The straight poop on flippers:
Why 'dis' makes 'dat' work
It is all well and good to know that ,
"if I fix dis ... den dat will work ," and
the game will be up , but it is often
helpful to know why " dis" makes
"dat'' work . Here's what's happenin'
in a flipper .
The flipper coil consists of a
double winding, two coils in one, so
to speak . First , a "pull-in" winding
constructed of heavier gauge wire
and fewer turns . Second , a "hold -in"
winding is bypassed by the normally
closed end of stroke (EOS) switch.
The pull -in winding draws higher
current , producing a very strong
Ft..IP PE!R
Bun orJ
pull-in stroke . However , if this were
to remain energized (the player
keeps her/ his finger on the button,
say) it would soon overheat.
To reduce the high current after
the strong pull stroke is completed ,
the hold winding is put in series with
the pull -in winding by action of the
opening EOS switch that had been
bypassing the hold coil. The extra
winding in series raises the overall
resistance of the coil thus lowering
the current. Believe me , it works that
way .
With both windings "on" the
F t. IP P ER
C ou.
~--------------~~Y.------------------~
resulting magnetic field is much
weaker but is sufficient to hold the
flipper up .
Thus we can see that if the EOS is
dirty , open, or disconnected we will
have the low current or "weak"
condition . Likewise , if the hold -in
winding is open we will get a
chattering flipper . The pull -in coil
works but as soon as the EOS opens
there 's nothing to hold the flipper up
so the EOS closes again ... and
again ... and again ... Of course , if the
pull -in winding is open - nothing will
happen .
How to cure the weak flipper:
- The EOS switch should have a
great deal of "scrub" and should
open just before the flipper is fully
up .
- The flipper return spring should
not be too strong - remember the coil
has to fight this spring to move the
flipper .
- Make sure the solenoid plunger
has not " mushroomed"- just a little
bit of friction can really weaken a
flipper.
- Lube: the nylon bushing and the
linkage may be oiled but never the
solenoid plunger.
Industry tribute to Fishman
nets Israel $5.5 million
An outpouring of financial support
for Israel's economic development
was demonstrated in Chicago recent-
ly at a national dinner which honored
William S . Fishman , chairman and
chief executive officer of ARA
Services , Inc ., a diversified services
management company.
The tribute resulted in purchases
of $5 .5 million in Israel Bonds and
other securities.
The dinner was part of a
nationwide effort by the Israel Bond
Organization to provide Israel with
investment dollars through a $1
billion "Economic Development for
Peace" loan . The new issue , Sixth
Development State of Israel Bond
issue, was launched to help Israel
develop the Negev and undertake
other projects necessary for the
implementation of the peace treaty .
Ephraim Evron , Israel's ambas-
sador to the U.S. , presented his
country's " Prime Minister's Medal" to
Fishman , commending him and the
bond organization for the "tremen-
dous contribution" they have made
to the future of Israel.
Meyer Gelfand , chairman of the
Macke Company and dinner chair-
man , told the 600 representatives of
the automatic merchandising , linen -
laundry , periodicals distribution , and
health services industries who were
present that bond purchases were
"proof of the wholehearted support
of the business community , both
Jewish and non -Jewish , for Israel's
progress toward peace and economic
security ."
Howard C . Miller , president of the
Canteen
Corporation ;
Marvin
Heaps , president of ARA Services,
and Alvin W . Cohn , president of
CFS Continental , also participated in
the program.
The $1 billion " Economic De -
velopment for Peace" loan will help
to provide investment dollars for the
building of an entire new infrastruc-
ture in the Negev . Industries , jobs ,
roads , communications , transporta-
tion and energy , are to be provided
at a cost estimated at billions of
dollars .
Some of the priorities for which
Israel bond dollars is needed include
energy , water projects , telecom -
munications , and transportation .