IMPROVEMENTS IN MACHINERY FOR PREPARING COTTON & OTHER FIBROUS SUBSTANCES
Year: 1877

page_text: LETTERS PATENT to Benjamin Alfred Dobson, of the Firm of Messrs. Dobson
& Barlow, of Bolton, in the County of Lancaster, Machine Maker, for the In-
vention of "IMPROVEMENTS IN MACHINERY FOR PREPARING COTTON & OTHER
FIBROUS SUBSTANCES."
Sealed the 7th December 1877, and dated the 26th June 1877.
PROVISIONAL SPECIFICATION left by the said Benjamin Alfred Dobson at
the Office of the Commissioners of Patents on the 26th June 1877.
BENJAMIN ALFRED DOBSON, of the Firm of Messieurs Dobson & Barlow, of
Bolton, in the County of Lancaster, Machine Maker. "IMPROVEMENTS IN MACHINERY
FOR PREPARING COTTON & OTHER FIBROUS SUBSTANCES."
The first part of my Invention consists in an improved combination of machinery
for stopping drawing frames when a flat waste or an undue bulk of fibres, or other
obstacle adhering to the sliver, attempts to pass through the funnel between the
drawing rollers and the callender rollers.
The funnel is supported as usual on a tumbler lever, the lower end of which
acts on a trigger which is placed above the ordinary feeler bar, moving to and fro
as usual; to this bar is fixed a stud.
.
When the funnel is depressed by the obstacle adhering to the sliver the tumbler
lever acts on the trigger, and depresses it, so that the stud on the feeler bar is
arrested by it. This stoppage of the feeler bar moves the driving strap from the
fast to the loose pulley by the ordinary mechanism, thereby stopping the frame.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Benjamin Alfred Dobson in the Great Seal Patent Office on the 12th
December 1877.
BENJAMIN ALFRED DOBSON, of the Firm of Messrs. Dobson & Barlow, of Bolton,
in the County of Lancaster, Machine Maker. ** IMPROVEMENTS IN MACHINERY
FOR PREPARING COTTON AND OTHER FIBROUS SUBSTANCES."
My Invention consists in an improved combination of machinery for stopping
drawing frames when a flat, waste, or an undue bulk of fibres, or other obstacle
adhering to the sliver, attempts to pass through the funnel between the drawing
rollers and the calender rollers.
And in order that my Invention may be fully understood, and readily carried
into operation, I will proceed to describe the accompanying Drawing, which repre-
sents part of an ordinary drawing frame to which my improvements are applied.
a is the part of the roller beam; b, the front drawing roller; c, the guide plate;
d, d, the calender rollers; e, the funnel or trumpet mouth fixed to the tumbler
lever; and g is the feeler bar, which moves to and fro under the end of the
tumbler lever f, These parts are all made as usual.
My improved machinery consists of the trigger, which is hinged to a bracket
fixed to the roller beam, and which is held against the frame by the weighted
lever ' fixed to the axle of the trigger, and--is prevented from going too far by the
stops or lugs h². To the feeler bar g is fixed the stud g¹. So long as the sliver
continues to pass freely through the funnel e the parts remain in the positions
shewn in the Drawing, and the stud g¹ moves to and fro under the point of the
trigger h; but when the funnel is depressed by the obstacle adhering to the sliver
the tumbler lever facts on the trigger h, and depresses its point, so that the stud gl
on the feeler bar g comes in contact with and is arrested by it. This stoppage of
the feeler bar moves, the driving strap from the fast to the loose pulley by the
ordinary mechanism, thereby stopping the frame.
Having thus stated the nature of my Invention, and described the manner of
performing the same, I declare that I claim, the trigger and the stud g¹ on the
feeler bar g, acting in the manner and for the purpose described.
:
In witness whereof, I, the said Benjamin Alfred Dobson, have hereunto set my
hand and seal, this, Tenth day of December, One thousand eight hundred
and seventy-seven.
BENJAMIN ALFRED DOBSON. (L.S.)