Coin Slot
Issue: 1981 July 077 - Page 36
Coin Slot Magazine - #077 - 1981 - July [International Arcade Museum]
RESTORATION AND REPAIRS
Jennings Escalators
Continued from page 35
worn or missing. To repair, use a #29 drill and make a
D.
Magnet (V-4-177) — move magnet to the upper
hole in the exact location of the old pin, which you must
right as far as it will go and fix loosely with the brass
file flat if the surface is rough or part of the old pin
cover and screw. Insert coin and allow it to come to rest
remains. Tap this hole for 8-32 machine screw threads
and insert an 8-32 x %" machine screw until flush with
the bottom of the hole. Cut off the screw head and file
against the magnet. Slacken the brass fixing screw
until the remainder of the screw is identical in height to
proper operation.
the other pins — approximately 3/16". To prevent the
and move the magnet to the left until the coin drops
down the runway. Repeat several times to ensure
E.
Coin
butterfly (V-4-139) — this component is
new pin from unthreading, solder the pin on the top
gravity operated and when at rest the bottom leg
side where it passes through the steel cam plate.
should extend into the coin runway. When a coin is
When you are satisfied that all the parts are clean,
inserted the leg should swing freely out of the way and
polished, straightened, or otherwise made serviceable,
you may re-assemble the escalator by reversing your
disassembly procedure. Use new screws and fastners
throughout, as they can be had for only 2-3 cents each
retail, and obtain an assortment of cotler pins, since
most pins only bend once and nails make poor replace
ments. Components with adjustments are usually pin
ned — remove these with a pin punch to facilitate re
adjustment after final assembly.
You should encounter no problems until you are
ready to re-install the chain, which must be properly
allow the coin to rest at the bottom of the entry track.
timed and synchronized. Install the chain after all the
other parts except the face plate have been refitted.
Pass one end of the chain around the left-side chain-
wheel and pull the chain to the right across the back
face of the escalator. Note that the gap between the
tabs of the chain should be positioned so that a coin
rolling down the entry track can enter the gap freely.
There are only three possible positions of the chain on
the chainwheel. You may advance or retard the chain
Simultaneously, the upper leg of the butterfly should
move across the track in the little window provided,
preventing the entry of additional coins. Instead, such
coins should enter the reject track and be disgorged at
the bottom left of the escalator. If suqh rejected coins
stack up at the magnet, move the magnet further left
and repeat step D. Take care wh6n bending the
butterfly and check that the legs pass through the
windows without touching or binding.
You will observe that a large weight (V-4-516) mount
ed on the upper rear of the escalator (upper front on
older models) will push the butterfly into the reject
position when the escalator is tilted from the vertical.
Also, a series of spring operated linkages (V-4-155/156)
connected to the escalator operating arm (V-4-154)
serve to hold the butterfly in the reject position until
the operating arm is returned to the fully up position by
the escalator pull-down arm (V-4-664).
F. Coin detector and check detector arms (V-4-
by one tooth until the best alignment is achieved.
143/144) — these are the horizontal levers extending
Advance the chain until you can engage the teeth on
across the back of the escalator. Each arm has a pin (V-
4-149) which moves forward through the coin runway
to detect the presence of a coin. On both arms, the
proper adjustment is such that the pins are just a hair
below being flush with the rear face of the coin runway
when the arms are fully retracted. The pins are slotted
where they join the arms and can be positioned after
slackening their fixing screws.
G. Escalator pull down arm (V-4-664) — actually
connects the escalator to the rest of the mechanism
via the main operating arm (V-2-50). The top of the pull
down arm (V-4-153) is slotted for adjustment — slacken
the two fixing screws and move the end upwards to
ensure that the escalator operating arm has returned
the right-side chainwheel (V-17-10). Again, there are
three possible positions, the correct one allowing the
chainwheel ratchet to engage for a full stroke, then
fully return and re-engage. When proper synchroniza
tion has been obtained, install the master link with the
closed end of the clip facing in the direction of chain
travel. Note that the right-side chainwheel support
bracket (V-4-142) is slotted to allow for tension adjust
ment. Adjust to remove excessive slack but do not
make the chain taut or rough operation and binding
will ensue. After replacing the face plate and any other
remaining components the following adjustments can
be made.
A.
Roller detent (V-4-163/164) — this component
to the fully up position.
holds the left chainwheel in position after each stroke.
Most Jennings machines have a series of linkages
Adjust so that the gap in between the chain tabs is
(V-4-1589/90) connected to the finger release cam (V-
4-1293) which prevents the coin detector arm from
aligned with the coin entry track. Coins should roll
freely down the runway and come to rest between
tabs.
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B. Chainwheel limit arm (V-4-293) — the small
hook latches onto the left chainwheel pins and should
be adjusted to prevent rotation of the chainwheel past
the position established by the roller detent.
C. Stroke limit screw — located on the right edge of
the escalator. Loosen the locknut and turn the screw in
or out to prevent ratchet arm from pulling chainwheel
any further than the distance required for the roller
detent to advance one step.
© 36
The
International
—THE
COIN Arcade
SLOT Museum
fully retracting until the clock runs out. Proper adjust
ment of this linkage allows the coin detector arm to
fully retract and still have 1 /16" clearance between the
arm and the end of the linkage push-bar. The purpose
of this linkage is to prevent the player from pulling the
handle before the clock has completed its cycle.
Apply vaseline to all heavy wearing parts, such as the
chainwheel ratchet, roller detent, limit arm, and chain-
wheel axles and teeth. When properly lubricated and
adjusted your Jennings escalator will give trouble-free
service pull after pull.
http://www.arcade-museum.com/
July 1981
RESTORATION AND REPAIRS
Jennings Escalators
Continued from page 35
worn or missing. To repair, use a #29 drill and make a
D.
Magnet (V-4-177) — move magnet to the upper
hole in the exact location of the old pin, which you must
right as far as it will go and fix loosely with the brass
file flat if the surface is rough or part of the old pin
cover and screw. Insert coin and allow it to come to rest
remains. Tap this hole for 8-32 machine screw threads
and insert an 8-32 x %" machine screw until flush with
the bottom of the hole. Cut off the screw head and file
against the magnet. Slacken the brass fixing screw
until the remainder of the screw is identical in height to
proper operation.
the other pins — approximately 3/16". To prevent the
and move the magnet to the left until the coin drops
down the runway. Repeat several times to ensure
E.
Coin
butterfly (V-4-139) — this component is
new pin from unthreading, solder the pin on the top
gravity operated and when at rest the bottom leg
side where it passes through the steel cam plate.
should extend into the coin runway. When a coin is
When you are satisfied that all the parts are clean,
inserted the leg should swing freely out of the way and
polished, straightened, or otherwise made serviceable,
you may re-assemble the escalator by reversing your
disassembly procedure. Use new screws and fastners
throughout, as they can be had for only 2-3 cents each
retail, and obtain an assortment of cotler pins, since
most pins only bend once and nails make poor replace
ments. Components with adjustments are usually pin
ned — remove these with a pin punch to facilitate re
adjustment after final assembly.
You should encounter no problems until you are
ready to re-install the chain, which must be properly
allow the coin to rest at the bottom of the entry track.
timed and synchronized. Install the chain after all the
other parts except the face plate have been refitted.
Pass one end of the chain around the left-side chain-
wheel and pull the chain to the right across the back
face of the escalator. Note that the gap between the
tabs of the chain should be positioned so that a coin
rolling down the entry track can enter the gap freely.
There are only three possible positions of the chain on
the chainwheel. You may advance or retard the chain
Simultaneously, the upper leg of the butterfly should
move across the track in the little window provided,
preventing the entry of additional coins. Instead, such
coins should enter the reject track and be disgorged at
the bottom left of the escalator. If suqh rejected coins
stack up at the magnet, move the magnet further left
and repeat step D. Take care wh6n bending the
butterfly and check that the legs pass through the
windows without touching or binding.
You will observe that a large weight (V-4-516) mount
ed on the upper rear of the escalator (upper front on
older models) will push the butterfly into the reject
position when the escalator is tilted from the vertical.
Also, a series of spring operated linkages (V-4-155/156)
connected to the escalator operating arm (V-4-154)
serve to hold the butterfly in the reject position until
the operating arm is returned to the fully up position by
the escalator pull-down arm (V-4-664).
F. Coin detector and check detector arms (V-4-
by one tooth until the best alignment is achieved.
143/144) — these are the horizontal levers extending
Advance the chain until you can engage the teeth on
across the back of the escalator. Each arm has a pin (V-
4-149) which moves forward through the coin runway
to detect the presence of a coin. On both arms, the
proper adjustment is such that the pins are just a hair
below being flush with the rear face of the coin runway
when the arms are fully retracted. The pins are slotted
where they join the arms and can be positioned after
slackening their fixing screws.
G. Escalator pull down arm (V-4-664) — actually
connects the escalator to the rest of the mechanism
via the main operating arm (V-2-50). The top of the pull
down arm (V-4-153) is slotted for adjustment — slacken
the two fixing screws and move the end upwards to
ensure that the escalator operating arm has returned
the right-side chainwheel (V-17-10). Again, there are
three possible positions, the correct one allowing the
chainwheel ratchet to engage for a full stroke, then
fully return and re-engage. When proper synchroniza
tion has been obtained, install the master link with the
closed end of the clip facing in the direction of chain
travel. Note that the right-side chainwheel support
bracket (V-4-142) is slotted to allow for tension adjust
ment. Adjust to remove excessive slack but do not
make the chain taut or rough operation and binding
will ensue. After replacing the face plate and any other
remaining components the following adjustments can
be made.
A.
Roller detent (V-4-163/164) — this component
to the fully up position.
holds the left chainwheel in position after each stroke.
Most Jennings machines have a series of linkages
Adjust so that the gap in between the chain tabs is
(V-4-1589/90) connected to the finger release cam (V-
4-1293) which prevents the coin detector arm from
aligned with the coin entry track. Coins should roll
freely down the runway and come to rest between
tabs.
.com
m
:
u
from -muse
d
e
oad .arcade
l
n
Dow //www
:
http
B. Chainwheel limit arm (V-4-293) — the small
hook latches onto the left chainwheel pins and should
be adjusted to prevent rotation of the chainwheel past
the position established by the roller detent.
C. Stroke limit screw — located on the right edge of
the escalator. Loosen the locknut and turn the screw in
or out to prevent ratchet arm from pulling chainwheel
any further than the distance required for the roller
detent to advance one step.
© 36
The
International
—THE
COIN Arcade
SLOT Museum
fully retracting until the clock runs out. Proper adjust
ment of this linkage allows the coin detector arm to
fully retract and still have 1 /16" clearance between the
arm and the end of the linkage push-bar. The purpose
of this linkage is to prevent the player from pulling the
handle before the clock has completed its cycle.
Apply vaseline to all heavy wearing parts, such as the
chainwheel ratchet, roller detent, limit arm, and chain-
wheel axles and teeth. When properly lubricated and
adjusted your Jennings escalator will give trouble-free
service pull after pull.
http://www.arcade-museum.com/
July 1981
Future scanning projects are planned by the International Arcade Museum Library (IAML).