US3636790A - Play-eliminating setting apparatus - Google Patents

Play-eliminating setting apparatus Download PDF

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Publication number
US3636790A
US3636790A US84060A US3636790DA US3636790A US 3636790 A US3636790 A US 3636790A US 84060 A US84060 A US 84060A US 3636790D A US3636790D A US 3636790DA US 3636790 A US3636790 A US 3636790A
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US
United States
Prior art keywords
gear train
rotary
gear
setting
biasing
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
US84060A
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English (en)
Inventor
Hermann Bertrang
Horst Spormann
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.)
Digital Kienzle Computersysteme GmbH and Co KG
Original Assignee
Kienzle Apparate 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
Application filed by Kienzle Apparate GmbH filed Critical Kienzle Apparate GmbH
Application granted granted Critical
Publication of US3636790A publication Critical patent/US3636790A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/12—Recording devices
    • G01P1/122—Speed recorders
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B35/00—Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19623—Backlash take-up

Definitions

  • a lost-motion device permits rear- [521 0.8. CI. ..74/409, 346/20 ward for ah angle of 180, and couples the [5]] IMOCL 17 55l18G01d9/QQ gear train with the blocking means so that the gear train is 581 Field olSeu-ch ..74/409; 346/20 blocked after limited rearward Setting which negligibly sions the biasing means.
  • the US. Pat. No. 3,105,731 discloses a setting apparatus for interconnected indicators in which the play introduced by forward setting is eliminated by a biasing means which includes a spring housing meshing with the gear of the gear train, and a spiral spring sliding on an inner surface of the spring housing. During rotation of the spring housing with the gear train in the forward direction, the spring is tensioned, and after the setting has introduced play into the gear train, all gears of the gear train are turned by the spring and spring housing in the opposite direction so that the play is eliminated.
  • the arrangement has the disadvantage that, if the indicating pointer is set in a rearward direction, the spring housing is turned rearward with the spring which is untensioned so that the spring device is no longer effective to eliminate the play from the gear train after a repeated setting in the forward direction.
  • the US. Pat. No. 3,105,73l provides a setting control means which permits a rearward setting for an angle of substantially 60, corresponding to 2 hours of the indication by the pointer. After the angular displacement of 60, further turning is blocked by a projecting portion of an interrupted gear. If the users of the device do not understand the technical reason for the arrangement, they always try to set the device rearward, and to overcome the lock which causes damage to the apparatus. Generally, a user has the tendency to set the device rearward if this can be accomplished by turning over an angle of less then l80, since if the angle is greater, setting in the forward direction requires turning of the device through a smaller angle of less then 180.
  • Another object of the invention is to provide a play eliminating setting apparatus of the above-described type, which can be set in rearward direction an angle of almost 360.
  • Another object of the invention is to connect the gear train by lost-motion means with blocking means so that rearward setting of the indicating pointer or diagram carrier for an angle of almost 360 is possible before the blocking means becomes effective.
  • an embodiment of the invention comprises rotary means, such as a diagram carrier support and a pointer indicating time, a gear train driven by drive means and rotating the rotary means always in the same forward.
  • setting means connectedwith a rotary means for turning the same in the forward direction, and also in rearward direction, whereby play is introduced'into the gear train during setting of the rotary means in the forward direction only; biasing means, preferably including a spring housing and a spiral spring frictionally connected with the spring housing, operatively connected, preferably by a gear on the housing, with the gear train so as to be loaded during rotation of the rotary means in the forward direction and being gradually untensioned during rearward setting; one-way blocking means preferably including a ratchet wheel and an escapementpawl, for blocking rotation of the gear train with the rotary means only in the rearward direction; and lost-motion means between the blocking means and the gear train, and preferably including a pin and a slot, permitting rearward setting of the rotary means with the gear train for a predetermined angle, preferably almost 360", before the blocking means blocks the gear train and thereby the setting means so that complete untensioning of the biasing means by continued rearward setting is prevented.
  • biasing means preferably including
  • the pin is secured to the spring housing and pro ⁇ 3 jects into a part-circular slot in the ratchet wheel.
  • FIG. 1 is a fragmentary side view, partially in section, illustrating an apparatus in accordance with the invention
  • FIG. 2 is a fragmentary perspective view, illustrating'a blocking means combined with a'lost-motion device used in the apparatus of FIG. I;
  • FIG. 3 is a cross-sectional view taken on'line A-A in FIG. 1, and illustrating the biasing means by which play is eliminated.
  • the apparatus is disclosed as embodied in a tachograph in which the driving clockwork for a diagram carrier support is mounted in a pivoted lid or cover on whose inner face, the diagram carrier support is arranged, while the outer face has a transparent cover behind which pointers indicate the time and speed measured by the tachograph.
  • the apparatus of the invention can be applied to any type of driving mechanism for diagram carriers or pointers, or for a transporting wheel transporting a record carrier tape or band.
  • the drive means include an electronic pulse generator, or a regulated electric motor of constant rotary speed, or a spring motor with a regulating escapement mechanism, not shown. Any of these drive motors can be used for driving the coupling part 4 shown in FIG. 1 which is fixedly secured to a shaft 5 whose ends are mounted in bearings of walls 2 and 3, as are the ends of all other shafts which will be described hereinafter.
  • a pinion 6 is secured to part 4, and meshes with a gear 7 mounted on a shaft 8 which further carries a gear 9 meshing with a gear 10 which is mounted on a shaft 11.
  • Shaft I l carries the pinion 12 which meshes with gear 13, which is secured to shaft 14 and connected by a friction coupling 15 on the one hand with a gear 16 and'on the other hand with a gear 17.
  • Gears 16 and 17 are the first gears of two branched gear trains.
  • Gear 16 serves for driving the diagram carrier support 18 through the meshing gears 19, 20, and 21, while gear 17 drives through meshing gears 22, 23 the minute pointer 23b and through gears 24, 25 an hour pointer 25b, respectively mounted on the hollow shaft 230 and 25a.
  • Setting means include a knurled knob secured to a pinion 29 meshing with a gear 28 which meshes with another setting gear 27 meshing with gear 23 for setting the minute pointer which is followed by the hour pointer.
  • diagram carrier support 18 is connected by gears 21, 20, l9, l6, 17, 22 with gear 23, the diagram carrier support 18 is set together with the minute pointer, but of course at a different speed since the diagram carrier support 18 turns one revolution in 24 hours, and rotates at half the speed of the hour pointer.
  • Gear 21 which is connected with the diagram carrier support 18, meshes with a biasing gear 33 provided on the outside of a cylindrical spring housing 31 which is best seen in FIGS. 2 and 3.
  • the spring housing 31 is a wheel and has an outer wall 34 provided on the outside with the gear teeth 33, and on the inside with a smooth cylindrical surface on which the end portion 36 of a spiral spring slidingly rests.
  • the inner end of spring 35 is secured to a fixed shaft 32 which has a flat portions for securing the end of the spring.
  • Fixed shaft 32 is fixedly secured to the walls 2 and 3.
  • the phrase forward direction" is used in this application to denote a direction of rotation causing forward movements of the pointer and diagram carrier irrespective of whether individual rotary members rotate in clockwise or counterclockwise direction.
  • the spiral spring 35 is in the position of FIG. 3.
  • the spring housing 33 is driven by gear 21 in counterclockwise direction, as indicated by the arrow B, so that the spring is tensioned while the outer end 36 remains in frictional engagement at the original face portion of the inner surface of wall 34.
  • the end portion 36 of spring 35 turns the same angle in clockwise direction so that the spring is tensioned.
  • spring 35 is tensioned, and is capableof turning the diagram carrier support 18, and the shaft portions 23a, 25a with the pointers through gears 33, 21, 20, 19, 16, 17, 22, 23, 24, and 25 in the opposite direction than during driving by the drive means so that no play is left in the gear train between the drive means 4 and record carrier support 18 and the pointers, not shown.
  • the tension of spring 35 is opposite to the forward direction of rotation which is indicated by the arrows C in FIG. 2 which shows the gear 21 meshing with the gear 33 of the spring housing 31.
  • the pin 37 is secured to the top wall of the spring housing 31 and projects into an almost circular .slot 38 in a ratchet wheel 39.
  • Slot 38 and pin'37 constitute a lost-motion means connecting the spring housing 31 with the ratchet wheel 39.
  • Slot 38 has the form of a part-circular groove on the inner face of the top wall of spring housing 31, and extends almost over 360.
  • Ratchet wheel and spring housing 31 with the biasing gear 33 are both mounted for rotation on the stationary shaft 32 to which the inner end of spring 35 is secured.
  • a stationary journal 41 on wall 2 supports an escapement pawl 42 with two teeth 43 and 44 for angular movement, which controls turning movement of ratchet wheel 39, and permits the ratchet wheel to turn only in the forward direction indicated by the arrow B.
  • the spring housing 31 is coupled by'the lost-motion means 37, 38 with the blocking ratchet wheel 39, and the same turns also in the direction B with pawl 42 performing an oscillating movement since pawl 42 is displaced by each tooth of the blocking wheel 39.
  • the tension of spiral spring 35 acts on spring housing 31 and biasing gear 33 on gear 21, and consequently on all gears between gear 21 and the diagram carrier support 18 and shaft portions 231:, 25a, to turn in the rearward direction of the arrow C so that the play introduced into the gear train by the setting operation is eliminated so that the diagram carrier support 18 and the pointers can be driven from the drive means 4 without play.
  • the transmission ratio between the gear 21 and the spring housing 31 .with gear 33 is so selected that the diagram carrier support can be set almost one complete revolution in the rearward direction, which means that the pointers can be turned almost two complete revolutions, since the ratio between the diagram carrier support 18 and the hour pointer is 2:1.
  • This situation will practically never occur, since it is customary to set pointers in such a manner that the shortest angular displacement is used.
  • it will be preferred to turn the pointer in forward direction to the indication 5 o'clock which is less than 180, to turning the pointer in the rearward direction to the position which requires turning of more than 180.
  • the apparatus of the invention permits a rearward turning through almost one complete revolution before the setting means is blocked, and that is sufficient to assure a foolproof operation.
  • the present invention provides an apparatus which permits setting in forward and rearward direction, without completely exhausting the spring force required for eliminating play introduced into the gear train during a setting operation.
  • Play-eliminating setting apparatus comprising drive means; rotary means; a gear train connecting said drive means with said rotary means for turning the same always in the same forward direction so that no play is efi'ective in said forward direction; setting means connected with said rotary means for turning the same in said forward direction, and also in rearward direction whereby play is introduced into said gear train during setting of said rotary means in said forward direction only; rotary biasing means operatively connected with said gear train so as to be loaded during rotation of said rotary means in said forward direction and being gradually untensioned during rearward setting; one-way blocking means for blocking rotation only in said rearward direction; and lost-motion means between said blocking means and said biasing blocking means blocks said biasing means and thereby said gear train and said setting means so that complete untensioning of said biasing means by continued rearward setting is prevented.
  • said one-way blocking means include a rotary ratchet wheel, and an escapement pawl cooperating with said ratchet wheel.
  • said lost-motion means includes a part-circular slot, wherein the ends of said slot are said abutment means, and are spaced from each other an angle of at least and wherein said stop is a pin located in said slot.
  • said one-way blocking means include a rotary ratchet wheel, and an escapement pawl cooperating with said ratchet wheel and blocking movement of the same only in said rearward direction; wherein said ratchet wheel is formed with a part-circular slot having ends forming said abutment means; wherein said stop is a pin in said slot; and wherein said biasing means include a biasing gear meshing with said gear train and carrying said pin.
  • said biasing means include a rotary spring housing wheel having an outer biasing gear meshing with said gear train and an inner friction surface, and a spiral spring in said spring housing wheel having an inner fixed end and an outer end slidingly engaging said friction surface so that said spiral spring is tensioned during rotation of said gear train and of said rotary means with said spring housing wheel in said forward direction, and untensioned during rotation in said rearward direction; and wherein said lost-motion means connects said spring housing wheel and biasing gear with said one-way blocking means.
  • said blocking means includes a rotary ratchet wheel, and an cscapement pawl cooperating with said ratchet wheel and blocking movement of the same only in said rearward direction; comprising a shaft supporting said spring housing wheel, biasing gear, and ratchet wheel for rotation about a common axis, and being secured to said spiral spring; and wherein said lost-motion means include a part-circular slot in one of said wheels concentric with the axis of said shaft and having said abutment means, said stop being a pin secured to the other of said wheels and coupling in one end position at one end of said slot said wheels for turning movement so that rearward rotation of said other wheel is blocked in said end position.
  • Apparatus as claimed in claim 8 wherein said one wheel is said ratchet wheel and is formed with said slot; wherein said other wheel is said spring housing wheel; and wherein said slot extends in said ratchet wheel over an arc greater than 180 and less than 360.
  • said rotary means include a rotary diagram carrier and a rotary pointer; wherein said gear train includes a first branch gear train connecting said drive means with said diagram carrier, and a second branch gear train connecting said drive means with said rotary pointer; wherein said setting means includes a setting gear meshing with said second branch gear train; and wherein said biasing gear meshes with said first branch gear train.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Gear Transmission (AREA)
  • Gears, Cams (AREA)
  • Recording Measured Values (AREA)
  • Advancing Webs (AREA)
US84060A 1969-10-24 1970-10-26 Play-eliminating setting apparatus Expired - Lifetime US3636790A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE6941650U DE6941650U (de) 1969-10-24 1969-10-24 Anordnung an antriebswerken fuer aufzeichnungstraeger

Publications (1)

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US3636790A true US3636790A (en) 1972-01-25

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ID=6605952

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Application Number Title Priority Date Filing Date
US84060A Expired - Lifetime US3636790A (en) 1969-10-24 1970-10-26 Play-eliminating setting apparatus

Country Status (6)

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US (1) US3636790A (ja)
JP (1) JPS4920237B1 (ja)
CH (2) CH1497670A4 (ja)
DE (1) DE6941650U (ja)
FR (1) FR2066339A5 (ja)
GB (1) GB1287496A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945258A (en) * 1973-06-28 1976-03-23 Kabushiki Kaisha Mitutoyo Seisakusho Dial gauge measuring the length in two different units
US6825574B1 (en) * 2002-09-13 2004-11-30 Jon Mooring Spring motor powered electricity generation system actuated by reciprocating natural forces

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2333693C2 (de) * 1973-07-03 1983-03-17 Moto Meter Ag, 7250 Leonberg Vorrichtung zur Beseitigung des beim Einstellen von Zeitlaufwerken, insbesondere in Fahrtschreibern, entstehenden Zahnspiels
JPS5134136U (ja) * 1974-09-06 1976-03-13
DE2448358C2 (de) * 1974-10-10 1982-12-09 Moto Meter Gmbh, 7250 Leonberg Vorrichtung zur Beseitigung des beim Einstellen von Zeitlaufwerken, insbesondere in Fahrtschreibern, entstehenden Zahnspiels
JPS5163316U (ja) * 1974-11-11 1976-05-19
JPS53126144U (ja) * 1977-03-11 1978-10-06
JPS5479640U (ja) * 1977-11-15 1979-06-06
JPS5562420U (ja) * 1978-10-24 1980-04-28
JPS5591717U (ja) * 1978-12-19 1980-06-25
JPS5689546A (en) * 1979-12-21 1981-07-20 Inoue Mtp Kk Heat insulator
JPS59155035A (ja) * 1983-02-10 1984-09-04 藤倉ゴム工業株式会社 断熱性防水布
DE3809577A1 (de) * 1988-03-22 1989-10-12 Messerschmitt Boelkow Blohm Mechanisches getriebe
JPH02145520U (ja) * 1989-05-15 1990-12-11
JPH0383118U (ja) * 1989-12-15 1991-08-23
JP2646946B2 (ja) * 1992-12-02 1997-08-27 セイコーエプソン株式会社 時 計
DE29715630U1 (de) * 1997-08-30 1997-10-30 Mannesmann VDO AG, 60326 Frankfurt Federhaus für eine im Laufwerk eines Fahrtschreibers dem Zahnspielausgleich dienende Schleppfeder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945258A (en) * 1973-06-28 1976-03-23 Kabushiki Kaisha Mitutoyo Seisakusho Dial gauge measuring the length in two different units
US6825574B1 (en) * 2002-09-13 2004-11-30 Jon Mooring Spring motor powered electricity generation system actuated by reciprocating natural forces

Also Published As

Publication number Publication date
FR2066339A5 (ja) 1971-08-06
DE6941650U (de) 1970-01-29
CH531205A (de) 1972-08-15
CH1497670A4 (ja) 1972-08-15
JPS4920237B1 (ja) 1974-05-23
GB1287496A (en) 1972-08-31

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