Improvements in Ploking Motions of Looms for Weaving.
Year: 1891

page_text: Date of Application, 7th Sept., 1891
Complete Specification Left, 24th May, 1892-Accepted, 2nd July, 1892
PROVISIONAL SPECIFICATION.
Improvements in Ploking Motions of Looms for Weaving.
We, THOMAS TAYLOR, of the firm of Barlow and Jones, Limited, of Bolton in
the County of Lancaster, Manufacturers, WILLIAM MYERS, Card Cutter, of
334 Bridgman Street and MOSES WHITTLE, Overlooker, of 43 Lena Street, both
of Bolton aforesaid, do hereby declare the nature of this invention to be as
follows:-
Our invention is applicable to looms fitted with either over or under pick.
motions, and the object of our invention is to give a sharper or greater impact to
the picking arm and at the same time an easier pick than is possible with. the
ordinary gearing.
The picking shaft of loom is commonly driven by a wheel on the crank. shaft
which gears into a wheel of double its diameter keyed on the picking shaft so as to
reduce the speed by one half; according to our invention we propose to employ a
pair of specially constructed wheels with double the number of teeth-in the driven
as there are in the driving wheel which is secured to the crank shaft.
In one construction we make the small gear circular and bore it out of the centre
and fit it eccentrically on the crank shaft, while the larger wheel on the picking
shaft with which it gears is elliptical. The striker on the picking shaft is secured
in such a position, i.e. parallel to the longest diameter of the elliptical wheel, that it
comes into contact with and strikes the ueb or other mechanism for moving the
picking arm when the elliptical wheel is travelling at its highest speed.
Dated this Fifth day of September 1891.
H. B. BARLOW,
Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in Ploking Motions of Looms for Weaving.
We, THOMAS TAYLOR, of the firm of Barlow and. Jones Limited, of Bolton, in
the County of Lancaster, Manufacturers WILLIAM MYERS, Card Cutter, of
334 Bridgman Street, and MOSES WHITTLE, Overlooker, of 43 Lena Street, both
of Bolton aforesaid, 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:-
-
Our invention is applicable to looms fitted with either over or under pick
motions, and the object of our invention is to give a greater or sharper impact to
the picking arm and at the same time an easier pick than is possible with the
ordinary gearing.
The picking shaft of a loom is commonly driven by a wheel on the crank shaft
which gears into a wheel of double its diameter keyed on the picking shaft so as to
reduce the speed by one half; according to our invention we propose to employ a
pair of specially constructed wheels with double the number of teeth in the driven
as there are in the driving wheel which is secured to the crank shaft.
We make the small gear circular and bore it out of the centre and fit it
eccentrically on the crank shaft, while the larger wheel on the picking shaft with
which it gears is elliptical. The striker on the picking shaft is secured in such a
position, e. parallel to the longest diameter of the elliptical wheel, that it comes
into contact with and strikes the neb or other mechanism for moving the picking
arm when the elliptical wheel is travelling at its highest speed,

page_text: And in order that our invention may be fully understood and readily carried into
effect we will describe the accompanying sheet of drawings reference being had to
the figures and letters marked thereon.
Figure 1 is an end elevation partly a section and Fig. 2 a plan of so much of the
picking motion of an under pick loom as is necessary for illustrating the application
of our improvements and
Fig. 3 is a vertical section of the elliptical wheel showing the preferred mode of
mounting the same upon the picking shaft.
In these views, a designates the crank shaft on which is fixed eccentrically the
driving gear 6 which gears into a toothed wheel mounted on the picking shaft.d.
The toothed wheel is elliptical in form and has double the number of teeth
possessed by the driving gear b, the teeth of both the wheels b and c being prefer-
ably cut and shaped as shown best in Fig. 1. The toothed wheel c may be fixed
directly upon the picking shaft d; but for convenience of adjustment we prefer to
mount it upon a bosse which is keyed upon the shaft d and to secure the toothed
wheel to the boss e by bolts f. To facilitate adjustment and to prevent slipping
when the two parts, e, are bolted together the wheel o has a circular row of teeth e
formed on its side face which teeth engage a corresponding row of teeth formed on
the side face of the flanged boss e.
The striker g is fixed on the picking shaft d in a line parallel to the longest
diameter of the elliptical wheel c so that it comes into contact with the neb h fixed
on the picking arm i and strikes it at the moment when the picking shaft d is being
turned at its quickest speed.
By this special construction and arrangement of gearing we are enabled to give a
sharper impact to the picking arm and thus obtain a more rapid as well as an easier
pick than can be obtained with ordinary gearing.
We would have it clearly understood that our invention is equally applicable to
over pick as to under pick looms, and also that in place of the striker g and
neb any suitable known equivalents for actuating the picking arm may be
employed.
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 :-
The combination with a toothed wheel & fixed eccentrically on the crankshaft a,
of an elliptical toothed wheel e mounted on the picking shaft d, said wheel c having
double the number of teeth to that of the wheel 6, substantially as and for the
purposes herein described and as shown.
Dated this 987 J M 1800
.
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicants.