Episode 91 - The Reflex

For Amusement Only EM and Bingo Pinball Podcast·podcast_episode·13m 23s·analyzed·Jun 10, 2015

Analysis

claude-haiku-4-5-20251001 · $0.026

TL;DR

Deep dive into bingo pinball's reflex unit: secret auto-odds mechanism, operator adjustments, and historical documentation gap.

Summary

Nick Baldridge provides a comprehensive technical and historical overview of the reflex unit, an automatic proportioning circuit used in bingo and horse racing pinball machines to adjust odds and feature availability based on gameplay. The reflex unit was a closely guarded trade secret that remained undocumented on schematics until Bally's transition to 20-hole games in the 1970s, likely related to the company's efforts to distance itself from gambling associations after becoming publicly traded. Operators could adjust reflex behavior through Jones plug configurations, gear swaps, and various modifications, though many lacked understanding of the mechanism's purpose and function.

Key Claims

The reflex unit was an automatic proportioning circuit that stepped down with each coin/play and stepped up with wins, making machines progressively tighter as players won.
high confidence · Nick Baldridge explaining core reflex mechanics, drawing from his research and experience with EM bingo machines
The reflex unit was not documented on schematics and remained a trade secret from its invention in horse racing games in the 1940s through the 1960s magic screen games.
high confidence · Nick Baldridge on reflex documentation history and secrecy practices
Bally suddenly began documenting the reflex unit on schematics when they switched to creating 20-hole games.
high confidence · Nick Baldridge on the shift in documentation practices during a specific product transition
Bally's decision to document the reflex may have been connected to the company becoming publicly traded and wanting to distance itself from gambling associations.
medium confidence · Nick Baldridge acknowledges this is speculation based on what he 'heard' and cannot confirm
Phil Hooper has produced the first comprehensive documentation on how the reflex unit works and how to adjust it for permissiveness or tightness.
high confidence · Nick Baldridge crediting Phil Hooper for detailed technical write-up on reflex operation
United also had a reflex unit and competed fiercely with Bally in bingo machine development.
high confidence · Nick Baldridge referencing his previous overview episode on United versus Bally competition
In the 1970s, a Jones plug adjustment (four wires, 6 or 8 pin female connector) was introduced to allow operators to adjust reflex permissiveness without internal modifications.
high confidence · Nick Baldridge describing the Jones plug reflex adjustment mechanism
Some operators would drill bolts or screws through the reflex unit to prevent it from stepping down, effectively locking it at maximum permissiveness.

Notable Quotes

“The worst time to play a bingo is right after someone has won a bunch of credits on it. If you walk up and start trying to play, you will end up spending much more money in order to achieve the same effect.”
Nick Baldridge @ ~3:45 — Explains the practical player experience consequence of reflex mechanics — demonstrates how the system affected casual players' economics
“This is why Phil Bogan's strategy of only playing a few coins and starting with even the lowest odds, where you have your greatest chance of recouping your cost, is wise.”
Nick Baldridge @ ~4:30 — Attributes specific play strategy to understanding reflex unit behavior; shows expert player adaptation
“The reflex unit was what amounted to a trade secret. The reflex unit was not documented and it was not put on the schematics. This persisted for years and years and years.”
Nick Baldridge @ ~5:15 — Core claim about the secretive nature and undocumented status of reflex technology across decades
“I heard that as Bally became a publicly traded company they wanted to distance themselves a bit from their gambling image, and so they started making the games a little friendlier.”
Nick Baldridge @ ~6:45 — Speculative theory about business/regulatory context for documentation shift; explicitly marked as unverified
“These reflex gears are probably about two inches in diameter... There were several different gears that were shipped with each machine and the operator could swap them out.”
Nick Baldridge @ ~11:30 — Describes operator-accessible tuning hardware; invites community correction on specifications
“The machines would be shipped with extra reflex gears... the operator could swap them out... to get the optimal ratio of step up versus step down. The operators wanted it to step up faster in order to take more money.”
Nick Baldridge @ ~12:00 — Clarifies operator motivations and economic incentives in reflex tuning practices
“For the most part, collectors like to make it as loose as possible... I prefer to have mine operating as it came to me.”

Entities

Nick BaldridgepersonPhil HooperpersonPhil BoganpersonBallycompanyUnitedcompanyVic CamppersonFor Amusement Only Podcastorganizationreflex unitproductJones plugproduct

Signals

?
historical_signal: The reflex unit remained an undocumented trade secret from the 1940s through the 1960s, only appearing on schematics when Bally transitioned to 20-hole games in the 1970s.
high · Nick Baldridge: 'The reflex unit was what amounted to a trade secret. The reflex unit was not documented and it was not put on the schematics. This persisted for years and years and years.' He cites this persisting 'from the reflex's invention with the horse racing games in the 1940s up through the 60s and the magic screen games.'
?
business_signal: Bally's decision to document the reflex unit on schematics may have been motivated by the company's transition to public company status and desire to distance itself from gambling associations.
medium · Nick Baldridge: 'I heard that as Bally became a publicly traded company they wanted to distance themselves a bit from their gambling image. And so they started making the games a little friendlier.' He explicitly notes 'I don't know anything but I heard' and 'of course I can confirm anything,' marking this as speculation.
?
restoration_signal: Operators developed multiple methods to modify reflex unit behavior, including gear swaps, Jones plug adjustments, gaff bolts, and destructive modifications like drilling through the unit.
high · Nick Baldridge: 'The operators would sometimes drive a bolt or a screw through the reflex unit itself, which would prevent the unit from stepping down.' Also describes gear swaps, Jones plug configurations, and resetting reflex to permissive position.
?
product_concern: Drilling modifications through sealed reflex units to lock them created difficult-to-reverse damage risks, including broken fingers, damaged rivets, and wiring harm.
medium · Nick Baldridge: 'It does not look fun to reverse. You back out the screw or bolt and then hope that it didn't damage the fingers of the unit or drill through any rivets or any of the wiring behind the disc.'

Topics

reflex unit mechanics and functionprimarybingo machine history and developmentprimaryoperator knowledge and machine tuning practicesprimarytrade secrets and documentation gaps in pinball historyprimarycollector philosophy on machine preservation vs. modificationsecondaryBally's business transitions and public company statussecondarycompetition between Bally and Unitedsecondaryplayer strategy adaptation to machine behaviormentioned

Sentiment

neutral(0.55)— Speaker maintains educational, informative tone throughout. Shows enthusiasm for the technical complexity and historical mystery of the reflex unit. Appreciates the engineering ingenuity ('it's pretty fascinating how they thought of this back in the 40s'). No criticism of manufacturers or negative sentiment toward machines or mechanics. Acknowledges speculation vs. confirmed facts, maintaining appropriate epistemic humility.

Transcript

groq_whisper · $0.040

what's that sound it's for amusement only the em and bingo pinball podcast welcome back to for amusement only this is Nicholas Baldridge it's here it's here it's finally here the episode about the reflex unit so as i've mentioned in previous podcasts over and over again the reflex was essentially an auto portioning circuit that would engage as you won or as you played coins on a bingo. Each time that you put in a coin, the reflex unit would step down and when you won, the reflex unit would step up. Now in the reflex's default position with as many pins active on the rivets on the disk, it would make the machine more giving. So each time you pushed a button or put in a coin, you were more likely to connect the necessary circuitry in order to grant you a feature or an odds jump or, you know, the thing that you were playing for. So, as you won, as you racked up the replays on the machine, the machine started to clamp down, and it was less and less likely to grant you those. You had to put in more and more money or push the button more and more times in order to get the same features and odds jumps. the worst time to play a bingo is right after someone has won a bunch of credits on it. If you walk up and start trying to play, you will end up spending much more money in order to achieve the same effect. This is why Phil Bogan's strategy of only playing a few coins and starting with even the lowest odds, where you have your greatest chance of recouping your cost, is wise. The other thing to note about the reflex is that it was what amounted to a trade secret. the reflex unit was not documented and it was not put on the schematics. This persisted for years and years and years starting from the reflex's invention with the horse racing games in the 1940s up through the 60s and the magic screen games. now when Bally switched to creating the 20 hole games the reflex unit suddenly started appearing on the schematics and it's a really interesting thought process that must have happened now I read some stuff at this time and of course I can confirm anything because I don know anything but I heard that as Bally became a publicly traded company they wanted to distance themselves a bit from their gambling image. and so they started making the games a little friendlier I guess you'd say and this is one way that perhaps they did this because the reflex unit was a mystery to operators as well and I'll get back to that point in a minute but as a player something that I've heard before is that the machine would take more button presses over time, and that's 100% due to this reflex unit. Now, United also had a reflex unit, and as I mentioned in my brief overview of United versus Bally, they were in stiff, stiff competition trying to one-up each other with these bingo machines. And as I've also mentioned before, these bingos earned big money. They were a big deal. So both Bally and United sold an awful lot of them, and they earned a lot for the operators. If you listen to the Vic Camp interview, you'll hear that in New Jersey, there were essentially the same group of machines maintained for years and years and years without being switched out. Well, those machines are racking in the money. It's just incredible to think about. But, getting back to the reflex. In the 1970s, they started putting in a reflex adjustment. This reflex adjustment was a Jones plug, which was comprised of four different wires. The idea being, it would mate into a 6 or 8 pin female Jones plug. Now, this 6 or 8 pin female Jones plug would only have two or four wires attached. And so you would want to connect the most wires in order to make the reflex as permissive as possible. What this would do is it would allow the reflex to step down faster with that adjustment than it would if you had none of the wires connected. So, the reflex is also interesting because the machines would be shipped with extra reflex gears. These reflex gears are probably about two inches in diameter. I'm sure someone will correct me. Maybe they're two and a half or three. Well, at any rate, there were several different gears that were shipped with each machine and the operator could swap them out Now there were operators that were in the know as to what these things were and again I come back to that in just a second but they would swap out the gear to get the optimal ratio of step up versus step down The operators wanted it to step up faster in order to take more money. Most operators wouldn't want it to step down at a one-to-one ratio. So, the gears were another way that they could be adjusted. Now, some operators, when they took the unit apart, this is a mostly sealed unit, by the way. It's not something that you can access, even, because the unit is entirely enclosed. You can look in the side and see the gear and where it mates to another gear, but you can't actually look in and see the disc and the fingers or the wipers that are making contact on the rivets. It's pretty fascinating when you think about it because this is all kind of hush-hush secret stuff. But the operators would sometimes drive a bolt or a screw through the reflex unit itself, which would prevent the unit from stepping down. I've never had a game that had this modification done, but I've certainly seen horrible pictures online of games where this has happened. and it does not look fun to reverse. You back out the screw or bolt and then hope that it didn't damage the fingers of the unit or drill through any rivets or any of the wiring behind the disc. It's kind of interesting. So, again, the reflex unit being such a secret is pretty fascinating to me because it wasn't documented until very recently. Phil Hooper has done an excellent write-up on how the reflex unit works, how to make it more permissive, or how to tighten it up. For the most part, collectors like to make it as loose as possible. And there are several ways to do this. One is to reset the reflex into its normal position and then cut the power to the coils. That's kind of a heavy-handed approach. Another would be to use the gaff bolt, if it's got it, to limit how much the machine allows the reflex to step up. is a built-in adjustment that prevents the stepping, not a drilled modification. But here's my take on the Reflex, and here's what I like about it. It provides yet another dimension to bingo gameplay for me I prefer to have mine operating as it came to me So I do have a couple extra reflex gears but I have not swapped them in because I like to have the machines running as they were when they were en route, preferably, just with all the features repaired if they've been cut. But as far as the reflex goes, I prefer to have that working as it came to me. So that means whatever the ratio of step up to step down, I leave it alone. I just make sure that the reflex is actually working, and it's stepping up appropriately when you win, and it's stepping down appropriately when you coin, and then I'm good. so I should mention when I say coin I mean either physically putting a coin in the machine or actually playing credits that you've won you don't have to put in money in order to make the machine step it down you're just playing money but if you were to turn the machine off and back on which would be if you got paid out, then the reflex would remain at whatever position it was at. Having the replay reset run does not step down the reflex unit. So, another interesting thing to note about reflex units is some games have more than one. Depending on the features involved and the way that those features paid out in credits, There may be a secondary reflex unit, which controls the overall tightness of the game in combination with the other reflex unit. It's pretty fascinating how they thought of this back in the 40s. so to leave you for tonight I thought I would discuss how the Duran Duran song The Reflex actually has a lot in common with the Reflex units found in these bingos and the horse race games the last verse is oh the Reflex what a game He's hiding all the cards. The reflex is in charge of finding treasure in the dark. And watching over Lucky Clover isn't that bizarre. Every little thing the reflex does leaves you answered with a question mark. Fairly interesting. Gives a whole new meaning to that song, doesn't it? Well, thank you again for listening. My name again is Nick Baldrige. You can reach me at foramusementonlypodcast at gmail.com. And you can listen to us on iTunes, Stitcher, Pocket Casts via RSS, on Facebook at For Amusement Only Podcast, on Twitter at Bingo Podcast, and on our website, which is foramusementonly.libsyn.com. Thanks very much for listening, and I'll talk to you next time.