Delaware gazette and state journal. (Wilmington, Del.) 1883-1902, 1900-03-22
GLASS .BEYEEING.

New York Sun.
Beyeled glass is not new, but IL is
now far more extensively used than
formerly. Twenty years ago, beveled
mirrors were comparatively rare, now
they are common, and are seen in
many shapes and sizes. Beveled plates,
large and small, and both straight and
bent, are used for various other pur-
poses. The process of glass beveling is
very simple, but tho work calls for
skill on the part Of the operators.
The plate to be heveled goes first to
the rouehing mill, which is solid.
heavy steel wheel about two feet and q
half in diameter, set horizontally, aud
turning at o high rate. Of speed. The
upper face, OF top of this wheel, ia
slightly roughened. Suspended over
the wheel is big hopper containing
sand, which is fed down through q
spout in such quantity as may be re.
steel wheel, The giinder holds the
plate TO be ground In his hantls, with
the edge to BIO ground of upon the face
OF the roughing mill; he shifts the
plate along rs the glass is ground
away. Tho expert grinder, holding
sheet of glass against the rouahing
wheel in this manner, will grind true
bevel with a perfectly straight line
along its inner edge, and he brings the
side beyels together with a perfectly
true angle at the oorneis.
In the ruughing mill the beveL is
wrought to shape, but its face is
rough blocking and feeling. In fact.
like what il is, ground glass. The
plate goes then to the emery wheel,
also of steel and set horizontally, .Sus-
pended over this wheel Is a little
hopper filled with emery, the emery
feeding down upon the wheel. Upon
this wheel the rough face of the berel
rs it comes from the roughing mill is
again ground, the plate being held in
the same mapher by grinder, and the
surface is brought nearer to smooth
ness,
From tho emery wheel the plate goes
to the smoothing stone which IL also
set to turn horizontally. The smooth
ing stone, which is Of an extremely fine
sandstone, is made with its upper sur
face, that against which the glass Is
brought, very slightly convex. This
stone is finished perfectly smooth and
it Is SO fine grained that 10 the touch
it seems almost to be polished, A tiny
stream of water, enough to keep ths
face of the stone wet, is made TO triekle
down upon it and the glass Is held to
this wheel Just as it was 10 the others.
and here the beveled edge is brought
down to smooth surface, but not
polished. The plate goes then to o
polishing wheel made OF wood and set
to turn vertically; the berel OF the
glass is held against the edge or
face OF this wooden wheel as II rapidly
reyolyes. The face Of the wheel ~ kept
wet and constantly supplied with pull
verified stone, Upon this wheel the
beyeled edge gets its first polish. The
glass then takes the final stop In the
heveling process. 1t goes to another
wheel, also of wood, and also turning
vertically whose face is of felt. Tho
face Of this wheel also Is kept wet and
it is supplied with a fine polishing
material called from Its color, rouge.
Here, as at the first polishing wheel,
the glass is held with the besel against
the edge, or face of the wheel. On
the rouge wheel the bevel gets it's final
polish and finish and the surface of the
beyeled edge, which after the first
operation was rough like ground glass,
is now as smooth and as polished as the
fiat surface of the plate.
Great plates that are too big to be
held by hand are locked into frame
that can he so moved Us to bring the
edges to be beveled against wheels adj
justed for the purpose.
Greek doors opened outward Is that
so? / suppose the Greeks used them to
knock book agents off the front steps.
Yonkers Statesman.