US853755A - Apparatus for transmitting to a distance real optical images. - Google Patents

Description

No, 95391755. PATETTED MAY 14, 19o?. E. Bama MPARATUS FUR Tmmmifjm@ To A DISTANCE REAL OPTIGAL IMAGES- APPLOATION FILED JULYlO. 1905.

lmm @VMMMKH ATTORNEYS y EDOUARD BELIN, OF PARIS, FRANCE.` I

tAPPARATUS FOR4 TRANSMITTING T0 A DISTANCE REAL OPTICAL IMAGESF i No. rstarts.

specification of Letters raient.

Patented May 14, 1907.

Application filed July 10,1905. Serial No. 269.134.

To @ZZ whom it may concern:

. Be it known that I, EDOUARD BELIN, a citizen of vthe Republic of France, engineer, whose full postal address is 60 Boulevard de Clichy', Par1S,-France, have invented certain s new and useful Improvements in the A paratus for Transmittin to a Distance eal l Optical Images, of whichV the following is a specification.

This invention consists in improvements in the method of and apparatus for the transmission to a distance of real optical images forming' the subject of Patent 844,086, Feb. 12, 1907.

The present improvements relate more particularl 1. To the combination as a whole of t e apparatus for carrying out the method with t e object of rendering its use more practical; l2.` To an exclusively electrical means for enabling the image to be recorded by means of perforations formed in a band of suitable material.

Reference will now be made to the accompanying drawings in which:

Figure 1 1s a diagrammatic view showing the combination as a whole Fig. 2 shows dia- .'grammatically the arrangement .of the electric mechanism utilized for periorating the recording band. Fig. 3 is a detail on an enlarged scale of the essential part of this arrb nlgement. v e system always comprises two stations,

viz: a transmitting station and a receivin or 1 recording station, but laccording to the 1m- .proved arrangement, shown in Fig. l, the

transmittingv apparatus A has the great advantage of only comprising a dark chamber 1 and a collector or multiple commutator 2, all

the other parts being transferred to the receiving station. The transmitting apparatusalso does not require the use of a local current, it. simply utilizes the line current which may be very weak.

The chamber 1 has no particular improvement; it is provided with any objective 3 and contains a mirror by. means pf which the 'einer ent luminous grou of ra sis rejected g P P on to selenium elements suitab y arranged in the interior ofl the said 'chamber as shown in Fig. l of Patent 844,086. The ends vof the metallic wire which enter into .the constitution of each of these sensitive elements are res ectively connected .with terminals 4 and 5.

e terminals 5j are in electric communication with one of the line wires proceeding to the source of electricity 10.

. Patent/844,086 above mentioned, and electromagnet 9 and the recording apparatus proper. The line current brought by the wire 7 passes through one of the windings of thefspecialfrelay 8 in the manner indicated in the patent hereinbefore mentioned,'it then traverses the coil of the electro-magnet 9 and the circuit is closed at 10 with the` source of electricity after having passed through the switch 11.

- According to the improved arrangement,I a local current arising from a special source 12 is available at the receiving station. In this particular circuit which is represented by the wires 14 and 15 the second winding of the special relay 8 is arranged, also a switch 13, the receiving collector which always work synchronously with the transmitting collector 2, and finally the recording mechanism (printing and perforating apparatus.)

lfliorlci'n'gr-The moment the transmitting collector 2 brings a sensitive element of the chamber 1 into the line circuit, the latter is closed. may be seen in patent 844,086

above mentioned, the intensity of the current necessarily varies according tothe degree of illumination of the element placed in circuit. When the intensity, by reason of the action of the special relay 8 which introduces into the line. circuit an automatically variable resistance, is sufficient to excite the 'electro-magnet; 9, the armature of this latter is attracted, establishing contact at 13 and thus closing the local circuit of the receiving station. vThe local current then passes into the collecting apparatus of the receiver, but

this current is itself variable according to the position occupied by the windings of the spelcial relay 8. The receiving collector now brings into -the local circuit the recording mechanism correspondingl to the selenium element in use and this mechanism works eX- actly under the same conditions as before. The electro-magnet 9, at the same time as it vlcloses the circuit of the receiving station,

breaks the line circuit by opening the switch 11. As the line current no longer passes into the electro-magnet, this latter allows its armature to resume its initial position,

the switch 13 is opened and breaks the local circuit, While the line circuit is again closed by the .closing of the switch 11. At this moment the collector 2.places in the line c1rcuit another selenium element and the various phases which have just been described are'renewed and so on successively.

In order to record the images transmitted, instead or utilizingprinting cones,.or perforations obtained by means of needles, an absolutely perfect recording is obtained by forming perorations in a suitable band by means of induction sparks which are caused to spring between the electrodes suitably arranged on the one side and on the other of the said band. It has infact been noticed that if for instance7 a sheet or paper be placed in the track or an induction spark, this latter forms a perforation therein. The perforations thus obtained are strictly circular and the diameter is proportionate to the variations of the induced current which has produced the spark. In order to employ this means of recording the real optical images transmitted by the system hereinbefore described, the arrangement shown in the drawings has been designed. Figs. 2 and 3 relate to this special arrangement. At the receiving station, an induction coil 18 is introduced in the local circuit passing through the special relay 8 and switc 13; in the secondary circuit constituted by the wires 16 and 17, starting from the coil 18, there is located the receiving collector or multiple commutator 19 which works synchronously with the collector 2 oi the transmitting apparatus, also the perforating apparatus. This latter comprises on the one hand a certain number or points 22 (Fig. 3) insulated from one another and each having a terminal 2() which serves for connecting them electrically and respectively with one of the con- -tact elements of the collector 19 which brings successively into the secondary circuit the point 22 corresponding to the selen- `ium element for the time being placed in circuit by the transmitting collector 2 (Fig. 1.)

On the other hand the arrangement is cornpleted by aseries of blades or strips 21 preierably insulated from one` another and each arranged opposite a point 22 as shown in Fig. 2. They are provided with a terminal 23 and these latter are all connected with a suitable wire 17 of the secondary circuit. The receiving band 24A passes between the blades 21 and the extremities or the points 22.

The apparatus being in action, when the magnet 9 attracts its armature in the manner hereinbefore indicated,` the switch 13 is closed, the local current of the receiving station passes into the coil 18 which, in its turn, sends a current through the collector 19 to the perforating device a. At this moment, the collector 19 connects the desired point 22 l the blade 21 which faces it.

and a spark springs between this point and This spark per orates the receiving band 24 and the hole produced has a diameter proportionate to the variations of the current causing the spark. f y

This current varies, as the local current emanating from the source 12 itselr` varies according to the position of the contact rollers of the special relay 8 as has been already mentioned. A series of periorations varying in size according to the various selenium elements of the transmitting apparatus and consequently to the points of the real optical image which is to be 'reproduced at a distance as are thus obtained on the recording band 24. Of course the displacements of the band 24 relative to the points 22 must be combined in such a way as to obtain a suitable .registration of the images in the manner provided.

I claim as my invention i 1. An improved system of transmitting to a distance real optical images, comprising a receiving station with recording apparatus and a transmitting station having a dark chamber with selenium elements therein and a transmitting collector or multiple commutator, the receiving station being in the same electric circuit with the transmitting station, said receiving station having a relay adapted to cause a local current to undergo variations oi intensity proportional tothe variations of intensity of the line current, in combination with a receiving collector through which the said local current passes Jfor the purpose of operating the recording apparatus, said collector or multiple commutator moving syn* chronously with the commutator of the transmitting station..

2. In a system of transmitting to a distance real optical images, comprising a receiving station having a recording apparatus, comprising a band and means for forming perforations of variable diameter in they recording band by means ofelectric sparks, the diameter of the perforations being proportional to the current impulses arriving at the receiving station.

3. In a system of transmitting to a dis-- tance real optical images, lcomprising a receiving station having a recording apparatus, comprising a band and means for forming perorations of variable diameter in the recording band by means of electric sparks, a secondary circuit having anl induction coil excited by the current serving the receiving station for producing the sparks, and a collector or multiple commutator in said station being arranged in the secondary circuit.

4. In a system for transmitting to a distance real optical images, an electric circuit connecting a transmitter and a receiver, a transmitter by which currents automatically varying in intensity in proportion to differ- Ioo A IIO i image are transmitted tov the receiver, a reences in intensity f the 4light rays frein the l In testimony whereof I have signed my name to this specification, in the presence of ro two subscribing witnesses.

EDOUARD BELIN.

eeiver comprising a band and means actuated by said variable current for forming perforations therein of varying diameter propor- Il Witnesses:

-ti0ned to the variations in intensity 0f the current' impulses reeelved from thel trans ANTONINMONTEILHET,

H. C. CoxE.

mitter, substantially as described..

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