Improvements in and connected with Band Sawing Machines.
Year: 1894

page_text: Date of Application, 10th Apr., 1°91
Complete Specification Left, 24th Dec., 1894-Accepted, 26th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in and connected with Band Sawing Machines.
WILLIAM BRIGHTON Yacht and Boat Builder No. 218 Southtown Great
Yarmouth Norfolk do hereby declare the nature of this invention to be as
follows:-
The log band saw adjuster. By this adjuster the saw can be turned either right
or left when the saw is running it cnsist of two swivell blocks wich the saw passes
threw one close to the top of the log and the other close undeneeth the log thees
blocks are worked by four worms two worn wheels and two worm quadrants on one
quarter of each swivell block wich are worked by a hand wheel and can be worked
to four hundredth part of a inch it can also be fitted to any other band saw at
present in use.
T
AT: 1. of Anvil 1841
WILLIAM BRIGHTON,
Yacht and Boat Builder, No. 218, Southtown, Great Yarmouth.
Improvements in and connected with Band Sawing Machines.
1, WILLIAM BRIGHTON of 218 Southtown, Great Yarmouth, in the County of
Suffolk, Yacht and Boat Builder, 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 :-
My invention relates to improvements in and connected with band sawing
machines. The object of my invention is to construct means whereby a band saw
can be so controlled in that part of its path in which the operation of sawing is
performed that twist or 'spring' in the band or other irregularity which ordinarily
would tend to divert the cut from its proper plane can be neutralized.
According to my invention I construct apparatus comprising one or more guides
adapted to clasp the band saw and to be adjusted in company therewith and also by
preference relatively thereto; the former adjustment can be effected without
necessitating stoppage of the saw and is afforded for the purpose of enabling the
guide or guides to neutralize any twist or winding of the band saw and the latter
is provided to enable the guide or guides to be put in the best position for
opposing under various circumstances the thrust against the saw set up by the
the work.
Where two or more guides are employed I preferably connect them by
mechanism which will turn each of them simultaneously and to an equal extent in
their adjustment in company with the saw.
In order that the nature of my invention may be clearly understood I will
now proceed to describe the same with reference by way of example to the
accompanying drawings wherein
Fig. 1 is an elevation of a band-saw constructed according to my invention.

page_text: Fig. 2 is a horizontal section on the line 22 of Fig. 1 and
Fig. 3 a sectional elevation of a detail of Fig. 1 hereinafter particularly
referred to.
A is the frame of the machine. A¹ is the saw table. B are the saw-pulleys,
and C is the band-saw which they drive as is customary. D is a standard
supported on the frame A by brackets A and E and F are socket-pieces retained in
position thereon by the screws El and F¹. They support respectively the arms (+
and H which extend over and under the table A¹ as shown and have at their free
ends bearings G₁ H¹ which are divided down one side as at G and H' to enable
the band saw to enter them and are bored to receive guides G H adapted to turn
therein. The guides, like the bearings are divided down one side for a like
purpose and to leave a clearance about the saw teeth; they have flanges G* H*
which prevent them from going too far down into the bearings G' H', and have
each a central rectangular channel through which the band saw C travels and in
which packing-pieces I are retained on each side of the saw clear of the teeth
thereof. I are screws in the flanges of the guides by means whereof the packing-
pieces are adjusted to bear upon the band with the desired degree of pressure.
There may be two or more of these screws in each flange, projections 12 on the
pieces I limit their descent in the guides.
One side of each flange G H is curved and toothed as shown to constitute a
worm-wheel segment concentric with the bore of the bearings G¹ H¹.
J is a vertical spindle turning in projections E' F' on the socket-pieces E F;
Jare collars secured to it by set-screws to prevent it from moving vertically, and
Kare worms similarly secured thereto.
L' are
Lare spindles journalled in the socket-pieces E F and bearings G'H' so as to
partake of any movement of the arms G H relatively to the standard D.
worm wheels and L2 worms on the spindles L; the former gear with the worms K
and the latter with the toothed portions of the flanges G H of the guides.
When the band saw C is in the guides G H and the packing pieces I bear
against it the saw can be turned about the axis of the bearings G' H' by the
rotation of the guides G' H3 which is effected by the spindles J and L and the
worm gears K L' L' operated thereby to rotate both guides simultaneously and
similarly by the toothed flanges thereof. This operation can be effected with great
delicacy by reason of the employment of worm adjusting gear which further is as
easily operated when the saw is at work as when it is idle.
By slackening the set screw E' F' of the socket pieces and certain of the
attachments to the spindle J and arms G H are freed for adjustment on and about
the standard D and the worms K' are enabled to be readjusted as may be necessary
to maintain them always in gear with the worm wheels L'.
In particular it is advantageous to be able to adjust the arm G vertically in
order to keep it as near as possible to the table as the dimensions of the work will
permit.
I wish it to be understood that 1 do not limit my invention to the particular
example herein given, for like results can be obtained by other constructions and
arrangements of parts without departure from my invention.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is ;-
1. In a band-sawing machine guiding the band saw by a guide through which it
passes and which is adjustable about an axis coincident or approximately
coincident with that part of the path of the saw in which the operation of
sawing is performed.
2. In a band-sawing machine guiding the band by two or more guides through
which it passes and which are adjustable similarly and simultaneously about an
axis coincident or approximately coincident with that part of the path of the saw
in which the operation of cutting is performed.

page_text: 3. In a band sawing machine the combination with one or more guides adjustable
in the manner indicated in Claims 1 and 2 of means for adjusting the guide or
guides in the direction of the path of that part of the saw which is guided
therein substantially as and for the purpose described.
4. In a band sawing machine guides such as G H³ rotatable in supports such
as G¹ H¹ and geared together by any suitable gearing which will rotate them
similarly and simultaneously in their supports substantially as and for the purpose
described.
5. In a band-sawing machine the combination with the main framing of arms
such as G H one or both adjustable vertically and angularly thereon rotatable
guides such as G' H³ adapted to turn in the ends of the arms and gearing connecting
the guides substantially as and for the purposes described.
6. A rotatable guide G³ or H³ with packing pieces such as I and set screws for
adjusting the packing-pieces substantially as and for the purpose described and
illustrated in the accompanying drawings.
7. The construction and arrangement of parts constituting the complete band-
sawing machine substantially as described and illustrated in the accompanying
drawings.
Dated this 24th day of December 1894.
WILLIAM BRIGHTON.
Boult & Wade,
Agents for the Applicant.