US3835303A - Reset device for digit drums in counters - Google Patents

Reset device for digit drums in counters Download PDF

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Publication number
US3835303A
US3835303A US00325393A US32539373A US3835303A US 3835303 A US3835303 A US 3835303A US 00325393 A US00325393 A US 00325393A US 32539373 A US32539373 A US 32539373A US 3835303 A US3835303 A US 3835303A
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US
United States
Prior art keywords
reset
shaft
digit drums
resilient element
drums
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
US00325393A
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English (en)
Inventor
H Krauss
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.)
ELMEG Elektro Mechanik GmbH
Original Assignee
ELMEG Elektro Mechanik GmbH
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
Priority claimed from DE19722203257 external-priority patent/DE2203257C3/de
Application filed by ELMEG Elektro Mechanik GmbH filed Critical ELMEG Elektro Mechanik GmbH
Priority to US456835A priority Critical patent/US3912911A/en
Application granted granted Critical
Publication of US3835303A publication Critical patent/US3835303A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06M1/30—Design features of general application for zeroising or setting to a particular value using heart-shaped or similar cams; using levers
    • G06M1/303—Design features of general application for zeroising or setting to a particular value using heart-shaped or similar cams; using levers with drums

Definitions

  • ABSTRACT A reset device for resetting the digit drums of a counter wherein the drums are coupled by transfer pinions mounted on a shaft which is movable to disengage the transfer pinions from the digit drums during the resetting of the digit drums by reset fingers acting on heart-shaped cams associated with the digit drums, the reset device including a resilient element which is movable with the reset fingers, is engageable with the shaft and defines two stop positions of the shaft relative thereto, the positions being such that on operation of the device the shaft in one stop position is initially moved with the resilient element to disengage the transfer pinions from the digit drums, on further movement of the resilient element during which the reset fingers act on the cams to reset the digit drums, the shaft abuts a stop and the resilient element moves relative thereto to move the shaft into the other stop position, and during the reverse movement of the resilient element the shaft in the other stop position is moved back to reengage the transfer pinions with the digit drums and is thereafter moved
  • the invention refers to a reset device for the digit drums of counters having transfer pinions carried on a common shaft, the transfer pinions being disconnectable from the digit drums during the return movement of the digit drums which is effected by reset fingers acting on heart-shaped cams on the digit drums, the disconnection of the transfer pinions being limited by a stop.
  • this time sequence of the cycle of movement is to prevent the digit drums from being subject to a torque from the resetting before the transfer pinions have been disconnected, since otherwise the pinions can be jammed, and to prevent the digit drums from being freely rotatable after being set to zero and before their reengagement by the transfer pinions and hence movable under the effect of vibrations or the like.
  • This time cycle of movement is obtained relatively satisfactorily by known reset devices.
  • known devices are relatively costly, since they necessitate a multiplicity of components.
  • a reset slide guided in a sideplate which can be actuated either by hand or electromagnetically.
  • An arm is rotatably supported on this slide, the arm being rigidly connected to a resetcam pivotally supported on a spindle and carrying the reset fingers.
  • a pinion bridge carrying the transfer pinions is supported on this spindle, and a friction coupling is provided between the reset cam and the pinion bridge.
  • the reset fingers can act on the heart-shaped cams, as the reset cam pivots further relative to the pinion bridge.
  • the pinion bridge comes into engagement with the digit drums before the reset fingers are swung away out of the indentations in the heart-shaped cams corresponding with thezero positions of the digit drums, because of the friction coupling between the pinion bridge and the reset cam.
  • the reset cam again swings round relative to the pinion bridge so that the reset fingers leave the indentations in the heart-shaped cams.
  • the reset cam has a striker lying between two stops on the reset slide, by which the reset cam can be pivoted.
  • the pinion bridge supported on the same shaft is connected with the reset slide via an operating spring which bears on the axle of the transfer pinions and the striker.
  • This spring also serves as a toggle spring for the striker.
  • a reset cam and a pinion bridge are supported on a common shaft, the pinion bridge and the reset cam being pressed together by a spring.
  • two stops are provided, one of which presses the pinion bridge in the direction of the digit drums when the reset slide is not being actuated, whilst the other acts directly on the reset cam whenthe reset slide is actuated.
  • the reset slide is actuated both the reset cam and the pinion bridge are consequently swung across because of the spring. In this case the paths of swing are so proportioned that the transfer pinions come out of engagement before the reset fingers can act upon the heartshaped cams.
  • a reset device for resetting the digit drums of a counter having transfer pinions carried on a common shaft, which are disengageable from the digit drums during the return movement of the digit drums which is effected by reset fingers acting on heart-shaped cams on the digit drums, and the disengaging movement of the transfer pinions being limited by a stop
  • the reset device including a resilient element which acts on the shaft and is movable during movement of the reset fingers to reset the digit drums, the resilient element defining two stop positions for the shaft arranged so that, after the shaft in the first stop position has been moved to disengage the transfer pinions from the digit drums, the shaft is moved intorthe second stop position during further movement of the reset fingers and, during the reverse movement, after the
  • the transfer pinions can be brought out of engagement with the digit drums before the reset fingers begin to act on the heart-shaped cams and the transfer pinions, after disengagement, are reengaged with the digit drums before the reset fingers leave the sections of the heart-shaped cams corresponding with the zero position of the digit drums. Because of this, it is impossible for the digit drums to be subjected to a resetting torque before the transfer pinions are disengaged, and further that the digit drums are not freely rotatable after being set to zero and before reengagement by the transfer pinions and hence cannot then move under the effect of vibration and the like.
  • This reset device provides the possibility of an essentially simpler construction than the above described known devices with a considerable reduction in the number of components and correspondingly smaller outlay on assembly.
  • the inertia of the moving parts of the device is also considerably reduced so that the cycle ofoperation, which in the case of the known reset devices can be put at risk because of the inertia involved, is improved.
  • the resilient element can have various designs, in a preferred embodiment the element comprises two resilient tongues between which the shaft lies and which have spaced arcuate recesses defining the two stop positions.
  • the resilient element may, alternatively, comprise a single tongue, in which case the shaft of the transfer pinions is supported in slots in the sideplate of the counter and the tongue has two arcuate recesses.
  • the shaft during sliding rubs in the slots which with the embodiment of the resilient element comprising two tongues is avoided, since in this embodiment the shaft can be mainly supported by the spring tongues only and, for example, when two resilient elements are provided they can be the sole support of the shaft, the slots in the sideplates being omitted.
  • the reset device may include a pivotable pinion bridge, the pinion bridge and the resilient element being integral. This embodiment can be very simply and economically assembled because the pinion bridge and resilient element are one piece.
  • the reset fingers may be provided on a pivotable reset bridge, the reset bridge, the pinion bridge and the resilient element being integral.
  • a reset slide may be provided which is integral with the resilient element and the reset fingers.
  • the reset slide is, in this embodiment, preferably guided so that it is slidable lengthwise, and a reset finger for each digit drum is provided on the slide, the resilient element being arranged at the end of the slide facing the shaft. In the embodiment no angular movement, only a linear movement, occurs. All the parts effecting the resetting of the digit drums and the disengagement of the pinions are thereby united into a single part.
  • the transfer pinions may be provided with a circumferential groove and the reset bridge or the reset slide may be provided with ribs which are continuously engageable with the grooves in the transfer pinions and axially guide the digit drums.
  • the digit drums and the transfer pinions can be guided precisely in their axial alignment with one another in a simple manner.
  • spacing washers or like members i are provided, which must be assembled exactly by time-consuming tedious labour, so that the digit drums and the transfer pinions mesh together in the required manner.
  • the assembly of the counter is thus made easy by use of the reset devices as above described because any work of adjustment of the mutual alignment of the digit drums and transfer pinions is eliminated. This leads to a significant saving in cost.
  • the digit drums are preferably provided at their hubs with collars and the ribs are so formed that they remain continuously in the zone of the collars.
  • the digit drums are guided at their collars against axialmovement, and between the collars and the ribs there is only a small area of friction.
  • FIG. 1 is a side elevation of a counter provided with a reset device in accordance with the invention
  • FIG. 2 is a plan view of the counter as in FIG. 1, and
  • FIG. 3 is a side elevation of another embodiment of a reset device in accordance with the invention.
  • FIGS. 1 and 2 only those parts of the counter necessaryfor an understanding of the invention are shown. Thus the nearer sideplate of the counter is for the sake of clarity omitted and only the further sideplate l is shown.
  • digit drums3 are rotatably supported on a common shaft 2. These digit drums are provided with internal heart-shaped cams 4 which are used in resetting the drums 3.
  • the shaft 2 of the digit drums 3 extends through a slot 5 in a reset slide 6 which, at its front end, is formed as a reset button 7.
  • a tension spring 9 is attached by one end to an extension 8 of the sideplate l and at its other end engages in an ear 10 which is fitted to a pinion bridge 11.
  • This pinion bridge 11 is mounted for pivotal movement about an axis 12. At its free end the bridge is formed as a beak-shaped resilient element 13 which has two resilient tongues 14 and 15 which are provided with arcuate recesses defining two stop-positions 16 and 17 for a shaft 18 on which the transfer pinions 19 are rotatably supported.
  • a reset bridge 20 is formed integrally in one piece with the pinion bridge 11.
  • the bridge 20 includes ribs 21, which guide the digit drums 3 therebetween and each provide one reset finger 22 projecting laterally therefrom.
  • a stub axle 23 projecting laterally from the reset slide 6 is in engagement with the pinion bridge 11 so that, when the reset button 7 is actuated, the fingers 22 act upon the associated internal heart-shaped cams 4 of the digit drums 3.
  • the edges 24 of the ribs 21 remote from the axis of pivot are so formed that during the swing of the reset bridge they move past and close to the shaft 2 of the digit drums.
  • the digit drums 3 are provided with collars 25, which are prevented by the ribs 21 on both sides from shifting axially.
  • the transferpinions 19 each have a central circumferential groove 26 into each of which one of the ribs 21 extends, the ribs each having, in the zone of the grooves, a shaped edge so that they engage continuously in the grooves. Because of this both the digit drums and the transfer pinions are guided and maintained in their required mutual alignment; It is thus not necessary to align the digit drums and the pinions axially by spacer washers.
  • FIG. 3 The embodiment of a reset device shown in FIG. 3 comprises a reset slide 29 which has at the end facing the shaft 18, a beak-shaped resilient element 13' which resembles that shown in FIGS. 1 and 2.
  • This reset slide 29 is provided with ribs 21 which guide the digit drums 3 and are each provided with a reset finger 22' projecting laterally therefrom and which acts on the associated heart-shaped cam when the reset slide is moved.
  • the invention is not limited to the embodiments illustrated and described. Numerous variants are possible without departing from the spirit and scope of the invention. Thus it is for example possible to form the resilient element in other shapes and to provide, instead of a beakshaped resilient element, a single spring tongue with corresponding curvilinear recesses. Instead of such recesses, cam-shaped projections may be provided for the same purpose. Furthermore in the embodiment of FIG. 3, the transfer pinions can be provided with circumferential grooves and the ribs 21' be correspondingly formed so that the transfer pinions are axially guided by them.
  • a reset device for resetting the digit drums of a counter having transfer pinions carried on a common shaft, which are disengageable from the digit drums during the return movement of the digit drums which is effected by reset fingers acting on heart-shaped cams on the digit drums, the disengaging movement of the transfer pinions being limited by a stop
  • the improvement comprising a movably mounted resilient element for journalling and holding the shaft and being movable during movement of the reset fingers as resetting the digit drums;
  • the resilient element defining first and second stop positions for holding and rotatably supporting the shaft in either stop position, while impeding displacement of the shaft when in either position by resilient reaction, the resilient element having normal disposition, so that with the shaft in the first stop position, the digit drums engage the transfer pinions, the resilient means disposed for movement along a path, the stop positions in the resilient means being on said path, said path being radial with respect to an engaging disposition of the digit drums and of the transfer pinions;
  • the resilient element upon being moved by operation of the means for obtaining movement, holding the shaft as remaining in the first stop position for obtaining disengagement of the transfer pinions from the digit drums;
  • the transfer pinions engage and are being held by the digit drums upon continuation of said reverse movement, so that the shaft is being moved back from the second stop position into the first stop position, for normally rotatably supporting the shaft.
  • a reset device as claimed in claim 1, wherein the resilient element comprises two resilient tongues disposed in resilient relationship on opposite sides of the shaft and have arcuate recesses spaced along their length for defining the first and second stop positions.
  • a reset device as claimed in claim 1 including a pivotable pinion bridge for the shaft, the pinion bridge and the resilient element being integral, the pinion bridge pivoting about a point spaced apart from the shaft, the means for obtaining movement pivoting the pinion bridge.
  • a reset device as claimed in claim 1 the means for obtaining movement, including a reset slide formed integrally with the resilient element and the reset fingers.
  • the resilient element comprises two resilient tongues which lie resiliently on each side of the shaft and have arcuate recesses spaced along their length and defining the two stop positions.
  • a reset device as claimed in claim 10, wherein the resilient element comprises two resilient tongues which lie resiliently on each side of the shaft and have arcuate recesses spaced along their length and defining the two stop positions.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Transmission Devices (AREA)
  • Mechanical Operated Clutches (AREA)
  • Load-Engaging Elements For Cranes (AREA)
US00325393A 1972-01-24 1973-01-22 Reset device for digit drums in counters Expired - Lifetime US3835303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US456835A US3912911A (en) 1973-01-22 1974-04-01 Reset device for digit drums and counters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722203257 DE2203257C3 (de) 1972-01-24 Rückstellvorrichtung für die Ziffernrollen von Zählwerken

Publications (1)

Publication Number Publication Date
US3835303A true US3835303A (en) 1974-09-10

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US00325393A Expired - Lifetime US3835303A (en) 1972-01-24 1973-01-22 Reset device for digit drums in counters

Country Status (8)

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US (1) US3835303A (fr)
JP (1) JPS5551207B2 (fr)
CH (1) CH551051A (fr)
DD (1) DD101044A5 (fr)
FR (1) FR2169078B1 (fr)
GB (1) GB1405843A (fr)
IT (1) IT976763B (fr)
YU (1) YU35198B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4314149A (en) * 1978-12-20 1982-02-02 E.D. Veglia Daily mileage recording unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2900415C3 (de) * 1979-01-08 1981-08-06 J. Hengstler Kg, 7209 Aldingen Rückstelleinrichtung für mechanische Rollenzählwerke

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2980329A (en) * 1956-09-28 1961-04-18 Durant Mfg Co Counter resetting means
US3677468A (en) * 1970-07-22 1972-07-18 Veeder Industries Inc Counter mechanism
US3711684A (en) * 1970-05-15 1973-01-16 Elmeg Resetting device for the digital rolls of counters

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2980329A (en) * 1956-09-28 1961-04-18 Durant Mfg Co Counter resetting means
US3711684A (en) * 1970-05-15 1973-01-16 Elmeg Resetting device for the digital rolls of counters
US3677468A (en) * 1970-07-22 1972-07-18 Veeder Industries Inc Counter mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4314149A (en) * 1978-12-20 1982-02-02 E.D. Veglia Daily mileage recording unit

Also Published As

Publication number Publication date
CH551051A (de) 1974-06-28
DE2203257A1 (de) 1973-08-09
YU16073A (en) 1980-03-15
DD101044A5 (fr) 1973-10-12
JPS4884696A (fr) 1973-11-10
YU35198B (en) 1980-09-25
FR2169078A1 (fr) 1973-09-07
IT976763B (it) 1974-09-10
DE2203257B2 (de) 1975-09-18
JPS5551207B2 (fr) 1980-12-23
GB1405843A (en) 1975-09-10
FR2169078B1 (fr) 1977-02-04

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