An Improved Tensioning- and Adjusting-device for Heddle-threads.
Year: 1897

page_text: COMPLETE SPECIFICATION.
An Improved Tensioning- and Adjusting-device for Heddle-threads.
I, CARL SCHULDER, of 1 Kurze Strasse in the City of Wald, in the Province
of the Rhine, German Empire, Manufacturer 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 refers to tensioning- and adjusting-devices of the kind used in
connection with the heddle-threads of a loom-harness.
In the constructions known up to now the device consists of a shell having
two series of perforations or holes arranged on opposite sides, and of a fork-like
spring having its ends bent outwards, and taking with its legs into said shell,
and with its ends through the perforations or holes of the same. By compressing
the spring, or pressing one leg against the other respectively, so as to draw the
ends of the same out of the holes where they have just been in, and by then
displacing the compressed or strained spring within the shell in one or the other
direction, and by finally relieving it from the pressure so as to cause its ends to
enter the holes up or down to which they have been displaced, the length of the
device in question may be adjusted according to the tension to be imparted to
the respective heddle-thread.
Adjusting a tensioning-device of the kind afore described is very inconvenient
in consequence of the displacement of the spring within the shell being made
difficult by the ends of the spring coming very often in gear with, and being thus
impeded by, the holes of the shell.
The object of my invention is to do away with said drawback, or to facilitate
the adjustment respectively, and I attain that purpose by letting but one leg of
the spring have a bent or angular end, and providing for the other (straight) leg
a special guide, so that the relative movements of the spring and the shell cannot
take place in any other direction than determined or allowed by that guide.
Some forms of constructions based on the principle afore revealed are shown
in the accompanying drawing, but I wish it to be understood that these forms
are to be regarded merely as examples, in that the configuration of the shell as
well as of the spring may vary in a wide degree, without departing from the
principle of my invention, i.e. letting the connection of the shell and the spring be
effected by only one leg of the latter, and using the other leg as a guide.
Referring to Figures 1 & 14 A is the shell and B the spring. The leg b' of the
latter takes into a guide a¹ formed by the non-perforated rear-wall a 4 of the shell,
and by ribs a 5 arranged within the latter and extending along the side-walls of
the same. The leg 62 of the spring has a bent end 63 adapted to take into one or
the other of the holes a 3 of the front-wall a 2 of the shell.
By pressing the leg 62 of the spring against the leg the bent end 63 of said
former leg is moved out of the hole a 3 where it has just been in, so that then the
spring and the shell are out of gear; the spring may then be displaced within the
shell, and adjusted in its position, as requisite, when the two parts in question are
again brought into gear by letting the end 63 enter the nearest hole a 3.
In the form of construction represented in Figures 3 & 4 the legs of the spring
are not formed of band-like steel as in the form of construction first described, but
of round steel-wire, and the leg 62 does not reach into the shell A, but extends
long outside the same. Instead, however, of employing steel-wire of a round

page_text: section, as in Figure 5, I may let the steel-wire have a rectangular section, see
Figure 6. Of course, the form of section of the shell should correspond to the
form of section of the wire.
Another difference between the forms of construction shown in Figures 1 & 4
consists in the direction of the bent end or hook or nose 63, in that in the first
case said hook or nose extends off the end of the leg b', whereas in the second case
the direction is opposite.
The same difference resides between the Figures 1 & 8. In this form (Figures 7
& 8) the legs b' 62 of the spring consist also of band-steel, and the leg 6' extends
along within the shell A, whereas the leg 62 is situated outside the shell and takes
into the latter only with its nose 63. To move the leg 62 off the leg b the former
is provided with a knob b4 that reaches through a suitable aperture in the leg b¹..
If the legs of the spring do not consist of steel-band, as in Figures 7 & 8, but of
wire, then I let the legs cross each other, as in Figures 3 & 4, this crossing being
a substitute for the knob 64 of Figure 8.
!
Having now particularly described and ascertained the nature of my said inven-
tion, what desire to secure by patent is :-
In a tensioning- and adjusting-device for heddle-threads, the combination with
a two-legged spring having one of its legs furnished with a hook or lateral nose,
of a shell having a series of perforations or holes for the reception of said hook
or nose, and forming a guide for the other leg of said spring, substantially and for
the purpose as described.
Dated this 16th day of February 1897
CARL SCHULDER,
By Geo. H. Rayner,
Agent for the Applicant.