US3912910A - Step-feed device - Google Patents

Step-feed device Download PDF

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Publication number
US3912910A
US3912910A US467824A US46782474A US3912910A US 3912910 A US3912910 A US 3912910A US 467824 A US467824 A US 467824A US 46782474 A US46782474 A US 46782474A US 3912910 A US3912910 A US 3912910A
Authority
US
United States
Prior art keywords
reset
lever
ratchet wheel
drive
coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US467824A
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English (en)
Inventor
Shikanosuke Ochi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sega Corp
Original Assignee
Sega Enterprises Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sega Enterprises Ltd filed Critical Sega Enterprises Ltd
Application granted granted Critical
Publication of US3912910A publication Critical patent/US3912910A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H67/00—Electrically-operated selector switches
    • H01H67/02—Multi-position wiper switches
    • H01H67/04—Multi-position wiper switches having wipers movable only in one direction for purpose of selection
    • H01H67/06—Rotary switches, i.e. having angularly movable wipers
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M1/00—Design features of general application
    • G06M1/08—Design features of general application for actuating the drive
    • G06M1/10—Design features of general application for actuating the drive by electric or magnetic means
    • G06M1/102—Design features of general application for actuating the drive by electric or magnetic means by magnetic or electromagnetic means
    • G06M1/104—Design features of general application for actuating the drive by electric or magnetic means by magnetic or electromagnetic means electromagnets, clicks
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M1/00—Design features of general application
    • G06M1/27—Design features of general application for representing the result of count in the form of electric signals, e.g. by sensing markings on the counter drum
    • G06M1/276—Design features of general application for representing the result of count in the form of electric signals, e.g. by sensing markings on the counter drum using mechanically-actuated contacts
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M1/00—Design features of general application
    • G06M1/28—Design features of general application for zeroising or setting to a particular value

Definitions

  • a step-feed device which comprises a ratchet wheel rotatably supported with a pivot on a base plate, a reset spring for biasing said ratchet wheel in its reset direction, a drive lever rockably supported with a pivot on said base plate, a drive claw pivotably supported by said drive lever so as to be freely rocked and having a tip end engageable with said ratchet wheel, a feed coil for rocking said drive lever, a reset lever rockably supported with a pivot on said base plate and provided with a locking claw engageable with said ratchet wheel at its tip end, a reset coil for rocking said reset lever, a back spring for backing said drive lever, an engaging spring for engaging both said drive claw and said locking claw with said ratchet wheel, and a holding lever rockably supported with the same pivot as said drive lever.
  • said reset lever when said reset lever is set at its reset state in response to energization of said reset coil, said reset lever is engaged with both said drive claw and said holding lever as intervening therebetween so that said reset lever may be held at said reset state and said drive claw may be disengaged from the ratchet wheel even after said reset coil has been denergized.
  • STEP-FEED DEVICE The present invention relates to improvements in a step-feed device for use ina totalizer, a calculator, a score display in a playing machine, etc.
  • step-feed devices which operate in such manner that in response to each input electric signal a movable body is advanced by one step either rotationally or linearly and in response to. application of a reset electric signal said movable body is reset to its home position to be ready for a subsequent step-by-step advancing motion.
  • non of the known step-feed devices was completely free from the shortcomings that the operation is not smooth, that the device is'less durable because of a large impact applied to the component parts upon each step-feed motion and each reset motion or because of wear of frictional parts, and that it is rather difficult to correctly and speedily mount the component parts on a base plate and to properly adjust the relative positioning of the component parts.
  • a more specific object of the present invention is to provide an improved step-feed device which can operate smoothly and which has a high durability.
  • the step-feed device is characterized in that said device comprises a ratchet wheel rotatably supported with a pivot on a base plate, a reset spring for biasing said ratchet wheel in its reset direction, a drive lever rockably supported with a pivot on said base plate, a drive claw pivotably supported by said drive lever so as to be freely rocked and having a tip end engageable with said ratchet wheel, a feed coil for rocking said drive lever, a reset lever rockably supported with a pivot on said base plate and provided with a locking claw engageable with said ratchet wheel at its tip end, a reset coil for rocking said reset lever, a back spring for backing said drive lever, an engaging spring for engaging both said drive claw and said locking claw with said ratchet wheel, and aholding lever rockably supported with the same pivot as said drive lever; and in that when said reset lever is set at its reset state in response to energization of said reset coil, said reset lever is engaged with both said drive claw
  • step-feed device Since the step-feed device according to the present invention is constructed as'describe'd above, under the state where neither said feed coil nor said reset coil is energized, both said drive claw andsaid locking claw are engaged with'said ratchet wheel, and so said ratchet wheel does not rotate at all while'keeping its stationary state.
  • said ratchet wheel is rotationally driven by said drive claw by an angle corresponding to one tooth.
  • said ratchet wheel is rotationally driven by an angle corresponding to the teeth equal in number to the number of input pulses transmitted to said feed coil.
  • step-feed operations are reliably achieved over a plurality of teeth corresponding in number to the number of the input pulses transmitted to said feed coil, and also if a reset pulse is transmitted to a reset coil, then the ratchet wheel is momentarily reset to its home position so that the subsequent step feed operation can be reliably started.
  • FIG. 1 is a front view showing one preferred embodiment of the step-feed device according to the present invention.
  • FIG. 2 is a side view of the same
  • FIG. 3 is a rear view of the same
  • FIG. 4 is a disintegrated perspectiveview of an essential part of the same embodiment
  • FIG.5 is a disintegrated perspective view of a ratchet wheel assembly
  • FIGS. 6 and 7 are front views of the essential part of the same embodiment showing its different operating states.
  • reference-numeral 1 designates a base plate, substantially at the center of which is formed a circular opening 2 (See FIG. 4), and on the back side of the base plate 1 is disposed a print wiring board 4 in parallel thereto and concentrically with to the circular opening 2 via a short cylindrical bearing 3 (See FIG. 2), the print wiring board 4 being integrally secured to the base plate 1 via a connecting piece 5.
  • a ratchet wheel 10 is fitted around a hexagonal prism portion 7 of the main shaft 6, to a threaded bore 12 provided in a sleeve 11 of the ratchet wheel is mated a setscrew not shown for fixedly securing the ratchet wheel 10 to the main shaft 6, to a parallel notch portion 8 of the main shaft 6 is fitted a wiper 13 made of an electrically insulating material, and to a threaded portion 9 of the main shaft 6 is mated a nut 14, so that upon rotationally driving the ratchet wheel 10 the wiper 13 can be also rotationally driven integrally with the ratchet wheel 10.
  • a coil spring 15 which is fixedly mounted to the sleeve 11 by means of a washer 16 and a retaining ring 18 to be fitted in an annular groove 17 on the main shaft 6, one end of the spring being engaged with an opening 19 in the ratchet wheel 10, while the other end of the spring being engaged with a pivot 20 projecting from the base plate 1 at right angles thereto.
  • a drive lever 22 and a holding lever 23 are rockably fitted around a pivot 21 projecting from the base plate 1 at right angles thereto, and a drive claw 25 is rockably supported with a pin 24 at the tip end of the drive lever 22.
  • a Teflon coating On an outer circumferential surface of a plunger 33 of the feed coil 29 which is rotatably coupled to the lower end of the drive lever 22 with a pin 35, is applied a Teflon coating. Therefore, the plunger 33 can smoothly and lightly slide along the internal bore of the feed coil 29 without fitting an anti-friction plastic ring around the outer circumferential surface of the plunger as is the case with the conventional solenoid coils, so that the outer diameter of the plunger 33 can be designed larger than the conventional ones to enhance the attractive force of the solenoid coil.
  • a stopper 36 is cut and erected from the base plate 1, so that the drive lever 22 abuts against the stopper 36 (See FIG. 1) and thereby it is restricted not to further rock in the clockwise direction.
  • a tension spring 39 is stretched between a projection 37 which is cut and erected from the base plate 1 and a protrusion 38 provided at the lower end of the holding lever 23.
  • a reset lever 40 is rockably fitted around the pivot 20, and the reset lever 40 is provided with a locking claw 41 at its tip end, and provided with an engaging arm 44 that is engageable with an upper bent piece 42 of the drive claw 25 as well as an upper bent piece 43 of the holding lever 23.
  • An engaging spring 47 is stretched between an upper projection 45 of the drive lever 22 and an upper central projection 46 of the reset lever 40, while a back spring 48 is stretched between the tip end pin 24 of the driver lever 22 and the pivot 20, so that the drive claw 25 and the locking claw 41 are biased by the tension of the engaging spring 47 to always engage with the ratchet wheel 10, and the drive lever 22 is rocked in the clockwise direction by the tension of the back spring 48 until it is engaged with the stopper 36.
  • a reset coil 49 that is constructed substantially in a similar manner to the feed coil 29, is mounted onto the base plate 1 with the same means as that used for the feed coil 29, and a plunger 50 of the reset coil 49 is rotatably mounted about a pin 51 on the reset lever 40.
  • a stopper 53 is adjustably mounted on the base plate 1 with screws 55 which pass through elongated adjustable openings 54 in the stopper so that it may engage with the projection 52.
  • an arcuated electric collector 56 is integrally mounted on the print wiring board 4, and the tip end of the electric collector 56 is adapted to always make contact with a ring-shaped disc 57 around the wiper 13 (See FIG. 2).
  • a pair of electric collectors 59 electrically connected to the ring-shaped disc 57 are adapted to be brought in contact with fixed contacts 60 provided on the print wiring board 14 at an interval corresponding to the teeth interval of the ratchet wheel 10, and the fixed contacts 60 are in turn connected to terminals 61, respectively.
  • the illustrated embodiment is constructed as described above, under the state shown in FIG. 1 where no pulse is transmitted to the feed coil 29 and the reset coil 49 and the projection 52 on the ratchet wheel 10 is engaged with the stopper 53, the electric collectors 59 make contact with the first fixed contacts 60a, and so zero signals are transmitted from the terminals 61.
  • the drive claw 25 When the input pulse transmitted to the feed coil 29 disappears, the drive claw 25 is moved back rightwardly by the tension of the back spring 48, so that the ratchet wheel 10 is rotated in the clockwise direction by an increment corresponding to one tooth, and accordingly, the electric collectors 59 are transferred from the first fixed contacts 60a to the second fixed contacts 60b to transmit a first output signal from the terminals 61.
  • the ratchet wheel 10 is rotationally driven tooth by tooth to transfer the electric collectors 59 successively onto the respective fixed contacts 60, and therefore, the ratchet wheel 10 is rotationally driven for a plurality of teeth corresponding in number to the number of the transmitted input pulses so that the electric collectors 59 are transferred to the fixed contacts 60 having a number of sequence equal to the number of the input pulses added with one, resulting in an output signal corresponding to the number of the input pulses.
  • the reset lever 40 is rotationally driven in the clockwise direction as shown in FIG. 7, so that the locking claw 41 which has been continuously engaged with the teeth of the ratchet wheel until that moment is disengaged from the teeth of the ratchet wheel 10. Also, the engaging arm 44 of the reset lever 40 is engaged with the upper bent piece 42 of the drive claw 25, so that the drive claw 25 is driven upwardly to be disengaged from the teeth of the ratchet wheel 10.
  • the drive lever is restored to its home position while rotating the ratchet wheel by one tooth as shown in FIG. 1. Then, the first output signal is transmitted from the terminals 61 of the print wiring board 4, and the step-feed device is ready to further operate in response to reception of a second and subsequent input pulses.
  • the operation of the step-feed device is very smooth and reliable, because of the fact that the holding lever 23 is provided separately from the drive lever 22 and the drive claw 25, the engaging arm 44 of the reset lever 40 being engaged with the holding lever 23, and the upper bent piece 42 of the drive claw 25 is adapted to be pushed upwardly by the engaging arm 44 of the reset lever 40.
  • the subject stepfeed device since a large impact force is not applied either to the drive claw 25 nor the engaging arm 44 of the reset lever 40, there is no fear to cause faults, and the subject stepfeed device has an extremely high durability.
  • the ratchet wheel can be formed in a very simple shape as shown in FIG. 5, the cost of the device is very low, and since the rotation of the ratchet wheel 10 is achieved via the metallic main shaft 6, it is hardly worn and excellent in durability.
  • the feed coil 29 and the reset coil 49 are mounted on the base plate 1 in the aforementioned manner, the mounting and dismounting are readily achieved, and once they have been mounted, they can be firmly secured to the base plate to bear against the reaction of the plungers.
  • stopper 53 is provided with the elongated openings 54, it is possible to freely adjust the relative position of the stopper 53 with respect to the projection 52.
  • a step-feed device characterized in that said device comprises a ratchet wheel rotatably supported with a pivot on a base plate, a reset spring for biasing said ratchet wheel in its reset direction, a drive lever rockably supported with a pivot on said base plate, a drive claw pivotably supported by said drive lever so as to be freely rocked and having a tip end engageable with said ratchet wheel, a feed coil for rocking said drive lever, a reset lever rockably supported with a pivot on said base plate and provided with a locking claw engageable with said ratchet wheel at its tip end, a reset coil for rocking said reset lever, a back spring for backing said drive lever, an engaging spring for engaging both said drive claw and said locking claw with said ratchet wheel, and a holding lever rockably supported with the same pivot as said drive lever; and in that when said reset lever is set at its reset state in response to energization of said reset coil, said reset lever is engaged with both said drive claw and said holding lever as intervening

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Electromagnetism (AREA)
  • Transmission Devices (AREA)
US467824A 1973-06-18 1974-05-07 Step-feed device Expired - Lifetime US3912910A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1973071183U JPS529985Y2 (enrdf_load_stackoverflow) 1973-06-18 1973-06-18

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US3912910A true US3912910A (en) 1975-10-14

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Application Number Title Priority Date Filing Date
US467824A Expired - Lifetime US3912910A (en) 1973-06-18 1974-05-07 Step-feed device

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US (1) US3912910A (enrdf_load_stackoverflow)
JP (1) JPS529985Y2 (enrdf_load_stackoverflow)
BR (1) BR7404920D0 (enrdf_load_stackoverflow)
ES (1) ES427355A1 (enrdf_load_stackoverflow)
GB (1) GB1466477A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028530A (en) * 1974-05-22 1977-06-07 Hans Bud Counting devices
US4521895A (en) * 1982-11-29 1985-06-04 Veeder Industries Inc. Pulse generator unit for fuel pump register

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5844814Y2 (ja) * 1976-06-15 1983-10-12 新ダイワ工業株式会社 刈払機における肩掛け具

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2323235A (en) * 1940-11-07 1943-06-29 Bell Telephone Labor Inc Electromagnetic counting device
US3100602A (en) * 1963-08-13 figures
US3112068A (en) * 1960-09-23 1963-11-26 Hartkorn Karl Heinz Electromagnetically operated counter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100602A (en) * 1963-08-13 figures
US2323235A (en) * 1940-11-07 1943-06-29 Bell Telephone Labor Inc Electromagnetic counting device
US3112068A (en) * 1960-09-23 1963-11-26 Hartkorn Karl Heinz Electromagnetically operated counter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028530A (en) * 1974-05-22 1977-06-07 Hans Bud Counting devices
US4521895A (en) * 1982-11-29 1985-06-04 Veeder Industries Inc. Pulse generator unit for fuel pump register

Also Published As

Publication number Publication date
JPS5018890U (enrdf_load_stackoverflow) 1975-03-03
ES427355A1 (es) 1977-05-01
GB1466477A (en) 1977-03-09
JPS529985Y2 (enrdf_load_stackoverflow) 1977-03-03
BR7404920D0 (pt) 1975-01-07

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