US3793510A - Add and subtract relay - Google Patents

Add and subtract relay Download PDF

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Publication number
US3793510A
US3793510A US00336488A US3793510DA US3793510A US 3793510 A US3793510 A US 3793510A US 00336488 A US00336488 A US 00336488A US 3793510D A US3793510D A US 3793510DA US 3793510 A US3793510 A US 3793510A
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United States
Prior art keywords
wheels
ratchet wheels
ratchet
solenoid
subtract
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Expired - Lifetime
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US00336488A
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English (en)
Inventor
R Garbark
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MYLSTAR ELECTRONICS Inc
GOTTLIEB D AND CO
GOTTLIEB AND CO D
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GOTTLIEB AND CO D
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Assigned to MYLSTAR ELECTRONICS, INC. reassignment MYLSTAR ELECTRONICS, INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: D. GOTTLIEB & CO.
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M3/00—Counters with additional facilities
    • G06M3/14—Counters with additional facilities for registering difference of positive and negative actuations

Definitions

  • wheels are axially detented together with one of them being axially shiftable with respect to the frame for operating a switch when the wheels are rotated out of,
  • an object of the present invention to provide an add and subtract relay for a pinball machine or the like which is inherently shockproof and in which a shock applied in any direction is self-cancelling and. incapable of producing any net movement of either the add or subtract portions of the relay. More specifically, it is an object of the present invention to, provide an add and subtract relay having solenoids which are arranged side 7 by side and having ratchet wheels upon which the teeth are faced in the same direction so that a shock has an equalized effect upon the ratchet wheels thereby precluding any net movement of one wheel with respect to the other.
  • FIG. 1 is a face view of an add and subtract relay constructed in accordance with the invention.
  • FIG. 2 is a sectional view of the relay of FIG. 1 looking along the line 2--2 therein.
  • FIG. 3 is a fragmentary left-hand view of the relay of FIG. 1 as viewed along the line 33.
  • FIG. 4 is a transverse section looking along the line 4-4 in FIG. 2.
  • FIG. 5 is an underside view of the relay shown in FIG. I.
  • FIG. 6. is a fragmentary view similar to FIG 3, but showing the relative shifting movement between, the ratchet wheelsfor actuating a switch.
  • FIG. 7 isa fragmentary section looking along the line 77 of FIG. 2 and showing rotational stop surfaces between the two adjacent ratchet wheels.
  • FIG. 8 is a fragmentary perspective showing one of the drive pawls.
  • the frame which is of boxy shape, is formed of a back plate 11 having an integral end plate 12 providing a bearing 13. Secured to the plate 1 l is a second end plate 14 providing a bearing 15, the plates ll, 14 being secured together by one or more machine screws 16.
  • the plate 11 is bent inwardly at 18 to provide a solenoid mounting ledge and additionally bent inwardly at 19 to provide a surface for mounting keeper pawls which will be referred to in due course.
  • a mounting bracket 19 is provided which may, if desired, be spot welded to the plate 11.
  • solenoid assemblies Arranged side by side on the plate 11 are add and subtract solenoid assemblies indicated at 21, 22 respectively. Taking the solenoid assembly 21 by way of example, it is seated upon the ledge 18 and the magnetic circuit is completed via an auxiliary pole piece 23 which is secured to the plate 11 by means of machine screws 24.
  • the assembly 21 has the usual hollow cylindrical winding 25 in which a core or armature 26. is freely telescoped. Pivoted to the end of the armature by a pivot 27 is a drive pawl 28. Encircling the armature, and pressing against the drive pawl is a return spring 29.
  • a ratchet wheel 30 which is preferably of molded construction having an integral shaft 31, a web 32 and a rim 33 which presents a set of ratchet teeth 34.
  • a keeper pawl 35 in the form of a U-shaped piece of spring Wire secured by a clamp 36 and machine screw 37 to the flange l8.
  • the drive pawl 28 includes a central blade-like portion 40 having laterally extending shoulders 41 42 which present a sharp front edge 43.
  • stop fingers 45, 46 are integrally formed in the frame plate 11 (see also FIG. 5).
  • the fingers 45, 46 have a relief space
  • the two ratchet wheels 30, 30s are arranged coaxially and have cooperating axially facing detent surfaces which are biased together, one of the ratchet wheels being journaled for shifting movement to operate a switch when the ratchet wheels move out of, and into, a reference phase position.
  • the shaft 31 of the ratchet wheel 30 is slidably mounted in bearing 15, and the two ratchet wheels have detent surfaces 50, 50s (FIG. 6) which are biased together by a light coil spring 51.
  • a switch 52 mounted on the plate 14 responds to the endwise shifting movement.
  • the detent surfaces 50, 50s are nested together and the switch 52 is open.
  • the detent surfaces cam edgewise upon one another shifting the ratchet wheel 30 endwise against the restoring force of the spring 51 and. closing the switch 52 as shown in FIG. 6.
  • the add solenoid may be stepped forwardly a number of steps with the first step serving to unseat the detented surfaces to throw the switch. Subsequently, when the subtract solenoid assembly is stepped forwardly an equivalent number of steps, the ratchet wheels are restored to their relative in-phase position resulting in seating of the detent and restoration of the-switch contacts to their initial condition.
  • the shafts of the two ratchet wheels are extended concentrically and cooperating means are provided at the ends of the shafts for indicating the degree, that is, the number of steps, of offset of the ratchet wheels from their condition of coincidence. More specifically in accordance with the invention, at least one of the concentric shafts is provided with a disc carrying indicia reading directly in the number of steps of offset while the other shaft carries an indicator.
  • the outer of the two concentric shafts 31s carries a disc 60 having a row of.indicia 61 while the inner shaft has, mounted upon its end, a disc 62 having an indicator in the form of a viewing window 63.
  • the disc 62 is secured to the inner shaft by a screw 64.
  • a zero is viewable through the window 63.
  • the disc 62 associated with the add solenoid is indexed forwardly, a progressively higher number is exposed.
  • stepping of the subtract solenoid moving the disc 60 in the same direction, progressively reduces the count until it is restored to zero accompanied by operation of the switch.
  • the disc 60 carries a double set of indicia, from zero to nine in two cycles, and the disc 62 carries a double set of indicators in the form of viewing windows 63 arranged 180 apart.
  • rotational stop surfaces are provided between the two ratchet wheels so that relative motion is limited, in the present instance to 180.
  • One stop member may conveniently be in the form of an axially extending screw 70 which is screwed into the web of one of the ratchet wheels and which engages a radially extending stop member 71 integrally formed in the other.
  • the web 32 (FIG. 2) may be formed with a circular row of holes of a diameter just slightly less than the screw diameter, and the screw may be forcibly screwed into a selected hole cutting its own shallow thread.
  • ratchet wheels having 20 teeth may be used to provide up to of offset corresponding to ten steps; in other words, the present add and subtract relay may be used to provide a maximum credit of ten.
  • the double set of indicia and the two indicators enable the user of the machine to read a number which is in generally upright position. Indeed, for viewing purposes, the lower half of the disc 62 may be masked from view so that only the window showing an upright number, and which is in the top half, is viewable at any given time.
  • the relay initially occupies the state shown in FIGS. 1 and 2, with the switch 52 turned off and with zero games visible in the viewing window. If it is assumed that three coins are inserted to purchase a total of three games, the coins, by means not shown, impulse the add solenoid 21 three times, indexing the disc 62 so that the number 3 shows through the viewing window. The first of the impulses operates the switch 52 to turn the machine on for the playing of the first game.
  • the add solenoid is impulsed, by means not shown, indexing the disc 62 forwardly one step and changing the indication from 2 to 3".
  • the add and subtract relay thus provides a continuously indicated running credit of the number of games both paid for and free which may be played on the machine before additional payment is required.
  • any applied shock tends to be self-cancelling as far as movement of the ratchet wheels is concerned. This will be shown by considering the effect of a blow from the right, as viewed in FIGS. 1 and 2, which is the most effective direction from which a blow may be applied. Such a blow will, it is true, tend to move the armatures 26,26s against the force of their return springs to theright, i.e., into the solenoids.
  • any blow of reasonable magnitude will displace the armatures less than one toothdistance so that the drive pawls will be promptly restored to initial position without any movement of the ratchet wheels.
  • both of the ratchet wheels will be advanced one unit in the same direction so that the relative positions of the two ratchet wheels, and the number which is viewable at the indicator, will remain unchanged. This removes any possibility that a free game may be obtained by jarring or dropping the machine.
  • the fingers45, 46 which engage and guide each of the drive pawls are formed to cam the pawl radially inward to a positive blocking position at the end of the return stroke. This insures that where one of the ratchet wheels is indexed forwardly by action of its solenoid and return spring, there is no possibility that the other ratchet wheel will be disturbed, even though considerable friction might exist, due to failure of lubrication, between the two ratchet wheels.
  • the present relay may be expected to operate reliably without any need for maintenance or attention over long periods of time, for example the life span'of the playing machine in which the unit is used.
  • detent surfaces 50, 50s directly upon the engaged end surfaces of the ratchet wheels
  • the detent surfaces need not be integral with the ratchet wheels but may be located in a remote position.
  • perfectly flat, non-detented surfaces may, if desired, be provided between the adjacent ratchet wheels, and cooperating detents may, instead, be provided between the discs 60, 62.
  • the detent surfaces are of the simple, opposed type interposed between the discs, the change would be accompanied by reversing the direction of the biasing spring 51, for example, by interposing the spring in the space between the two adjacent ratchet wheels.
  • cooperating axially facing detent surfaces is not limited to detent surfaces actually formed on the ratchet wheels.
  • stop screw 70 may be screwed into any selected hole in the web 32 of Wheel 30 to limit the range of relative movement.
  • An add and subtract relay for a pinball machine or the like comprising, in combination, a frame, an add solenoid having a drive' pawl and associated ratchet wheel, a subtract solenoid having a drive pawl and associated ratchet wheel, the ratchet wheels being arranged coaxially and having cooperating axially facing detent surfaces biased into engagement, one of the ratchet wheels being axially shiftable with respect to the frame and the detent surfaces being so formed that when the ratchet wheels are in phase the shiftable wheel occupies a reference axial position but when the ratchet wheels are rotationally offset from one another the shiftable wheel occupies a shifted position, and a switch responsive to the shifting movement, the ratchet wheels having teeth faced in the same direction and the solenoids being arranged side by side symmetrically with respect to the ratchet wheels thereby to preclude rotation of one of the ratchet wheels with respect to the other upon application of shock to the relay.
  • An add and subtract relay for a pinball machine or the like comprising, in combination, a frame, an add solenoid having a drive pawl and associated ratchet wheel, a subtract solenoid having a drive pawl and associated ratchet wheel, the ratchet wheels being arranged coaxially and coupled to respective axially facing detent surfaces, one of the detent surfaces being axially shiftable with respect to the frame and so coupled to the ratchet wheels that shifting takes place when the ratchet wheels move into and out of phase with one another, a switch responsive to the shifting movement, the ratchet wheels having teeth faced in the same direction and the solenoids being arranged side by side symmetrically with respect to the ratchet wheels thereby to preclude rotation of one of the ratchet wheels with respect to the other upon application of shock to the relay.
  • An add and subtract relay for a pinball machine or the like comprising, in combination, a frame, an add solenoid having a drive pawl and associated ratchet wheel, a subtract solenoid having a drive pawl and associated ratchet wheel, the ratchet wheels being arranged coaxially side by side, means including a switch coupled to the ratchet wheels and so arranged that the circuit is made and broken as the ratchet wheels are indexed into and out of an in-phase condition, the ratchet wheels having teeth faced in the same direction and the solenoids being arranged side by side symmetrically with respect to the ratchet wheels so that a shock applied to the relay has the same effect upon each of the wheels thereby to preserve their relative phase positions, and means coupled to the wheels for providing constant visual indication of the degree the wheels are offset in phase from one another.
  • An add and subtract relay for a pinball machine or the like comprising, in combination, a frame, an add solenoid having a drive pawl and associated ratchet wheel, a subtract solenoid having a drive pawl and associated ratchet wheel, the ratchet wheels being arranged coaxially side by side, means including a switch coupled to the ratchet wheels and so arranged that the circuit is made and broken as the ratchet wheels are indexed into and out of an in-phase condition, the ratchet wheels having teeth faced in the same direction and the solenoids being arranged side by side symmetrically with respect to the ratchet wheels so that a shock applied to the relay has the same effect upon each of the wheels thereby to preserve their relative phase positions, means coupled to the wheels for providing constant visual indication of the degree the wheels are offset in phase from one another, and stops interposed between the ratchet wheels for limiting the maximum amount of offset,
  • one of the ratchet wheels has a circular series of axially facing openings and in which a screw is screwed into a selected one of the openings and in which a radially extending stop surface is provided on the remaining ratchet wheel in the path of movement of the screw.
  • An add and subtract relay for a pinball machine or the like comprising, in combination, a frame, an add solenoid having a drive pawl and'associated ratchet wheel, a subtract solenoid having a drive pawl and associated ratchet wheel, the ratchet wheels being arranged coaxially and having axially facing detent surfaces biased into engagement, one of the ratchet wheels being axially shiftable with respect to the frame and the detent surfaces being so formed that when the ratchet wheels occupy an inphase position the shiftable whee] occupies a reference axial position but when the ratchet wheels are rotationally offset from one another the shiftable wheel occupies a shifted position, a switch responsive to the shifting movement, the ratchet wheels having teeth faced in the same direction and the solenoids being arranged side by side symmetrically with respect to the ratchet wheels so that a shock applied to the relay has the same effect upon each of them thereby to preserve the relative positions of the wheels, and means for providing constant visual indication
  • An add and subtract relay for a pinball machine or the like comprising, in combination, a frame, an add 1 solenoid having a pawl and associated ratchet wheel, a
  • An add and subtract relay for a pinball machine or the like comprising, in combination, a frame, an add solenoid having a drive pawl and associated ratchet wheel, a subtract solenoid having a drive pawl and associated ratchet wheel, the ratchet wheels being arranged coaxially and having cooperating axially facing detent surfaces'biased into engagement, one of the ratchet wheels being axially shiftable with respect to the frame so that when the wheels are relatively indexed in and out of phased condition the shiftable wheel is shifted endwise, a switch responsive to the shifting movement, the teeth on the ratchet wheels being faced in the same direction and the solenoids being located side by side on the same side of the ratchet wheels so that a shock applied from any direction is ineffective to produce.
  • each of the ratchet wheels having a keeper pawl
  • the solenoids each having a return spring and so arranged that when the solenoid is operated the drive pawl thereon takes a tooth of the associated ratchet wheel and so that when the solenoid is deenergized the ratchet wheel is stepped forwardly by the force of the return spring.
  • An add and subtract relay for a pinball machine or the like comprising, in combination, a frame, an add solenoid having a drive pawl and associated ratchet and the detent surfaces being so formed as to produce 4 shifting movement when the ratchet wheels are relatively indexed into and out of the in-phase condition, a switch responsive to the shifting movement, the
  • ratchet wheels being faced in the same direction and the solenoids being symmetrically located side by side with respect thereto so as to preclude differential rotation of the ratchet wheels in the face of applied shock, the solenoids having return springs so that upon deenergization the drive pawl takes a tooth and so that upon deenergization the drive pawl is thrust forwardly by the spring to advance the associated ratchet wheel, each of the drive pawls having a' stop to limit forward movement and each of the stops having an associated camming surface for camming the drive pawl radially inwardly toward the associated ratchet wheel incident to completion of forward movement for positively blocking the ratchetwheel against rotation in either direction.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Pinball Game Machines (AREA)
  • Slot Machines And Peripheral Devices (AREA)
  • Measurement Of Distances Traversed On The Ground (AREA)
US00336488A 1973-02-28 1973-02-28 Add and subtract relay Expired - Lifetime US3793510A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US33648873A 1973-02-28 1973-02-28

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US3793510A true US3793510A (en) 1974-02-19

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US00336488A Expired - Lifetime US3793510A (en) 1973-02-28 1973-02-28 Add and subtract relay

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US (1) US3793510A (fr)
JP (1) JPS5130037A (fr)
BE (1) BE811202A (fr)
DE (1) DE2406839A1 (fr)
ES (1) ES423328A1 (fr)
FR (1) FR2219469B3 (fr)
GB (1) GB1451529A (fr)
IT (1) IT1007185B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4873706A (en) * 1988-03-09 1989-10-10 Schweitzer Edmund O Jun Electromechanical pulse counter
US20040257102A1 (en) * 2003-06-20 2004-12-23 Wong Hong W. Secure content protection for board connections
CN105895455A (zh) * 2016-06-28 2016-08-24 张学衡 一种高压高频响接触器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426715A (en) * 1941-10-09 1947-09-02 Production Instr Company Counting device
US2551656A (en) * 1949-01-24 1951-05-08 Raymond T Moloney Reversible counter and indicator
US3112067A (en) * 1959-03-13 1963-11-26 Gamewell Co Electric differential counter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426715A (en) * 1941-10-09 1947-09-02 Production Instr Company Counting device
US2551656A (en) * 1949-01-24 1951-05-08 Raymond T Moloney Reversible counter and indicator
US3112067A (en) * 1959-03-13 1963-11-26 Gamewell Co Electric differential counter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4873706A (en) * 1988-03-09 1989-10-10 Schweitzer Edmund O Jun Electromechanical pulse counter
US20040257102A1 (en) * 2003-06-20 2004-12-23 Wong Hong W. Secure content protection for board connections
CN105895455A (zh) * 2016-06-28 2016-08-24 张学衡 一种高压高频响接触器

Also Published As

Publication number Publication date
DE2406839A1 (de) 1974-08-29
ES423328A1 (es) 1976-04-16
GB1451529A (en) 1976-10-06
FR2219469A1 (fr) 1974-09-20
BE811202A (fr) 1974-06-17
FR2219469B3 (fr) 1976-11-26
JPS5130037A (fr) 1976-03-13
IT1007185B (it) 1976-10-30

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