Improvements in the Construction of Blanks for Spurs and in Apparatus therefor.
Year: 1892

page_text: Date of Application, 6th Aug., 1892-Accepted, 10th Sept., 1892
COMPLETE SPECIFICATION.
Improvements in the Construction of Blanks for Spurs and in
Apparatus therefor.
I, JULIUS RAFFLOER, of Iserlohn, Westphalia, in the Kingdom of Prussia
and German Empire, Lieutenant, 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 the method of and apparatus for constructing blanks to
be used in the manufacture of spurs.
The blanks, according to these improvements, are formed from heated round rods
of iron or steel previously cut to the required lengths. By means of the apparatus
hereinafter described, the short rods are slit longitudinally for a sufficient portion
of their length, and the slit portion is then opened out to a Y form, of which
the two divergent limbs are semi-circular in cross-section, and the vertical limb
circular.
I will describe my said invention with reference to the accompanying drawings,
in which,
Figure 1 is a front elevation, Figure 2 a side elevation, and Figure 3 a plan, of
the apparatus employed in the construction of the blanks.
Figure 4 is a plan of the slides, drawn to an enlarged scale.
Figure 5 is a plan, and Figure 6 a side view of a modified form of the slides
drawn to a still larger scale.
Figure 7 is a plan of the slides as shewn by Figure 5, but with the slides in a
different position.
Figure 8 is a transverse section through the slides, and
Figures 9, 10, and 11 shew the upper slide jaws in successive positions occupied
by them during the formation of the blank.
The apparatus is mounted upon the support 9, on which the standard is erected
and fixed. This standard carries bearings for the first motion shaft j, upon which
are fixed the fast and loose driving pulleys z, the fly wheel i, and the spur pinion k.
This pinion drives a spur wheel fixed-upon the crank shaft d. In Figure 2, only
the rims of the wheels i and I are indicated. The crank shaft d, reciprocates the
slide y, by means of the connecting rod c. On the lower end of the slide y there
is secured the knife b, and the lever r which may be either flexible or rigid. The
end of this lever is shewn on an enlarged scale in Figure 6, where it is represented
in contact with the upper end of the bell-crank lever e, the lower part of which is
connected with the sliding frame f, so that the vertical motion of the slide y,
causes corresponding horizontal motion of the slide f, in the direction indicated by
the arrow w.
Below the slide there are arranged two slides vv capable of motion in opposite
directions at right angles to the motion of the slide, as indicated by the arrows,
Figures 5 and 7.
The slide carries the vertical pivots h h on each of which a friction bowl is
mounted. The slides also carry two pivots xx on which the curved jaws a a are
freely mounted. These jaws are curved as shewn in the figures, and have formed
upon their upper inner edges, recesses which together amount to a semicircular
recess, one half of the semicircle being formed in each jaw.
From the construction of the apparatus as described and illustrated, it will be
seen that when the slide y is depressed, the slide f will be forced forward in the
direction indicated by the arrow w, and that the bowls on the pivots must pass
along the curved sides of the jaws a a, thus causing the latter to roll upon each
other on their convex sides. This motion displaces the slides through the

page_text: resulting opening of the jaws to which the slides are pivoted. This motion is
illustrated in its successive stages by Figures 9, 10 and 11, of which Figure 9
shews the position of the jaws at the beginning, Figure 10 that at the middle, and
Figure 11 that at the end of the stroke.
In working the apparatus, the heated short rods, are fed, one at a time, between
the jaws a a, being laid in the semi-circular recess o formed at their junction. The
knife at the lower end of the slide y, descends, and slits the rod longitudinally as
shewn by Figures 9, 10, and 11, where the knife is indicated by a thick black line.
As the knife cuts down the rod, the jaws open as already described, and the severed
sides separate into the completed Y form shewn by Figure 11. The blank is then
removed from the jaws and the operation is repeated.
In Figure 4, the jaws a a are represented as being pivoted in the centre of their
lengths, and this arrangement may be employed, if preferred, instead of the
arrangement illustrated by Figure 5. The transverse section Figure 8 is taken
along the line m-n Figure 4.
The lever t may be employed for the purpose of putting the apparatus out of
action, through the clutch u, the lever and clutch being of any known and suitable
construction.
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 :-
1. The hereinbefore described method of forming blanks for the manufacture
of spurs, which consists in slitting a short round bar through part of its
length, and opening out the slit part to a Y shape, substantially as and by the
means set forth.
2. An apparatus for producing Y shaped spur blanks, constructed arranged and
operated substantially as hereinbefore described and as illustrated by the accom-
panying drawings.
3. In an apparatus for cutting Y shaped spur blanks, a pair of curved jaws
pivoted to two slides capable of moving in opposite directions, in combination
with a pair of rolls carried by a slide capable of moving in a direction at right
angles with the direction of motion of the jaw slides, and a vertically reciprocating
slitting knife, arranged and operated substantially as hereinbefore described and as
illustrated by the accompanying drawings.
Dated this 4th day of August A.D. 1892.
WILLIAM E. HEYS,
Agent for the Applicant.