US3586150A - Tabulator safety apparatus - Google Patents

Tabulator safety apparatus Download PDF

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Publication number
US3586150A
US3586150A US772349A US3586150DA US3586150A US 3586150 A US3586150 A US 3586150A US 772349 A US772349 A US 772349A US 3586150D A US3586150D A US 3586150DA US 3586150 A US3586150 A US 3586150A
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US
United States
Prior art keywords
tabulator
carriage
stop
holder
stop member
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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
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US772349A
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English (en)
Inventor
Ivar Holtklint
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FACIT HALDA AB
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FACIT HALDA AB
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Filing date
Publication date
Application filed by FACIT HALDA AB filed Critical FACIT HALDA AB
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Publication of US3586150A publication Critical patent/US3586150A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J21/00—Column, tabular or like printing arrangements; Means for centralising short lines
    • B41J21/14—Column, tabular or like printing arrangements; Means for centralising short lines characterised by denominational arrangements

Definitions

  • ABSTRACT A tabulator safety apparatus for use with typewriters, calculating machines, accounting machines or the like having a movable motor operated carriage, to prevent the movable carriage from being halted when the tabulator set key is depressed during carriage travel or when the tabulator key is depressed during the return travel of the carriage including a holder having at least one tabulation stop member disposed therein or coacting with a tabulator stop in stopping position, said holder being movable against a spring in a carriage return direction, said stop member being movable between an position and a nonoperative position, a link mechanism cooperating with said holder and transferring said holder movement to said stop member whereby said holder movement in said carriage return direction moves said stop member to said nonoperative position, and a swinging are having a setting stud for said tabulator stops for engaging said tabulator stops, said stud being laterally moveable against the action of at least one return spring and cooperating with recesses and guide pins to transform the lateral movement of said tabulator stop into
  • TABULATOR SAFETY APPARATUS This invention relates to an arrangement adapted on tabulators for typewriters, calculating machines, accounting machines or the like comprising a movable motor-operated carriage, to prevent the movable carriage from being stopped when the setting key of the tabulator is depressed during the travel of the carriage or when a tabulator key is depressed during the return travel of the carriage.
  • the tabulator means can become unfit for use when the setting key for the tabulator is depressed while the carriage is performing a return or tabulating travel, due to the fact, that a stud, which is adapted upon depression of the setting key (carriage not in motion) to move a stop member in a row of such stop members for the tabulator to stop position, thereby so engages between adjacent stop members, that the carriage travel is stopped.
  • the stop member or the setting stud is deformed and, respectively, in connection with the return travel of the carriage the coupling for this travel slips and thereby is subjected to rapid wear.
  • the key for the carriage return travel or the tabulator keys can be arranged so as to be locked in depressed position until the operation in question has been completed.
  • the key actuates in this position a system of clappers or balls which prevents more than one key from being depressed at a time.
  • Such an arrangement is relatively large and expensive and, therefore, it is applied substantially only when absolutely necessary.
  • This solution moreover, renders it impossible to interrupt the return travel of the carriage by depressing a tabulator key, by which method time can be saved when it is not intended to start typing at the beginning of a line, but for example at its center, in which case one interrupts the carriage return travel in said manner immediately after the carriage has moved past the tabulator stop position where the typing is intended to start.
  • this stop function instead, is carried out during a return travel of the carriage, which travel although it is going to be interrupted has not yet come to an end and the carriage still is moving in a direction opposite to that at tabulation, the coupling for the carriage return travel or the stop means can be damaged, because the two corresponding functions thereby will counteract one another.
  • the arrangement according to the invention comprises a holder adapted against the action of a spring to move in the carriage return direction, in which holder is provided a stop member for tabulator stops in stop position, which stop member is movable in the direction to and from nonoperative position, and a link mechanism or the like which transfers the holder movement to the stop member, in such a manner, that the holder movement in the return travel direction of the carriage effects movement of the stop member to nonoperative position, and that, furthermore, the setting key of the tabulator actuates a swinging arm, which is provided with a setting stud for the tabulator stops, which stud is laterally movable against the action of at least one return spring and at which stud the lateral movement by means of cooperating recesses and guide pins or the like is transformed into a movement disengaging the stud from the tabulator stop.
  • FIG. I shows in a perspective way the tabulator means.
  • FIG. 2 shows in a perspective way the setting means.
  • FIG. 3 shows in a front view the setting lever.
  • FIG. 4 shows in a perspective way the stop arrangement with its parts in disassembled state.
  • a swinging arm 2 movably mounted on a shaft 3 is so actuated via a link 1, see FIG. 2, that the arm 2 swings in clockwise direction.
  • a setting stud 4 is mounted on two guide pins 5 and 6 through a groove 4 a cooperating with the guide pin 6 and through a heart-shaped hole 4b cooperating with the guide pin 5.
  • the guide pin 6 further is formed as a spring mounting, and a tension spring 7 between the pin 6 and a bent portion 4c on the setting stud 4 keeps the latter in an upper position.
  • the tabulator stop 8 is pivotally mounted on a shaft 10 and retained in one or the other of two definite positions by a spring means 11 comprising a comblike slotted plate of thin spring steel where every comb tooth 11a presses against a tabulator stop 8.
  • Said tabulator stop 8 is provided with two recesses 8a and 8b through which the comb tooth 11a fixes both positions of the tabulator stop 8, in such a manner, that the recess 8a corresponds to the nonoperative position of the tabulator stop 8, and recess 8b corresponds to the stop position, i.e. the stop 8 can stop the carriage against a stop member 12 in the stationary part of the machine (FIG. 4).
  • Atabulator stop 8 is moved from its nonoperative position to its stop position.
  • the bent portion 4d of the setting stud 4 is caused to engage between the two tabulator stops on either side of the actuated tabulator stop 8. If the carriage is traveling, or if the carriage is caused to travel, for example in connection with carriage return or tabulation, the setting stud 4 will stop the carriage whereby the coupling for the carriage return travel can be destroyed and whereby it may also happen, that the setting stud 4 or the tabulator stop struck by the setting stud 4 are deformed. For preventing damage, the setting stud 4 is suspended and so formed that it can move aside and get out of the engagement with the tabulator stops remaining in the nonoperative position.
  • the link 19 is threaded into a hole on a bent portion 160 of the lever 16 in such a way, that upon a swinging motion of the lever [6 in clockwise direction the bridge 20 is actuated directly, but that upon a swinging motion of the lever 16 in counterclockwise direction the link 19 slides in the hole on the bent portion 16a so that the bridge 20 is not actuated thereby.
  • a tabulator apparatus for use with typewriters and the like having a movable motor operable carriage for preventing the movable carriage from being stopped when a tabulator setting key is depressed during carriage travel or by activation of a tabulator key during carriage return travel, the improvement comprising a holder biased against a spring to move in carriage return direction, said holder having at least one tabulation stop member disposed therein for engagement with a tabulator stop instopped position, said stop member being movable between an operative position and a nonoperative position, a link mechanism cooperating with said holder and transferring said holder movement to said stop member whereby said holder movement in said carriage return direction moves said stop member to said nonoperative position, said setting key of said tabulator actuating a swinging arm having a setting stud for said tabulator stops, said stud having a heart-shaped aperture disposed therein and being laterally movable against the action of at least one return spring and cooperating with recesses and guide pins for transforming said lateral movement

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  • Accessory Devices And Overall Control Thereof (AREA)
US772349A 1967-11-02 1968-10-31 Tabulator safety apparatus Expired - Lifetime US3586150A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE15037/67A SE304022B (en)) 1967-11-02 1967-11-02

Publications (1)

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US3586150A true US3586150A (en) 1971-06-22

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Application Number Title Priority Date Filing Date
US772349A Expired - Lifetime US3586150A (en) 1967-11-02 1968-10-31 Tabulator safety apparatus

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US (1) US3586150A (en))
BR (1) BR6803636D0 (en))
DE (1) DE1806265A1 (en))
FR (1) FR1590417A (en))
GB (1) GB1238707A (en))
SE (1) SE304022B (en))

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3871508A (en) * 1973-03-21 1975-03-18 Facit Halda Aktiebolag Tabular device for an office machine
US3876054A (en) * 1973-02-16 1975-04-08 Litton Business Systems Inc Typewriter carriage jam precluding and action jam release mechanisms

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3876054A (en) * 1973-02-16 1975-04-08 Litton Business Systems Inc Typewriter carriage jam precluding and action jam release mechanisms
US3871508A (en) * 1973-03-21 1975-03-18 Facit Halda Aktiebolag Tabular device for an office machine

Also Published As

Publication number Publication date
DE1806265A1 (de) 1969-06-26
SE304022B (en)) 1968-09-16
BR6803636D0 (pt) 1973-01-18
GB1238707A (en)) 1971-07-07
FR1590417A (en)) 1970-04-13

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