Improvements in Deal, Log, and Flitch Frames.
Year: 1892

page_text: Date of Application, 22nd Jan., 1892
Complete. Specification Left, 20th Oct., 1892-Accepted, 26th Nov., 1892
PROVISIONAL SPECIFICATION.
Improvements in Deal, Log, and Flitch Frames.
We JOHN KERSHAW and ROBERT KERSHAW, of the firm of Kershaw Brothers,
of Railway Ironworks, Hebden Bridge in the County of York, Saw Mill Engineers,
do hereby declare the nature of this invention to be as follows
The object of our invention is to construct deal, log, and flitch frames, so that
the strain upon the slide or working frame is obviated, and the working space left
open, thus any width of a log may be ent as required.
Upon, and at right angles to a suitable frame, is a slide or working frame; this
slide being operated by disc and connecting rod, placed between the stay bolts and
the slide.
We fix or cast upon the slide at the top, a overhanging head in which is a slot.
At the bottom of and passing through the slide, we employ a suitable rocking frame
or head, in' this head at one end is also a slot, within this slot and the slot of the
top overhanging head, are fixed and adjusted any suitable number of saws, according
to the number of boards or deals required to be cut.
To prevent any strain upon the slide; we attach to the back of the slide at the
top, a second overhanging head, with adjustable tension bolts, these tension bolts
pass' through, and' are attached to, the other end of the rocking frame or head at
the bottom of the slide; or the tension bolts may be dispensed with; and the slide
fixed and operated horizontally or parallel with the frame.
The pressure bars, driving pulley and gearing, are all (in our machine) placed
at the back of the frame.
We also place a flitch table or carriage at side of the machine, so that
flitclies; boards or deals may be cut or sawn as desired from a round tree or log.
Dated this Twenty-first day of January 1892.
JOHN E. WALSH,
Crossley Street, Halifax, Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Deal, Log, and Flitch Frames
We; JOHN KERSHAW and ROBERT KERSHAW of the firm of Kershaw Brothers,
of Railway Ironworks, Hebden Bridge in the County of York, Saw Mill Engineers,
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 our invention is to construct deal, log, and flitch frames, so that
the strain upon the slide or working frame is obviated, and the working space left
open, thus any width of a log may be cut as required..

page_text: Fig. 6. is an end view showing arrangement of friction pulleys and friction
wheel..
Upon a suitable frame A, is a slide or working frame B, this slide being
operated by connecting rod D and disc C, upon the driving shaft C¹ of the
machine.
We preferably fix or cast upon the slide at the top, a overhanging head F
in which is a slot F¹. Within a recess at the bottom of the slide B, is a suitable
rocking frame or head G, pivotted upon a stud G', in this head at one end is also
a slot H, within which and the slot of the top overhanging head, are fixed and
adjusted any suitable number of saws or cutters J, according to the number of
boards or deals required to be cut.
Fixed or cast upon the overhanging head F, is a second overhanging head K,
having stay or tension bolts E, which pass through and arc attached to the other
end of the rocking frame G, the said tension bolts being adjusted preferably by
means of lock nuts E'.
By this means, as the saws are set or adjusted within the slots F1 and H, the
strain or tension caused by such adjustment is (by means of the rocking frame G)
put upon the tension bolts E, thus obviating all strain upon the slide or working
frame B.
Suitable slides L fixed at the top and bottom of the frame A of the machine,
and preferably at the back of the saws, keep the slide in its proper position, and
prevent any side play or strain upon the working frame, which may be caused by
the pressure of the timber against the saws.
Also to keep the saws in a rigid or fixed position within the slots Fl and H, we
preferably place in any suitable position between the same, wood or other suitable
blocks M, these blocks or packing being adjusted and secured by means of screws N,
plates N¹ and nuts N', and vary in thickness according to the thickness of the flitch,
board, or deal required to be cut.
We also employ a suitable flitch frame or table A¹, for carrying the log or tree T
required to be cut, the said flitch table bearing upon a suitable stand or frame T2.
The headstocks or stands T are fitted with cramps T3 at top and bottom, for
holding the timber whilst being cut, the said stands also being preferably moved to
and from the saws by means of screws T', gear wheels T, and hand wheel T.
The log or timber is fed to the saws by means of an eccentric Y, operating a
V lever to which is connected a connecting rod V₁, operating a catch V³, fitting
within the grooved friction wheel V³, this wheel drives by means of gearing V
the shaft P, which in turn drives a gear wheel R, gearing with a rack S upon the
carriage A¹, so feeding the log to the saws.
A back catch V prevents the friction wheel from reversing, while the log is
being cut.
For bringing the carriage back after the log or timber has been cut, and for
adjusting and setting the said log to the saws, we employ a quick return motion
consisting of a rocking shaft U, upon which is secured a forked pivotted lever U',
carrying a second shaft Us, supported by a bracket U from the rocking shaft U
this shaft carries a friction disc or pulley W, so that when the log has been cut,
and the carriage is required to be brought back for the next operation, the catches Vi
and V are thrown back and the friction pulley W brought into contact with and
reversing the motion of the large friction wheel V³, by means of a threaded
spindle W (operated by a hand wheel W2) passing through a bush W³ upon the
pivotted lever U₁ of the rocking shaft U; and as this wheel V³ operates (by means
of gearing V, shaft P, gear wheel R and rack S) the carriage, it is quickly returned
for the next operation.
The shaft U is driven by means of chain wheel W, from the driving shaft C₁ of
the machine.
Should it be found when the carriage is stopped, that the log is not sufficiently
near the saws for cutting, by reversing the hand wheel it disengages the friction
disc W, and brings a second friction pulley X immediately behind, into contact

page_text: with the large friction wheel V³ thus again reversing its motion, and quickly
bringing the said log into position for cutting. The said friction pulley X being
driven by means of a gear wheel gearing with a gear wheel X¹ upon the shaft U
When the log is being fed to and cut by the saws, the friction discs V³ and X,
are (by means of hand wheel W³, spindle W₁ and rocking shaft U) moved out of
gear with the large friction wheel V³, which is then driven by the friction catch V*
as before described.
By our construction of log and deal frames, the driving pulleys U³ and gearing,
are all (in our machine) placed at the back of the frame, so leaving the working
space open.
Also this machine can be used for square log and deal sawing by
means of fluted rollers and down pressure rollers, the carriage A' not being
required.
This construction and arrangement of apparatus may be employed upon
horizontal log, Hitch and deal frames, with the same effect as upon vertical
frames.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
11 -
1. On deal or log frames the use and employment of the overhanging head K,
rocking frame G, and stay or tension bolts E, upon the slide or frame B, as and
for the purposes shown and described.
2. The flitch table travelling in the front of and operated by the log or deal
frame, substantially as shown and described.
3. On deal and log frames, the use and employment of the overhanging head K,
rocking frame G, stay or tension bolts E upon the slide or frame B, carriage A',
head stock T and the quick return motion, operated in the manner and for the
purposes such as shown and described.
Dated this Nineteenth day of October 1892.
JOHN E. WALSH,
Crossley Street, Halifax, Patent Agent for the Applicants.