T EVIS i - AmericanRadioHistory.Com

t'
t
laiectric
CONVERTERS
CHANGE 6 OR 12 VOLT D.C. TO
110 VOLT A.C. 60 CYCLE
Just plug into Cigar Lighter on Dash.
Size
4'xs "x6"
Wire Recorders
Amplifiers
Soldering Iron
Size
4x5 "x6"
152
Curling Irons
Radios
Turntables
Operates
Operates
ravfledrlc
Super
Model 6-71160
60 cycle
60 -75 Watts
$3795
Dictating Machines
Turntables
Small Electric Drill
1fledric
Master
Model 6 -51160
60 cycle
40 -50 Watts
$2495
LIST
Small Dictating Machines
Test Equipment, etc.
Portable Phonographs
lflecfric
Senior
Model 6 -1160
60 cycle
35-40 Watts
$1595
LIST
Operates
Size 2 1/2"x2 1/2"x41/1"
Test Equipment Short, long Wove Radios
Turntables Portable Phonographs
Lights
Electric Shavers, etc.
Tav-flecfric
Midget
Model 6 -11160
60 cycle
10 - Watts
1095
$15
Size 2 "x2 "x31/2''
Operates Test Equipment, All Electric Shavers
fully Guaranteed
See Your Jobber or Dealer
TERADO COMPANY
MFRS. Of PRECISION EQUIPMENT
1068 RAYMOND AVE. ST. PAUL 14, MINN.
In Canada write: Atlas Radio Corp., Ltd.
560 King St. West, Toronto 28, Ont.
Export Soles Division: Scheel International, Inc.,
4237 N. Lincoln Ave., Chicago 18, III., U. S. A.
Cable Address- Harscheel
again the difference in potential across
the solenoid terminals will permit less
than one milliampere to flow at which
time the relay again opens and repeats
the cycle. The cycle may be
varied by potentiometers R, and R.
which change the charging and discharging
time for the condenser. The
circuit is shown in Fig. 6A.
The relay used in the nest circuit
is the same type as RL, in Fig. 1.
"Timothy's" nest is of simple construction.
A 1' x 1' fiberboard roof
is supported by 1" x 1" x 10" wooden
pillars. A cigar box above the roof
houses all the electronic equipment
associated with the nest. A wire is
secured by staples to the pillars in
such a manner as to be just high
enough above the floor to contact
"Timothy's" tongue. The other end
of this wire is attached to the rectifier
supplying the switching action
for the light as shown in Fig. 6B. A
fiberboard base 3' x 3' is coated with
aluminum foil and the other side of
the a.c. line is attached to this floor
through a 500,000 ohm resistor. Thus, as
"Timothy" enters his nest, the ground
wire of his body makes contact with
the floor of the nest and finally the
tactile tongue touching the suspended
wire fills his condenser stomach to
the brim. A 500,000 ohm, ',z watt resistor
should be connected in series
with the rectifier and charging wire
to avoid a serious electrical shock. It
is advisable that the nest be carefully
guarded from the children as the exposed
terminals might shock them
even slightly and this is an undesirable
condition. For daily play, "Timothy's"
work -play control tube is disabled
(V,) and he will follow the
children about the room or outdoors
without requiring a nest or experiencing
a single pang of hunger!
The Shell
"Timothy's" shell is a shaped chicken
wire form and paper mâché covering
which is painted and secured to
"Timothy" by means of a central supporting
pillar of wood or metal. Actually,
"Timothy's" support for his shell
is a discarded i.f. can. This offers a
broad shell support while the two
screws which normally secure the can
to a metal chassis offer the requisite
rigidity.
The layout of "Timothy's" circuits
is optional and are constructed as simply
as possible. The vacuum tubes
as well as the turn relays in the
turtle were mounted in the cart body.
The other functional relays were
mounted on the platform above the
cart body. The platform consists of
'4" plywood fashioned to the perimeter
contour of the cart body.
"Timothy" is an initial experiment
in self- contained control systems. He
can be improved upon by increasing
his powers of perception. By allowing
him to have variations of tactile
sense, his ability to recognize and remember
shapes, temperatures and
even taste is a distinct area of improvement.
These senses will open a
EXPERIMENTERS'
SPECIALS
CATHODE RAY TUBE
REJUVENATOR
Dnnt throw away old picture tubes
with low brilliance. Restore brightness
3 to 9 months. Install In 30
seconds - no hots. See page 62.
RTN. October 1952. For parallel
AC filament eh-cults.
Special, each
Dealer quantity .9es
on
Regular List, S5.95.
$2.95
RESISTOR KIT
Carbon deposited resistors
on ceramic form. German
ma ufacture. You get 90
11 each of sresistors. alues follows in 9
compartment hinged cu
type lastic box: 100 ohm
820 ohm I watt;
2watt: 20 ohm Vs watt: 4700
ohm Ì watt; 8200 ohm I
watt; 10000 ohm I watt:
08000 oh m by w a t t:
ohm
/s watt; 470000 ohm -,k watt. Only
1,000 kilo available. Act now.
Spacial Prise, $1.98 per kit.
Potentiometer- Clarostat -1000 ohm. 2 watt. shaft exu,
t1/2"x5,5" diem Special, for $1.00
Potentiometer- Hardwick -1110 011 25 watt.
Each $1.45
Rheostat- IRC-35 ohms, 50 watts Each 2.95
Radio Tubes - 6146 -50e; 65N70T -85c; 7Y4-SSc;
7N7-78c; 7F7 -45c.
Dynamotars -Wino 156 -Input 13 V. DC Q 13 amps.
Output 250 V. 0C B 60 mill, and 300 V. DC a
225 mills. ills" ig. x 41/2- dlam.
Stuck 3R.7 Price euh $6.50
Nigh Voltage Dynamotor -Wince 602 -Input 24 -28 volta
Dc o 27 amps. Output 1100 volts DC a 400
1115. It° 1g. x 5,a" diem.
Stock 2R125 Price each $6.95
Donat overlook our previous WIN advertisement when
ordering.
Write for free catalogue of Electronic, Aircraft, Hydraulic
and other equipment.
Minimum order $2.00. Prices F.O.S. Paterson, N. J.
4croVeitit4
INCORPORATED
4 Godwin Ave. Paterson, N. J.
ELECTRON
TUBE
TECHNICIANS
We now
have
several openings
for
technicians
to work in the
fabrication
and
processing of
advanced type
electron tube
research
models.
To qualify for one
of these openings
you should be
experienced in
experimental work
for research and
development in
vacuum tubes,
which includes the
fields of mechanics,
electronics,
chemistry and
high -vacuum
techniques.
ADDRESS RESUME OF TRAINING
A ^.D NCI TO
HUGHES
RESEARCH AND
DEVELOPMENT LABORATORIES
Technical ¡
I
Personnel
1
Department
CULVER CITY,
LOS ANGELES C0_ ".TY,
CALIFORNIA
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