US2480165A - Alarm device for indicating failure of the paper feed mechanism in teleprinters - Google Patents

Alarm device for indicating failure of the paper feed mechanism in teleprinters Download PDF

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Publication number
US2480165A
US2480165A US589247A US58924745A US2480165A US 2480165 A US2480165 A US 2480165A US 589247 A US589247 A US 589247A US 58924745 A US58924745 A US 58924745A US 2480165 A US2480165 A US 2480165A
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US
United States
Prior art keywords
lever
tape
pawl
arm
paper
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
US589247A
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English (en)
Inventor
Salmon Reginald Dennis
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.)
Creed and Co Ltd
Original Assignee
Creed and Co Ltd
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 Creed and Co Ltd filed Critical Creed and Co Ltd
Priority claimed from GB18527/45A external-priority patent/GB596112A/en
Application granted granted Critical
Publication of US2480165A publication Critical patent/US2480165A/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
    • H04L13/02—Details not particular to receiver or transmitter
    • H04L13/06—Tape or page guiding or feeding devices

Definitions

  • This invention relates to paper feeding mechanism for feeding the tape in a teleprinter past the printing point and to alarm devices for indicatin failure of proper operation of said feeding mechanism.
  • an arrangement for a tape teleprinter comprises paper feeding mechanism and mechanically actuated means for closing alarm contacts in the event of failure of proper operation of said feeding mechanism.
  • the arrangement is thus one which acts positively and mechanically without recourse to time relays to give an alarm.
  • Fig. 1 is a view, with parts broken away, of the external portion of a frame on which part of the paper feeding and ink ribbon feeding and reversing mechanism for a tape teleprinter is mounted.
  • Fig. 2 is a view of the paper feeding mechanism including the alarm mechanism shown in relation to the teleprinter but with the supporting framework and cover omitted for the sake of clearness.
  • Figs. 3, 4, 5 and 6 are detail views illustrating the action of part of the mechanism.
  • Fig. 7 is a view of the ink ribbon and reversing mechanism, with the supporting frame omitted;
  • Fig. 8 shows the mounting frame of Fig. 1
  • a typewheel I carrying type segments adapted to be struck forward perpendicularly to the plane of the typewheel, as described in British specification No. 311,684 is fixed to a horizontal shaft 2 Fig. 2.
  • the shaft 2 is rotated by a motor (not shown) through a friction clutch and stopped in the position required for printing by engagement of an arm 3 fixed to the shaft 2 with a selector bar 4.
  • a plurality of such selector bars is arranged around the periphery of a set of comb discs 5 and these comb discs are moved selectively to present a series of aligned notches to a required selector bar 4 to allow said selector bar to move into the path of the arm 3.
  • the link I is moved longitudinally by a cam (not shown) from a normal position first in one direction and then back to and beyond the normal position and finally returned in the same direction as the first movement back to normal position.
  • the paper tape I4 passes from a tape roll (not.
  • the fixed plate I6 is fixed to the e t rior of the cover 8.
  • the moveableplate I5 protrudes through an aperture in the cover 8 and is fixed on an arm 20 of a lever 2I pivoted below the cover at 22.
  • a spring 23 serves to hold the plat I5 gripping the tape I4 against the fixed plate I6 and also holds an arm 24 of leverj2'I against a pin 25 fixed to an arm 26 of a lever 21 ivoted at 28.
  • a pin 29 on the arm 26 fits into an aperture in link I and serves to pivot the arm 26 to the link I.
  • a bell crank lever 30 is pivoted at 3I on the interior of th frame l and is held by a spring 32 Fig. '7 in engagementwith the pin29.
  • a pawl 35 is pivoted at the end of one arm of bell crank lever 30 and is held by a spring 34 against a stop 35.
  • a three armed lever 36 is also pivoted at 3
  • Th pawl 39 acts on a ratchet wheel 45 fixed to a spindle 4I j'ournalled in the frame I 0 carrying the feed roller I9.
  • the third arm of the three armed lever 35 carries, pivoted thereto a trip arm 42 held by a spring 43 against a pin 44.
  • the pin 44 is fixed to a lever 45 pivoted at 46 to the frame I0 and carrying the roller 11 which protrudes through an aperture in the frame III to the exterior thereof.
  • a spring 41 tends to rotate lever 45 in a clockwise direction but the tension of the paper tape round the roller II rotates it in a counter clockwise. direction against the spring 41 thus causing pin 44. to hold trip arm 42 clear of a latch 48, as shown in Fig. 3.
  • the latch 48 is held by a spring 48a tending to rotate it counter clockwise in Figs. 2 and 3 against a stop 48b.
  • a lever 49 pivoted on a horizontal axis is held by a. spring 5! against he latch 48.
  • the paper tape I4 is normally gripped between plates I5 and I6, passes in a loop around roller I1, to the printing platen II and, thence round the printing platen and between feed rollers I8 and I9.
  • the tension in the loop acting on roller II holds lever 45 against spring 41 and so holds pin 44 against trip lever 42 in the position shown in Fig. 3.
  • the link I in moving the striker pin 6 moves first to the right in Fig. 2 then back to the left to a position beyond its normal position and then moves to the right to return to its normal position.
  • the first movement to the right of link I rotates lever 26 counter clockwise and thus pin 25 rotates lever 2
  • lever 45 then causes lever 45 to rotate clockwise and pull a length of paper tape from the roll.
  • the rightward movement of link I allows spring 32 to rotate lever 30 clockwise about its pivot 3
  • ' pawl lever 38 is rotated counter clockwise to move pawl 39 to engage another tooth of ratchet 40.
  • lever 36 moves trip lever 42 to the left in Figs. 2 and 3 and it assumes the position shown in Fig. 4, moving into the position shown in dotted lines in Fig. 4 as the 'pin 44 moves inward.
  • trip arm 42 is formed with a projection 52 formed with a cam surface on one side, as shown in Figs. 3, 4 and 5 and the end of latch 49 is shaped as shown in those figures so that during movement of trip arm 42 to the right it is cammed outwardly by engagement of projection 52 with the end of latch 48.
  • a selector bar such as 56, Fig. 2 will be allowed to fall into a series of aligned notches in the comb discs 5.
  • Each such selector bar for which paper feeding is to be suppressed is so located in relation to a bell crank lever 51 that in the nonselected position it holds the corresponding lever 51 against the tension of a spring 58.
  • One arm of each of the levers 51 rests on a bail 59 pivoted on a horizontal axis 60 and carrying a rod 61 which extends upwardly just below the path of movement of pawl 33.
  • Ink ribbon feeding mechanism Ink ribbon spools l2 are mounted on hubs 63, Fig. '7, carrying pins 64 journalled in the frame In and carrying pms 65 fittmg mto apertures m ing the ratcheting action whenever the operated the spools l2 whereby these spools are driven by rotation of hubs 63.
  • Fixed to the hubs 63 are ratchet wheels 66 and one or other of these ratchet wheels is engaged by a pawl fixed on a pawl arm 81, pivoted at 68 on a lever 69.
  • the ink ribbon l3 passes through notches '10 On a frame H pivoted at 12.
  • the mechanism is substantially the same as that described in British specification No. 457,821.
  • Each time bell crank lever 30 is moved by link I in a counterclockwise direction a pin 13 thereon engages a pin 14 on lever 69 and lever 69 is thus caused to reciprocate pawl arm 61 to bring turned over portions 15 thereon into contact with the central arm of frame H and also to impart a step to one of the ratchet wheels 56.
  • a retaining pawl 16 is linked to pawl arm 61 and held in contact with the teeth of a ratchet wheel 66 by a jockey spring 11.
  • the pawl arm 61 is shown in such position that the feeding pawl and the retaining pawl 16 engage with the left hand ratchet wheel.
  • a button on the ink ribbon engages the right hand notch in frame H and rotates that frame counterclockwise.
  • the right hand projection 15 on the pawl arm 6! engages the central limb of frame 'H' and is rotated clockwise carrying retaining pawl 16 with it so that the pawls engage with the right hand ratchet wheel.
  • the ink ribbon feeding and reversing mechanism and the paper feeding and alarm mechanism are mounted on the frame In and only engage the mechanism of the teleprinter itself or such mechanism as is mounted on the cover 8 by the engagement of lever 30 with pin 29 and of pin 55 on lever 43 with pin 54.
  • the frame 10 may be readily swung away from its normal position, as indicated in Figs. 1 and 8 for access to the typewheel l, to clean the type for example.
  • Alarm actuating means for use with a tape feeding mechanism comprising a roller shiftable laterally upon slackening of the tape, an alarm operating element comprising a pair of switch contacts and a rocker arm centrally pivoted and spring biased to said operating position, a latch rotatable about an axis disposed at a right angle to the locking axis of said rocker arm, said latch having its free end normally in engagement with the end of said rocker arm, that is remote from the switch operating end thereof, and means responsive to lateral shifting of said roller to move said latch out of engaging position, thereby freeing said rocker arm for switch operating movement.
  • a pawl and ratchet mechanism for feeding the tape, mechanically operable means for interruptkey is such as to require no tape advance, and means for preventing alarm operation during and immediately after operating of said mechanically operable means, said preventing means including key operated means for shifting the position of the linkage normally operating to move the latch out of engaging position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Handling Of Sheets (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
US589247A 1944-03-24 1945-04-19 Alarm device for indicating failure of the paper feed mechanism in teleprinters Expired - Lifetime US2480165A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB267818X 1944-03-24
GB18527/45A GB596112A (en) 1944-03-24 1945-07-19 Improvements in or relating to alarm devices for indicating failure of the paper feed mechanism in teleprinters

Publications (1)

Publication Number Publication Date
US2480165A true US2480165A (en) 1949-08-30

Family

ID=32232447

Family Applications (2)

Application Number Title Priority Date Filing Date
US589247A Expired - Lifetime US2480165A (en) 1944-03-24 1945-04-19 Alarm device for indicating failure of the paper feed mechanism in teleprinters
US704975A Expired - Lifetime US2572057A (en) 1944-03-24 1946-10-22 Alarm device for indicating failure of the paper feed mechanism in teleprinters

Family Applications After (1)

Application Number Title Priority Date Filing Date
US704975A Expired - Lifetime US2572057A (en) 1944-03-24 1946-10-22 Alarm device for indicating failure of the paper feed mechanism in teleprinters

Country Status (4)

Country Link
US (2) US2480165A (enrdf_load_stackoverflow)
CH (2) CH267818A (enrdf_load_stackoverflow)
FR (2) FR928904A (enrdf_load_stackoverflow)
GB (1) GB582528A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL84726C (enrdf_load_stackoverflow) * 1951-06-30

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1138744A (en) * 1914-10-26 1915-05-11 Charles E Allinger Device for automatically controlling moving-picture machines.
US1192171A (en) * 1914-01-24 1916-07-25 Western Electric Co Controlling system.
US1281095A (en) * 1917-02-27 1918-10-08 Ferdinand Mccann Portable moving-picture machine.
US1641658A (en) * 1927-09-06 Paper-break detector switch
US1653328A (en) * 1926-10-25 1927-12-20 Elbert R Winslow Moving-picture-machine attachment
US1809817A (en) * 1927-09-23 1931-06-16 Sentry Safety Control Corp Safety unit for motion picture projectors
US1937061A (en) * 1930-05-03 1933-11-28 Corry Erie Mfg Company Automatic circuit breaker for motion picture apparatus
US1942524A (en) * 1929-05-21 1934-01-09 Celanese Corp Feeding of textile materials
US2222666A (en) * 1939-03-22 1940-11-26 Jacobson Joseph Safety device for moving picture projectors

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1343910A (en) * 1914-05-28 1920-06-22 Cutlerhammer Mfg Co Tension device
US1202952A (en) * 1915-07-28 1916-10-31 Western Electric Co Controlling system.
US1361860A (en) * 1919-06-26 1920-12-14 Stephen S Holt Film-rewinding machine
GB490368A (en) * 1937-02-11 1938-08-11 Francis Oliver Morrell Improvements in or relating to type-printing and reperforating telegraph apparatus
US2142880A (en) * 1937-12-15 1939-01-03 Western Union Telegraph Co Tape tie-up indicating means
US2179517A (en) * 1937-12-30 1939-11-14 American Can Co Control mechanism
US2214609A (en) * 1939-04-25 1940-09-10 Westinghouse Electric & Mfg Co Torque amplifier for dancer field rheostats
US2410521A (en) * 1942-05-22 1946-11-05 Teletype Corp Tape feed alarm

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1641658A (en) * 1927-09-06 Paper-break detector switch
US1192171A (en) * 1914-01-24 1916-07-25 Western Electric Co Controlling system.
US1138744A (en) * 1914-10-26 1915-05-11 Charles E Allinger Device for automatically controlling moving-picture machines.
US1281095A (en) * 1917-02-27 1918-10-08 Ferdinand Mccann Portable moving-picture machine.
US1653328A (en) * 1926-10-25 1927-12-20 Elbert R Winslow Moving-picture-machine attachment
US1809817A (en) * 1927-09-23 1931-06-16 Sentry Safety Control Corp Safety unit for motion picture projectors
US1942524A (en) * 1929-05-21 1934-01-09 Celanese Corp Feeding of textile materials
US1937061A (en) * 1930-05-03 1933-11-28 Corry Erie Mfg Company Automatic circuit breaker for motion picture apparatus
US2222666A (en) * 1939-03-22 1940-11-26 Jacobson Joseph Safety device for moving picture projectors

Also Published As

Publication number Publication date
CH267818A (de) 1950-04-15
FR55278E (enrdf_load_stackoverflow) 1952-01-09
CH281992A (de) 1952-03-31
US2572057A (en) 1951-10-23
GB582528A (en) 1946-11-20
FR928904A (fr) 1947-12-11

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