Improvements in or relating to Selvage Holders for Finishing and Stretching Machines and the like.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to Selvage Holders for Finishing and
Stretching Machines and the like.
I EDWARD OHL of Strassburg in the Empire of Germany, Engineer 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:-
The automatic solvage holder for stretching machines and finishing machines which
can be regulated to seize and tighten the fabric to be finished at the desired place as
regulated by the selvage is based upon the following principle.
K being the stationary jaw of the clasp e a movable jaw which holds the fabric J
with a power increasing with the power given to it. a a movable point not being in
one with the jaw of the clasp and which rests upon the fabric so that this point a
adjustably fastened to the jawe determines the opening of the holder as long as the
fabric J is located between this point a and the jaw as well as the closing of the
jaw when the fabric has left the point a.
By this principle, the closer the point a is brought to the jaw c the nearor is the
fabric held to the edge.
The use of this principle which I claim solves the question of seizing and tightening
automatically the fabric at the place determined by the selvage without any assistance
from the workman. It is always the motion of the point a a motion caused by the
fabric itself which communicates the motion to the jaws of the clasps.
Sheet I shows mechanical devices.
Sheet 11 electric devices for effecting the purpose of this invention.
The figures 1 and 2 show the holder in cross section.
Fig. 3 is a front elevation of the jaw c with the use of the eccentrics d'""
and d, each of these eccentrics has its axis at V and they clasp the fabric auto-
matically whatever may be the direction of the traction, in its longitudinal
direction.
Taken back into their positions of rest by means of small springs (not shown in the
drawing) these eccentric parts draw near again in pairs to the jaw K as the fabric
moves in one or other direction. However the fabric is only tightened when the
principal clasp e is closed and placed upon the selvage. The pressure of the eccentrics
increases with the tension exercised upon the fabric as does the tension of the
principal jaw c.
It is evident that the eccentric parts d' d d d may be arranged in the stationary
part K of the clasp, they may also be arranged at the same time in the two jaws K
and c.
Fig. 4 is a front elevation of two holders attached to two jointed links m and m³.
Fig. 5 is a plan view.
h
C
The automatic selvage holder consists of two jaws k and c, the one k fastened to a
link and being in one piece therewith, the other c movable on spindle o is provided
with a lever of two parallel arms g this lever carries a pivot on which the pulley e
rotates. A small spindle turning on the screw pivots ; engaged in the bent supports p
is in one with the lever b which ends in a fork to receive the pulley e. The spindle h
allows the motor rod a to pass with slight friction, the extremity of this rod may be
brought near or moved off at option from the point of contact of the jaws c and k. A
Screw V permits the rod a to be secured to the axis h.
Supposing that the fabric is between the jaw k of the clasp Fig. 2 and the rod a,
the lifting of a lifts the fork leverb which by means of the lever g transfers the motion
to the jaw c which opens and remains open as long as the extremity of the rod a
reposes on the fabric.

page_text: But as soon as the latter passes from under a the rod a falls and allows the jaw to
fall on to the material at the solvage and clasp it with a force increasing with the
tension exercised upon it
In the figures 1. 24 and 5 Sheet I the clasps are fastened to the parts of a chain
turning horizontally, and in this case the weight of the parts of the clasp always
endeavour to engage the movable parts with the jaw k. The clasps work vertically.
A spring could also be arranged to do this work.
The releasing of the fabric is operated by means of a pressure by pulleys
or the like on the rod a or directly on the jaw c so that it may adapt the position of
Fig. 2 of the sheet.
Figs. 67 and 9 represent a clasp arranged on a chain driven by vertical wheels.
This chain carries universal hinges or compass hinges r an arrangement allowing it to
follow curved or broken lines in order to exercise tension upon the fabric in the
direction of its width and to follow the necessary automatic movements of the machine.
The chain mm may be geared either horizontally or vertically according to whether
the links are placed laterally or below.
As regards the clasp, the opening and the closing of the jaw c is operated by means
of a small rod which connects the motor rod u with the movable parte of the clasp.
Here also the jaw e cannot close until the fabric between the rod a and the jaw k has
left the extremity of the arm a.
In order to increase the opening angle of the jaw e generally it is clear that one has
to increase the displacement angle of the motor rod a which can be done by arranging
a hollow in the stationary jaw of the clasp. This arrangement allows likewise the
approaching of a to c.
The same object can be obtained by arranging a hollow in c in order to pass freely
above a.
Generally whatever may be the mode of working of the principle above named it is
always the point a guiding the selvage underneath the clasp which determines the
timely closing of the lauer.
The Sheet No. 11 gives drawings of automatic clasps operated by means of electro-
magnets.
Fig. 1 represents a diagram of the electromagnets E' and E acting upon a lover Bg
which opens or closes under their influence the jaw o q c and K.
Fig. 2 shows a diagram where the electromagnet acts direct upon the jaw c which
closes by its own weight to clasp the web.
In Fig. I e is the jaw of the clasp having its centre of articulation at o being able
to open and to close to clasp the web.
E is the closing electro magnet. E' the opening electromagnet of the jaw c. Da
soft iron plate in connection with the rod By. M the metal contact closing the circuit
for the closing electro mugnot. M³ the metal contact closing the circuit for the opening
electro magnet. L the battery or dynamo electric machine, a h the motor bar touching
with its end the fabric when the jawe is open and approaching k when the clasp is
closed. This rod has its centre of articulation at hand by its angular displacenient
displaces the rod F on the axis h. The first supply of the electric current is to the
axis and returns to the negative pole of the pile. The second supply of the current
is to the point A determined by the position of F the web not being any more
between and the motor rod a, this second supply is connected with one of the ends
of the closing electromagnet E. The third supply of the current is to the point A
that is to the point determined by the displacement of the rol F in F' around the
rotary axis a displacement caused by the corresponding motion of the motor rod a
and produced by the presence of the wob between a and k. When the web has left
the guide rod a this latter is displaced through a certain angle and the bar F which
follows arrives at the limit A and closes the circuit. Directly the electric current
from the positive pole roaches the axis g of the lever B Dg and following the rod Bg
arrives at the contact M then at the closing electro magnet E and returns traversing
the rod F to the negative pole of the pile. The electromagnet E traversed by the
electric current attracts the plate D and the lever Bg rotates the jaw c around the

page_text: point o pressing it instantly upon the web kept between the stationary jaw k and the
movable jaw c of the clasp. This instantaneous work takes place as soon as the web
is no more between the extremities of a and k. At the same time the contact M is left.
by the lever Bg and the electric current is interrupted. The lever g D B which has
left. M arrives on M' and is thus ready to allow the current to pass when the lever F
arrives at the point A' to open the jaw of the clasp and at the same time to replace
the lever Bg in contact with M in order to allow the closing again when the lever F
connected to the motor rod a returns to A.
Fio 3 sheet. I renrosents the closed alaen pressing the fabric
point o pressing it instantly upon the web kept between the stationary jaw k and the
movable jaw c of the clasp. This instantaneous work takes place as soon as the web
is no more between the extremities of a and k. At the same time the contact M is left.
by the lever Bg and the electric current is interrupted. The lever g D B which has
left M arrives on M' and is thus ready to allow the current to pass when the lever F
arrives at the point A' to open the jaw of the clasp and at the same time to replace
the lever Bg in contact with M in order to allow the closing again when the lever F
connected to the motor rod a returns to A.
Fig 3 sheet I represents the closed almen pressing the fabric
Fig. 4 sheet II shows the clasp open to allow the fabric to pass.
Figs. 5 and 6 are front elevations.
Fig. 7 is a plan.
E and E' are the electromagnets for shutting and opening the jaws, c is the movable
jaw, & the stationary jaw of the clasp, a the motor rod engaged on spindle h and
adjustable to and from c. Fa bar for displacement from A to A' and following the
movement of the rod a in order to communicate the electric current either to E or E¹.
B Dg a lever ending in a fork and carrying the soft iron plate D made in one piece
with the rod Bg, the fork operates the jaw c by means of the pulley 9 and the lever
carrying the said pulley. M and M¹ are contacts for the lever Bg to be regulated by
the screws m and m¹.
Figs. 2 and 8 represent a diagram and a section of an electro magnetic clasp where
the closing electro magnet is left out so that the jaw c closes by the action of its own
weight or by a spring and that the opening is produced by the opening electro
magnet E which instead of acting upon an intermediate lover acts direct upon the
part o D of the jaw c.
When the fabric has left the rod a this latter leaves the contact A', the electrio
current is interrupted, ceases its action upon the electromagnet E', the jaw c falls again
upon the selvage. When on the contrary the fabric .lies between a and k, a touches
with its end the spring A' which re-establishes the electric current across the electro
magnet E¹ the soft iron plate is attracted and consequently c is open and the web is
free.
Ali these arrangements allow the fabric to be secured at option or disengaged from
the jaws of the clasps when a or F is operated in the one or other manner. The electro
magnets and the clasps may be arranged and may have the shape considered best for
the special purposes in question. The electricity may be conducted by means of
special conducting wires or by the different parts of the machines connected for the
purpose.
The friction chain remains to be described the links of which are provided as
aforesaid with universal joints u. Figs. 3, 4, 5, 6 and 7 sheet II.
T is a chain link ending at one end into a vertical hinge and at the other one in a
hinge perpendicular to the first one. A part V the shape of which may be spherical
permits the pivot to traverse it horizontally and receives vertically the two screws s
and & Figs. 5, 6 and 7 which form the pintle of the vertical hinge these screws may be
maintained in their position by a rivetted pin which traverses thom as the pivot on
both sides. The chain itself instead of being connected by cam wheels is moved by a
grooved friction wheel which receives the links on one of the sides in conical surfaces.
Smooth parallel planed surfaces surrounding these links allow the chains to slide in the
rails and to follow their diverging and other motions. The chains may be moved
vertically or horizontally according to the position of the conical or bevelled surfaces
on the links.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
In a selvage holder or clasp for finishing and stretching machines.
1. The combination of the jaws k and c with a rod or equivalent device a adapted to
41
1

page_text: jaws or one of them that the latter are open when the cloth is in contact with a or
deflects the same and closed when the cloth is not in contact therewith or does not
deflect the same.
2. The rod a connected with the jaw c by mechanically or electrically operated or
controlled devices substantially as heroin described and illustrated for the purposo set
forth.
3. The combination of the fixed jaw
and the movable jaw c with the contrary
eccentrics d d¹ for longitudinal holding of the fabric in the clasp substantially as set
forth.
4. The combination of the jaws adapted to hold the fabric of the friction chain with
universal joints substantially as herein described and illustratod.
Duded this and low of Nov 1890
HERBERT & Co.,
18. Buckingham Street, Strand, London, W.C., Agents to Applicant.