US2558003A - Printing telegraph receiver - Google Patents

Printing telegraph receiver Download PDF

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Publication number
US2558003A
US2558003A US769430A US76943047A US2558003A US 2558003 A US2558003 A US 2558003A US 769430 A US769430 A US 769430A US 76943047 A US76943047 A US 76943047A US 2558003 A US2558003 A US 2558003A
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Prior art keywords
feed
line
platen
signal
lever
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Expired - Lifetime
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US769430A
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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
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Creed and Co Ltd
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    • 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
    • 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 printing telegraph receivers for page printing comprising a platen mounted in a stationary part of the machine and a carriage carrying printing means traversable parallel to the platen.
  • the invention relates to the means for effecting line feed rotation of the platen.
  • One feature of the invention is a printing telegraph receiver comprising a platen mounted in a stationary part of the machine, a carriage carrying printing means traversable parallel to the platen, means for imparting line feed motion to a device separate from the platen and gearing means for rotating the said platen from said device.
  • line-feed mechanism include any mechanism for back-line-feed, if such be provided.
  • the receiver comprises a reciprocating mechanism, means for operating said mechanism for each received signal and means operable in response to the receipt of a particular signal for causing said reciprocating mechanism to be effective to rotate the platen through a given arc.
  • the particular signal required to effect back line feed is a signal already allotted to some other function or to a character.
  • the receipt of an auxiliary shift signal as proposed in my copending application bearing Serial Number 761,523, filed July 17, 1947 immediately followed by the receipt of the signal in question will be necessary to effect a back-line-ieed operation.
  • a :back-line-feed signal or a signal for effecting back-linefeed such term must be taken to in clude such combination of two signals.
  • a formfeed signal Mention will thereinafter be made of a formfeed signal and by this is meant a signal that is effective to cause the platen to be rotated until paper thereon comes to a predetermined position.
  • Printin telegraph messages are often received upon printed forms and a number of these forms may be connected together in a continuous roll. It is evidently desirable that in such circumstances a received message should commence at the proper place on one of the forms.
  • provision may be made whereby a succession of line feed operations are efiective at the receiver until the paper around the platen comes into proper position, whereupon they cease to be effective.
  • a succession of line feed operations may result from the operator at the distant transmitter operating a key the required number of times, or preferably from the operator depressing a form-feed key. This key may cause the transmission of a succession of line-feed signals, or may cause the transmission of a formfeed signal which automatically causes the receiver mechanism to act as if it had received succession of line feed signals.
  • One feature of the present invention is a printing telegraph receiver comprising a platen mounted in a stationary part of the machine, a carriage carrying printing means traversable parallel to the platen, means responsive to received signals for imparting a succession of linefeed rotations to said platen, a seeker member, and means responsive to said seeker member entering a perforation in paper upon said platen for arresting the motion of said platen.
  • Fig. 1 is a plan view of the mechanism for effecting line-feed, back-line-feed and form-feed operations.
  • Fig. 2 is a view in elevation of that part of the mechanism of Fig. 1 concerned with a line-feed operation, some parts being broken awayfor a clearer view.
  • Fig. 3 is a View in elevation of that part of the mechanism of Fig. 1 concerned with a back linefeed operation.
  • Fig. 4 is a section on the line AA of Fig. 1 showing the mechanism in rest position.
  • Figs. 5 and 6 are similar sections showing the mechanism in different positions. (only part of the mechanism is shown in Fig. 5).
  • Fig. 7 is a diagram showing the instants in several cycles of operation of the mechanism at which various parts thereof are effective.
  • the successively received code elements of a signal are caused to set five storage members (assuming a five unit code is used) under the joint control of the receiving magnet and a selector cam shaft released for rotation by the response of this magnet to the start element of a signal.
  • the selector cam shaft during its rotation, releases a translator cam shaft for rotation, and a cam on this translator cam shaft moves the five storage members that have been set, as stated above, to cause them to move five vertical rods, each rod being moved in one or other direction of its length according to the character (marking or spacing) of the corresponding code element.
  • the vertical rods are linked with corresponding code discs and with corresponding function-selector members.
  • the code discs serve to select a character to be printed. Their position is indicated at i in Figs. 2 and 3 in order to show the position of the mechanism of the present invention in relation to the remainder of the machine.
  • One function-selector member 2 is shown in Figs. 2, 4, 5 and 6 and another function-selector-member 3 in Fig. 3.
  • a selector bar such as 4, 5 or 6 is allowed to move under the influence of a spring 1, Figs. 2, 4, 5 and 6 or 8 Fig. 3.
  • selector. bars can only move into selected position if the signals representing them have been preceded by a figure shift signal. Others can only move into selected position if the signals representing them have been preceded by an auxiliary shift signal, as fully described in the above mentioned application.
  • Selector bar 4 is moved into selected position by spring I when a line-feed signal is received.
  • Selector bar 5 is moved into selected position by spring 8 when an auxiliary shift signal immediately followed by a back-line-feed signal is received.
  • the invention relates to a page printing telegraph receiver in which the platen 9 (Figs. 4, 5 and 6), around which is wound the paper H] upon which printing is to take place is mounted for rotation in a stationary part of the framework of the machine.
  • the printing carriage upon which is mounted the typing means, is traversed parallel to the platen for the printing of successive characters in a line of printing. For each line-feed operation, whether forward line-feed or back-line-feed, the platen must be rotated through a given are.
  • the line feed mechanism instead of acting directly upon the platen 9, operates to rotate a gear wheel l I, Figs. 1, 5
  • Fig. 2 shows the plate 16 and the ratchet l4 partly broken away.
  • a pawl H is pivoted on a pin i8 fixed to plate 15 and is urged by a spring 19 for rotation into engagement with ratchet wheel 13.
  • Another pawl 20 Fig. 3 is pivoted on a pin 2
  • the pawl H is held out of engagement with the ratchet wheel 13 by a line-feed-suppressorlever 23 pivoted on a stub-shaft 24 and engaging a pin 25 fixed to pawl ii.
  • the pawl 20 is held out of engagement with the ratchet wheel M by a backeline-feed-suppressor lever 26 also pivoted on the stub-shaft 24 and engaging a pin 21 fixed to pawl 20.
  • a frame 28 is also pivoted on the stub-shaft 2d and carries tappets 29 and 30 (as well as a third tappet 3i referred to hereinafter) which engage line-feed-suppressor lever 23 and back-line-feed-suppressor lever 25 respectively and hold these levers in the positions shown in Figs. 2, 3 and 4 against the pull of springs 32 and 33 respectively.
  • Tappet 29 is however, not shown in Figs. 4 and 5 since it would obscure the view of tappet 3
  • One arm 34 of the frame 28 is bent as shown in Figs. 1, 2 and 3 and one end of a link 35 fits on a pin 35 on the bent portion 31. The other end of link 35 fits on a pin 38 on plate l6.
  • Plate [6 is connected by a link 39 to a lever 46 fixed on a stub shaft 4i journalled in bearings (not shown) in the framework of the machine.
  • Fixed to stub shaft 4! is a lever 52' connected by a link 43 to a lever 44 fixed to a sleeve 55 (Fig. l) journalled on a pin 46 mounted on the fixed part of the framework.
  • Fixed to sleeve 45 is a lever 41 carrying a cam-follower 58 and urged by a spring 49, Fig. 2 to hold the cam-follower 48 in engagement with a cam 50.
  • Member 53 carries an adjusting screw 54 working in a slot 55 in plate 5
  • Member 53 is connected by a link 55 to plate 15.
  • Member 53 is shown in one position in Fig. 2 and in another position in Figs. 4 and 6 and it will be noted that a given movement of plate 5! will result in twice the movement of plate l5 for the position of member 53 in Fig. 2 from that which will result for the position of member 53 in Figs. 4 and 6.
  • the mechanism may be set to feed at each operation either the space of a single line or of two lines.
  • a function cam shaft is released for rotation for one revolution, as described in the above mentioned prior application.
  • Cam 5!] is one of the cams on the function cam shaft and thus is rotated each time a signal is received.
  • Cam 58 through the linkagesabove described rotates plate i5 in an anti-clockwise direction about shaft l2 and plate I6 in a clockwise direction about this shaft.
  • 'Plate it rotates, through link 35, frame 28 about shaft 24 and thus tappets 29 and 30 are removed from engagement with line-feed suppressor lever 23 and back-line-feed-suppressorlever 26 respectively.
  • These levers are however drawn by springs 32 and 33 to follow the tappets 29 and 30. If, however, the received signal has levers 23 and 2B and thus prevent these levers Y from moving more than a very small distance.
  • the plates I5 and is are rotated in the opposite directions and the overshoot stop 64 is Withdrawn from engagement with the gear wheel II.
  • This wheel is held in position by a jockey roller 65 held against the wheel by a spring 66.
  • the tappet 29 Fig. 2 presses on the line-feed suppressor lever 23 to move it with the frame 28 back to initial position and shortly before the end of the return movement of the frame tappet 3i) re-engages back-line-feed-suppressor lever 26 Fig. 3 and restores it to initial position.
  • the line feed selector bar 4 will be in unselected position and the back-line-feed selector bar 5, Fig. 3, will move into selected position, in which position the projection 58 will be removed from the path of movement of the back-1ine-feed-suppressor-lever 28.
  • a cycle of movement of the mechanism will take place in a manner similar to that described above save that the line feed suppressor lever 23 will be prevented from following the frame 28 whereas the back-line-feed-suppressor lever 26 will be drawn by its spring 33 to follow the frame 28 in its upward movement and the pawl will thus be allowed to be pulled into engagement with ratchet wheel I4.
  • the ratchet wheel M will be rotated in a clock-wise direction as seen in Fig. 3 and the gear wheel H and consequently the platen 9 will be rotated to bring a line on the paper that was selectable to be now selectable.
  • a jockey roller similar to the jockey roller 65 is provided for holding the gear wheel fixed to the platen 9.
  • the auxiliary shift signal positions the code-function-selector members so that an auxiliary shift selector bar is moved into selected position and a vane similar to other codefuncton-selector members, is set in such position as to cause certain selector bars, not previously One ofthese bars is the form-feed selector bar 6, Figs. 4, 5 and 6.
  • the form feed selector bar 6 is moved to the right in Fig. 4, It should here be noted that the selector bar 6 is shown in Figs. 4, 5 and 6 a little to the left of the respective correct positions, in order that it may be clearly distinguished from the line-feed selector bar 4.
  • a projection 6'! on the selector bar 6 rests against a projection on an interposing member 68 pivoted at 69 and tending to be drawn to the right in Figs. 4, 5 and 6 by a spring it.
  • the interposing member 68 is drawn by spring Ill to follow it but is arrested after a very small movement by a tooth ll on a latch 72.
  • the latch 12 is pivoted on the shaft 2:3 and is drawn upwards by a spring 13 so that its end rests against a turned-over portion l l on the end of formfeed-lever i5.
  • This form-feed-lever i5 is also pivoted on shaft 24 and urged clockwise by a spring 18.
  • the form-feed-lever '15 now rotates clockwise.
  • a second arm 83 of the bifurcation of this lever is in engagement with a pin 84 on a seeker member 85 and rotates this seeker member to bring the end thereof into contact with the paper ill on the platen 9.
  • the paper It is provided with perforations at intervals and a groove is formed in the platen 9 so that if the seeker 85 enters a perforation it move into the groove.
  • the perforations are so located that if a perforation is opposite the seeker 85 the first line of a form is in position for printing to take place thereon.
  • These perforations may, in the case of sprocket fed paper, be formed as elongations parallel to the axis of the platen of the perforations normally provided for engagement by the teeth of the sprocket wheel.
  • the seeker 85 comes into contact with the paper iii which arrest it and, prevents the forfeed-lever '55 from moving to the full extent permitted by the tappet 34 on the frame 28.
  • FIG. '7 will show the relative timing of the various actions that take place.
  • This figure shows the operations during several succession rotations of the cam 50.
  • the line-feed-selector bar has been selected as above described. It is then assumed that the form-feed signal is received.
  • the second rotation of the cam 58 shown is that immediately following the receipt of this signal, the intermediate rotation following the receipt of the auxiliary shift signal being omitted. It is also assumed that during the second rotation shown the seeker 85 does not enter a perforation in the paper.
  • cam 58 continues to rotate. This may be accomplished in several different ways. I
  • the frame 28 in its return movement moves the form-feed lever 15 and the line-feecl-suppressor lever 23 counter-clockwise.
  • the seeker 85 is withdrawn from the perforation in the paper 10 and the lever 23 moves the pawl H from engagement with the ratchet wheel 13.
  • the right hand end of lever 23 rises and allows the projection Bl thereon to move clear of projection 85 on interposing member 53 whereupon the interposing member 68 moves further to the right to bring projection 86 thereon under projection 81 on lever 23.
  • the timing of the operations just described is shown in Fig.
  • Cam 50 may now rotate one or more times but no line-feed operations will take place corresponding to such rotations despite the fact that the form-feed selector bar 6 and line-feed selector bar 4 remain in selected position, because projection 88 on interposing member 68 remains in engagement with the underside of projection 81 on lever 23 and prevents that lever from following the movement of frame 28. Consequently pawl IT is held out of engagement with ratchet l3 and no feeding motion of the paper takes place.
  • Fig. 6 shows the position of the mechanism during one of these subsequent rotations of cam .58 at the moment when the seeker 85 has entered the perforation in the paper (which it will do at each such revolution since the paper will remain in the same position).
  • the tooth H on latch 22 is behind interposing member 68 and thus latch 12 can follow form-feed lever M during each reciprocation.
  • a page printing telegraph receiver comprising a platen mounted in a stationary part of said receiver, a movable carriage traversable in a plane parallel to the axis of said platen, printing means mounted upon said carriage, a reciprocating mechanism, two oppositely directed ratchet wheels rotatably mounted on said mechanism, a gear wheel fixed to both of said ratchet wheels, a pair of pawls, each of said pawls cooperating with a different one of said ratchet wheels, means for selectively operating said mechanism thereby to cause one of said pawls to operate on its corresponding ratchet wheel, gearing means disposed between said platen and said gear wheel, whereby said platen is caused to rotate through a given are and in a given direction so as to effect a line feed or a back line feed.
  • a page printing telegraph receiver comprising a platen mounted in a stationary part of said receiver, a movable carriage traversable in a plane parallel to the axis of said platen, printing means mounted upon said carriage, two oppositely directed ratchet wheels, a gear fixed to both of said wheels, gear means disposed between said platen and said first named gear, a pair of pawls, each of said pawls cooperating with a difierent one of said wheels, a reciprocating mechanism, said pawls mounted on said mechanism, rotating cam means, said cam means coupled to said mechanism, signal responsive means, means controlled by said signal responsive means for permitting one of said pawls to operate on its corresponding wheel whereby said platen is caused to rotate through a given are and in a given direction so as to efiect a line feed or a back line feed.
  • a page printing telegraph receiver as claimed in claim 2 wherein said pawls further comprise spring means for rotating each of said pawls into engagement with its corresponding wheel, and said means controlled by said signal responsive means for permitting one of said pawls to operate on its corresponding wheel comprises a pair of pivotally mounted members, said members in contact with said pawls for normally holding same is disengagement with said wheels, and selector means coupled to said members, said selector means operable in response to line feed signals and back line feed signals respectively.
  • a page printing telegraph receiver as claimed in claim 3 wherein said selector means comprise a pair of selector bars, each having an abutment thereon, each of said bars cooperating with a. different one of said members each of said members normally restrained from movement by the abutment on its corresponding bar, means for selectively moving said bars out of the 10 path of said members in response to received line signals whereby the pawl associated with the unrestrained member engages its correspon in wheel for that part of the cycle of said reciprocating mechanism during which a rotation of said platen is to be efiected.
  • a page printing telegraph receiver comprising a platen mounted in a stationary part of said receiver, said platen having an annular groove formed around the circumference thereof near one of the extremities of said platen, said platen adapted to carry message paper therearound, such paper to be provided with perforations at predetermined positions thereon in register with the groove'in said platen, a movable carriage traversable in a plane parallel to the axis of said platen, printing means mounted upon said carriage, two oppositely directed ratchet wheels, and a gear fixed to both of said wheels, gear means disposed between sad platen and said first-named gear, a pair of pawls, each of said pawls cooperating with a different one of said wheels, a reciprocating mechanism, said pawls mounted on said mechanism, rotating cam means, said cam means coupled to said mechanism, a seeker member pivotally mounted in a stationary part of said receiver, said member in register with the groove in said platen and adapted to be urged against the perforations in the message paper there
  • a page printing telegraph receiver as claimed in claim 5 further comprising a rotatable cam for operating said reciprocating mechanism, means for releasing said cam for rotation for each received signal and means operative when said seeker member enters the groove in said platen to arrest said cam upon the completion of a rotation thereof.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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US769430A 1946-06-21 1947-08-19 Printing telegraph receiver Expired - Lifetime US2558003A (en)

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BE (1) BE480143A (de)
FR (1) FR952892A (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US795739A (en) * 1904-11-22 1905-07-25 George A Raney Water-level indicator.
US2244074A (en) * 1939-10-21 1941-06-03 American Telephone & Telegraph Reversible line feed for teletypewriters
US2273081A (en) * 1940-07-13 1942-02-17 Teletype Corp Printing telegraph apparatus
US2273067A (en) * 1940-07-13 1942-02-17 Teletype Corp Printing telegraph apparatus
US2276991A (en) * 1939-06-09 1942-03-17 Western Union Telegraph Co Telegraph apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US795739A (en) * 1904-11-22 1905-07-25 George A Raney Water-level indicator.
US2276991A (en) * 1939-06-09 1942-03-17 Western Union Telegraph Co Telegraph apparatus
US2244074A (en) * 1939-10-21 1941-06-03 American Telephone & Telegraph Reversible line feed for teletypewriters
US2273081A (en) * 1940-07-13 1942-02-17 Teletype Corp Printing telegraph apparatus
US2273067A (en) * 1940-07-13 1942-02-17 Teletype Corp Printing telegraph apparatus

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FR952892A (fr) 1949-11-25
BE480143A (de)

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