US2521750A - Selector mechanism for printing telegraph receivers - Google Patents

Selector mechanism for printing telegraph receivers Download PDF

Info

Publication number
US2521750A
US2521750A US715903A US71590346A US2521750A US 2521750 A US2521750 A US 2521750A US 715903 A US715903 A US 715903A US 71590346 A US71590346 A US 71590346A US 2521750 A US2521750 A US 2521750A
Authority
US
United States
Prior art keywords
lever
armature
storage
cam
selector
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
US715903A
Other languages
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
Priority claimed from GB2789845A external-priority patent/GB600297A/en
Application filed by Creed and Co Ltd filed Critical Creed and Co Ltd
Application granted granted Critical
Publication of US2521750A publication Critical patent/US2521750A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L17/00—Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code
    • H04L17/16—Apparatus or circuits at the receiving end
    • H04L17/18—Code selection mechanisms

Definitions

  • This invention relates to printing telegraph receivers. More particularly the invention relates to that kind of printing telegraph receiver in which storage members are set in accordance with the code elements of the signal combination and these members are afterwards caused to act upon the translator mechanism.
  • the present invention relates to the selecting and storage mechanism and is independent of the nature of the translator mechanism, that is, the mechanism for translating the setting of the storage members into the positioning of a type wheel, selection of a type bar or like means for ensuring that the correct character or representation thereof is printed or perforated.
  • the degree of tolerance for distorted signals dependsupon the time required for the current in the magnet winding to rise to its operating value and the time required for the armature to move to its operative position. In order to reduce the last mentioned time it is one object of the present invention to reduce to a minimum the moment of inertia of the electromagnet armature system.
  • a signal selector and storage mechanism for a printing telegraph receiver comprising storage members for the successive elements of abode combination, means for traversing said storage members past the position of a member carried by the armature of the receiving magnet, and means for setting successive storage members in accordance with the successive positions of the armature.
  • the said armature member may be carried in guides in the armature system and be struck endways to act upon the successive storage members.
  • the selector cam assembly therefore, is preferably driven by a clutch independently of all other cams in the machine.
  • the moment of inertia of the selector cam assembly is made very small and can be made of very light and rigid construction.
  • the clutch driving the selector cam assembly is a friction clutch since this can be made'to have less Variation in pick-up time than a-ratchet clutch.
  • Figs. 1 to 6 show different parts of one form of signal selector and storage mechanism according to the invention, th inter relation between the parts being clear from the fact that at least one part is common to one or more of the figures.
  • Figs. '7 and 8 show a second form of signal selector and storage mechanism according to the invention.
  • the signal receiving magnet l is shown in Fig. 1 somewhat diagrammatically.
  • the proportions and details of design are preferably such that it develops maximum efiiciency for that particular degree of movement of the armature "2 required to perform the operations described below.
  • the armature 2 is fixed to a pivot rod 3 mounted in fixed bearings (not shown). Fixed to the pivot rod 3 is a light armature lever 4. of the lever i is upturned at 5 and engages a latch 8 which is pivoted at i on one arm of a detent release lever 3 in the form of a bell crank, in turn pivoted at .l on the framework of the machine.
  • the detent release lever B is urged in a counterclockwise direction by a spring i3, whilst the latch 6 is urged in a clockwise direction by a spring I I.
  • the selector cam assembly consists of two discs only, one being a detent plate 12, Figs. 1 and 2, and the other the selector cam proper [3, Fig. 3. These two discs are fixedly mounted on a short shaft I4, driven from a constantly rotating shaft (not shown) through a friction clutch in well known manner.
  • This cam assembly is very light and requires only a small amount of power to accelerate it rapidly.
  • the selector cam assembly is normally held against rotation by means of the engagement of a projection 55 thereon with the bent over end of one arm l6, Fig. 1, of a detent lever.
  • This detent lever has three arms Hi, I! and H3, and is pivoted at H! on a frame 28 that can be moved by hand in an arc coaxial with the axis of rotation of the selector cam assembly. Rotation of the frame is for the purpose of orientation adjustment, a scale 2i being provided to indicate the degree of adjustment.
  • the middle arm ll of the detent lever embraces a pin 22 on the detent release lever-8.
  • the third arm It is for the purpose of resetting the detent lever in a manner presently to be explained.
  • the arm l6 of the detent lever is-also rotated in 1 a counterclockwise direction thus removing its end from the projection l5 and allowing the se lector cam assembly to rotate in the direction of the arrow.
  • the latch 6 is drawn by its spring El until it contacts with a fixed stop'23, which causes the latch ii to be disengaged from the upturned end of the armature lever 4.
  • the detent plate I2 is formed with two bent over lugs 24 and 25, lug 24 being bent downwards from the plane of the paper in Fig. 1 and lug 25 5..”
  • latch 6 will re-engage the upturned end 5 of armature lever 4, but if, due to non-receipt of the stop element or other mischance, the armature l remains in spacing position and armature lever 4 is in its right hand position, a, tooth 26 on the latch ii will be moved beyond the fixed stop 23 and the spring One end I! will draw latch 6 to the right. Engagement of tooth 25 with the fixed stop 23 will then prevent movement of latch 6 downwards in Fig.
  • Lug 24 on detent plate l2 engages, shortly after the latter has commenced its rotation, an arm of a. lever 21, Fig. 2, which is held by a spring 28 in engagement with a pawl 29 and thus holds the pawl 29 out of engagement with a ratchet 30.
  • the ratchet 30 is mounted on a motor driven shaft 3,! and the pawl 29 is carried on a cam sleeve 32 which carries the translator cam and other cams for the operation of the machine, other than the selector cam assembly.
  • the pawl 23 and ratchet 30 constitute a well known form of ratchet clutch by means of which when engaged the cam sleeve 22 is driven by the motor driven shaft 21.
  • the left hand arm of the armature lever 4 carries at its end a plate 33, Fig. 3, having therein a slot in which slides one end of a striking rod 34, the other end of which is pivoted to the end of a striking lever 35.
  • This latter lever is pivoted at 36 and is drawn to the right in Fig. 3 by a spring 31, with a roller 38 on the lever engaging the selector cam l3.
  • the selector cam I3 is formed with five humps which cause leftward movement of lever 35 and so move striker rod 34 to the left. It will be observed that the left-hand end of armature 4 is provided with a bent-over lip 33 which can assume either one of two positions, namely the full-line position or the dotted line position shown in Fig.
  • a pivoted lever 35a which is held in the position shown in Fig. 3, against the tension of spring 36a and under control of the lever 35 when the roller 38 is resting in a valley of the cam I3 as a result of the tension of spring 37.
  • the lever 35a has its lower end held in the position shown in Fig. 3 by engagement with a suitable groove or notch in rod 34.
  • cam sleeve 32 As previously described the translator cam sleeve 32, Fig. 2, has been released for rotation.
  • This cam sleeve carries cams to control the translating mechanism and to initiate other functions of the machine.
  • One of the cams thereon viz. cam 39, Fig. 3, causes the endways traverse of a frame 40, Figs. 3 to 6, along a spindle 4!.
  • the frame 40 carries a pin 42 the axis of which is parallel to spindle 4
  • Mounted on pin 42 are five.
  • signal storage members 43 separated from each other by spacing washers.
  • the storage members 43 and washers are pressed together by a spring 44, Fig. 5, mounted on the pin 42.
  • the storage members are free for a limited amount of rotation on pin 42 being held by friction in the position into which they are rotated whilst the washers are prevented from rotating with respect to the pin.
  • the shape of the storage members 43 is seen in Fig. 3 and in Fig. 6. Each of them is formed with short arms extending vertically upwards and downwards respectively and a horizontal arm.
  • Endways motion of the frame 46 causes the storage members 43 to be traversed past the end of the striker rod 34, Fig. 3.
  • striker rod 34 When the armature lever 4 is in its lowest position striker rod 34, when moved to the left in Fig. 3, strikes the upper vertical arm of a storage member 43.
  • striker rod 34 misses the storage member.
  • the endways motion of the frame 40 is timed by cam 39 so that the five storage members 43 are brought into line with the striker rod 34 seriatim so that the successive storage members 43 are struck by successive striking actions of the rod 34.
  • the bell crank levers 49 are pivoted on pins 50 and 5
  • the vertical arms of each pair extend towards one another and the horizontal arms extend in a direction away from the striker rod 34.
  • the horizontal arms of each pair of bell crank levers 49 engage with a vertical rod 52 which is linked with a combination disc 53, Fig. 4.
  • a storage member 43 When a storage member 43 is in the unset po sition represented by the full line in Fig. 4, it engages the downwardly extending arm 49a of its corresponding upper bell crank lever 49, and when in the set position represented by the dotted line in Fig. 4, the storage member 43 engages the vertical arm 49b of the lower bell crank lever. Actuation of the upper bell crank lever 49 will move the vertical rod 52 into an upper extreme position and actuation of the lower bell crank lever 49 will move this rod into a lower position. Movement of the rod 52 will result in rotation, in one direction or the other, of the corresponding combination disc 53.
  • the frame 40 is moved by cam 39, Fig. 3, endways to bring the first storage member 43 again into line with the striker rod 34.
  • the frame 46 is controlled by a guide plate 54 (Figs. 4 to 6) and as the frame 46 returns to its initial position and becomes disengaged from the driving pin 45, the frame is controlled in a fixed rotary position by this guide plate.
  • One of the cams 48, acting on lever 46 rotates the spindle 4
  • the selector cam assembly consists, as in the first embodiment described of a detent plate and a selector disc l3.
  • the arrangements for releasing this cam assembly for rotation and for the release by the detent plate of the translator cam assembly are similar to those in the first embodiment.
  • the selector lever 35 is acted on by the selector cam l3 as previously described and strikes the blade 56 sideways towards a storage member 43.
  • the storage members are of slightly different shape from those in the first embodiment and each has a vertical projection 43a. tocooperate with theblade 5t and two other projections 43b and 430.
  • the storage'members 43 are mounted in a frame 4
  • a cam 31 rotates a bell crank lever 58 in a clockwise direction against a spring 59.
  • Pivoted on a common pivot 60 on bell crank lever 58 are five sword members 6
  • are linked with combination discs '53 which are accordingly rotated through a small arc in one direction or the other.
  • after being set are moved clear of the storage members 43 and immediately afterwards the frame 46 is moved to bring the first storage member again into line with the end of the selecting blade 56.
  • Signal selector and storage mechanism for a printing telegraph receiving machine comprising, an electro-magnet having an armature, a plurality of selectively shiftable storage elements, one for each signal element of a plural element code, a setting member controlled by said electromagnet for setting said storage elements, said storage elements being mounted in an array with respect to said member so that said member is capable of cooperative engagement with respect to only one of said elements at a time, a frame carrying said storage elements, cam control means for reciprocating said frame laterally with respect to said setting member, and other cam control means for moving said frame bodily as a unit in a direction transverse to said reciprocating movement for causing said setting member to be operative to set each of said storage elements in turn in accordance with the selective positions of said armature as determined by the successive code elements of a received signal.
  • Signal selector and storage mechanism further comprising a plurality of code combination discs, one for each element of the code, a plurality of pairs of rockably mounted elements, each pair linked to a dif Schlieren't one of said discs and the elements of each pair adapted to move said discs in opposite directions, said storage elements mounted in selective positioning array with said pairs of rockable elements, each of said storage elements adapted to engage either of said rockable elements in response to movements of said setting member.
  • each of said storage elements comprises, an operating arm arranged to assume either an upper or lower position as determined'by said electromagnet, a plurality of upper and lower sets ofbell crank levers i operative engagement with said storage element arms,

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mechanical Operated Clutches (AREA)
US715903A 1945-10-23 1946-12-13 Selector mechanism for printing telegraph receivers Expired - Lifetime US2521750A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2789845A GB600297A (en) 1945-10-23 Improvements in or relating to printing telegraph receivers

Publications (1)

Publication Number Publication Date
US2521750A true US2521750A (en) 1950-09-12

Family

ID=10267055

Family Applications (1)

Application Number Title Priority Date Filing Date
US715903A Expired - Lifetime US2521750A (en) 1945-10-23 1946-12-13 Selector mechanism for printing telegraph receivers

Country Status (4)

Country Link
US (1) US2521750A (xx)
BE (1) BE476866A (xx)
CH (1) CH271780A (xx)
FR (1) FR954485A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2612555A (en) * 1951-10-17 1952-09-30 Gray Res And Dev Company Inc Telegraph selector mechanism
US2754361A (en) * 1950-10-16 1956-07-10 Kleinschmidt Lab Inc Selector mechanism
US2773931A (en) * 1951-07-06 1956-12-11 Kleinschmidt Lab Inc Printing telegraph apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977668C (de) * 1951-10-31 1968-03-14 Scm Corp Mechanische Empfangswaehleinrichtung fuer Fernschreibmaschinen
DE1036309B (de) * 1956-01-07 1958-08-14 Standard Elektrik Lorenz Ag Empfangssystem fuer Telegrafierzeichen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1108529A (en) * 1904-08-25 1914-08-25 Underhill Telegraph Translator Company Telegraph system.
US1904164A (en) * 1930-07-11 1933-04-18 Teletype Corp Signaling system and apparatus therefor
US1917308A (en) * 1930-01-30 1933-07-11 Teletype Corp Pin barrel selector armature retaining type
US1932932A (en) * 1933-06-02 1933-10-31 Creed & Co Ltd Start-stop telegraph system and apparatus therefor
US2262471A (en) * 1938-09-16 1941-11-11 Julian H Kay Selective electric switch apparatus
US2273083A (en) * 1940-08-17 1942-02-17 Western Union Telegraph Co Telegraph storage transmitter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1108529A (en) * 1904-08-25 1914-08-25 Underhill Telegraph Translator Company Telegraph system.
US1917308A (en) * 1930-01-30 1933-07-11 Teletype Corp Pin barrel selector armature retaining type
US1904164A (en) * 1930-07-11 1933-04-18 Teletype Corp Signaling system and apparatus therefor
US1932932A (en) * 1933-06-02 1933-10-31 Creed & Co Ltd Start-stop telegraph system and apparatus therefor
US2262471A (en) * 1938-09-16 1941-11-11 Julian H Kay Selective electric switch apparatus
US2273083A (en) * 1940-08-17 1942-02-17 Western Union Telegraph Co Telegraph storage transmitter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754361A (en) * 1950-10-16 1956-07-10 Kleinschmidt Lab Inc Selector mechanism
US2773931A (en) * 1951-07-06 1956-12-11 Kleinschmidt Lab Inc Printing telegraph apparatus
US2612555A (en) * 1951-10-17 1952-09-30 Gray Res And Dev Company Inc Telegraph selector mechanism

Also Published As

Publication number Publication date
CH271780A (de) 1950-11-15
FR954485A (xx) 1950-01-03
BE476866A (xx)

Similar Documents

Publication Publication Date Title
US2505729A (en) Printing telegraph apparatus
US3255693A (en) High speed printer operatively controlled by mechanical impulses
GB491352A (en) Improvements in or relating to selecting and typing means for printing telegraphs
US2521750A (en) Selector mechanism for printing telegraph receivers
US1864088A (en) Selecting mechanism
US3201514A (en) Miniature bulletin printer
US2146380A (en) Printing telegraph apparatus
US2192351A (en) Selecting and printing apparatus
US2756273A (en) Tape feed arrestor
US2701045A (en) Backspacing mechanism
US1567599A (en) Telegraph typewriter
US2329652A (en) Printing telegraph apparatus
US2802048A (en) Selecting and printing apparatus
US2524854A (en) Printing telegraph receiver
US2167528A (en) Telegraph transmitter
US1745633A (en) Telegraph receiver
US2182635A (en) Printing telegraph apparatus
US3014093A (en) Printing telegraph storage transmistter with card reader and handling mechanism
US2294436A (en) Printing telegraph apparatus
US2182634A (en) Printing telegraph apparatus
US3176069A (en) Type wheel mechanism for printing telegraph page printer
US2951902A (en) Printing telegraph reperforator
US2480165A (en) Alarm device for indicating failure of the paper feed mechanism in teleprinters
US2284681A (en) Recording and exhibiting mechanism
US2735887A (en) goetz