Improvements in Automatic Machines for Grinding Balls.
Year: 1897

page_text: Date of Application, 16th Aug., 1897--Accepted, 13th Nov., 1897
COMPLETE SPECIFICATION.
Improvements in Automatic Machines for Grinding Balls.
I, FRIEDRICH MANZ, of Pforzheim, Grand-Duchy of Baden, German Empire,
Mechanical Engineer, do hereby declare the nature of this my invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement: -
My invention relates to improvements in automatic machines for grinding
balls and has for its object to provide means for automatically grinding large
quantities of balls, which after the grinding is effected are conveyed (also auto-
matically) to a sorting apparatus so constructed that balls of too large à diameter
are returned to the grinding-machine in order to be again ground.
I attain this object by the mechanism shown in the accompanying drawing, in
which similar letters denote similar parts throughout the different views and
in which
Fig. 1 is a longitudinal section of the grinding machine.
Fig. 2 is a side view of the elevator.
Fig. 3 a plan of the grinding-machine, parts being broken away.
Fig. 4 a modification of one part of the machine.
Fig. 5 is a section similar to Fig. 1 but further illustrating the invention.
In a suitable frame A is arranged a funnel-shaped trough B, which may be
turned by means of the bevel-wheels C and D. The inner conical surface of this
funnel is provided with steps E in the form of a screw. In the frame A is
arranged an adjustable vertical shaft bearing F for the shaft G, the upper end
f which is journaled in a bearing H. To this shaft G is fastened a grind-stone J
having a conical outer surface so as to fit into the funnel-shaped trough B. By
means of the adjusting screw K the grind-stone J may be lifted and lowered, so
that its outer conical surface may be accordingly removed from or brought near
to the steps E, having, as above mentioned, the form of a screw.
The upper brim of the hopper is furnished with an annular channel L, which
is connected with the stens E by means of several channels M.
The funnel-shaped trough B and the grind-stone J are turned in opposite
directions, so that the balls brought to the screw-steps E are ground whilst they
are successively running down the threads E. The ground balls N fall into the
neck O and roll through a channel S into the trough P. An elevator lifts these
balls to the sorting apparatus R. The latter consists, as shown in Figs. 2 & 3, cf
a gutter 1 having in its bottom a slit. This slit is of such breadth, that balls of
the required diameter are permitted to fall into a trough 2. Those balls, however,
having still too large a diameter roll over this slit again the the channel L
and are again ground.
As shown in Fi. 4 the funnel-shaped trough B' as well as the grind-stone ma
be inverted.
In order to maintain the funnel B in a central position to the shaft in
possesses a nut U through which the shaft G passes and which is connected by
spokes V with the funnel B. By this means the funnel B is steadied.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is:-
1. In automatic machines for grinding balls, the combination of the funnel-
shaped trough B, having its inner conical surface provided with steps E in the
for in of a screw and being capable of turning, with a conical grind-stone J, fastened
to a vertical adjustable shaft G, and capable of being turned in an opposite
direction as said trough B, and with a channel L, being connected with the
steps by means of several channels M, and with a channel S, leading to a
trough P, as and for the purpose set forth.
2. In automatic machines for grinding balls, the combination of the trough P
with the elevator Q and the sorting apparatus R, as and for the purpose set forth.
3. In automatic machines for grinding balls, the modification with the inverteri
funnel-shaped trough B¹ and grind-stone, as set forth.
1 1
101 .
1007
FRIEDRICH MANZ.
By Geo. Thos. Hyde,
1 Broad Street Buildings, London, E.C., Agent for the Applicant.