Year: 1897

page_text: The eccentric c returns then again into its previous position by means of the
spring operating in the known manner upon the picker axle i whereupon the opera-
tion begins again. By means of a conveniently arranged stopping device a too far
reverse movement of the eccentric c is prevented. As in the construction shown
the whole driving device is driven directly by the main shaft b, and as the latter
however makes a number of revolutions double that of the driving device, the arm g
of the lever g g 1 must be brought each second time out of reach of the nose & 1.
This is effected by lifting the arm g 1 of the lever g g 1 by means of a tappet m
which is fixed on the shaft n which by means of the toothed wheels o and ol
receives, half the number of turns of the main shaft b.
By the possibility of fastening the strap on different places of the eccentric
periphery, the picker axle, and therefore the shuttle can receive different velocities.
The movement will be accelerated, as the eccentric radius becomes greater in the
said direction of revolution. As the picker axle is continually turned with
accelerated movement, the shuttle receives no stroke, but is driven with accelerated
movement, whereby it receives a much quieter movement and can be kept a louger
time under the influence of the force. When the loom is turned backwards,
the nose dl of the disk d presses the arm g of the lever 991 down, and the
disk d turns without engaging the lever g g 1; the picker device remains therefore
stationary.
The eccentric c can also be brought into periodical revolution by means of any
other appropriate device.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed I declare that what I
claim is :-
(1.) The driving device for the loom picker axle, characterized by an eccentric
movable periodically from the loom in a swinging movement, ou the circumference
of which is fixed the one end of an appropriate drawing organ (strap, chain or the
like), the other end of which is wound and fixed round a roller arranged on the
picker axle, so that by the swinging of the eccentric in the corresponding direction
the drawing organ is wound up on the eccentric and thereby the roller and the
picker axle are moved in accelerated rotary movement.
(2.) A form of construction of the driving device as under Claim 1 for the loom
picker axle, characterized by the arrangement, that the periodical swinging move-
inent of the eccentric from the starting position and the interruption of this
movement is effected by a driving disk d fixed on the main shaft & of the loom and
provided with a nose d 1 by means of a lever g g 1 seated on the eccentric and
displaceable by a curved surface arranged on the loom framing, and that the
lever g g 1 by means of a tappet m which makes half as many revolutions as the
main shaft carrying the eccentric, is brought out of reach of the nose d 1 of
the disk d at each second revolution of the main shaft.
Dated this 30th day of January 1897.
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, Agents to Applicant.

page_text: Date of Application (in the United Kingdom), 30th Jan.. 1897
Complete Specification Left, 30th Jan., 1897-Accepted, 20th Mar., 1897
I, HUGO PUMPIN, of Berne, in the Republic of Switzerland 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 :-
This invention relates to a driving device for the picker axle of looms which has
the following advantage in comparison with hitherto known driving devices for the
picker axle. By means of this driving device the shuttle can receive different
velocities, whereby the shuttle does not receive a stroke, but is driven with
accelerated movement: it remains thereby a longer time under the influence of the
driving force and receives a much quieter movement. The consumption of power
for driving the picker axle is smaller, also the loom can be turned backwards,
without the picker device being put into movement. In the annexed drawing such
a driving device is shown in Figs. 1 and 2 in one form serving as example. Outside
the loom framing a and on the main shaft b is an eccentric c and a driving disk d
provided with a nose d 1. The eccentric e is loosely seated on the shaft b and is
prevented from axial displacement by means of two disks e e whilst the disk dis
arranged fixedly on the shaft b. In a support f which is detachably fixed
conveniently on the eccentric c, is seated a double armed lever gg 1, the one arm y
of which projects over the periphery of the disk d so that by turning the disk d in
the direction of the arrow the lever g g 1 is engaged by the nose d 1 on the disk d
and thereby the eccentric c is turned on the shaft b.
с
Opposite the support is fixed on the periphery of the eccentric a drawing
device, for instance a strap h, the other end of which is wound round a roller k
fixed on the picker axle i and is fixed on the same in an appropriate manner.
When now the eccentric c is turned in the direction of the arrow by means of the
disk d and the lever g g 1, the strap his wound up on the eccentric e and thus turns
the roller k and the picker axle i.
As however the picker axle i must make only a small part of a revolution for
propelling the shuttle, which propulsion is effected in the known manner by the
picker arm arranged on the axle i also the eccentric c has only to make a small
revolution corresponding for instance to the angle a wherefore the arm g of the
lever 991 must be brought out of engagement with the disk d as soon as the
eccentric has made the revolution corresponding to the angle
a.
For this purpose there is arranged on the loom framing a a correspondingly
curved surface upon which the arm gl of the lever gg1 must ride by the
engagement of the disk d whereby the arm g 1 is lifted so high, that the arm g is
thereby brought out of reach of the nose d1 and can thus be no longer be engaged
by the disk d.