NOV- 5» 1946- R. H. BREITHER ETAL 2,410,708 VARIABLE STROKE MECHANISM Filed July 18, 1941 3 Sheets-Sheet 1 ’ Irl/van Z075 l /' F @M NicaZau/s. N0V- 5» 1945 R. H. BREiTHER ETAL 2,410,708 VARIABLE STROKE MECHANISM Filed July 18, 1941 M 70a, 3 Sheets-Sheet 2 l \. a. l 11u. www'l I ,n Vi li" u I MUNI l "~ ¿0. /l l [nz/enfans' // Robert! f( Breil/¿er / Nov. 5, 1946. ' R- H. RRERRER Rm 2,410,708 VARIABLE S TROKE MECHANI SM " '0" ' 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.