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Патент USA US2410708

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NOV- 5» 1946-
R. H. BREITHER ETAL
2,410,708
VARIABLE STROKE MECHANISM
Filed July 18, 1941
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R. H. BREiTHER ETAL
2,410,708
VARIABLE STROKE MECHANISM
Filed July 18, 1941
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Nov. 5, 1946.
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R- H. RRERRER Rm
2,410,708
VARIABLE S TROKE MECHANI SM
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2,410,708
Patented Nov. 5, 1946
UNITED STATES PATENT 4OFFICE
2,410,708
VARIABLE STROKE MECHANISM
Robert H. Breither, Herman L. Selden, Charles
,K T. Breitenstein, and Frank G. Nicolaus, Chi
cago, Ill., assignors to Raymond T. Maloney,
Chicago, Ill.
Application July 18, 1941, Serial No. 403,002
9 Claims.
(Cl. 'I4-142)
1
2
This invention pertains broadly lto mechani
cal movements and more particularly to step by
trolled by a ball-controlled value switch, such
that the score value may be controlled variously
in playing the game by the value switch.
step ratchet advancing means such as may be
used -with various kinds of indicating or contro
A further object is to provide an automatic
5 lock for a score ratchet mechanism, such that
during movements of the score device from an
A principal object of the invention is provision
advanced to a zero position, various operating
of a variable stroke step up mechanism especially
pawls are held ineffective either until the ratchet
suited for use with score indicators and the like
device reaches zero, or until the ratchet device
in connection with amusement and game appa
ratus including a score indicator operated in a 10 is first steppedaway from zero.
apparatus, for amusement devices.
`
relatively step by step fashion by means such as
a pawl and ratchet mechanism.
Other advantages, novel aspects and features
of improvement in the invention relate to details
of construction as well as the mode of operation
More particularly stated it is an important
and cooperative relationship of the component
object of the invention to provide an electrically
operated stroke limiting device moved into a plu 15 parts of the preferred illustrative embodiment
shown in the appended drawings in which:
rality of positions with respect to a driving pawl
Fig. l is a perspective' view of a complete vari
or a ratchet advancing mechanism whereby the
able stroke and step by step indicator combina
stroke of the pawl may be predetermined be
tween minimum and maximum limits.
tion; .
Fig. 2 is a fragmentary elevation of the device
A further important object of the invention is
of Fig. 1 showing the parts in a, certain operated
to provide a yieldable driving connection between
position;
’
the pawl and the actuating means therefor
Fig. 3 is a fragmentary elevation of the device
whereby said actuating means may operate in a
of Fig. 1 with the parts in a diiferent operating
full stroke or full power range notwithstanding
position;
-the fact that the pawl driven thereby may be
Fig. 4 is a fragmentary elevation of the device
limited in its movement by the aforesaid selec
of Fig. 1, modified to include additional safety
tively operable stroke limiting means.
features and illustrating the reset position of
Still more specifically stated, it 1s an object of
certain parts.
the invention to provide in combination an indi
cator adapted to be moved a maximum amount 30 Fig. 5 is a fragmentary perspective of the ad
ditional safety pawl structure;
by a driving pawl or the like, an electrical device
» Fig. 6 is a, top plan fragment of the showing
to move the pawl in its full driving-stroke, and
of Fig. 5, vomitting the ratchet disc of the latter
a variable stroke device movable into various
positions with respect to the pawl to permit or
view.
prevent maximum movement or stroke'of the 35 Fig. 7 is a circuit diagram.
As viewed in Fig. 1 there is provided a step by
pawl, as desired, whereby the movement of the
step indicating unit including an upright mount
indicator may Vbe selectively controlled.
ing plate I0 upon which is journaled a horizon
« It is a further object of the invention to pro
tal shaft Il to which is affixed a ratchet disc I2
vide as the driving means for the aforesaid pawl,
an electromagnetic solenoid and a yieldable driv 40 rotating in a plane parallel with the plate. On
an opposite side of the plate is an indicating
-ing connection between the pawl and the sole
member in the form of a disc I3 upon which are
noid whereby the plunger of the solenoid may be
a plurality of indicia characters I4, the disc be
moved through its full range or stroke notwith
ing ñxed on shaft Il for- rotation therewith.
standing the fact that the pawl may be limited
to less than its full stroke by the variable stroke 45 Means for moving the indicating disc in a step
by step fashion include a main driving lever I6
device, one of the purposes of this arrangement
pivoted on plate I0 by means of pivot l1. At the
being to maintain and permit full stroke move
upper end of lever I6 is a ratchet pawl I8 having
ment of the solenoid plunger for purposes of
an offset nose I9 (Figs. 2 and 3 also) adapted
maximum operating eiliciency.
'
It is also an object to provide in combination 50 to engage in the teeth |2a of ratchet disc l2
when lever I6 is pivoted in a clockwise direction,
with a ball playing game an electro-magnetically
and adapted to drag ineffectively over the teeth
controlled score device and means controlled by
|2a when lever I6 is pivoted reversely in an anti
a ball switch for actuating the same, together
with an electro-magnetically controlled stroke
clockwise direction.
varying device for the score device and also con 55 Driving lever i6 is urged into a normal posi
3
2,410,708
tion by means of a large spring 20 having one
end 20a attached to 8 Pin on an offset Ita on
the pawl Il so as to have the dual effect of piv
oting pawl Il in a clockwise direction to urge
the nose I9 thereof into positive engagement with
the teeth I2a, and as well to urge lever IB in a
clockwise direction, such movement of the main
4
the reset pawl l0 in a clockwise direction, the
safety pawl 45 moves toward the right in a nearly
linear displacement to withdraw the stop nose
45a thereof from above the nose I9 on the driv
ing pawl thereby permitting the latter to be
raised from engagement with teeth I2a. The
location of the pivot 30X with respect to the
lever i6 being limited by an adjustable stop
other reference points of movement of the parts
screw 2I mounted in a bracket 22 on plate III
concerned, permits the aforesaid linear move
and having an end adapted to bear against an 10 ment.
oil’set lio at the bottom of lever IB.
The primary purpose of the safety pawl It
The ratchet disc I2 is normally urged into ay
and associated parts is that of preventing the
starting position by a coil spring 23 having one
driving pawl I8 from being thrown upwardly out
end 22a tixed to shaft Il by a cotter pin 24 which
of engagement with the teeth |2a when the driv
also retains the suing on shaft II, the opposite 15 ing pawl reaches the end of its advancing stroke.
end 28h o1' the spring bearing against the pivot
If it were not for the blocking effect of the safety
pin Il forondrivinslever IB.
nose 15a, momentum imparted to the disc I2 and
As the ratchet disc I2 is advanced in a clock
associated parts by driving action of pawl I8
wise direction by driving means presently to be
would ‘be suilicient in most instances to cause
described, spring I2 is tensioned in an eifort to 20 the nose portion I9 on the driving pawl to be
restore the disc to its starting position, however,
cammed upwardly so that the disc would advance
such return or retrograde movement of the disc
one or more teeth beyond the position into which
is prevented by a releasable stop pawl 30 pivoted
it would ordinarily advance but for such cam
on plate III as at II and having a nose portion
ming action. Sometimes it is possible by pound
lla (see Figs. 2 and 3 also) disposed opposite the
ing or abruptly moving the device upon which
nose I9 of the driving pawl and engaging in teeth
the plate II) is mounted, as in a game apparatus
Ila normally to prevent such retrograde move
or the like, that such camming of the driving
ment. The stop pawl 30 is normally urged by
pawl may be deliberately and fraudulently ei
spring 20 to dispose nose 30a thereof in engage
fected to achieve a higher score or indication than
ment with teeth I2a, this being accomplished by 30 would otherwise be possible. Safety means 4I
attaching the opposite end 20D or the spring 20
prevents such camming of the driving pawl in
to a pin 32 on an oil'set 30h oi' the stop pawl.
the manner described.
By pivoting the stop pawl 30 in a clockwise di
Means for oscillating or actuating the driving
rection the nose 3io thereof is withdrawn from
lever I6 includes a driving solenoid 50 having a
teeth I2a and if the driving pawl I8 is similarly
plunger 5I pivotally connected as at 52 to the
raised from the teeth, the' disc I2 may rotate in
lower end of a dog-leg lever 53, which is pivoted
an anti-clockwise direction back fto starting po
as at 54 on lever I6. Spring means 55 is attached
sition, which position is determined by a iixed
at one end to a pin 56 at the bend or bight of the
stop pin Il on the back side of plate I0 and which
dog-leg lever, while the opposite end of the spring
is adapted to engage a stopping pin 3l on disc I 2. 40 is attached to a pin 5l on lever I6 to urge the dog
The stop pawl may be withdrawn from latch
leg lever in a clockwise direction to a normal
ing or stopping Doeltion by action of an electro
position determined by the oil'set I 6a on lever Il.
magnetic solenoid Il having its plunger II piv
The dog-leg spring 55 is of sufficient strength
otally connected is at l2 to a second offset arm
normally to prevent pivotal movement of the dog
“c on the stop pawl 3l, a pin I3 limiting move
leg lever when the plunger 5I is attracted toward
ment of plunger 4I, and hence a pawl l0 in an
the right by energization of solenoid 50. How
anti-clockwise direction.
ever, should the lever IIi be restrained against
As will be described in detail hereinafter, en
pivotal movement, the spring 55 would permit
ergizatio'n of the reset solenoid 4I! rocks the stop
the dog-leg lever to break away or pivot at M
pawl Il to removed nose 30a thereof from teeth a, so that the plunger 5I could make its normal lull
I2a; however in order to permit, the disc I2 to
stroke into the bore of solenoid 5I).
return to starting position, it is also necessary
The foregoing breakaway4 feature of the con
to raise the driving pawl I8, and to this end the
nection between the driving lever IB and the
oi‘lset portion )la of the stop pawl is provided
driving solenoid 5I! is important in connection
with an additional otl'set finger 30d which un
with the variable stroke mechanism presently to
derlleß ß linger lla on the oilset nose I9 of the
be described, it being understood moreover that
driving pawl soV as to raise the latter when
it is desirable for purposes of eillciency to permit
finger lld raisœ responsive to a clockwise or re
the plunger 5| to make its full stroke for the
leasing movement of the pawl 30 upon energiza
reason that the electromagnetic eiliciency oi the
«tion of solenoid Il. Thus the disc I2 is free for GO solenoid, and more particularly the pull on the
rotation by spring 2l to a starting position.
plunger 5I, increases up to a certain point as the
In order to assure positively accurate dis
plunger 5I is drawn into the borel of the solenoid
placement of the disc I2 in the advancing di
winding. This arrangement also increases the
rection, and to prevent fraudulent operation of
mechanical efficiency of the pawl and ratchet
such a device where it is used in connection with
driving means and assures positive action of the
a score indicator or the like, there is provided a 65 latter.
safety pawl I5 pivoted as at 30X on the offset
In its normal operating stroke the lever Il
Ißb of the stop pawl, this safety pawl having an
draws` the driving pawl I8 backward (toward the
offset nose 45a which overlies the offset I9 on
left) a plurality of teeth, say four, so that on
the driving pawl Il when in normal position, thus 70 the advancing stroke (toward the right of pawl
limiting the vertical displacement possible to the
I8) the disc I2 Will be rotated a distance corre
pawl Il when in said normal position. A slot
sponding to four of the teeth I 2a.
Il receives a slot pin l1 upon which finger 45h
In order to selectively control the distance or
of the safety pawl rests in normal position.
displacement through which the ratchet disc I2
When the reset solenoid 40 is energized to pivot 75 may move at a given time, there is provided a
2,410,708
5
6
means for limiting the stroke of the driving mech
anism, particularly the lever I6, to an amount
equivalently less than the predetermined number
a stop pawl 99- pivoted on pin means 9| on plate
69 and having an offset stopping nose 92 engage
able in teeth 63a beneath an offset 99a on pawl
19. The stop pawl 99 has an arm 99a drlvingly
connected as at 93 with a solenoid plunger 94 of
the selecting solenoid 95. A spring 96 coiled
around the pin 9| has one of its ends 96a held
against a stop pin 91 for a plunger 94, while its
opposite end 96h engages the pawl 99 eccentricaily
of its pivotal axis and urges the pawl in a clock
of teeth, in this instance four.
Variable stroke means include a mounting plate
69 which may desirably be attached as at 6I to
the plate I0, there being a shaft 62 journaled on
plate 69 and carrying a variable stroke disc 63
which is normally urged in an anti-clockwise
direction by a coil spring 64 having one end 65
fixed to the shaft 62 by means of a cotter pin 66,
wise direction so as to dispose the stopping nose
while the opposite end 61 of the spring bears
92 thereof in teeth 63a.
against a pin 68 on an advancing lever 69 piv
Thus when the driving lever 69 is actuated by
otally mounted on the pin 68 which extends
energization of solenoid 15 as aforesaid, the nose
through the lever and is fixed on plate 69.
15 92 on the stopping pawl rides in teeth 63a and
Stopping formations are placed at various
prevents retrograde or anti-clockwise movement
radial distances from the center of rotation of
of the disc 63.
disc 63 for engagement with the driving lever
Means for selectively effecting anti-clockwise
I6 to limit the stroke thereof. These movement
movement 0f the variable stroke disc, includes the
limiting formations are preferably in theform 20 selecting solenoid 95 and its connections with the
of relatively offset surfaces or edge portions 19,
stop pawl 99 such that upon energization of the
19a, 19h, and 19e, each of which is at a succes
solenoid 95 nose 92 of the stop pawl 99 is raised
sively lesser radial distance from the first edge
from engagement with the disc teeth 63a, nose
portion 19, than its predecessor.
92 also engaging the finger 99a on the driving
By rotative movement of the variable stroke 25 pawl 19 to raise the latter and particularly the
plate 63 under control of mechanism hereinafter
offset noseportion 99 thereof free of teeth 63a
to be described, the relatively offset stop or lim
so that the disc 63 may rotate in an anti-clock
iting edges 19, 19o etc. may be positioned selec
wise direction a distance determined by the length
tively opposite the path of movement of an offset
of time the stop pawl 99 is pivoted into withdrawn
arm |6b on the main driving lever I6 of the 30 position by energization of solenoid 95.
step up unit. The stopping offset 19o which is
at the least radial distance from the center of
rotation of disc 63 will permit the greatest piv
A sufficient clearancels allowed between the
nose 92 of the stopping pawl and the offset 69a
on the driving pawl 19 to permit of intermittent
operations of solenoid plunger 94 sufllcient to as
otal movement of lever I6 in an anti-clockwise
direction, whereas the first stop edge or means 35 sure movement of disc 63 of one tooth at a time.
19 when positioned in the path of the offset I6b,
will permit the least pivotal movement of lever I6.
It will be apparent that the number of the stop
ping formations or edge portions 19, 19a, etc. may
The aforesaid clearance requires that plunger 94
92 on the pawl 19 and at its opposite end on the
pivot pin 68 for lever 69 with the effect of pivot
ing the pawl 19 in a clockwise direction to nor
mally dispose the offset nose portion 89 thereof
in the teeth 63a of the variable stroke disc.
Lever 69 is disposed in its normal position of
Fig. 1 by action of a spring 63 anchored at one
end on a pin 84 on mounting plate 69 and at lts
opposite end on a pin 85-at the upper end of lever
69 thus urging the latter in a clockwise direction
and thus withdrawing the solenoid plunger 16
into its outer normal position as shown in Fig. 1.
Each time solenoid 15 is energized lever 69
pivots in -an anti-clockwise direction to draw the
driving pawl 19 toward the left so that the nose
portion 99 thereof may engage with the last tooth
63a in an anti-clockwise direction, and upon de
energization of solenoid 15 the action of spring
83 in restoring lever 69 in a clockwise direction
will cause the pawl 19 to urge the variable stroke
disc 63 in a clockwise direction, thus tensioning
of the main stepping unit is the same as hereto
go almost to the end of the stroke before the
offset 69a is engaged and raised; thus when sole
noid 95 is de-energized, offset 89a will drop back
40 very quickly by action of spring 8| and re-engage
be multiplied as desired.
In order to selectively position the disc 63 for
in teeth 63a, since 99a is not raised as far from
the purpose aforesaid there is provided driving
teeth 63a as nose 92. Or if desired. solenoid 94
means in the form of an advancing solenoid 15
may be held .in attracted position by continued
having a plunger 16 pivotally connected as at 11
energization of coil 95 a time sufficient to permit
to the lower end of lever 69 to pivot the latter
disc 63 to rotate clockwise to the limit of 'its move
in anti-'clockwise direction when the solenoid 15 . ment, which limit is determined by offset projec
is energized.
tions 63h on disc 63 disposed to strike against
Mounted pivotally as at 18 at the upper part`
ears 69a on plate 69 for this purpose.
of lever 69 isan advancing pawl >'19 having an
An additional safety feature is shown in the
offset 89 disposed to engage in teeth 63a, in disc 50 modification of Fig. 4 and the explanatory detail
63. A spring 8| is anchored at one end on pin
views of Figs. 5 and 6. In Fig. 4 the construction
fore described with the exception that there is
an added safety pawl |99 pivoted on plate I9 as
55 at I9| and having an offset finger |92 projected
by clockwise movement of the pawl underneath
offset nose portion 39a of the reset pawl to hold
the latter in elevated or withdrawn position along
with driving pawl I8 so that there will be no
60 interference with the return movement of the
ratchet disc I2 by its spring 23. In this sense
the safety pawl | 99 constitutes a locking device
adapted to maintain both the driving and reset
65
pawls in ineffective position until the indicating
dial, and hence the associated ratchet disc I2, is
restored to normal position, release of the lock
ing pawl being effected by engagement of »pin
means |93 with the edge of pawl |99 to move the
70 latter in anti-clockwise direction against the ten
sion of its spring |94, which spring normally
urges the pawl in a clockwise direction to thrust
the locking nose |92 thereof into blocking posi
tion beneath the other pawls as aforesaid.
Means for preventing retrograde movement of
vthe variable stroke disc includes the provision of 75 The relationship of the blocking pawls to the
its spring 64.
`
7
2,410,708
advancing and reset pawls is further clarified in
Figs. 5 and 6.
Summary of operation
dog-leg or break-away arm 53 is pivoted out of
its normal position against the yieldable con
nection. or spring 55.
Assuming a further play of the game apparatus
In Fig. 7 there is shown a schematic arrange
wherein another ball |20 engages and closes a.
ment of the parts including a circuit diagram, 5 switch
| 2| to complete a circuit via ‘conductor
which is intended only by way of example to
|22
to
the
driving solenoid 15 for the variable
illustrate one arrangement for actuating the in
stroke driving lever B9, this would cause move
dicating mechanism. In this diagram it will be
ment of the plunger 16 (Figs. i or 3, also) to
observed that a source of power has been indi 10 wards the right pivoting the lever 69 in an anti
cated by the conventional representation of a
clockwise direction and causing a pawl 19 to slip
battery B one side of which is connected to a
ineffectively back toward the left over the teeth
common return or ground G4'. It is to be under
63a on the variable stroke disc until the plunger
stood that any suitable source oi' power may be
16 had reached the limit of its attracted move
utilized in such exemplary circuit arrangement. 15 ment, whereupon the spring 83 (assuming then
Assuming that the indicator dial I3 has been
solenoid ‘I5 to be deenergized as by opening of
left in an advanced position, and that the indi
switch |2I) would again urge the lever 59 in a
cating unit is associated with a ball playing form
clockwise direction with the nose 80 of driving
of game apparatus, another player may approach
pawl 19 caught in the teeth 63a to rotate the disc
the apparatus and close a switch |I0 completing
63 in a clockwise direction until the stop forma
a circuit via conductor II| to the reset solenoid
tion or notch 10c of least radius, and hence
40 thereby energizing the latter to rock the reset
greatest permissible stroke, is rocked into posi
pawl 30 to the position shown in Fig. 4 with the
tion opposite the stopping offset IBD and the main
nose portion 30a thereof withdrawn from the
driving lever I6 of the step unit as shown in Fig.
teeth |2a of the ratchet disc I2. Finger 30d on 25 3. This would correspond to a, high score combi
the reset pawl will also be elevated engaging the
nation so that the next time a ball |I5 were to
underside of the nose portion or oiïset ISa on the
close switch IIB, the score disc would be stepped
driving pawl I8 and raising the latter from en
a maximum amount, for example the distance
gagement with |2a, thus freeing the disc I2 for
of four teeth.
anti-clockwise movement under urgence of its 30
If in the foregoing situation, another ball |25
spring 23 back to a starting position which will be
were to engage and close a switch |26, circuit
determined by an engagement of the stop pin
would Ibe closed from the solenoid 95 to raise the
|03 with the edge of the safety or locking pawl
reset arm 90 and the driving pawl 19 from teeth
|00 when the latter moves to the limit of its anti
63a permitting an amount of anti-clockwise
clockwise range of movement determined by an 35 movement of disc 63 for a length of time depend
ear |05 on plate I0.
‘
ing upon how long the switch |26 remains closed.
In the embodiment of Figs. 1 and 2, for ex
If desired the ball |25 may be arranged to tran
ample, the limit of such return movement of the
siently engage switch |26 thereby closing it only
ratchet disc I2 would be determined by engage
momentarily, in which event the disc G3 would
ment of the stop pin 34 with stationary stop pin 40 have time to move under urgence of spring 54 a
33 on plate I0.
In the foregoing resetting operation of the ern
bodiment of Fig. 4, it will be observedrthat the
locking nose |02 on the locking pawl is urged be
neath the reset pawl, but will be automatically
withdrawn when disc |2 is reset.
Referring again to Fig. '7, the reset or selecting
solenoid 85 for the variable stroke unit may be
simultaneously energized with reset coil 40 pro-`
vided a switch I I2 is moved into engagement with
contact ||3 to complete an energizing circuit via
distance of only one of the teeth 63a, thus pre
senting the stop formation or notch 10b opposite
the stop formation IEb on the main driving lever.
Another such momentary closing of switch |26
would permit another short movement of the disc
63 to present the next stop formation 10o in stop
ping position, and so on.
The foregoing illustrative arrangement of Fig. 7
is merely exemplary of one successfully employed
60 embodiment, and it will be appreciated that other
arrangements may be utilized and are contem
conductor Ill from solenoid 95 through switch
plated. Apart from the novel combination oi ball
III) to ground. In such an event (referring to
switches to control means for varying the stroke
Fig. 1) plunger 94 of solenoid 95 would be at
on a stroke-operated score device, importance at
tracted downwardly rocking arm 90 so as to raise 55 taches to the more detailed feature whereby reset
the nose 92 from teeth 63a against the under
solenoid 40 on the stopping unit is energizable
side of the projection 00a on the driving pawl
to permit the score indicator disc I3 and its driv
for the disc 63 thereby raising the latter also
ing disc I2 to be restored to a normal starting
from engagement with teeth 63a and permitting
position while the driving solenoid 50 is ener
the disc 63 to be rotated in an anti-clockwise 0 gizable by any means to advance the disc I2 one
direction by spring 64, which would present the
or more steps depending upon the length of
greatest or nearest radial stopping formation or
stroke the lever I6 is permitted to take.` The
edge 10 in a, position of alignment with the offset
stroke of lever I6 is governed by the position of
I6b on the driving lever I6 of the step-up unit,
the disc B3, and the reset solenoid 55 is energizable
thus permitting the latter to make only its mini 55 for a relatively prolonged period (quite brief in
mum stroke movement as illustrated in Fig. 2.
Such a minimum stroke of lever I6 could be
practice) to permit the disc 63 to move in anti
clockwise direction the limit of its range until
caused by engagement with a playing piece or
the formation ‘I0 is in stopping position, which
ball || 5 (Fig. '7) with switch means IIB closing
corresponds to the shortest possible stroke for
a circuit via conductor I |'| to energize the driving 70 the step-up lever. A briefer or momentary ener
solenoid 50 and cause the plunger 5I to be fully
gization of solenoid 95 would permit the disc
attracted as in Fig. 2 with the offset stopping
63 to move less than its full range in anti-clock
projection IBb bearing against stop formation
wise direction to present one of the intermediate
10 restored to its normal position as indicated
stopping formations in stop position.
in Fig. 2 wherein it will be observed that the 75 Another mode of operation for the variable
2,410,708
stroke un'it resides in adjusting the length of the
stroke of the lever 69 by means of a set-screw
16a so that the pawl 19 would move toward the
right a distance of only one tooth. In this man
ner each energization of the solenoid 15 would
correspond to a movement of one of the stop `
formations 10 . . . 10c, so that if the solenoid 95
were energized by any means to permit disc 63
to move its entire range to a starting position
in which the formation 10 would be in stopping
position opposite the oiîset lBb, then each ener
gization of solenoid 15 would eiïect a step by step
movement of disc 63 in the opposite direction to
present the intermediate stop formations in suc
cession in stopping position. The circuit con
nections of Fig. 7 may be utilized without change
to procure this operation.
The utility of the locking pawl |00 resides in
the fact that fraudulent interference with the
normal operation of the mechanism is prevented
thereby in -those instances where the apparatus is
jarred or pounded deliberately with the object of
causing the pawls I0 or 30 to reseat before the
10
pawl means cooperable therewith to advance said
member in one direction, means yieldably urging
said member in an opposite direction, releasable
holding pawl means normally preventing said op
posite movement, and electromagnetic pawl
means energizable to permit release of said hold
ing means and step by step movement of said stop
member in said opposite direction.
2. Indicatìng mechanism comprising in combi
nation a rotatable ratchet disc, an oscillable driv
ing pawl for advancing said disc in a given direc
tion, means tending to rotate said disc in an op
posite direction, releasable holding means nor
mally restraining said disc in said opposite move
ment, means including a reciprocable member a1
ways movable in a maximum displacement for
oscillating said pawl means, a variable stroke
member mounted for pivotal movement about an
axis parallel with the axis of movement of said
20 ratchet disc and at a point displaced in a radial
- disc l2 has had time to move all the way back to
zero position, thus leaving the lapparatus stand
sense from the center of oscillation of said driv
ing pawl, said variable stroke member having a
plurality of stop formations disposed at varying
radial distances from the center of movement
thereof opposite said oscillable pawl means and
each adapted to be moved into a position of stop
ping engagement with the latter .to limit the
ing with an advanced score instead of a -zero
score. The locking pawl remains in locking con
strokes thereof, means for eilecting movement in
dition once the reset mechanism is actuated, and
opposite directions of said variable stroke mem
cannot be withdrawn from lockingposition until
the disc moves into zero position, as by action of 30 ber to selectively position said stop formations
for -the purpose aforesaid, and means providing a
.the pin |03; or, in an optional arrangement as
yieldable driving connection between said os
when the step-up mechanism is first actuated
cillable pawl means and said reciprocable member
after the device has been reset. The latter ar
vto permit the latter to move its maximum dis
rangement has advantages in some installations
placement notwithstanding limitations of move
because no amount of abuse of the apparatus can
ment of the oscillable pawl means, together with
cause a dislodgement of the ratchet disc I2 and
means for eiîecting release of said holding means.
associated parts from zero position where pin |03
3. In a. device of the class described including
is removed.
a pawl and ratchet advancing means movable
A further utility in the locking arrangement re
sides in the fact that heretofore certain addi 40 back and forth to eiîect advance of an indicator
tional means, such as a dash-pot or other slow
acting device has been required to disable the
scoring circuits during the time the score dials
and ratchets were returning to zero to prevent
the possibility of playing the game or apparatus
during the interval required for transit of the
dial back to zero, as when .the player pushes a
starting button or operates a coin slide-if the
game happens to be coin-controlled-before the
reset parts are fully restored to zero position.
or lthe like, variable stroke mechanism compris
ing: a stop member mounted for movement op
posite the path of movement of part of said ad
vancing means, said stop member having a plu
rality stop parts disposable in positions to be en- `
gaged by and block the aforesaid part of the ad
vancing means to limit movement of said advanc
ing meansv different distances depending upon the
position of the stop member relative to the afore
said part of the advancing means, together with
By locking the essential operating parts as afore
said, resort Ito expediencies like the dash pot is
electromagnetic control means, means for se
avoided, with a result which is at once cheaper,
simpler, and more reliable.
limit movement of the advancing means by block
ing action as aforesaid.
While the foregoing description is specific to
cer-tain details of construction and operation of
the practical embodiment shown, it is to be un
derstood that `the appended claims contemplate
and include equivalent construction and modes of
operation coming Within their scope and fair in 60
tent.
>
lectively moving said stop member to selectively
4. In a pawl and ratchet drive for a rotatable
member, an oscillable drive member and pawl
means actuated thereby to effect rotative move
ment> of said rotatable member, means for ef
fecting oscillation of said drive member, stop
means disposed eccentrically of the axis of oscil
lation of said oscillable member, a. variable stroke
disc mounted for oscillation opposite said stop
We claim:
means about an axis approximately parallel with
1. In a variable stroke device a main operating
that of the oscillable member and having radially
lever mounted for oscillation, means for oscil
and peripherally oiîset blocking means position
lating said main lever, and variable stroke means 65
able selectively by selective movement of said
including a stop member positioned for move
variable stroke disc in blocking position opposite
ment adjacent said main lever and having a
said stop means to limit the displacement of said
plurality of stop formations disposed at varying
drive member, spring means tending to move said
radial distances from the center of pivotal move
ment of said member and each positionable by 70 variable stroke disc in one direction, ratchet
means on said variable stroke disc, disengageable
movement of said stop member into a stopping
holding pawl means normally engaging said
position opposite a portion of said main lever to
ratchet means to prevent movement of the vari
limit the movement of the latter in one direction,
able stroke disc in said one direction, driving
together with means for selectively moving said
stop member and including an electromagnetic 75 pawl means cooperable with said ratchet meansv
11
2,410,708
12
on said variable stroke dise to move the latter in
latter into a, normal pomtion toward the oper
an opposite direction, and means for selectively
ating lever and away from the plunger, means
actuating the several pawl means aforesaid to
limiting movement of this dog-leg by said spring
control the movements of said rotatable member.
means, and pivotal connection between said
5. In a variable stroke device, a pivoted stop
plunger and dog leg near the end of the latter
disc, means yieldably tending to move said disc
remote from its pivot point.
in one direction, holding pawl means releasably
8. In a step-up unit including a ratchet disc
preventing movement of said disc in said one
adapted to be rotatively moved by pawl means,
direction, driving pawl means operable to move
the combination with said dise of a driving pawl
said disc in an opposite direction, and stop 10 for advancing the disc in one direction, means
means oil'set at various radial distances with re
for moving the disc in the opposite direction, a
spect to the direction of pivotal movement of
withdrawable holding pawl normally holding the
said disc and each adapted to be disposed in
disc
in advanced positions against movement in
movement-limiting blocking position with re
said opposite direction, a safety locking pawl
spect to a stroke mechanism to be controlled by
including a blocking portion adapted to block
said variable stroke device, and means for actu
operative engagement oi! said driving and hold»
ating said pawl means to effect pivotal movement
lng pawls with said disc when said locking pawl
said disc to selectively position said stop means
is in a certain position, means tending normalbv
for the purpose set forth.
to move the locking pawl into said certain Dosi
6. In a variable stroke step up unit, a driving 20 tion, means on said locking pawl engaged by said
lever plvoted between its ends and adapted to be
holding pawl when the latter is in operative
moved in i'ull stroke and less than full stroke dis
engagement with said disc to prevent movement
placement, a solenoid having a plunger with pre
of the locking pawl into said certain position, but
determined operating stroke in the general direc
permitting said movement of the locking pawl as
tion of operating displacement of one end of said 25
soon as the holding pawl is withdrawn, means for
lever and situated near said end, means opera
withdrawing the holding and driving pawls,
tively connected with said lever on the opposite
together, and means actuated by said disc in
side of its pivot point from said solenoid for yield
moving
in said opposite direction for restoring
ably urging the lever in operating movement in a
said locking pawl from said certain position to a
direction opposite to the stroke oi' the plunger, a 30 normal non-locking position.
break-away lever pivoted on said driving lever
9. In a step-up unit, a ratchet member, an
near the end thereof adjacent said plunger,
advancing pawl for said member, means nor
spring means urging the break-away lever into a
mally urging said ratchet member to a starting
normal position in a direction opposite from lthe
position in a direction opposite to the advance
operating stroke of said plunger, and means oper
thereof, a holding pawl normally engaged with
atively connecting the plunger and break-away
said
ratchet member to prevent movement toward
lever to eiiect movement of the driving lever in
starting
position as aforesaid, a safety locking
one direction upon energization of the solenoid so
lever, the same yieldingly urged to disengage said
that said plunger may move in full stroke not
holding pawl from the ratchet member and
withstanding restraint of the lever against full 40 including
means cooperating with said holding
stroke displacement.
7. In a device of the class described, a pivoted
operating lever, a solenoid having a plunger
arranged to move in full stroke in a direction tan
gential to an arc of movement through said lever,
and means providing a yieldable driving connec
tion between said lever and plunger to permit the
latter to make its full normal operating stroke
pawl when the locking lever is moved to a non
locking position to be held in said position until
the holding pawl is disengaged from the ratchet
member, and means moved by said ratchet mem
. ber to engage said locking lever and move the
latter to non-locking position upon movement of
the ratchet member to a predetermined position
with respect to said starting position, and means
notwithstanding restraint of said lever against
corresponding displacement by the plunger, said 50 for eiîecting disengagement of the holding pawl
with the ratchet member as aforesaid.
means comprising a dog-leg lever pivoted near
one oi' its ends on said operating lever at a point
between said plunger and the pivot of the operat
ing lever, spring means connected to the operat
ing lever and the bight of the dog-leg urging the .
ROBERT H. BREITHER.
HERMAN L. SEIDEN.
CHARLES T. BREITENS'I’EIN.
FRANK G. NICOLAUS.
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