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This page was created in Jan 2022
Well, I asked the
question: Is the “Knock Off” Switch/Circuit on any of the Schematics PINBALL GAMBLING DEVICES NCJ Number 143852 Journal FBI Law Enforcement Bulletin Dated: (April 1979) Author(s) R M Furgerson Date Published 1979 Length 8 Pages Annotation While the Federal judicial system agrees that pinball
machines are legal recreational devices, the multiple-coin, electromechanical
bingo-type machine is a gambling device and therefore subject to the Federal
gambling device tax. However, many law enforcement officers are unfamiliar
with the differences between these two types of machine. Abstract The primary objective of the bingo gambling device is to
obtain certain arrangements of lighted numbers on the bingo card. At least
one coin is required to play, but many more are generally used in each game
to build up scores and features. These features may include moveable numbers
in the bingo card, 4-corners, and the double-or-nothing option. Players may
be able to earn as many as 600 free plays, but the machine has the capability
to clear all free plays appearing on the register through use of a
"knock-off" circuit. Bingo machines are usually equipped with a
built-in governor which automatically adjusts the chances of obtaining
greater scores and features; the governor is therefore effectively able to
control the profit level of the machine. The FBI laboratory is equipped to
help local law enforcement identify these types of devices in accordance with
the law. 3 figures and 8 notes Sale Source National Institute of Justice/ Box 6000, Dept F, Rockville, MD
20849, United States NCJRS Photocopy Services Box 6000, Rockville, MD
20849-6000, United States Publication Format: Reprinted from the FBI Law Enforcement
Bulletin, April 1979
So, just how does
the “knock-off” work`…Phil Bogema helps explain`
1974 Bali`.…the
typical Bingo input circuitry on 95% of the Bally’s The “toggle” switch
just inside the machine right off of the A.C. power
cord` In response to my
question of “is the knock-off circuitry shown on any of the schematics” Phil provides an
initial response and a follow-up to my schematic`
_ Very Cool _ https://bingo.cdyn.com/techno/commonproblems/freeplay/anticheat.html Of course, Phil
covers this as well`…coming from the perspective of the Anti-Cheat Relay
When the Toggle Sw is opened and the A.C. voltage is removed from the
transformer, The Power Rail on
the secondary open and the (3) switches tied to the Anti-Cheat Relay all
open` And then the Replay
Register is controlled by the Pulse Cam and the replays are clicked off` _ Gone for Forever
_ So, read Phil’s
write-up carefully, he tells you how to disable this function at home` …so, your games
will not be lost if you shut the Bingo down for any reason Russ Jensen – “Pingames & Gambling” [[Orig. Op. Page 9]] This modern
five ball "in line" or "bingo" type game was developed as
machines of the one ball variety began to meet judicial disapproval.9/
Aside from the more sophisticated five ball game which is played on these
machines, the principal difference between them and the earlier versions is
the elimination of the automatic pay-off apparatus. Instead, these
modern machines as you have described them are equipped with mechanisms
commonly referred to as the "three digit
counter" and the "knock-off" circuit, which function as
follows: The Three
Digit Counter: This device
on the backboard of the machine records the number of "free plays"
which have been won by the player. On some current models, we
understand that it is possible to win up to 600 free games on one operation
of the machine and to accumulate free games up to a total of 999. The
"Knock-Off" Circuit: This device
allows unplayed "free games" to be
"knocked off" i.e., subtracted from the number appearing on the three digit counter by means of triggering a concealed
button or switch. Simultaneously, the games removed are recorded on a
meter locked inside the machine.10/ In addition as previously noted the type of machine which we
are now considering continues to be equipped with the multiple coin
"search relay" unit feature by which a player may increase the
stake and number of possible winning combinations through the deposit of
additional coins before playing.
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