AN IMPROVEMENT IN THE CONSTRUCTION OF CIRCULAR SAW BENCHES
Year: 1868

page_text: LETTERS PATENT to Allen Ransome, of King's Road, Chelsea, in
the County of Middlesex, Saw Mill Engineer, for the Invention
of "AN IMPROVEMENT IN THE CONSTRUCTION OF CIRCULAR SAW BENCHES."
Sealed the 9th April 1869, and dated the 30th November 1868.
PROVISIONAL SPECIFICATION left by the said Allen Ransome at the
Office of the Commissioners of Patents, with his Petition, on the
30th November 1868.
I, ALLEN RANSOME, of King's Road, Chelsea, in the County of
Middlesex, Saw Mill Engineer, do hereby declare the nature of the
said Invention for "AN IMPROVEMENT IN THE CONSTRUCTION OF CIRCULAR SAW
BENCHES," to be as follows:-
The object of this Invention is to simplify the construction of circular
saw benches and thereby to reduce the cost of their manufacture. To
this end I provide a novel arrangement of gearing for imparting the
axial motion to the transverse vertical drum used for winding up the
rope or chain that transmits the feed motion to the wood under treat-
ment. Within the drum a ring of toeth is formed into which gears a

page_text: pinion keyed on a short longitudinal shaft. This shaft is supported in
suitable bearings within the framing, and it carries a loose worm wheel
fitted with clutch teeth. Into these clutch teeth takes a sliding clutch
which is carried by the short longitudinal shaft and works over a
feather on that shaft, it being operated to throw it in and out of action
by a forked rock lever connected by a rod with a hand lever at the
feeding end of the machine. A worm on a cross shaft gears into the
worm wheel on the longitudinal shaft, and upon this cross shaft is also
keyed a band pulley with several speeds to receive a band from a pulley
on the saw shaft, which is the driving shaft of the machine. In order
to set the feed in action it is only necessary to engage the clutch with
the teeth on the boss of the worm wincel and a winding up motion will
be imparted to the drum. To unwind the cord or chain from the drum
and return it to its starting position the clutch is disengaged, and the
cord or chain is then free to be drawn back to repeat the feed motion.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Allen Ransome in the Great Seal Patent Office
on the 29th May 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALLEN
RANSOME, of King's Road, Chelsca, in the County of Middlesex, Saw
Mill Engincer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirtieth day of November, in the year
of our Lord One thousand cight hundred and sixty-eight, in the thirty-
second year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Allen Ransome, Her special licence,
that I, the said Allen Ransome, my executors, administrators, and
assigns, or such others as I, the said Allen Ransome, my executors,
administrators, and assigns, should at any time agree 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 "AN IMPROVEMENT IN
THE CONSTRUCTION OF CIRCULAR SAW BENCHES," upon the condition (amongst

page_text: others) that I, the said Allen Ransome, my executors or administrators,
by an instrument in writing under my, or their, or one of their
hands and seals, 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 I, the said Allen Ransome, do hereby
declare the nature of my said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
in and by the following statement, reference being had to the Drawing
hereunto annexed, and to the letters and figures marked thereon (that
is to say):
=
The object of this Invention is to simplify the construction of circular
saw benches, and thereby to reduce the cost of their manufacture. To
this end I provide a novel arrangement of gearing for imparting the
axial motion to the transverse vertical drum used for winding up the
rope or chain that transmits the feed motion to the wood under
operation.
In the accompanying Drawing I have shewn the arrangement of
parts whereby I propose to effect the object of my Invention. Fig. 1 is
a side elevation of a saw bench, shewing one end thereof broken away
in order the better to see the working parts; Fig. 2 is an end elevation
of the same; Fig. 3 is a plan view of the bench, shewing one end
broken away in order to expose to view the working parts beneath.
a is the table on which the timber is laid, b is the circular saw
mounted as usual on a cross shaft which at its outer end carries tho
driving pullies c and the grooved cone pulley d, whereby motion is com-
municated by means of a band to the grooved cone pulley e of the
gearing for feeding forward the timber. This gearing consists mainly
of the transverse vertical drum f, around which passes one end of the
rope or chain f', whereby the timber is drawn forward on the table up
to the saw. Within the drum fa ring of teeth is formed (as shewn in
Fig. 2), into which gears a pinion keyed on a short longitudinal
shaft g'. This shaft is supported in suitable bearings within the fraining
and it carries a loose worm wheel / provided on one side with clutch
teeth i. Into these clutch teeth takes a sliding clutchj which is carried
by the short longitudinal shaft g', and works over a feather on that

page_text: shaft, so that it may be thrown in and out of action by means of a
forked rock lever connected by a rod with a hand lover k at the opposite
and feeding end of the machine. A worm on a cross shaft gears
into the worm wheel on the longitudinal shaft g', and upon this cross
shaft is also keyed the grooved pulley e with several speeds. This pulley
is driven by the band d from the grooved pulley d on the saw shaft,
which as already explained is the driving shaft of the machine. In
order to set the feed motion in action it will only be necessary to engage
the clutch j with the teeth on the boss of the worm wheel h and a
winding-up motion will then be imparted to the drum f by the pinion g
acting on the teeth inside the drum. To unwind the cord or chain from
the drum and return it to its starting position the clutch is disengaged,
and the cord or chain is then free to be drawn back by hand so as to
be ready to repeat the feed motion.
Having now described my Invention of "An Improvement in the
Construction of Circular Saw Benches," and having explained the manner
of carrying the same into effect, I claim as the Invention secured to mo
by Letters Patent as aforesaid, the mode herein set forth of constructing,
arranging, and actuating what is usually termed the feed motion of
saw benches, that is, those parts whereby the timber to be operated upon
is drawn forward to the rotating saw.
In witness whereof, I, the said Allen Ransome, have hereunto set
my hand and scal, the Twenty-eighth day of May, in the year of
our Lord One thousand eight hundred and sixty-nine.