Improvements in the Method of and in Apparatus for Producing Spur Blanks.
Year: 1892

page_text: Date of Application, 6th Aug., 1892-Accepted, 17th Sept., 1892
COMPLETE SPECIFICATION.
Improvements in the Method of and in Apparatus for Producing
Spur Blanks.
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:-
In the Specification of Letters Patent bearing even date herewith, I have
described a method of and apparatus for producing Y shaped blanks for spurs.
These blanks have a circular cross section in the vertical member, and semi-
circular cross sections in the divergent members with the convexities on the outer
sides.
The present invention has for its object to convert the Y shaped blank into a
T shaped one.
I will describe my improvements with reference to the accompanying drawings
in which,
Figure is a side elevation, and Figure 2 a plan of the apparatus which I
employ.
Figure 3 represents the blank in the form in which I commence to operate
upon it.
Figures 4 and 5 illustrate in plan and longitudinal section respectively, the
vice jaws in which the blank is held during its conversion from the Y to the T
shape;
and
Figure 6 represents the completed Ţ blank.
The body of the apparatus is strongly supported on the supports and has
firmly secured to it the guides m m between which the jaws b' and 6 work.
Above the slides and jaws there is a standards in which the vertical screw g
works in suitable nuts, being operated by the hand wheel h, the spokes
of which are not shewn in Figure 2 in order not to confuse the drawing.
The jaws are adjustably connected together by means of the screwed spindle c the
screwed part of which works in a nut in one of the jaws. The spindle e is rotated
by means of the hand wheel d, so that the arrangement of the jaws, screwed
spindle, and handwheel, is that of a vice which is capable of being reciprocated in
the guides m m. This reciprocation may be effected through the connecting rod v
the crank shaft w, the wheel and pinion jk, and the fast and loose pulleys i. A fly
wheel n may be mounted on the pulley shaft to equalise the motion. Only the rim
of this fly wheel is represented in Figure 1 in order to avoid confusion.
A steel roller of cylindrical or other form, is mounted in the lower end of a
presser block 0, which is carried in suitable guides on the lower end of the screw g,
and which can consequently be raised or lowered so as to exert greater or less
pressure.
The blank, Figure 3, having been heated, the vertical limb a' is inserted between
the jaws of the vice, and the limbs a" a", are hammered down with a light hand
hammer into the horizontal position. It is preferred to form semi-circular grooves
in the jaws for the reception of the blank limbs as shewn at a Figures 4 and 5,
with cross sections corresponding with the cross sections of the blank limbs a" al
in order that the semi-circular form of the limbs may be preserved.
The jaws in which the blank is held being reciprocated, the presser roller is
forced down by means of the hand wheel h, and the limbs a" of the blank are
thereby stretched and smoothed, and the blank acquires the form illustrated by
Figure 6. It is then removed from the jaws and the process is repeated upon
another blank.

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 :-
1. The hereinbefore described method of converting Y blanks into T blanks
for spurs, substantially as and by the means set forth.
2. An apparatus for rolling T blanks for spurs, constructed arranged and
operated substantially as herein before described and as illustrated by the
accompanying drawings.
3. In an apparatus for rolling T blanks for spurs, the combination and arrangement
with a horizontally reciprocating vice, of a vertically adjustable presser roller,
substantially as herein before described and as illustrated by the accompanying
drawings.
Dated this 4th day of August A.D. 1892.
WILLIAM E. HEYS,
Agent for the Applicant.