Improvements relating to the Feed Mechanism of Circular Saw Benches.
Year: 1896

page_text: Date of Application, 5th Nov., 1896
Complete Specification Left, 5th Aug., 1897-Accepted, 11th Sept., 1897
PROVISIONAL SPECIFICATION.
Improvements relating to the Feed Mechanism of Circular Saw
Benches.
I, NORMAN TAILBY, of 76 Summer Row, in the City of Birmingham, Timber
Merchant, do hereby declare the nature of this invention to be as follows:-
This Invention consists of improvements relating to the feed mechanism for
circular saw benches, my object being to provide at small cost an efficient, con-
venient, and durable feed motion adapted for attachment to existing saw benches
and so arranged that it can be readily swung in or out of position.
In carrying my invention into effect I mount a radial arm preferably of cast
iron of a girder section upon the upper end of a column which is mounted upon
the saw bench. The lower end or base of the column is of a box like form and
has a flange at its extremity by which it is bolted to the saw bench table. The
lower end of the box is closed and made liquid tight by means of a solid cover
plate with interposed sheeting or packing material.
Through the centre of the column I insert a shaft having its upper end pro-
jecting beyond the top of the column and its lower end entering within the box
like base. Upon the lower end of the vertical shaft I fix a worm wheel which
is driven by a worm formed with or secured upon a shaft driven by belting from
the saw spindle. Both worm and worm wheel are entirely enclosed by the base
of the column and I charge sufficient oil into the same to provide an oil bath
for the thorough lubrication of the gearing.
On the upper end of the vertical shaft I fix a chain wheel driving a chain,
preferably of the Ewart type, which gears into a wheel fixed to the upper end
of the feed roller spindle which is carried within a socket supported by adjustable
rods carried within projecting brackets or bearings on the radial arm.
fence is provided with suitable guide rollers, and the feeding roller on the lower
end of the spindle is drawn tightly against the timber to be fed on to the saw
by means of a weighted chain or rope attached to the spindle socket.
The
The spindle is adjusted to the required distance from the centre of the column
by sliding the supporting rods within their brackets. When adjusted to the
required position the rods are secured in position by means of sett screws upon
the supporting brackets or bearing.
The rate of feed is adjusted to suit the work required by employing wheels
having the necessary difference in their diameters upon the vertical shaft and
the feed roller spindle respectively, the chain being adjusted in length to suit
any particular pair of wheels by removing or adding the required number of links.
When the feed motion is not required the radial arm is swung back out of
position, thus carrying the feed roller clear of the fence.
Dated this 4th day of November 1896
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant,

page_text: COMPLETE SPECIFICATION.
Improvements relating to the Feed Mechanism of Circular Saw
Benches.
I, NORMAN TAILBY, of 76 Summer Row, in the City of Birmingham, Timber
Merchant, 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:--
This Invention consists of improvements relating to the feed mechanism for
circular saw benches, my object being to provide at small cost an efficient, con-
venient, and durable feed motion adapted for attachment to existing saw benches
and so arranged that it can be readily swung in or out of position.
In the accompanying sheet of explanatory drawings to be hereinafter referred
to :-
Figure 1 is a side elevation and Figure 2 a plan of a saw bench fitted with my
improved feed mechanism.
Figures 3 and 4 are detail views, to a larger scale showing the adjustable con-
nection between the radial arm and its supporting column, whilst Figure 5 is
an enlarged section of the oil box formed at the base of the column.
The same reference letters in the different views indicate the same parts.
In carrying my invention into effect I mount a radial arm as A preferably of
cast iron of a girder section upon the upper end of the column B3 which is
mounted upon the saw bench. The lower end or base C of the column is of a
box like form and has a flange C at its extremity by which it is bolted to the
saw bench table. The lower end of the box is closed and made liquid tight by
means of a solid cover plate D with interposed sheeting or packing material.
Through the centre of the column I insert a shaft E having its upper end pro-
jecting beyond the top of the column and its lower end entering within the box
like base. Upon the lower end of the vertical shaft I fix a worm wheel F which
is driven by a worm G formed with or secured upon a shaft H driven by belting
from the saw spindle. Both worm and worm wheel are entirely enclosed by
the base of the column and I charge sufficient oil into the same to provide an
oil bath for the thorough lubrication of the gearing.
On the upper end of the vertical shaft E I fix a chain wheel driving a chain J,
preferably of the Ewart type, which gears into a wheel K fixed to the upper end
of the feed roller spindle L which is carried within a socket M supported by
adjustable rods N carried within projecting brackets or bearings 0 on the radial
arm. The fence P is provided with suitable guide rollers, and the feeding roller
on the lower end of the spindle is drawn tightly against the timber to be fed on
to the saw, by means of a weighted chain or rope Q attached to the spindle
socket M.
The spindle is adjusted to the required distance from the centre of the column
by sliding the supporting rods N within their brackets 0. When adjusted to
the required position the rods are secured by means of set screws upon the
supporting brackets or bearings.
The rate of feed is adjusted to suit the work required by employing chain
wheels having the necessary difference in their diameters upon the vertical shaft E
and the feed roller spindle L respectively, the chain being adjusted in length
to suit any particular pair of wheels by removing or adding the required number
of links.
When the feed motion is not required the radial arm is swung back out of
position, thus carrying the feed roller clear of the fence,

page_text: The feed roller spindle L can be set at a bevel or at an angle other than a right
angle with the saw bench, by slackening the screws R or the stud nuts at the
inner end of the radial arm A, thus permitting such arm to be turned within
the limits of the stud slots and set at the necessary position for the required
bevel.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is:
1. The improved feed mechanism for saw benches substanually as described
and as illustrated.
2. The combination with a saw bénch of a radial arm A adjustably connected
with a column B having its lower end formed as an oil box and for containing
the worm wheel F and worm G driven from the saw spindle, the feed roller
spindle L of the saw bench being carried in a socket M supported by rods N
adjustable within brackets or bearings formed upon or with the said radial arm A,
substantially as and for the purposes described and as illustrated.
Dated this 4th day of August 1897.
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.