Improvements in Automatic Tension Device for Grain Binders.
Year: 1898

page_text: Date of Application, 4th Jan., 1898-Accepted, 5th Mar., 1898
COMPLETE SPECIFICATION.
Improvements in Automatic Tension Device for Grain Binders.
I, FRANK JOSEPH DVORAK, residing at Festina, in the County of Winnesheik,
and State of Iowa, United States of America, Gentleman, 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 :-
My invention relates to an automatic tension device for grain binders; and
the object is to provide a device of this class that will ensure a uniform tension,
on all of the bundles, and thereby secure the same in a regular and systematic
manner.
To this end the invention consists in the construction, combination and arrange-
ment of the same as will be hereinafter more fully described and particularly
pointed out in the claims.
In the accompanying drawings the same reference characters indicate the same
parts of the invention.
Figure 1 is a front elevation of my improved tension device for grain binders.
Figure 2 is a side elevation.
Figure 3 is a longitudinal section.
Figure 4 is a transverse section, and
Figure 5 is a horizontal section of the same on the line 5-5 of Fig. 1.
This invention relates particularly to that class of tension devices employed in
twine binders.
1 represents a bracket in the parallel arms 2-2 of which is journalled a shaft 3,
on which is mounted a cylindrical roller 4. These arms are provided with dovetail
guide-slots 5-5, which receive the correspondingly formed parallel legs 6-6 of
the yoke 7, adjustably secured therein by the bolt 8, connecting the cross-bar 9
of the bracket 1, and the corresponding cross-bar 10 of the yoke 7.
A spiral spring 12 encompasses the projecting end of said bolt, and it extends
between the cross-bar 10 and the thumb-nut 13, so that its tension is exerted
to force the yoke downwardly into the bracket.
A fluted roller 14 is journaled on a bolt 15, mounted in the inner ends of the
legs 6, 6, and parallel with the cylindrical roller 4.
16 16 represent guide-bars connecting the parallel arms 2-2 of the bracket 1,
and they are provided with aligned guide-orifices 17-17, arranged in the same
plane with the meeting surfaces of the rollers 4 and 14, between which the binder
twine 18 passes and the friction so imparted to the twine insures the perfect tension
on the bundle and facilitates the proper formation of the knob. By using a
Huted roller in conection with the cylindrical roller, the overcoming of the twine
due to the uneven movement of the needle is avoided, and a uniformity of feed
secured, which would otherwise be unattainable.

page_text: 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:
-
A tension device for grain binders, comprising the cross-bar 9 and the bracket 1
formed with the vertical parallel arms 2-2, having the dovetail guide-slots 5-5,
the yoke 7 formed with the cross-bar 10, and the dovetail parallel legs 6-6
engaging said slots, the bolt 8 passing through the cross-bar 9 of the bracket and
the cross-bar 10 of the yoke, the spring 12 encompassing the projecting end of said
bolt between the yoke and the nut 13, the fluted roller 14 journaled in the lower
ends of the legs 6-6, the cylindrical roller 4 journaled between the arms 2-2 in
the same vertical plane with the roller 4, and the vertical parallel guide-bars 16-16
connecting the parallel arms 2-2 of the bracket 1 and provided with the aligned
guide-orifices 17-17 arranged in the same horizontal plane with the meeting
surfaces of the rollers 4 and 14, substantially as shown and described.
Dated this 4th day of January 1897.
WHEATLEY AND MACKENZIE,
40, Chancery Lane, London, W.C., Agents.