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

Description

0a. 10, 1933. DE 1,929,485

APPARATUS FOR THE TRANSMISSION AT A DISTANCE OF GRAPHICS Filed Dec. 4, 1930 2 Sheets-Sheet 1 INV ENTOR' GEORGES DELBHEF "ATTORNEY Oct. 10, 1933. DELCHEF 1,929,485

APPARATUS FORTHE TRANSMISSION AT A DISTANCE OF GRAPHICS Filed Dec. 4, 1930' 2 Sheets-Sheet 2 \NVENTOR szoasss uncut? .MMW

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1,929,485 APPARATUS FOR THE TRANSMISSION AT A DISTANCE OF GRAPHICS Georges Delchef, Brussels, Belgium Application December 4, 1930, Serial No. 499,881,

and in Belgium December 10, 1929 5 Claims. ((51. me-13) This invention relates to an apparatus for the transmission at a kind;

Devices of that kind are known in which con- 5 tacts making part of a'single circuit are displaced substantially in synchronism with respectto transmitting or receiving surfaces.

In those devices, 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;

Moreover, it is known to use, as a transmitting and receiving surface, cylinders having a continuous movement of rotation and on each of which a contact is displaced according to a helicoidal path, in such a manner that the surface adapted '20 to be used for the transcription of the message is limited to the peripherical surface of the 7 cylinder.

This inconvenience is particularly important when the user to whom the message is to be trans- 26 mitted is absent or he is not in a position to control the area of the receiving sheet which remains free for the reception of the messages which are transmitted during his absence. Moreover in view of the difilculty to secure the rotation of the two cylinders which are used as transmitting and receiving surfaces at identical speeds the points touched by the contacts at the same moment on the transmitting cylinder differ from those touched on the receiving cylinder.

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. I

with this object in view, my invention essentially consists in the special arrangements and combinations of parts hereinafter fully described and pointed out in the appended claims. Referring to the annexed drawings:

Figure 1 is a diagrammatical side elevation of an apparatus constructed according to the present invention. I

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.

Figures 4 and 5 show two details of construction.

Figure 6 shows diagrammatically the cooperation of the transmitting and of the receiving apparatus.

In the example shown, 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,

preferably obliquelyarranged and of an intermediary upright 4.

Between the uprights 2 and 4 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.

The several uprights 2, 3 and 4 being arranged obliquely relatively to the base plate 1, the longi= tudinal axis of the cylinders, as shown in Figure 1, makes an angle with the horizontal direction of the base plate 1 and is in an ascending direction between the uprights 2 and 4.

In front of the cylinder 5 extend two parallel rods 9 and 10 which are mounted in the uprights 2 and ,3 and which carry and guide a carriage 11. This latter is provided with a terminal 12 carrying a contact bearer 13, the contact 14 of which is adapted to follow the generatrices of the cylinder 5, when the carriage 11 is displaced along the rods 9 and 10.

Moreover, on the end of cylinder 5 bears 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.

vTo this end, 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. When the carriage 11 after having been displaced along the rods 9-.10 as will be hereafter explained, is returned to its initial or starting position, the projection 19 slides on the inclined plane 24 and "the lever -20 which is displaced in the direction of the arrow A (Fig. 3) is caused to pivot around the axis 21 so as to' produce by aid of the pawl 22, acting in the teeth of the wheel 23, the required rotation of the cylinder 5.

In the example shown, it hasbeen supposed that the ascending movement of the carriage is obtained 'by means of an electric gear comprising an electromotor M (Fig. 3) cooperating with an electromagnetic clutch of any known kind and acting ona pulley 27 (Figs. 1 and 3) to wind up arope 28 connected to the carriage 11.

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.

In alignment with the shaft 30 extends the shaft 34 of the electromotor M mounted on a suitable support (not shown). On this shaft 34 is keyed 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'.

In order to assure that the strokes of the car- .riage 11 take place respectively in the receiving and in the transmitting apparatus within cor- 70 responding periods of time, the clutching of the pulley 2'7 is placed under the control of a chronometrical device or clock work, the general featumor which are shown in Fig. 3.

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.

Between the conductors 15 and 16 an 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. In one of the said conductors 61 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. In the second conductor 61 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 On the other hand, on an insulated portion 67 of the band 49 rests when the disc 48 is in its resting position, 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.

At the receiving station 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 manner oi transmitting a message will now be explained with reference to Fig. 6 taken conjcintly with Fig. 3. The user of the transmitt-ling apparatus has only to close the switch 16 The current of the battery S then flows through the conductor 61 and the contact bridge 62 which is closed the disc 48 of the clock work being at rest; it then divides between the line conductor 16 leading to the receiving apparatus, and the second conductor 61 leading to the electromagnet 63 wherefrom, it returns to the battery S The other fraction of the current passing through the line conductor 16 arrives to the receiving apparatus where it is conducted clock-work are released by the oscillating levers '58 which are attracted by the electromagnets 63.

.As a consequence these discs begin to rotate and the projections on these discs break the circuit passing through the conductors '61 at the contact bridges 62. On the other hand on account of the attraction of the levers 58 by the electromagnet 63 the contacts 64-65 closes thus causing the current of the source S to pass through the motor M following first the conductor 66 passing through the contacts 6465 and returning to the source S after having passed through the motor and then, as soon as the disc has made a partial rotation, through the blade 68, the band 49, the brush 70, the conductor 71, to return to the battery S through the conductor 66. The rotation of the hiss 48 has also as a result to cause the wheels 52-'54 to rotate. At the moment that the insulated sector 72 has left the gearing point of the wheels 5254, 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.

The pulley 27 which as already stated has been attracted by the clutch 35 .being thenrotated,

the carriage 11 is drawn upwards along the rods 9 and 10.

j The current coming from the source S passes then through the conductor 15, the cylinder 5, each time the contact 14 meets a conducting portion of the graphic.

This current impulse reaching the receiving apparatus in the manner described passes ting oil of the circuit S The disc 35 no longer .being magnetized, the axle 30 is displaced under the action of the spring 32 in the direction shown by the arrow 46; the pulley 27 is thus released and the circuit breaker 4344 is returned to its starting position thus cutting ofi' the external circuit of the source S The rotation of the pulley 27 being interrupted the ascending course of the carriage 11 is completed and the latter returns to its starting point under the action of the pulley 28 subjected to the action of the spring 28 At the end of its descending course, the camlike projection 19 meets the projection 26, causes the lever 20 to rotate and by aid of the pawl 22 causes the wheel 23 and consequently the cylinder 5 to rotate the value of one tooth of the wheel 22.

Moreover the boss 56 meeting the projection 57 after one revolution of the disc 48, the wheel 48 stops so that all the parts depending from the disc 48 are placed again in the starting position,

ready for a further transmission.

As it will be easily understood each revolution of the wheels 52, 54 must correspond to the total of the following times:

(a) The time which is necessary for the carriage 11 to be displaced upwardly a distance corresponding substantially to that of the length of the cylinder 5;

(b) The time which is necessary for the return of the carriage 11;

(c) A stopping time sumcient to compensate the eventual differences in the returning periods.

As a result if in this device'differences occur in the displacements during the upwardor downward strokes oi the carriage 11, these diflerences cannot be added as indeed the transmission takes place by successive sections, each transmission of one section beginning ineluctably from the same spot. In consequence the carriages may displaced .at non-identical speeds which may vary eventually from one transmission to another.

What I claim is:

1. In 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.

2. In an apparatus for transmitting and recording graphics, 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.

3. In an apparatus for transmitting and recording graphics, 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.

4. In an apparatus for transmitting and recording graphics, 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 carried by the carriage and cooperating with the cylinder, a rotatably mounted pulley, a flexible cable secured to the carriage and the pulley, driving means for rotating the pulley to move the carriage substantially from one end of the cylinder to the other in one direction only, clutching mechanism for connecting and disconnecting the pulley and the driving means, means for returning the carriage to its initial poistion, means for partially rotating the cylinder upon the return of the carriage to its initial position, a clock mechanism acting on said clutching mechanism'and means for placing the duration of the displacement of the carriage under the action of the carriage driving means under the action of the clock mechanism.

5. In an apparatus for transmitting and recording graphics, 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 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.

GEORGES DELCHEF.

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