US3482752A - Apparatus for two-directional feed of perforated tapes - Google Patents

Apparatus for two-directional feed of perforated tapes Download PDF

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Publication number
US3482752A
US3482752A US700456A US3482752DA US3482752A US 3482752 A US3482752 A US 3482752A US 700456 A US700456 A US 700456A US 3482752D A US3482752D A US 3482752DA US 3482752 A US3482752 A US 3482752A
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US
United States
Prior art keywords
tape
gear
levers
milliseconds
advancing
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
US700456A
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English (en)
Inventor
Gunther Vorbach
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.)
Siemens AG
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Siemens AG
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Filing date
Publication date
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Publication of US3482752A publication Critical patent/US3482752A/en
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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K13/00—Conveying record carriers from one station to another, e.g. from stack to punching mechanism
    • G06K13/18—Conveying record carriers from one station to another, e.g. from stack to punching mechanism the record carrier being longitudinally extended, e.g. punched tape
    • G06K13/26—Winding-up or unwinding of record carriers; Driving of record carriers
    • G06K13/30—Winding-up or unwinding of record carriers; Driving of record carriers intermittently

Definitions

  • a mechanism shifts the gear back and forth in the forward and reverse directions and the direction of tape feed is determined by the interval during which the gear is engaged and disengaged.
  • the shifting mechanism includes two cams mounted on a drive shaft and transposed with respect to their angular position. The cams act on associated shift levers to coordinate the timing of the forward and reverse movements of the gear with the engagement and disengagement of the gear. One or the other of the two levers is rendered inoperative by a blocking mechanism to determine whether the feed of the tape is in the forward or reverse directions.
  • the invention relates to an apparatus for feeding perforation tapes in either a forward or reverse direction and includes a tape advancing gear which is mounted for cyclical engagement and disengagement with the perforations of the tape.
  • a first lever is provided for advancing the tape advancing gear in a forward direction when the tape advancing gear is in engagement with the tape; and a second lever is provided for advancing the tape advancing gear in a forward direction when the tape advancing gear is disengaged from the tape.
  • the tape advancing gear is biased in a direction opposite to the advancement imparted thereto by the levers to return the tape advancing gear after each cycle.
  • the first and second levers are normally biased toward an operative position with respect to the tape advancing gear and facilities are provided for blocking one or the other of the levers to render one of the levers inoperative during each feeding cycle.
  • a drive shaft having two spaced cams which are transposed with respect to their angular position is provided to alternately urge the levers away from said tape advancing gear.
  • Facilities are provided for controlling the b ocking device to determine which of the levers is rendered inoperative and thereby control whether the tape is advanced in a forward or a reverse direction.
  • FIG. 1 is a perspective view showing an apparatus for two directional feed of a perforated tape in conjunction with a perforation device
  • FIG. 2 is a time-motion diagram showing the relative movement with respect to time of the various mechanical and electrical elements disclosed in FIG. 1.
  • FIG. 1 there is schematically shown a perforation device 1 for eight-code perforation tape or corresponding perforation tape cards.
  • the feed system for advancing a tape 33 is controlled by a shaft 2 in association with the various cooperating elements which will hereafter be described in detail.
  • the shaft 2 is coupled for start-stop operation every one-half revolution (30 milliseconds) by a drive mechanism (not shown) in a counter-clockwise direction (FIG. 1).
  • a drive mechanism (not shown) in a counter-clockwise direction (FIG. 1).
  • a cam 3 mounted on the shaft 2.
  • the cam 3 acts against a roller 4 which is mounted on a rail 7 which rotates around a stationary axis 6.
  • a tension spring 5 normally urges the rail 7 in a counter-clockwise direction (FIG. 1) to urge the tape advancing gear 8 into engagement with the perforations of the tape.
  • the cam 3 is effective to disengage the gear 8 cyclically during the return stroke of the gear.
  • the tape advancing gear 8 is rotatable around an axis 9 which is also mounted on the rail 7.
  • the upper end portion 8a of the tape advancing gear 8 is controlled by two limit stops 10 and 11.
  • the positioning of the limit stops 10 and 11 can be adjusted by rotation of eccentric supports 36 and 37, respectively.
  • a torsion spring 12 normally urges the tape advancing gear 8 to the right toward limit stop 10, insofar as the gear 8 is not influenced by other forces.
  • the tape advancing gear 8 includes at its lower end a pressure plate 812 which cooperates with two control levers 14 and 15 mounted on an axis 13.
  • the control levers 14 and 15 are provided with rollers 16 and 17, respectively, which are operated by cams 18 and 19, respectively, affixed to the shaft 2.
  • the earns 18 and 19 are transposed with respect to each other in their angular position and are shaped differently.
  • the control levers 14 and 15 are each biased in a counterclockwise direction (FIG. 1) by tension springs 20 and 21, respectively.
  • control levers 14 and 15 must be coordinated so that only one or the other is operative at a given time or for a given cycle.
  • the control lever 14 when operative, advances the tape 33 in a forward direction
  • a double acting magnetic system 23 having an armature 22 and a blade or tongue 24 is effective to render one of the control levers 14 and 15 operative while rendering the other inoperative.
  • the blade 24 is fixedly connected to the armature 22 and is movable between two stationary limit stops 26 and 27 while resting on a support 25.
  • a dead center spring 30 on a stationary support 29 which is located in such a way that a connecting line runs between the support and a rotary bolt 28 approximately centered between the limit stops 26 and 27. This provides for a short mechanical switching time of only about 0.5 to 1 millisecond. This short period of time results from the double acting magnetic system which has a very small load.
  • the control levers 14 and 15 sense the position of the armature blade 24 with their arms (unnumbered) so that in each case one of the control levers can descend while the other supports itself on the blade 24.
  • a set of spring contacts 32 is operated by an additional cam 31 which is mounted on the shaft 2.
  • the spring contact 32 effectuates the energization of the magnet 23 in cooperation with the approaching of the right angle position of the shaft 2.
  • the tension springs 20 and 21 as well as the torsion spring 12 are designed in the enample being described for a tape or card advancing of 100 grams.
  • the system is designed so that an advancement of the tape in a reverse direction can be rapidly elfectuated.
  • This high speed reversal is very advantageous when combined with an error scanning device 38, of known design.
  • the error scanning device 38 is electrically connected to the spring contacts 32 in order to send a reverse signal to the magnet 23 upon any error in perforation. In this way the error scanning device 38 is operable to reverse the direction of feed in the next perforation cycle after sensing an error.
  • the perforation stamping commences (see line a) whereby the perforation tape 33 is grasped at least by a perforator stamp 34 for the perforation feeding. This occurs for a period of 15 milliseconds, i.e., until 18 milliseconds after the initiation of the coupling of the perforator shaft 2.
  • the error scanning device 38 for scanning the last perforated row in the adjacent perforation row.
  • the error scanning device 38 is associated with the perforation means 1 for the purpose of supervision. More particularly, it is possible within the framework of the subject apparatus to carry out the supervisory scanning within the range of 2730 milliseconds on the diagram of FIG. 2. In FIG. 2 in line a it is shown in broken lines that the scanning can take place, for example, at 29 milliseconds of the diagram.
  • a return command can be emitted by the error scanning device 38 which will lead to the initiation of a reverse feed during the immediately following perforation cycle. Thus, no additional time is needed for the change in the feeding direction.
  • Apparatus for two directional feed of perforated tape which comprises:
  • a tape advancing gear (8) mounted for engagement and disengagement in the perforations of the tape; means (3, 4, 7) for cyclically engaging and disengaging said gear in said tape perforations;
  • a drive shaft (2) having two spaced cams (18, 19) mounted thereon, said cams being transposed with respect to their angular position and said cams being designed to alternately urge said levers away from said gear;
  • lever biasing means (20, 21) comprises tension springs and said gear biasing means (12) comprises a torsion spring having approximately one-half the strentgh of said lever biasing means.
  • said electromagnet further includes:
  • a first limit stop (10) for limiting the movement of the gear (8) by said gear biasing means (12);
  • error scanning means (38) for sensing an error in perforations, said means being connected to said means (32) for supplying electric pulses to said electromagnet and being operable to reverse the direction of feed of the perforated tape during the next succeeding perforation cycle upon the sensing of an error.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Advancing Webs (AREA)
  • Punching Or Piercing (AREA)
US700456A 1967-02-01 1968-01-25 Apparatus for two-directional feed of perforated tapes Expired - Lifetime US3482752A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0108115 1967-02-01

Publications (1)

Publication Number Publication Date
US3482752A true US3482752A (en) 1969-12-09

Family

ID=7528582

Family Applications (1)

Application Number Title Priority Date Filing Date
US700456A Expired - Lifetime US3482752A (en) 1967-02-01 1968-01-25 Apparatus for two-directional feed of perforated tapes

Country Status (9)

Country Link
US (1) US3482752A (de)
BE (1) BE710207A (de)
CH (1) CH469310A (de)
DE (1) DE1549848A1 (de)
DK (1) DK123895B (de)
FR (1) FR1552569A (de)
GB (1) GB1147315A (de)
NL (1) NL6800800A (de)
SE (1) SE346640B (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933931A (en) * 1958-12-30 1960-04-26 Ibm Intermittent drive mechanism
US3292832A (en) * 1964-07-14 1966-12-20 Ohr Tronics Inc Bi-directional stepping mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933931A (en) * 1958-12-30 1960-04-26 Ibm Intermittent drive mechanism
US3292832A (en) * 1964-07-14 1966-12-20 Ohr Tronics Inc Bi-directional stepping mechanism

Also Published As

Publication number Publication date
DE1549848A1 (de) 1970-12-17
BE710207A (de) 1968-08-01
SE346640B (de) 1972-07-10
CH469310A (de) 1969-02-28
FR1552569A (de) 1969-01-03
NL6800800A (de) 1968-08-02
DK123895B (da) 1972-08-14
GB1147315A (en) 1969-04-02

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