Mark Gibson is a person mentioned in 1 episode(s).
No aliases
No relationships
No facts recorded
Gottlieb score motor developed around 1947-1948, first appeared in Humpty Dumpty
Bally and Williams both initially used horizontal shaft horizontal cam designs similar to or copied from Gottlieb through 1950s-early 1960s
Royal Flush game uses point values that change for every step through the stepper, giving appearance of 'thinking' or computational complexity
Taught a course that Jeff attended; mentioned in context of Mark Gibson's courses; pinball community member with electromechanical expertise
EM pinball technician and educator; runs Fun with Pinball website and monthly free online repair clinics; conducted EM training at Pacific Pinball Museum and Past Times Arcade
Educational presenter on EM pinball scoring circuits; expert in electromechanical game design and operation
Instructor offering classes at Pacific Pinball Museum during Pinball Expo
EM pinball educator and presenter at Pintastic Pinball & Game Room Expo, demonstrating scoring mechanisms and circuits
Retired educator/enthusiast from Colorado who created and operates the 'Fun with Pinball' traveling educational exhibit
No contradictions detected
No linked glossary terms
Only one switch position in Gottlieb score motor uses a different switch dog placement than the standard; all others are uniform
Long Dwell cams in Williams games extend pulse width to provide tolerance for aged and worn switches
Starjet is a Gottlieb value game from 1963 that uses pancake-style horizontal cam motor
Mark Gibson's Fun with Pinball website provides detailed circuit breakdowns and repair resources beyond bonus circuits
EM devices use motion to perform computation, while solid-state games use motion primarily for ball control and toy activation
Score reels advance exactly one step per electrical pulse; scoring 50 points requires five sequential pulses from the score motor
Score reel advancement occurs only when solenoid coil power is cut and the spring relaxes, not while the switch is held closed
Lockin circuits use a second switch path to indefinitely maintain relay activation until a release switch opens the circuit
The distinctive five-pulse reset sound ('da da da do dot dot') heard in EM games is the audible signature of the score motor's cams firing pulses during reset
Every score reel has at least one, usually two, zero-position switches that control when the reset motor stops advancing that digit
Williams used a score motor design very similar to Valley's design
Gibson has published detailed animations and device explanations on his website covering EM mechanisms
Electromechanical devices require motion to perform computation, unlike solid-state games where motion is primarily for toy activation
Score reels advance only when coil power is cut and the spring pulls the plunger back, not when the switch is closed
Lock-in circuits use two parallel paths: activation and maintenance, keeping a relay active until a release switch opens
The score motor runs through 180-degree cycles and fires pulses from cams; some cams fire once per half rotation, others fire five times
The characteristic reset sound in EM games is the five pulses from the score motor's cam firing five times per 180-degree rotation
Score reels have at least one, usually two zero-position switches that open when the reel reaches zero to stop the reset motor
Harry Williams used a very similar score motor design to Bally's design
Carry logic in scoring allows a 10-point reel to advance when a 1-point reel reaches position nine and advances to zero
Mark Gibson has been creating and traveling with the Fun with Pinball exhibit for five years
Mark Gibson is from Colorado
The baseball game custom build took months to complete, with rule design being the most time-consuming aspect