IMPROVEMENTS IN CRANK SHAFTS OF LOOMS FOR WEAVING, AND IN MACHINERY FOR TURNING THE CRANK TOURNA on XT. a
Year: 1875

page_text: LETTERS PATENT to William Haggas, of Burnley, in the County of
Lancaster, Mechanic, for the Invention of " IMPROVEMENTS IN CRANK
SHAFTS OF LOOMS FOR WEAVING, AND IN MACHINERY FOR TURNING THE CRANK
TOURNA on XT.
a

page_text: Secondly. In the application of a counter balancing apparatus applied
to the crank shaft of looms.
For holding the crank shafts in position whilst its journal is being
turned I employ a short shaft secured to the face plate of the turning
lathe, on the other end of which shaft there is a chuck plate, the shaft
being supported by bearings. A like chuck plate and short shaft,
supported by movable pedestals, or by the "centre" of the loose head
of the lathe, carries the other end of the crank shaft. The chuck plate
is provided with movable V pieces, which by set screws secure the ends
of the crank firmly in position for turning, its journals being central or
true with the centre of its holding plates.
To counterbalance the crank shaft, in lieu of the weight applied to the
fly wheel of the loom, I employ an adjustable arm (similar in form and
weight to the crank) to cach end of the crank shaft, and secured at the
opposite side of the shaft by adjusting screws, that such arms may be
brought nearer to or removed further from the central line of the shaft.
The loom having a crank shaft or balanced stops at the "back centre," and
is easier to stop or start than where a weight is applied to the fly wheel.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Haggas in the Great Scal Patent Office on 2
the 24th July 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
HAGGAS, of Burnley, in the County of Lancaster, Mechanic, send
greeting.
:
..
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fifth day of January, in the
year of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said William Haggas, Her special
licence, that I, the said William Haggas, my exécutors, administrators,.
and assigns, or such others as I, the said William Haggas, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term

page_text: The loom having a crank shaft so balanced stops at the "back centre,"
and is easier to start than where a weight is applied to the fly wheel.
1
Such being the nature and object of the Invention I will now proceed
to describe the same in detail, and in order that the same may be fully
understood I have hereunto annexed a Sheet of Drawings, and have
marked the same with figs, and letters of reference.

page_text: Having thus fully described the nature and particulars of this my
Invention, together with the manner in which the same is to be or may
be performed, I would have it understood that I do not claim any of the
separate parts herein referred to when considered apart from the peculiar
application and arrangement, but what I do claim is,-
The use of the screw nipping and holding apparatus combined and
applied to and in connection and combination with the plates C in the
manner and for the purpose described and illustrated.
Secondly. The use of the chuck plate C and its nipping appliances
applied to the loose head of the lathe when such plate and its shaft are
caused to rotate by means of the crank or when driven by gear.
Thirdly. The application and use of the countrebalance weight to the
crank shafts of looms, as described and illustrated.
In witness whereof, I, the said William Haggas, have hereunto sot
my hand and seal, this Twenty-second day of July, in the year
of
our Lord One thousand eight hundred and seventy-five..
Witness,
WALTER BRIERLEY,
Patent Agent,
Halifax & Blackburn.
WILLIAM HAGGAS. (L.S.) ·