Improvements in Shuttle Picking and Checking Apparatus for Looms.
Year: 1899

page_text: Date of Application, 6th Feb., 1899-Accepted, 29th Apr., 1899
COMPLETE SPECIFICATION.
Improvements in Shuttle Picking and Checking Apparatus for Looms.
We, JOSEPH DE MINISZEWSKI, of Hotel de Saxe, Warsaw, Russian Poland,
Civil Engineer, and THEOPIL DE MOHL, of Wyszki, Witebsk, Russia, Landed
Proprietor, 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 pneumatic buffer apparatus which are intended to
be placed in a loom between the striking apparatus and the shuttle race, and
which on one hand will transmit the blows to the shuttle, and on the other hand
will deaden the blows exerted by the shuttle at the ends of its race
Such an apparatus essentially comprises a casing which is mounted on the
loom so as to be movable and is moved by the striking device, and a plunger
which is movable in the casing and which acts upon the shuttle and is acted
upon thereby, whilst for the purpose of transmitting the blow from the casing
to the plunger, and the impact of the shuttle from the plunger to the casing,
there is inserted between these two parts a spring which acts in the directions
of the blow and the impact. When the plunger and the casing move relatively
to each other, air cushions are produced, which, in combination with the spring,
moderate the blow or impact.
This action can be increased by making the plunger hollow and arranging
therein one or more disc pistons rigidly attached to the casing so as to increase
the number of the pneumatic cushions that will act when a blow will be given
The accompanying drawing shows, in vertical section, an example of apparatus
according to this invention applied to one side of a loom. It is to be understood
that the loom is provided at the other end of the shuttle lace with a similar
apparatus
In a guide a there is movably mounted on the loom a casing b in which moves
a plunger which is preferably hollow and which projects from the casing and
is guided at c.
One end of the casing, which projects outwards from the guide and receives
the blow, is provided with an elastic cushion of leather or caoutchouc, whilst
the end of the plunger d that comes into contact with the shuttle, is provided
with a similar cushion l¹.
Between the outwardly directed ends of the plunger and the casing there is
provided in the latter a spring e, which, when the plunger and the casing are in
their normal relative positions, keeps the outer end of the former pressed against
a flange or collar on a guide pin f which entends through the said end of the
plunger and is fixed in the outer end of the casing. The guide pin f may be
prolonged beyond its flange or collar in the hollow plunger, and may carry one
Between the plunger d
or more disc pistons f¹, as indicated by dotted lines
and the inner surface of the casing b, there is left a space which allows of a
limited circulation of air; a similar space is left between the disc pistons f¹
and the inner surface of the hollow plunger d Elastic buffer rings 9 gl serve
to receive the blows when the casing and the plunger move into terminal
positions.

page_text: The mode of operation of the apparatus described is as follows. --
When, with the parts of the apparatus in the position of rest shown, and
shortly after the spring (not shown) that retains the shuttle has been disengaged
by any suitable mechanism, the blow is struck on the cushion of the casing b
in the duection indicated by the arrow the casing is pushed inwards in its
guide The spring is first compressed somewhat, and the pin f moves
inwards in the hollow plunger d Air cushions are thus produced in the space
that contains the spring e, the open end of the casing, which is made of greater
diameter than the est like a portion of the plunger within it, and also in front
of the disc pistons f¹ (on the left hand thereof according to the drawing) when
such are used.
But as soon as the compression of the spring e has reached a certain amount,
the plunger follows the casing bin its movement and transmits the blow to
the shuttle h, which is thereby caused to shoot over to the other side of the
loom.
The enlarged part of the plunger now bears against the buffer ring g', and
the casing has been pushed inwards to a certain extent in the guide a from
the position shown.
The buffer apparatus is in this position when the shuttle strikes against it
at the termination of its pick. The shuttle then stukes the cushion of the
plunger, pushes the plunger mwards in the casing b, and compresses the spring e,
whilst at the same time an cushions are produced in the space that contains
this spring and the enlarged chamber in the casing, and also in front of the
dise pistons f¹ (as before, on the left hand thereof) when such are used. When
the spring has been compressed to a certain extent, the casing is moved with
it, until the casing has again assumed the terminal position shown. By the
ecoil of the springe and the pneumatic cushions, the Shuttle is then pushed to
a small distance away from the inner end of the plunger, whereupon the apparatus
is ready for the next blow, whilst the shuttle is again held by its spring.
The apparatus described protects the loom from the injurious effects of the
blows produced by the shuttle, and allows of simplifying the whole arrangement
of the loom, since the straps and the wooden parts which have been necessary
heretofore, are rendered unnecessary
Having now particularly described and ascertamed the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is,-
1. A pneumatic buffer apparatus for transmitting the blow to the shuttle and
for deadening the impact thereof, comprising a casing which is movable on
the loom and receives the blow and a plunger which is movable in the said
casing, comes into direct contact with the shuttle, and is subject to the action 4
of a springe that acts in the direction of the blow or impact.
2. In a buffer apparatus of the kind specified in the preceding claim, a hollow
plunger d which is movable in the casing and within which there are arranged
disc pistons f that are rigidly fixed to the casing
Pneumatic picking apparatus for looms constructed, arranged, and operating 4
as herein before described with reference to and shown in the accompanying
drawing.
Dated this 6th day of Wahun.
1000
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London. W.C,
Agent for the Applicants.