US1929485A - Apparatus for the transmission at alpha distance of graphics - Google Patents

Apparatus for the transmission at alpha distance of graphics Download PDF

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Publication number
US1929485A
US1929485A US499881A US49988130A US1929485A US 1929485 A US1929485 A US 1929485A US 499881 A US499881 A US 499881A US 49988130 A US49988130 A US 49988130A US 1929485 A US1929485 A US 1929485A
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United States
Prior art keywords
carriage
cylinder
contact
conductor
pulley
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Expired - Lifetime
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US499881A
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English (en)
Inventor
Delchef Georges
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Individual
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Individual
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Publication of US1929485A publication Critical patent/US1929485A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/06—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface

Definitions

  • This invention relates to an apparatus for the transmission at a kind
  • the graphic to be transmitted which is written on a transmitting sheet, for in in stance of paper, produces variations or interruptions of current, whilst the receiving surface formed of a sheet of sensitive paper is discoloured according to the variations of the transmitting current;
  • My invention has for its object to obviate those inconveniences and to assure by simple means that the receiving apparatus should automatically receive, that is to say, without the users intervention, a considerable number of successive messages, notwithstanding the absence of a correct synchronism or of identical speeds of displacement, any appreciable distortion of the graphics being practically prevented.
  • Figure 1 is a diagrammatical side elevation of an apparatus constructed according to the present invention.
  • Figure 2 is an end view of the apparatus.
  • Figure 3 is an explanatory view showing diadistance of graphics of any grammatically the several electrical circuits and the several parts of the apparatus with which v these circuits are cooperating.
  • Figure 6 shows diagrammatically the cooperation of the transmitting and of the receiving apparatus.
  • the transmitting and the receiving apparatuses are of similar construction, each of them comprises a frame composed of a base 1, of two lateral uprights 2 and 3 which are,
  • a cylinder 5 of conducting material is located and is supported in the said uprights so as to be able to rotate around its longitudinal axis on the one hand in the upright 4 by aid of a trunnion 6 and, on the other hand, by aid of a sleeve 7 resting against the end of a screw 8 mounted in the upright 2.
  • a brush 18 connected to a conductor '17 leading to a contact breaker 44-43 which will be described later on, from which a conductor 16 leads to the receiving apparatus wherefrom the current is returned through a conductor 15 in 95 which a source or current, such as a battery S is inserted, the said conductor 15 being-finally connected tothe terminal 12 which is in electrical connection through the contact bearer. 13 and the contact 14 with the cylinder 5.
  • This 100 electrical circuit is closed through the cylinder 01' the cylinder 5 on its axis each time the carriage 11 is brought back to its initial or starting position that is to sayin its lowest position on the rods 9 and 10.
  • the carriage 11 is provided with a camlike projection 19, cooperating with a lever 20.
  • This lever 20 which carries a pawl 22, acting between the teeth of a ratchet wheel 23, is pivotally mounted at the lower end of the cylinder 5 on an axis 21 and is ended by a lateral projection 26 forming (Fig. 4) an inclined plane 24 cooperating with the projection 19.
  • This lever 20 is further normally maintained in contact by a mass 25 with a stop 25 fixed to the base 1.
  • the said carriage is further connected by a rope 28 to a second pulley 28 which is mounted in suitable brackets on the upright 2.
  • This latter pulley is mounted on a fixed rod 28 to which it is connected by a spiral spring 28* in such a manner that the said spring is put under tension at .each ascending stroke of the carriage 11 along the rods 9 and 10.
  • the upright 3 forms three branches 29 29 and 29 projecting at right angles, one of which 29 only is shown in Fig. 1. Two of these branches 29 and 29 form bearings for a shaft 30 (Fig. 3) on which is keyed the pulley 2'7 already described.
  • the shaft 30 is provided at one end with a plate 31 against which bears a spring 32 coiled around the shaft 30 and resting with its other end against a ring 33 embedded in the branch 29.
  • the shaft 34 of the electromotor M mounted on a suitable support (not shown).
  • a plate 35 provided with a distributor 36 as commonly used in -electromagnetic clutches; this distributor is inserted in an electric circuit comprising conductors 3'7 and 3'7 and an electric source S.
  • the branch 29 is provided with 'a projection 38 (Fig. 3) carrying a rod 39 on which is pivotally mounted a rocking lever forming an interrupter, a branch 40 of which lever bears against a disc 42 keyed on the shaft 30 and tne other branch 41 of which carries a contact 43 which is kept apart from a contact base 44 by a spring 45.
  • the spring 32 tends to displace the shaft 30 in the direction of the arrow 46 and to keep it in contact with a ball stop 4'7 carried by the branch 29'.
  • this device As shown in this figure, this device, the motive pm of which is not shown and which may be a spring actuated chronometer of any suitable construction, is provided with a disc 48 carrying on its periphery a conducting band 49; this disc 48 is mounted on the shaft 50 of the chronometer on which is also mounted a toothed wheel 51 8(1 gearing (direct or by intermediary wheels not shown) with a toothed wheel 52 fixed on a shaft 53; this wheel 53 further is in mesh with a wheel 54 keyed on a shaft 55.
  • the disc 48 is provided with a boss 56 cooperating with a projection 5'7 formed at the end of a lever 58 adapted to pivot on an axle 59 carried by a support 60.
  • auxiliary circuit is formed as shown in Figs. 3 and 6.
  • This circuit comprises two conductors 61 and 61 bridging the conductors l5 and 16.
  • a contact bridge 62 is inserted, this contact bridge being formed by two spring contacts 62 (Figs. 5 and 6) between which a projection'formed on the disc 48 is engaged when the said disc is at rest.
  • an electromagnet 63 is inserted and arranged relatively to the lever 58 so as to attract the said lever, when it is energized and to release the boss 56 of the disc 48 from the projection 5'7.
  • the lever 58 carries a contact 64 cooperating with a terminal 65 to which is connected the extremity of a conductor 66 forming part of a circuit including the motor M and a source of electricity such as a battery S
  • a blade 68 connected by a conductor 69 to the conductor 66 connecting the battery S to the contact 64.
  • This circuit S 6664-65-6&MS can be closed by the blade 68, the band 49, a brush '70 and a conductor '71 connected to the conductor 66 when the disc 48 is rotated, notwithstanding the interruption at the contact 64.
  • the wheel 54 comprises an'insulated toothed sector '72 and the axles of the wheels 52 and 54 are interposed in the circuit comprising the conductor 3'7 and 3'7 and the distributor 36 so that the current can only pass through the wheels 52-54 when the insulated sector '72 of the wheel 54 is not in contact with the teeth of the wheel 52.
  • the device thus constructed works the following manner:
  • the sheet carrying the graphic (which is written for instance with an ink adapted to render the transmitting sheet conducting at the spots where the said ink is applied) is wound on a cylinder 5 arranged parallelly to the cylinder 5 between the uprights 2 and 4 and adapted to rotate freely. From this cylinder 5 it passes to the cylinder 5 on which it is maintained by simple adherence or preferably by little projections meshing with suitable perforations in the marginal portions of the sheet according to the well known method used in cinematographic devices to secure the movement of the film. After having surrounded a portion of the periphery of the cylinder 5, it is guided on a guiding roller 5 from which it remains freely suspended, thus surrounding the cylinder 5 just like a sheet of paper surrounding the roller of a typewriting machine.
  • a sheet of paper suitably prepared and adapted to be discolored under the influence of the current is similarly passed around a portion of the periphery of the cylinder s. v 1
  • the circuit comprising the conductors 37 and 3'7 closes also in such a manner that the current of the source S is sent through the electromagnetic clutch 35 through the distributor '36.
  • the pulley 2'7 is consequently attracted tothe contact 14, the cylinder 5-, the circuit breaker 44-43 ofthe receiving apparatus to return to the second pole of the battery S, through the line conductor 15.
  • an apparatus for transmitting and recordmeans for displacing the contact element along' the generatives of the cylinder comprising driving means for moving the contact element in one direction only, means for returning the contact eleinent to its initial position, means for partially rotating the cylinder about its axis upon the return of the contact element to its initial position, clutch mechanism for connecting and disconnecting the contact element and the driving means, and clock mechanism for controllingthe operation of the driving means.
  • the combination comprising a cylinder mounted to rotate about its longitudinal axis, a movably mounted carriage adapted to be displaced along the generativ s of the cylinder, a contact element mounted on e carriage and cooperating with the cylinder, driving means-tor moving the carriage in one direction, means for returning the carriage to its initial position, means for partially rotating the cylinder about its axis upon the return'of the carriage to its initial position, a clutch mechanism for connecting and disconnecting the carriage and the carriage moving means, a clock mechanism acting on said clutch mechanism whereby the duration of the displacement of the carriage in one direction under the action of the carriage driving means is dependent upon the clock mechanism.
  • the combination comprising a cylinder mounted to rotate about its longitudinal axis, a movably mounted carriage adapted to be displaced along the generatives of the cylinder, a contact element mounted on the carriage and cooperating with the cylinder, carriage driving means for moving the carriage in one direction only, means for returning the carriage to its initial position, means for partially rotating the cylinder about its axis upon the return of the carriage to its initial position including a ratchet secured to the cylinder and a pawl cooperating therewith and positioned to be actuated upon the return of the carriage, a clutch mechanism for connecting and disconnecting the carriage and the carriage driving means, a clock mechanism acting on the clutching mechanism whereby the duration of the displacement of the carriage under the action of the carriage driving means is dependent upon the clock mechanism.
  • the combination comprising a cylinder mounted to rotate about its longitudinal axis, a movably mounted carriage adapted to be displaced along the generatives of the cylinder, a
  • an apparatus for transmitting and recording graphics comprising a cylinder mounted to rotate about its longitudinal axis, a movably mounted carriage adapted to be displaced along the generatives of the cylinder, a contact mounted on the carriage and cooperating with the cylinder, a rotatably mounted pulley, a flexible cable secured to the pulley and the carriage, driving means for rotating the 100 pulley to move the carriage from one end of the cylinder to the other in one direction only, electromagnetic means for connecting and disconmeeting the pulley to the driving means, means for returning the carriage to its initial position, 105 means for partially rotating the cylinder about 7 its axis upon the return of the carriage to its initial position, a clock mechanism controlling said electromagnetic means whereby the duration of the displacement of the carriage in one direction is dependent upon the clock mechanism.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Mechanical Operated Clutches (AREA)
US499881A 1929-12-10 1930-12-04 Apparatus for the transmission at alpha distance of graphics Expired - Lifetime US1929485A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE1929485X 1929-12-10

Publications (1)

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US1929485A true US1929485A (en) 1933-10-10

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US499881A Expired - Lifetime US1929485A (en) 1929-12-10 1930-12-04 Apparatus for the transmission at alpha distance of graphics

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US (1) US1929485A (xx)
BE (1) BE375552A (xx)
FR (1) FR707290A (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511837A (en) * 1950-06-20 Combined facsimile transmitter recorder
US3541580A (en) * 1967-11-11 1970-11-17 Toho Denki Co Ltd Apparatus having a scanning device on a sloped plane

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511837A (en) * 1950-06-20 Combined facsimile transmitter recorder
US3541580A (en) * 1967-11-11 1970-11-17 Toho Denki Co Ltd Apparatus having a scanning device on a sloped plane

Also Published As

Publication number Publication date
FR707290A (fr) 1931-07-06
BE375552A (xx)

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