Visual display of the




N ews

Conspicuous in nightmares of power company officials
are ingenious, economical human beings who tinker
witlh electric circuits, who rig up outlandish but con-
venierit wiriili. As a crowning  touch  to their
tlalldiwork, when fuses blow they use a penny. Lights
go on. Protection goes out the cellar window.
To foil these lhanidy-miien-about-tlie-lhouse, and to end
blown-fuse troubles forever, G.E. has developed an
oince of protection-a little circuit breaker to replace
the old-fashiioned fuse box. It looks very much like
anl ordinary lightinig wall-switch. When a "short"
occurs, the arc is interrupted inside a small, closed,
metal chalnlber in 0.008 of a second. A mere flip of the
handleI restores service.
Proteetioii? Tile performance is so mild you can hear
nothing and see nothing, even when 5000 amperes
are being interrupted. And the breaker is safe and
foolproof, too. 1'he complete line will include ratings
fromn t5 to 600 amperes. Let no more bridged-fuse
bogeys disturb anyone's slumbers.
J. W. Seanian, Antioch College, '29, was very active
in this developmuent.

W. .

-t I -

The Sutorbilt Corporation of Los Angeles had a
)ro)belll -- to rein(ove (fried (cocoanut Ilmeat (it's copra
in the tropics) front a ship's hold to railroad cars at
the rate of one ton every 60 seconds. That sounds
like a lot of (l.c.lll. to most people - but it had to
be done.

They built a machine with an 8-inch flexible metal
throat and an amazing appetite. Not content with
devouring copra, this machine gobbles up shiploads
of potash, soda ash, borax, shale, grain, nuts - and
even nibbles at the shirts, trousers, and hats of
How? A G-E compensator starts a 150-hp. motor.
An air compressor comes up to speed. Nature begins
to "abhor a vacuum," and up comes everything but
the bottom of the ship. If you have a cellar full of
copra to be moved - or any similar problem - let us

             STITCHING STEEL
Why not use vacuum tubes for speeding-up welders?
So thought our engineers as they were working on the
problem of stitching steel plates together with the
rapidity of a sewing machine.
Thyratron-tube control for resistance seam welders
resulted. If. W. Lord, '26 graduate of the California
Institute of Technology, received a Charles A. Coffin
Foundation Award* for developing an accurate
timing circuit using Thyratron tubes-an impor-
tant part of the control. Industry obtained a new
high-speed production tool.
This control, when applied to line- or spot-welding
machines, permits 1200 current interruptions per
minute. Thus, it makes possible the stitching together
of thin metal sheets to form gas-tight and water-
tight seams. Thyratron-controlled machines will weld
stainless steel, mild steel, chromium- and cadmium-
plated steel, aluminum alloys, and many other
materials. Steel barrels, pails, milk cans, and gasoline
tanks are just a few of the many products now
produced faster as a result of Thyratron welding
*A highly-prized company award, name.l after one of the fond"ers of
General El ctric, that is awarded annually to selected employees for
meritorious service.


 The Wisconsin Engineer