Mineral Point tribune. (Mineral Point, Wis.) 1869-1938, 1893-11-25

The gauge then moves away, and "a
lude punch forms the head by srik-
in- the end which rested against The
gauge.
When this is fiLishcd the dies seP;u-
ate and deliver the pin into one of
the great many grooves in the face
of tile wheel about q foot in diameter.
and Just rs wide across its face Is the
pin is long
When the pin IS taken by the wheel
ii las 10 point but as Tire wheel
turns ID rubs the pins a-lillst an out
side band. which causes each ore to
roll in its groove. and al r1e sarIe time
carries them past "a set ii rapidly
moving tiles, which brush against the
blunt ends and sharpeus them roughly.
They next pass against the faces Of
two grinding wheels, which smooth
the points, and then 10 q rapidly NOV
ing leather band having fine emvSy
glued 10 its face. This gives them
the finish polish, ana as they leave the
baud the- are dropped into a box
underneath the machine.
After this the pins are plated with
Tin TO give them q bright. Silycry ap-
pearance. They are prepared for p.3t-
Ing by being first immersed in weak
sulphuric acid to remove all grease,
and then dried by being placed
busbel or SO at time. with about the
same quantity Of sawdust-in ma
chine called q tumbling barrel.
This Is simply a cask suspended on
shaft which passed through it
lengthwise Two or three hours roll
ing in sawdust cleans the pins and
wears away any little roughness which
the machine may have caused.
Pms and sawdust are taken together
from the barrel and allowed 10 fall
in a steady stream through blast Of
4ir. The slwdust, being the lighter,
is blown over into "a large, room-lise
box, While the pins, being heavier,
fan into a bin below.
After this they are spread out in
trays having sheets Of sine in their
bottoms which have previously been
connected with one OF the wires of an
electric battery. The trays are then
placed in q tank containing solution
OF tin in muratc acid, and the other
wire Of the battery is inserted in the
solution. Electrical action immediate
Is begins and deposits metallic tin on
the entire surface of each pin.
They are then washed in tank OF
1ft1f 1rr
barrels with hot sawdust When they
have been dried and cleaned Of the
sawdust, as in the former instance,
they are put into a large slowly re.
volving cOpperLned tub which is tilted
at an angle Of about Is degrees.
As this reyolves the pins Keep slid.
ing down the smooth copper 10 The
lower side. This constant rubbing
against the tub an1 against each other
| polishes them.
/ 1t was the practice formerly to allow
pins of all lengths to become mixed
. in the different operations, and, after
polishing. to separate them by very
ingenious machine bur ii has been
found more economical 10 keep each
! size TO itself
/ From the polishing tub the pins are
carried TO the "stlc6er," where they
! fan rom a hopper on an inclined
plane in which are q number of Sits
! The pins catch in these Sits and, hang
ing by their heads, Glide down the in
cline 10 the apparatus which inserts
I . hmm ian Tho manor
A. the number Of pins ia a row on
/ the paper and the number Of Sits arc
I the SANE. the entire row is stuck a
once hy an ingenious device, Which
takes one pin from each slit and in
serts them All at once in the two ridges
which have been crimpcd in the paper
/ by a wheel that holds it in place to Pc
/ ceiYe the pins.
4 At the same time the wheel crimp:
the pape- it spaces the rows, - tha'
when filled with pins the paper vii
/ fold up properly,
I This whole machine IS 50 delicate II
It's action that a single bent pin o.
/ otherwise imperfect pin viii cause thu
machine to stop feeding until the at
/ tendant removes it; yet its operation il
80 rapid that one machine Will stlcE
$1,000 pins an hour.
AS the long strip Of paper on which
( the pins are stuck comes from the ma
. chine it is cut into proper lengths b!
girls, who then fold and pack tbs
. papers in bundles ready for shipment
.
IT'S TWICE A WONDER.