IMPROVEMENTS IN THE FEED MOTION OF CIRCULAR SAWING MACHINES
Year: 1883

page_text: LETTERS PATENT to Thomas Nield Robinson of the firm of Thomas Robinson
and Son Limited of Rochdale in the County of Lancaster Engineer for an
Invention of "IMPROVEMENTS IN THE FEED MOTION OF CIRCULAR SAWING
MACHINES"
"
PROVISIONAL SPECIFICATION left by the said Thomas Nield Robinson at
the Office of the Commissioners of Patents on the 6th March 1883.
THOMAS NIELD ROBINSON of the firm of Thomas Robinson and Son Limited of
Rochdale in the County of Lancaster Engineer. "IMPROVEMENTS IN THE FEED
MOTION OF CIRCULAR SAWING MACHINES
47 : C
The object of my Invention is to construct a simple feed motion which may be
easily removed from the surface of the saw bench when not in use.
J
In performing my Invention I employ an independent shaft working in bearings
on the front of the saw bench: a worm wheel is keyed or secured to the end of
this shaft which receives motion from a worm on a second, shaft: cone pulleys are
secured to the second shaft by which different speeds may be given to the feed. In
place of a worm and worm wheel other gearing may be used.
",
The bracket or casting which carries the feed motion has two projections on the
lower side by which it is hinged to the first named shaft: a bevel wheel is keyed
or secured to a bush which bush slides on a feather key in the shaft and gears into
a bevel wheel keyed or secured to the lower end of a vertical shaft: this vertical
sbaft revolves in a long bearing in the bracket carrying the feed motion. The
bracket and feed motion can be traversed by. hand along the independent shaft.
"
To the upper end of this vertical shaft is secured a radial arm which carries the
feed rollers at one end: the weight for holding the feed rollers to their work may
be attached to any convenient part of this arm.
: By this improvement I am enabled to swing the entire feed motion entirely
below the level of the top of the saw bench.
When the bracket is in position for work it is fixed by a vise pin or in other
convenient manner.
C
0

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thomas Nield Robinson in the Great Seal Patent Office on the
5th September 1883.
THOMAS NIELD ROBINSON of the firm of Thomas Robinson and Son, Limited,
of Rochdale in the County of Lancaster, Engineer. "IMPROVEMENTS IN THE FEED
MOTION OF CIRCULAR SAWING MACHINES'
"
The object of my Invention is to construct a simple feed motion which may be
easily removed from the surface of the saw bench when not in use.
In performing my Invention I employ an independent shaft working in
bearings on the front of the saw bench: a worm wheel is keyed or secured to the
end of this shaft which receives motion from a worm on a second shaft: cone
pulleys are secured to the second shaft by which different speeds may be given
to the feed. In place of worm and worm wheel other gearing may be used.
The bracket or casting which carries the feed motion has two projections on the
lower side by which it is hinged to the first named shaft: a bevel wheel is keyed
or secured to a bush, which bush slides on a feather key in the shaft and gears
into a bevel wheel keyed or secured to the lower end, of a vertical shaft: this
vertical shaft revolves in a long bearing in the bracket carrying the feed motion.
The bracket and feed motion can be traversed by hand, along the independent
shaft. To the upper end of this vertical shaft is secured a radial arm which carries
the feed rollers at one end: the weight for holding the feed rollers to their work
may be attached to any convenient part of this arm.
By this Improvement I am enabled to swing the entire feed motion entirely
below the level of the top of the saw bench.
When the bracket is in position for work it is fixed by a vise pin or in other
convenient manner.
And in order that my Invention may be fully understood and readily carried into
effect I will proceed to describe the accompanying Sheet of Drawings reference
being had to the figures and letters marked thereon.
Fig. 1 is an elevation and Fig. 2 a plan of a circular sawing machine fitted with
my improved feed motion.
a is the saw bench fitted with an independent shaft b working in bearings a' on
the front of the bench: to the end of this shaft is keyed or secured a worm wheel b¹
driven by a worm 6* on a second.shaft c to which cone pulleys c' are secured so as
to give different speeds to the feed. Motion is given to the shaft c in any
convenient manner and in place of the worm 6' and worm wheel 6' any other
gearing may be employed. The bracket or casting d. which carries the feed
motion has two projections or bosses d on the lower side through which the
shaft b passes: and thus forms a hinge for the bracket d and the feed motion. A
bevel wheel e is keyed or secured to a bush e¹ which slides on a feather key in the
shaft b. The bevel wheel e gears into a bevel wheel f keyed or secured to the
lower end of a vertical shaft f' which revolves in a long bearing in the bracket d.
To the upper end of this vertical shaft f¹ is secured a radial arm f' which carries
the feed rollers g on the stud g₁ at one end: The feed rollers g are driven by a
spur wheel g² secured to the shaft f' which drives the two carrier wheels g³ g
that gear into and drive the wheel secured to the stud g'. The weight for
holding the feed rollers g to their work is not shown in the drawing but it may be
attached to any convenient part of the arm f³.
The bracket d and feed motion can be traversed by hand along the independent
shaft b and secured in any desired position by the vise pins h. The fence 2, see
Fig. 2, is of the usual construction; it is shown hinged to the shaft ; in bearings j¹
on the frame a

page_text: The fence may be adjusted in sawing different thicknesses by turning the
shaft, to which it is connected, by a screw and nut.
I am enabled by these Improvements to swing the entire feed motion carried by
the bracket d and hinged by the projections d¹ to the shaft b entirely below the
level of the top of the saw bench a and to adjust and secure the bracket d and
with it the feed rollers g to any desired angle with the fence i when feeding beveled
or other irregular shaped timber. I can also adjust and secure the feed rollers in
any desired position.
By this means a saw bench fitted with the improved self-acting and adjustable
feed motion for ripping can readily be converted into a cross cut sawing machine
or bench free from any projections above the top of the table.
Having stated the nature of my Invention and described a convenient manner
of performing the same.
I declare that I claim
1. The improvements in the feed motion of circular sawing machines, substan-
tially as herein shown and described.
2. The improved mode of adjusting and setting the feed rollers of sawing
machines to agree with the fence or with the timber being sawed as herein
described.
'
In witness whereof I the said Thomas Nield Robinson have hereunto set my
hand and seal this third day of September One thousand eight hundred and
eighty three.
THOMAS NIELD RODINDON (L.S.)