The Washington herald., 1922-08-08
SIMPLE APP I!AIUS'
NEEDED TO CHARGE
STORAGE BATTERY.
Connections shown for
Attachment to Light
I Socket.

Since the Widespread introduction
Of radio receiving sets. especially
Of the vacuum tube type. which re-
|quires a storage battery. a re-
CHARGER 10 virtually Indispensable
unless one - willing TO send the
storage battery. to q rechar sing sta
ton every ten days or two weeks.
with the trouble and great expense
which such procedure involves.
The storage battery recharEer In
Figure is of the vibrating type for
use on alternating current circuits.
tween the pole. pieces OF powerful
electro ghets. rectifes each half
Of the alternating current cycle 10
that direct current is obtained.
after the transformer member of
the recharger has already stepped
down the alternating current
voltage to the low potential. re-
CURED for rechsrging purposes,
The ammeter Indicates the output
OF rectihed current which, IL avail
able for the storage battery con-
nected to the recharger BIZ means
80 es<<>toso -tCa0o fu~4s4 tn6 EtDS.
The recharger can be used any
where. 1t Is provided with a handle
SO that It can readily be carried
about from place to place, and con-
nected with any alternating cur
rent source by means of the attach
ment plug and record.
The s-volt 6-ampere hour storage
battery delivers current for an
proximately 20 operating hours to a
vacuum tube detector and two stage
amplifier, after which IL must he
recharged. =
Al 80 per cent of the homes wirrd
with electricity in the United States
are supplied with alternating cur
rent. the charging of any type of
storage battery has presented a
much more complicated problem
than were direct current ayajlabIe
Through a very simple scheme OF
connection II is possible to recharee
any radio B battery with the sarne
recharger that Is used for chareine
the A battery. Figure I illustrates
the connections employed.
The Fuse-C OF the Homcharr.r
battery in this instance is removed
30 as to open normal charging cir
cult One side OF the I1o-voit a.
ternatfng current line 10 connecteS
to the armature at N the Other 80
ing to positive termina, ~ .hs
battery through a lIo-yolt lam
In series. which acts as a curr..o,
reducing resistance. ~
Changing circuit. is comnIe,.a
from negative terminal ~ R.hst-
terry to terminal-A of the ch.ryar
The 8 cell volt A-batt.rt, =.
competed to the charger tsmi,.,.
and B In the usual manner A.
soon AZ alternating current SUNNY
Is turhed on the armature sho,,IS
start to vibrate and act as a recti-
.ying valve. completing the sB-b bat
very charging circuit during the
proper part of the A. C. cycle,
merely delivering to the B-battery
series OF intermittent uni-direc-
tional current impulses.
Is, necessary that either the
positive or negative pole of both A
ana d battery be connected to the
.erminal-A. II this Is not done B.
battery will discharge instead of
charge the same being indicated
py the series lamp-L glowing with
intense brilliancy. When connec-
tions nave been properly made and
S-Dattery Is charging. this lamp
burns quite dull.
A very simple method of making
the proper connections is shown in
Figure NO. 2. The material re-
CURED can be purchased at a cost
OF Tess than 50 from any electrical
dealer and consists of:
One twq-way socket plug or du-
pick current tap. 81: one attach
ment plug. rs cents: one porcelain
wall receptacle. 25 cents; one ten
FOOT lamp cord. SO cents.
The two-way socket plug il
screwed into lamp socket and the
standard ttcnment plugs screwed
INTO one side thereof Another at
taehment plug is inserted In the
otner side of current tap, one lead
being connected in series with the
lio-voit lamp-L of the proper size.
the other lead running direct to
sSrew-N OF the vibrator assembly.
The other terminal of, lamp.L is
connected to the positive terminal
OF B-battery and the other side of
B-battery running to terminal-A.
Fuse-C Is. then removed. A-bat-
terry connected. and lamp socket
turned on. -
1t is impossible to charge both
A and B battery at the same time,
as with fuse-C in place the B-bat-
terry will discharge through trans
former secondary.
As the ammeter is not connected
when fuse is out. this instrument
does not indicate charging rate of
B-battery. However. when lamp-L
burns dull the batteries are charg-,
ing properly and no other indica-