Page 2 - Combined_41_OCR

GENTLE RAPPING PRESERVES COLD-FORM COATING
Precision walloping to form terminal heads on wire leads is widely
used in miniature electronic wiring and packaging. Head diameter is
usually two or three times wire diameter. In a process developed by
GTI Corp., Saegertown, Pa., four multiple cold-forming steps are used
to produce lead heads with a 5:1 diameter ratio in silver-clad copper.
Each forming operation is kept gentle enough to keep the continuity
of the cladding undisturbed.

ELECTRONICS REFINE PHONE’S
SIZE, RECEPTION, AND RING
The combination of IC miniaturization and flexible
printed wiring enable all the "innards” of this ex­
perimental telephone to be mounted inside the
headset. Even the connecting cord is improved
because the number of cord conductors is re­
duced from five to two, permitting a retractor in
the base assembly to reel up the smaller cord
automatically. An electret microphone replaces
the conventional carbon unit at a weight savings
of 90%. According to designers at Northern Elec­
tric Laboratories, Ottawa, Canada, ICs are also
used to add automatic compensation for varying
line lengths to improve voice quality and volume
(no more shouting on long-distance calls), and
even the tone ringer has been converted to elec­
tronic from electromechanical for a more pleas­
ant sound.

COOLED FACE PANEL EXTENDS CRT PROJECTOR LIFE
The high-density light levels necessary to project tv, radar, or comput­
er data with a cathode-ray projection tube quickly bum out the tube
phosphors. To combat this problem, engineers at Raytheon Co., Quincy,
Mass., chose a high thermal-conductivity face panel and surrounded it
with a rim-mounted water-cooled heat exchanger. With this arrange­
ment, they report, the CRT projector can produce light levels of 50
ft-lamberts on a 3 x 4-ft screen for extended periods of time.

DOOR MOVEMENT CLEARS THE AIR
An aerosol can is attached to a bracket mounted on a door hinge.
Each time the door opens, a cam and link arrangement depresses the
spray-can button, releasing a measured amount of air freshener into
the room. Made by M. Snower & Co., Chicago, the device thus makes
“freshening” a function of people traffic.

May 29, 1969 115