Improvements in Sawing Machines.
Year: 1891

page_text: Date of Application, 24th Jan., 1891
Complete Specification Left, 24th Oct., 1891-Accepted, 28th Nov., 1891
PROVISIONAL SPECIFICATION.
Improvements in Sawing Machines.
We THOMAS LEES and RALPH LEES Engineers, Park Foundry, Hollinwood
near Oldham do hereby declare the nature of this invention to be as follows:-..
Our said invention relates to an improved attachment to band saws for sawing
wood.
•
2
According to our said invention we provide a machine known as a band saw with
an accessory in the shape of a circular saw mounted in the case of a band saw
driven by hand power on the driving shaft of the machine. The said circular saw
is provided with an adjustable rising and falling table.
In case of a band saw driven by power or by hand or power, at will where
different speeds are required for the band and circular saws we provide means for
driving each of the saws independently of the other consisting of a countershaft
provided with a loose pulley and two driving pullies with the loose pulley lying
between them.
One of the driving pullies is mounted. on and revolves with the counter shaft
and secured to the same shaft is a pulley or wheel round or over which the
band saw is stretched and from which it derives motion by friction. The other
driving pulley is mounted on a hollow bush running loose on the said counter-
shaft and carrying a pulley from which motion is transmitted to a corresponding
pulley on the spindle or driving shaft of the circular saw: In such case we
provide means for detaching the part of the shaft which carries the saw from
the part of the shaft which carries the driving wheel and handle so that they
may run independently of each other at their proper relative speeds.
Dated this Twenty-second day of January 1891.
EDWARD TURNER WHITELOW,
70, Deansgate, Manchester, Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Sawing Machines.
We, THOMAS LEES and RALPH LEES, Engineers, Park Foundry, Hollinwood
near Oldham 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 :-
'
Our said invention relates to an improved construction and arrangement of
sawing machines for wood by which we combine in a single machine a circular
saw and an endless band saw with means for driving by hand or power at will;
and for varying the speed to suit which ever saw it is desired to use.
1
Referring to the accompanying sheet of drawings in which is shown a machine
constructed in accordance with our said invention
•
Fig. 1 is a side elevation,
Fig. 2 is an end view, and
Fig. 3 is a plan partly in section.
In all the figures the same letters refer to the same parts.
a is the endless band saw stretched over the pullies a¹ and a² and deriving
its motion from the rotation of the bottom pulley a¹. A table as provided with the
tilting motion usual in band saws is provided. The ordinary. means for guiding the
saw and for keeping it at a suitable degree of tension are provided as will be well
understood without further description.

page_text: bis the circular saw provided with a vertically adjustable table and a fence c.
d is the main driving shaft of the machine to which is secured the pulley a'. On
the shaft d are three driving pullies a³e and 12 on one or other of which the main
belt which drives the machine is caused to act. The main belt may be transferred
from one pulley to another by any well known belt shifting device. The driving
pulley is keyed to the shaft d'so that when the driving belt is on the pulley a
the the shaft d will be driven and the band saw will be put into operation. The
pulley bruns loose on the shaft d and on a cannon, or bush, forming a prolongation
of the boss of the pulley is keyed a pulley 63 connected by means of a crossed
belt with the driving pulley 5 on the spindle of the circular saw b.
When the main driving belt acts on the pulley & the latter will run freely on the
shaft d but will take with it the pulley 6 and thus drive the circular saw b.
By the means above described either the band saw or the circular saw may be
driven by power independently of each other at different appropriate speeds. When
neither saw is required to be driven the main driving belt runs on the central
loose pulley e.
In order to drive either the band saw or the circular saw by hand we provide a
handle or crank on a shaft f' carrying a chain wheel connected by a chain ³
to a chain wheel running loose on the shaft d. The boss of the chain wheel
projects at one side into and can run freely in the hollow boss of the pulley b³. It
is however not in permanent connection with the boss of the pulley nor with the
cannon or prolongation of the boss of the pulley 72. A set or pinching screw is
provided in the boss of the pulley * and when is required to drive the circular
saw the set screw 6 is screwed tight against the projection on that side of the boss
of the chain wheel whereby the rotation of the chain wheel is imparted to
the pulley and the circular saw is driven as in the case of belt driving as herein-
before described.
A second projection of the boss of the chain wheel fenters into and runs freely
in a bush or coupling a secured by a through pin as or other suitable means to the
shaft d. When it is necessary to drive the band saw a set screw a in the coupling a
is screwed tight against the projection of the boss of the chain wheel whereby
the coupling at the shaft d and the pulley a' all rotate together and thus the motion
of the crank fis imparted to the endless band saw.
By tightening either of the set screws (while one remains loose) the driving may
be disconnected from either saw and connected to the other at will.
It is of course to be understood that when operating the saws by hand the main
driving belt is either disconnected or is on the loose pulley e.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is-
1. The combination of a circular and an endless band sawing machine with the
means for the separate driving of either saw by hand or power substantially as
hereinbefore described and shown.
2. In a combined circular and endless band sawing-machine the use combination
and arrangement of fast and loose pulleys, bushes, chain wheels, and connecting
and disconnecting devices substantially as and for the purpose hereinbefore
described and shown in the accompanying drawing.
Dated this Twenty-third day of October 1891.
EDWARD TURNER WHITELOW,
70, Deansgate, Manchester, Agent for the Applicants.