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US3433345A - Line-spacing apparatus - Google Patents

Line-spacing apparatus Download PDF

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Publication number
US3433345A
US3433345A US543605A US3433345DA US3433345A US 3433345 A US3433345 A US 3433345A US 543605 A US543605 A US 543605A US 3433345D A US3433345D A US 3433345DA US 3433345 A US3433345 A US 3433345A
Authority
US
United States
Prior art keywords
line
ratchet wheel
spacing
pawl
rocker arm
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
US543605A
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English (en)
Inventor
Heinz Gaissert
Johannes Hiller
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US3433345A publication Critical patent/US3433345A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
    • H04L13/18—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00 of receivers
    • H04L13/186—Page printing; tabulating

Definitions

  • the present invention relates to a line-spacing mechanism for high speed printing telegraph apparatus.
  • the line traversing motion is adjusted by varying the lever ratios of a feed pawl which, at normal, is disengaged from the ratchet wheel, and is limited by means of a stationary limit stop locking the feed pawl to the ratchet wheel.
  • a line-spacing mechanism in which, by the adjustment of a roller lever, a feed pawl, motion includes a large idle stroke before coming into engagement with the ratchet wheel. At the end of this stroke or length of travel, the feed pawl contacts a stationary limit stop, and there is effected a latching in the forward or feed direction between the feed pawl and the ratchet wheel without excessive sideslip.
  • This arrangement has a disadvantage in that the pawl, because of the idle stroke, suddenly comes into engagement with the ratchet wheel causing increased wear and unnecessary noise, and only utilizes the full length of travel of the operating stroke for maximum line spacing.
  • Another arrangement for effecting a line-traversing motion overcomes the disadvantages of an idle stroke by a feed pawl which is continuously in engagement with the ratchet wheel permitting the adjustment of the line-traversing motion by varying the lever ratios in each setting so that the entire stroke is utilized.
  • this arrangement does not prevent excessive line-spacing because different stop limit positions of the pawl are assigned to the different traversing motion positions.
  • the pawl is continuously in engagement with the ratchet wheel and prevents turning back of the platen by hand until after it has been lifted.
  • the line-spacing mechanism wherein a lifted pawl, in the normal position, permits a continuous maximum utilization of the length of travel, and provides that the intended line traversing motion is exactly adhered to. Accordingly, the variation of the lever ratio determining the degree of line-spacing is linked to a concentrical adjustment of the feed pawl corresponding to the line traversing motion which results, in respect to the defined end position, that the feed pawl, in co-operation with a stationary catch pawl, establishes a positive- 3,433,345 Patented Mar. 18, 1969 locking connection between the ratchet wheel and the stationary parts of the apparatus during the time of direction reversal.
  • FIG. 1 in a perspective representation, shows the embodiment of a line-spacing mechanism according to the invention
  • FIG. 1a shows the lower part of the pull strap, which is partly shown in FIG. 1, and the associated actuating mechanism
  • FIGS. 2a and 2b schematically show the line-spacing mechanism of FIG. 1, both in a normal condition and at the time when the pawl reaches its end position.
  • FIGURE 1 there is shown part of the machine frame 1 through which shaft 2 of the platen 3 and shaft 5 of the paper pressure rollers 4 are mounted. Both the shaft 2 and the shaft 5 project through the frame portion 1 as shown and mount the most substantial portions of the line-spacing mechanism.
  • a ratchet wheel 7 is firmly arranged, followed by a freely rotatable adjusting bracket 11 between which a function rocker arm 9 is also pivoted in a freely rotatable manner.
  • a knurled turning button 6 is firmly secured on the end of shaft 2 for manual line adjustment.
  • a hand lever 17 is both pivotally and slidably mounted on shaft 5 at two points in a straplike manner extending around the frame portion 1 as shown.
  • a catch pawl 20 and an index lever 18 are pivotally mounted between the end of the shaft 5 and the wall of the frame 1, in alignment with the ratchet wheel 7, are pivotally mounted a catch pawl 20 and an index lever 18.
  • a spring 22 is biased to force hand lever 17 against the inside of the frame portion 1 adjacent the platen 3.
  • the hand lever 17 is used for manual setting of the distances between the lines in accordance with the numerical markings 1a corresponding to the engaging holes 1b in the frame portion 1.
  • the hand lever 17, via its engaging bolt 17a, is engaged in a selected adjusting position as shown.
  • a pin 17b on hand lever 17 engages a slot 14b to determine the position of roller 14a of pull strap 14 on function arm 90, and the pull strap 14 thereby transfers the machine line-spacing travel to rocker arm 9.
  • pull strap 14 is pivotally connected to a pull lever 15 by a bolt 15a which, upon actuation of the line-spacing function, always traverse the angle h.
  • the hand lever 17 is also in a positive locking connection with the adjusting bracket 11 by a pin 17c and slot 11b.
  • the bracket 11 is capable of being adjusted in several positions by the hand lever 17, and the bracket 11 is provided with a limit stop bolt 11a which provides a counter support for the function rocker arm 9 when the arm is in its normal position and under the action of a spring 19.
  • the adjusting bracket 11 has in alignment with the feed pawl 8 an inclined ramp member 12.
  • the feed pawl 8 is pivotally arranged on the arm 9a of the function rocker arm 9. In its normal position and in opposition to the action of a spring 8a, pawl 8 is retained out of engagement with the ratchet wheel 7 by ramp member 12.
  • a limit stop 10 on the frame portion 1 is used for the stroke-or travellimiting of the pawl 8 and the ratchet wheel 7 so as to avoid excessive line-spacing effects. Therefore, at the end of the line-spacing motion, feed pawl 8 establishes positive contact with limit stop 10, so that the stationary parts of the apparatus absorb the kinetic energy stored in the platen 3 to prevent any extra line-spacing.
  • the function rocker arm 9 includes a guide bushing 9a which is freely rotatable on the shaft 2, and, on the side facing the ratchet wheel 7, a double lever consisting of a pawl arm 9a and of a lifting arm 9b, and, on the opposite side, a function arm 90.
  • the lifting arm 9b is angled off at its end.
  • the catch pawl 20 by its pin 20a is retained in the normal position of the function rocker arm 9 and, during a certain period of each line-space travel, is retained out of engagement with the ratchet wheel 7.
  • a spring 19 engages the lifting arm 9b and, by being oppositely suspended on the index lever 18, simultaneously also serves to effect the spring action of the index lever 18 against the ratchet wheel 7.
  • the pull strap 14 acts upon the line spacing apparatus.
  • the function arm 90 is provided with a smooth sliding surface extending slantingly in direction to the pull direction and corresponding to the angle 12 traversed by lever 15. Both the inclined position and the sliding surface are chosen so that in the case of a pulled strap 14 (FIG. 2b) the slide surface profile at the point of contact with the roller 14a will always lie on the circular are determined by the pivotal movement of strap 14 about its pivot 150.
  • This sliding surface may be designed in a straight-lined fashion whenever the pull strap 14 has a predetermined minimum length.
  • the adjusting bracket 11 by means of pin 17c and slot 11b, is adjusted and causes the function rocker arm 9 which is biased by spring 19 to press against the limit stop 11a, Due to the adjustment of the function rocker arm 9, the pawl 8 is caused to follow the inclined ramp member 12 mounted on the bracket 11 and its position is chosen so that the platen 3 can be freely turned backwards and forwards by hand, but the idle stroke is as small as possible.
  • the engaging positions of the hand lever 17 result from the adjusting positions of the adjusting bracket 11 which are adapted to the tooth pitches of the ratchet wheel 7.
  • the adjusting angles are set to one or a multiple of one tooth pitch of the ratchet wheel 7.
  • the indexing lever 18 which, under the effect of the springs 19, 20b and its engaging member 18a, is vertically adjustable and is in continuous engagement with the ratdhet Wheel 7.
  • the setting for a double line-spacing operation is indicated in solid lines, Whereas the settings for a one-line and a one-and-a-halfline spacing are indicated by the dot-and dash-lines.
  • the feed p awl 8 due to the support of the inclined ramp member 12 and the function rocker arm 9 being against the limit stop 11a, is kept out of engagement with the ratchet wheel 7 until there is effected the line spacing motion by the actuation of pull strap 14 by the pull lever 15.
  • the pull strap 14 acts upon the function arm 90 via the slide roller 14a, and causes a swivelling of the function rocker arm 9 in the clockwise direction.
  • the feed pawl 8 is pulled along therewith and slides off the inclined ramp member 12 which remains in its position, and comes into engagement with the ratchet wheel 7.
  • the ratchet wheel 7 is taken along an angular path resulting from both the effective lever length, as determined by the point of engagement of the slide roller 14a with the function arm 90, and angle h.
  • FIG. 2b shows the end position which is the same for all three settings, and in which the function arm with the profile of its sliding surface is lying on the circular are around the center of rotation of the pull strap extending through the point of contact between the slide roller 14a and the sliding surface of the function arm 90.
  • the line-spacing movement is limited by the latching action on the ratchet wheel 7 in the linetraversing direction and thereby prevents an excessively line-spacing.
  • the catch pawl 20 (not shown in FIGS. 2a and 2b) is released by the lifting arm 9b and the action of its spring 20b, and engages the ratchet wheel 7.
  • This catch pawl 20 is adjusted so that its pawl tooth, shortly before the feed pawl 8 has reached its final position, will engage behind a tooth of the ratchet wheel 7. This engaged position is retained by the catch pawl 20 during the rearward movement of the function rocker arm 9.
  • the ratchet wheel 7 and the platen 3 are, for the time of the direction reversal of the moving elements 8 and 9, in a positive locking connection with the machine frame 1 by means of the limit stop 10 and the catch pawl 20.
  • the ratchet wheel 7 and the platen 3 are, for the time of the direction reversal of the moving elements 8 and 9, in a positive locking connection with the machine frame 1 by means of the limit stop 10 and the catch pawl 20.
  • a line-spacing appartus comprising:
  • one wall of said frame having a plurality of engaging holes for determining the degree of line spacing
  • a platen attached to said first shaft and located on one side of said one wall;
  • a ratchet wheel mounted on said first shaft and located on the other side of said one wall;
  • a hand lever capable of being swiveled on said second shaft for engaging one of said plurality of holes for determining the degree of line spacing
  • a feed pawl pivotally arranged on said rocker arm for engaging said ratchet wheel
  • an adjusting bracket swivelly mounted on said first shaft, with a limit stop bolt which, in its normal condition, is in a force-locking connection with said rocker arm, and with an inclined ramp member to effect the lifting of said feed pawl, said adjusting bracket further including a slot guide which forms a positive locking connection with said hand lever, such that said adjusting bracket is capable of being adjusted in several positions by said hand lever;
  • a catch pawl mounted on said second shaft and positioned to engage said ratchet wheel
  • said means including a pull strap wherein the effective connection between said pull strap and rocker arm controls the engagement of said feed pawl with said ratchet wheel, such that, at the end of the line spacing function, there i is established a positive locking connection between the ratchet wheel and the machine frame.
  • Apparatus according to claim 4 further including an indexing lever, mounted on said second shaft and resiliently acting upon said ratchet wheel to fix the position of the platen during inoperative periods.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Handling Of Sheets (AREA)
  • Transmission Devices (AREA)
US543605A 1965-04-22 1966-04-19 Line-spacing apparatus Expired - Lifetime US3433345A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST23719A DE1223871B (de) 1965-04-22 1965-04-22 Zeilenschaltmechanik fuer Fernschreibmaschinen

Publications (1)

Publication Number Publication Date
US3433345A true US3433345A (en) 1969-03-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
US543605A Expired - Lifetime US3433345A (en) 1965-04-22 1966-04-19 Line-spacing apparatus

Country Status (4)

Country Link
US (1) US3433345A (de)
BE (1) BE679869A (de)
DE (1) DE1223871B (de)
NL (1) NL6605234A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4290355A (en) * 1978-05-18 1981-09-22 Henry Gross Ticket printing and advancing device
US4365904A (en) * 1981-04-14 1982-12-28 Scm Corporation Linespacing apparatus
US5159883A (en) * 1991-09-03 1992-11-03 Rosenberg Allen T Tripod table

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1561307B1 (de) * 1967-02-27 1970-11-05 Siemens Ag Vorrichtung fuer Schreib- und aehnliche Maschinen zum Rueckwaertsdrehen der Schreibwalze

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US345347A (en) * 1886-07-13 Thomas whalby
US832244A (en) * 1904-12-02 1906-10-02 Thomas L Dennis Type-writing machine.
US1243110A (en) * 1913-12-15 1917-10-16 Woodstock Typewriter Co Line-space mechanism.
US1360747A (en) * 1919-04-22 1920-11-30 Underwood Typewriter Co Typewriting-machine
US1672354A (en) * 1925-03-06 1928-06-05 Tyberg Oluf Power typewriter
US2303879A (en) * 1941-06-04 1942-12-01 Underwood Elliott Fisher Co Typewriting machine
US2453282A (en) * 1944-12-29 1948-11-09 Ibm Feeding mechanism for accounting machine carriage platens
US2775332A (en) * 1955-04-21 1956-12-25 Olympia Werke Ag Line space device for office typing machine
US2791311A (en) * 1955-11-25 1957-05-07 Underwood Corp Form feed mechanism for business machine
US2902134A (en) * 1957-11-15 1959-09-01 Monroe Calculating Machine Full stroke positive feed printing platen
US3263793A (en) * 1964-02-25 1966-08-02 Royal Typewriter Co Inc Platen indexing mechanism

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1860153U (de) * 1961-11-08 1962-10-18 Standard Elektrik Lorenz Ag Zeilenschaltvorrichtung fuer kraftangetriebene schreibmaschinen, insbesondere fernschreibmaschinen.

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US345347A (en) * 1886-07-13 Thomas whalby
US832244A (en) * 1904-12-02 1906-10-02 Thomas L Dennis Type-writing machine.
US1243110A (en) * 1913-12-15 1917-10-16 Woodstock Typewriter Co Line-space mechanism.
US1360747A (en) * 1919-04-22 1920-11-30 Underwood Typewriter Co Typewriting-machine
US1672354A (en) * 1925-03-06 1928-06-05 Tyberg Oluf Power typewriter
US2303879A (en) * 1941-06-04 1942-12-01 Underwood Elliott Fisher Co Typewriting machine
US2453282A (en) * 1944-12-29 1948-11-09 Ibm Feeding mechanism for accounting machine carriage platens
US2775332A (en) * 1955-04-21 1956-12-25 Olympia Werke Ag Line space device for office typing machine
US2791311A (en) * 1955-11-25 1957-05-07 Underwood Corp Form feed mechanism for business machine
US2902134A (en) * 1957-11-15 1959-09-01 Monroe Calculating Machine Full stroke positive feed printing platen
US3263793A (en) * 1964-02-25 1966-08-02 Royal Typewriter Co Inc Platen indexing mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4290355A (en) * 1978-05-18 1981-09-22 Henry Gross Ticket printing and advancing device
US4365904A (en) * 1981-04-14 1982-12-28 Scm Corporation Linespacing apparatus
US5159883A (en) * 1991-09-03 1992-11-03 Rosenberg Allen T Tripod table

Also Published As

Publication number Publication date
NL6605234A (de) 1966-10-24
DE1223871B (de) 1966-09-01
BE679869A (de) 1966-10-24

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