# Episode 148 - Mushroom Bumpers **Source:** For Amusement Only EM and Bingo Pinball Podcast **Type:** podcast_episode **Published:** 2015-08-06 **Duration:** 6m 8s **Beat:** Pinball **URL:** https://foramusementonly.libsyn.com/episode-148-mushroom-bumpers --- ## Analysis Nicholas Backbone provides a detailed technical and historical overview of mushroom bumpers, a distinctive pinball playfield feature popularized by Bally from the 1960s through 1980s. He explains the mechanical construction (colored cap on plastic stem connected to a leaf switch underneath the playfield), function, maintenance challenges, and sourcing for replacement parts from Pinball Resource. The episode emphasizes that while mushroom bumpers are satisfying to hit when functioning properly, the caps are fragile and prone to breakage requiring regular maintenance. ### Key Claims - [HIGH] Harry Stoner invented mushroom bumpers in the 1930s and used them on a couple of games before Bally started using them again in the 1960s — _Nicholas Backbone, opening historical context for the episode_ - [HIGH] Bally really popularized mushroom bumpers' use and they appeared on many Bally machines from the 60s into the 80s — _Nicholas Backbone, establishing Bally's role in the feature's widespread adoption_ - [HIGH] Mushroom bumper caps are available in blue, green, red, black, white, and yellow from Pinball Resource — _Nicholas Backbone, providing sourcing information for replacement parts_ - [HIGH] Mushroom bumper caps break quite easily when struck by the ball with force, particularly in some games — _Nicholas Backbone, describing maintenance challenges and breakage issues_ - [HIGH] Repro caps from Pinball Resource come with a new clip, but sometimes the clip doesn't fit properly and can fall off, stopping the bumper from scoring — _Nicholas Backbone, providing practical troubleshooting and maintenance advice_ ### Notable Quotes > "The mushroom bumper is so-called because it has a cap, which is brightly colored, which sits on top of a plastic stem, which is visible to the player." > — **Nicholas Backbone**, early in episode > _Clear definition of the mushroom bumper component and naming convention_ > "Invariably though, hitting a mushroom bumper is satisfying. The only time that it's not is when the bumper cap is broken." > — **Nicholas Backbone**, mid-episode > _Summarizes the player experience and highlights the maintenance problem as the primary detractor_ > "The ball strikes it with a lot of force in some games, and it'll just snap." > — **Nicholas Backbone**, mid-episode > _Explains the physical cause of cap breakage due to ball impact force_ > "You'll want to save your previous clip, if you can, for your game and test it out with the new clip." > — **Nicholas Backbone**, later in episode > _Practical maintenance recommendation for operators and collectors dealing with replacement caps_ ### Entities | Name | Type | Context | |------|------|---------| | Nicholas Backbone | person | Host and producer of For Amusement Only EM and Bingo Pinball Podcast; presents technical and historical expertise on vintage pinball mechanics | | Harry Stoner | person | Historical pinball inventor credited with inventing mushroom bumpers in the 1930s and using them on early games | | Bally | company | Major pinball manufacturer that popularized mushroom bumper use from the 1960s through 1980s on numerous machines | | Pinball Resource | company | Aftermarket parts supplier offering replacement mushroom bumper caps in multiple colors and printed variations | | For Amusement Only | organization | EM and Bingo Pinball Podcast focused on vintage and electromechanical pinball history and mechanics | ### Topics - **Primary:** Mushroom bumper mechanics and design, Bally innovations in flipper pinball, Vintage pinball component maintenance and repair - **Secondary:** Pinball history and component evolution (1930s-1980s), Replacement parts sourcing for EM pinball machines ### Sentiment **Neutral** (0) — Episode is educational and technical in tone. Nicholas Backbone presents factual information without strong emotional valence. Slight positive sentiment when describing the satisfying feel of hitting a functioning mushroom bumper, balanced by matter-of-fact discussion of maintenance problems. ### Signals - **[community_signal]** For Amusement Only podcast continues educational series on Bally innovations, building knowledge base within EM and vintage pinball collector community (confidence: high) — Nicholas Backbone explicitly states 'Continuing our series on Bally innovations in flipper pinball' and announces future episodes on games featuring mushroom bumpers - **[design_philosophy]** Nicholas Backbone demonstrates detailed technical knowledge of playfield mechanics and component design philosophy in vintage Bally machines, presenting mushroom bumpers as a deliberate design innovation that became a signature feature across their product line (confidence: high) — Extended technical explanation of mushroom bumper construction, function, and widespread adoption across Bally's 1960s-1980s catalog --- ## Transcript 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. Continuing in our series on ballet innovations in flipper pinball, I wanted to spend a moment and talk about the mushroom bumper. Now, some of you may be upset and say, wait a minute, Nick, didn't Stoner invent those in the 1930s? And I'd say, yes, in fact, they did. They used it on a couple of games in the 30s, and then Bally started using them again in the 1960s. But it was Bally who really popularized their use. and they appeared on many, many, many Valley machines from the 60s and into the 80s. The mushroom bumper is so-called because it's got a cap, which is brightly colored, which sits on top of a plastic stem, which is visible to the player. the cap is round and it can be in a variety of colors and the stem that it sits on is actually just a black very small bumper body type thing But it's not like a pop bumper. It's just this... How to describe it? It's almost like an oval, kind of, and it extends from where the cap normally rests down to the playfield. Underneath the playfield, the cap has a stem that drives all the way through that body under the playfield. From there, it hooks onto a switch, just a normal leaf switch, like a rollover, and there's a little clip that holds it in place. Now, when the ball strikes the bumper body, what actually happens is it raises the cap, and the cap will either open or close a switch underneath the playfield, that leaf switch. And then the game will do whatever it needs to do. In some cases it light special in some cases it start some kind of special feature And in other cases it score points Invariably though hitting a mushroom bumper is satisfying The only time that it's not is when the bumper cap is broken. And as you can imagine, this happens quite easily. You have to make sure that that cap is maintained. Otherwise, it's going to break. The ball strikes it with a lot of force in some games, and it'll just snap. So, replacements are available for blue, green, red, white, and yellow from Pinball Resource. Now on these repro caps, they come with a new clip. However, sometimes the clip doesn't fit just right in a game and it'll start falling off, which means that the cap comes unhooked from the switch and it stops scoring. So you'll want to save your previous clip, if you can, for your game and test it out with the new clip. But if your game happens to need something slightly different something slightly tighter then you want to have that old clip on hand if you can Now Pinball Resource also has a variety of mushroom bumper caps that are printed with different graphics on top. And some of them were printed with point values, and those come in various colors as well. So if you need one, that would be the first place to check. In a future episode, we'll be talking about some of my favorite games that use mushroom bumpers, but many of the games that Bally made in the 1960s and 70s had this as a notable feature so that's all for tonight thank you very much for joining me my name again is Nicholas Baldridge you can reach me at 4amusementonlypodcast.gmail.com or you can call me on the bingo line that's 724-BINGOS1 724-246-4671 You can listen to us on iTunes, Stitcher, Pocket Cast via RSS, on Facebook, on Twitter at Bingo Podcast You can follow me on Instagram at nbaldridge or you can listen to us on our website which is for amusement only dot libsyn dot com Thank you very much for listening and I'll talk to you next time _(Acquisition: groq_whisper, Enrichment: v3)_ --- *Exported from Journalist Tool on 2026-04-13 | Item ID: b4b8a5e9-beee-415f-ade5-a795ac9202e2*