Improvements in Crown Saws for the Manufacture of Curtain Poles and the like.
Year: 1890

page_text: Date of Application, 23rd July, 1890
Complete Specification Left, 21st Apr., 1891-Accepted, 18th July, 1891
PROVISIONAL SPECIFICATION.
Improvements in Crown Saws for the Manufacture of Curtain Poles
and the like.
We, WILLIAM PITT, Foreman, HENRY JOHN CARTER and JAMES AYNSLEY,
General Wood Turners, all of 9 & 10 Gun Street, in the City of London, do hereby
declare the nature of this invention to be as follows:-
According to this invention we manufacture curtain poles and the like by
means of a crown saw provided with outside cutters to remove the wood on the
outside of the cut.
The tubular stem of the saw is of somewhat smaller diameter than the points
of the teeth, so that it forms a guide for the work, causing it to remain
cylindrical in spite of knots or other obstructions tending to make the saw
work unevenly. The cylindrical stem of the saw is rotated in any convenient
manner.
2000
W. PITT.
HENRY J. CARTER.
JAMES AYNSLEY.
Improvements in Crown Saws for the Manufacture of Curtain Poles
and the like.
We, WILLIAM PITT, Foreman, HENRY JOHN CARTER and JAMES AYNSLEY,
General Wood Turners, all of 9 & 10 Gun Street, in the City of London, 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:-
According to this invention we manufacture curtain poles and the like by
means of a crown saw provided with outside cutters to remove the wood on the
outside of the cut.
The tubular stem of the saw is of somewhat smaller diameter than the points of
the teeth, so that it forms a guide for the work, causing it to remain cylindrical in
spite of knots or other obstructions tending to make the saw work unevenly. The
crown cutter is mounted upon a hollow spindle carried in suitable bearings; it has
belt pulleys upon it and is rapidly rotated by an endless belt passing around a
drum of large diameter upon a driving shaft. From the spindle a counter shaft is
driven and this by a worm and gear wheels, gives motion to an endless chain. This
chain draws a carriage forward towards the cutter along a table or bed. The wood
to be cut is supported near the cutter by clip or bracket and at its other end a cone
or centre point upon the carriage bears against it. The clip is set sufficiently
slack to admit of the wood being thrust forward through it. This is effected by
the advance of the cone or centre point which continues to approach the cutter
travelling along the centre line until the wood forming the pole has been thrust
completely through.
In order that our said invention may be fully understood and readily carried into
effect we will proceed to describe the drawings hereunto annexed.

page_text: DESCRIPTION OF THE DRAWINGS.
Figure is a side elevation of sawing apparatus in accordance with our
invention.
Figure 2 is a front elevation partly in section of the same.
Figure 3 is a plan of a portion of the gearing.
Figure 4 is a front elevation of the crown cutters.
Figure 5 is a side elevation, and
Figure 6 is a perspective view of the same.
Figure 7 is a side elevation, and
Figure 8 is a front elevation of the central tubular cutter.
Figure 9 is a front elevation of the clip for supporting the wood in front of
the cutter.
a a is the frame and b is a tubular axis carried in bearings upon it. ₁₁are belt
pulleys. is the main driving belt. d is a counter shaft driven from 6 by a belt e.
A worm on the shaft d drives the train of wheels f³, ƒ³, f³, f, the last of which
is a chain pinion partly encircled by the long endless chain g. The chain g passes
over guide pulleys as shewn; it serves to give motion to the carriage carrying the
cone or centre point h. The carriage can be clutched to the chain or liberated at
pleasure by a clamp operated by the handle '. is the bracket or clip to support the
wood near the cutter; in Figure 9 the wood is represented in section by dotted lines in
the position it occupies when all is ready for it to be presented to the crown cutter.
k represents the crown which is screwed into the end of the tubular axis b. is the
cutting cylinder, it is formed with teeth at its end. 1× is a stud on the outside of
which enters a corresponding groove in the crown and compels the crown to carry
the cutter round with it as it rotates. The teeth are so formed that their ends
or points remove the superfluous material and their sides smooth the work as it enters
within the circle of teeth. The cutter cylinder 1 fits the work closely until it has passed
beyond the roots of the teeth but not so tightly as to cause undue friction. mm are
the cutters which remove the superfluous material exterior to the cutter 1 they are
set obliquely in the manner shewn upon two inclined horns k¹ k¹ upon the crown.
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 crown cutter consisting of the combination of parts k k¹and m
substantially as described.
2. Crown sawing apparatus substantially as described for the manufacture of
curtain poles and the like.
Dated this 18th day of Annil 1901
WILLIAM PITT.
HENRY JOHN CARTER.
JAMES AYNSLEY.