving Saw. A fresh action and cut being effected
by again depressing the foot lever v.
The driving of the shaft f giving the revolving motion to the Saw b and the
driving of the pinion shaft are by preference connected by gearing so as to be
positively driven thereby enabling the two driving shafts videlicet, the one giving
the circular motion to the Saw and the one giving the transverse to and fro motion
to the same to work in unison.
Having now described the nature of our said invention together with the means
we employ for carrying the same into practical effect we wish it to be understood
in conclusion that what we claim as new and as of our own invention is. -
The novel construction arrangement and adaptation to apparatus giving
motion to cross cut Saws of the mechanism for giving an automatic to and
fro traverse to such Saw in the manner and for the purpose as herein
substantially described setforth and fully illustrated in the drawings annexed.
In witness whereof we have hereunto set our hands and seals this the Twenty
third day of August One thousand eight hundred and eighty three.