Discussion:
Gottlieb gravity plunger relay
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integ194
2021-09-18 22:48:06 UTC
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Would appreciate if someone could let me know the typical function of the gravity plunger relay in Gottlieb early flipperless machines. I am restoring a 1946 GTB Superliner (unable to acquire schematic) and not been able to work out the role of this relay. Thanks Wayne
John Robertson
2021-09-18 23:32:39 UTC
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Post by integ194
Would appreciate if someone could let me know the typical function of the gravity plunger relay in Gottlieb early flipperless machines. I am restoring a 1946 GTB Superliner (unable to acquire schematic) and not been able to work out the role of this relay. Thanks Wayne
You have tried Steve Young at The Pinball Resource? I don't have that
schematic and am not familiar with that feature I'm afraid...

Otherwise (if you want to try) you wouldn't be the first person to draw
up a schematic of a game without one.

John :-#)#
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(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
integ194
2021-09-20 22:33:07 UTC
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Post by John Robertson
Would appreciate if someone could let me know the typical function of the gravity plunger relay in Gottlieb early flipperless machines. I am restoring a 1946 GTB Superliner (unable to acquire schematic) and not been able to work out the role of this relay. Thanks Wayne
You have tried Steve Young at The Pinball Resource? I don't have that
schematic and am not familiar with that feature I'm afraid...
Otherwise (if you want to try) you wouldn't be the first person to draw
up a schematic of a game without one.
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
Thanks John. PBR do not have the schematic.
Terry Cumming
2021-09-21 15:27:58 UTC
Permalink
Would appreciate if someone could let me know the typical function of the gravity plunger relay in Gottlieb early flipperless machines. I am restoring a 1946 GTB Superliner (unable to acquire schematic) and not been able to work out the role of this relay. Thanks Wayne
Maybe you mean the "slo-drop" delay unit? From my notes it provides timing functions. Later this was handled by the control motor. The time it takes to actuate coincides with the time it takes some other coil to fire for example. The slo-drop switches would be tied in with the other coil. Think in terms of the motor switches on later EMs that pulse in order to control some other coils.

Terry
John Robertson
2021-09-21 19:34:16 UTC
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Post by Terry Cumming
Would appreciate if someone could let me know the typical function of the gravity plunger relay in Gottlieb early flipperless machines. I am restoring a 1946 GTB Superliner (unable to acquire schematic) and not been able to work out the role of this relay. Thanks Wayne
Maybe you mean the "slo-drop" delay unit? From my notes it provides timing functions. Later this was handled by the control motor. The time it takes to actuate coincides with the time it takes some other coil to fire for example. The slo-drop switches would be tied in with the other coil. Think in terms of the motor switches on later EMs that pulse in order to control some other coils.
Terry
Does that use an air shock absorber like some other 30s and 40s games? I
find they usually need to be rebuilt with a fresh greased leather washer
to restore the proper action.

John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
Wayne Ruckley
2021-09-21 22:40:04 UTC
Permalink
Post by John Robertson
Post by Terry Cumming
Would appreciate if someone could let me know the typical function of the gravity plunger relay in Gottlieb early flipperless machines. I am restoring a 1946 GTB Superliner (unable to acquire schematic) and not been able to work out the role of this relay. Thanks Wayne
Maybe you mean the "slo-drop" delay unit? From my notes it provides timing functions. Later this was handled by the control motor. The time it takes to actuate coincides with the time it takes some other coil to fire for example. The slo-drop switches would be tied in with the other coil. Think in terms of the motor switches on later EMs that pulse in order to control some other coils.
Terry
Does that use an air shock absorber like some other 30s and 40s games? I
find they usually need to be rebuilt with a fresh greased leather washer
to restore the proper action.
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
The machine John has a damper at the base of the reset/coin slide mechanism to pump the slide return and it is working fine. I have found similar dampers on many trade stimulators of the era. Rgds Wayne
John Robertson
2021-09-22 00:02:36 UTC
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Post by Wayne Ruckley
Post by John Robertson
Post by Terry Cumming
Would appreciate if someone could let me know the typical function of the gravity plunger relay in Gottlieb early flipperless machines. I am restoring a 1946 GTB Superliner (unable to acquire schematic) and not been able to work out the role of this relay. Thanks Wayne
Maybe you mean the "slo-drop" delay unit? From my notes it provides timing functions. Later this was handled by the control motor. The time it takes to actuate coincides with the time it takes some other coil to fire for example. The slo-drop switches would be tied in with the other coil. Think in terms of the motor switches on later EMs that pulse in order to control some other coils.
Terry
Does that use an air shock absorber like some other 30s and 40s games? I
find they usually need to be rebuilt with a fresh greased leather washer
to restore the proper action.
John :-#)#
The machine John has a damper at the base of the reset/coin slide mechanism to pump the slide return and it is working fine. I have found similar dampers on many trade stimulators of the era. Rgds Wayne
May I suggest you take some photos of the mechanics of the game and send
off to IPDB.org? Some of these assemblies are quite interesting!

John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
Wayne Ruckley
2021-09-21 22:37:08 UTC
Permalink
Post by Terry Cumming
Would appreciate if someone could let me know the typical function of the gravity plunger relay in Gottlieb early flipperless machines. I am restoring a 1946 GTB Superliner (unable to acquire schematic) and not been able to work out the role of this relay. Thanks Wayne
Maybe you mean the "slo-drop" delay unit? From my notes it provides timing functions. Later this was handled by the control motor. The time it takes to actuate coincides with the time it takes some other coil to fire for example. The slo-drop switches would be tied in with the other coil. Think in terms of the motor switches on later EMs that pulse in order to control some other coils.
Terry
Thanks Terry thats' very helpful info. Rgds Wayne
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