US1746331A - Mechanical telautograph - Google Patents

Description

Feb. 11, 1939.

Filed Aug, 3, 1928 Patented Feb. 11, 1930 MAX AFTERG'UT, OF BERLIN-SCHONEBERG, AND JEHUDA PRASHKER, F BERLIN- CHARLOTTENBURG, GERMANY MECHANICAL TELAUTOGRAPH Application filed August 3, 1928, Serial No. 297.354, and in Germany August 3, 1927.

a In accordance therewith the improved devlce or apparatus comprises, in general, a y

transmitting apparatus and a reproducing apparatus or a transmitter and a receiver and the interconnection between these two appa- V ratuses iseffected by means of cables, or the like, preferably B-owden transmissions or Wires,

A main feature of the present invention re sides in that the movements of the writing member both of the transmitter and of the receiverstation are resolved into two intersecting components and the movements corresponding to said components are transmitted by cables independently of each other.

One of the objects of our invention is the provision of a device which will reproduce writings at a point distant from that at which they are originally made.

" Another object of our invention is the construction of a device of the character described in which the transmitted writings may be made on a plane surface such as a table top.

Still another object of our invention isthe production of-a device which is simple to op- :erate but which exactly re roduces the writings made either in magni ed, diminished or normal form.

With the above recited and'other objects in view, theinvention resides specifically in the novel construction set forth in thefollowing specification, particularly pointed cut in the appended claims and illustrated 111 the accom anying drawings, itbeing understood, that t 1e rlght is reserved to embodlments other than those illustrated therein, to the full extent indicated byjthe general meaning of the terms in which the claims are expressed.

In the accompanying drawings forming a part of this specification and showing, for purposes of exemplification, a preferred form and manner in which the invention may be embodied and practiced, but without limiting the claimed invention to such illustrative instance:

Figure 1 is a diagrammatic view of the transmitting (or receiving) apparatus;

F1gure2 illustrates the transmitting apparatus and the receiving apparatus in mutual relation to each other;

Figure 3 is a partial or fragmentary view of the writing device of the receiving apparatus and Figure 4 isa partial or fragmentary view of the writing device of the transmitting apparatus.

Referring to Figure 1 the character 1 designates a column adapted tobe rotated about itsvertical axis and which is supported near its two ends by a U-shaped post or standard 2. The one end of the column 1 is provided with an arm carrying a grooved roller or pulley 3 adapted to revolve about a horizontal axis or pivot and which is firmly connected with a writing arm 45, while the other end of the column is centrally fixed to a horziontally running grooved roller or pulley 5. The free end of the writing arm '1 carries the writing,

member which will be described more in 'detail hereinafter. Thewriting member is constructed and adapted to accomplish both a vertical circular movement about the horie zontal axis of rotation of the grooved roller 3 and a horizontal circular movement about the vertical axis of the column 1. Either movement of the writing memberthus isjdecomposed into these two circular components which are in perpendicular relationship with regard to each other. a

The transmissionof the vertical component is effected by means of a cable placed and guided in the groove of the roller 3.

This cable passes through the hollow shaft of the rotatory column 1 on the one hand directly and on the other hand through the agency of the deflecting roller 6 and firmly connected with the cables of the two Bowden transmissions 10 and 11 after having been changed in direction by means of the two reversing rollers 8 and 9 mounted in the socket or base of the apparatus. The two Bowden cables 10 and 11 are, at the opposite end, attached to a rope or cable which is likewise placed in a corresponding grooved roller 3'of the apparatus located there, so that any angular movement of the one grooved roller will innnediately cause the other grooved roller to perform an analogous angular movement in the same direction.

The horizontal component of the movement of the writing member causes the column 1 to turn about its vertical axis, and this turning movement is transmitted in a similar manner to the corresponding grooved roller of the receiving apparatus by means of a rope or cable placed and running over the grooved roller 5. Thus the two apparatuses are associated with each other by means of two pairs of ropes or cables which will act independently of each other to transmit the components of the movement of the one apparatus to the other apparatus, so that the writing movement of the receiver constitutes a resultant of thesaid two components. It 'will be seen that by suitably dimensioning the diameter of the said two grooved rollers it will be possible to transmit the writings or signals in their original size or on a reduced or an enlarged scale.

Figure 2 illustrates the two apparatuses in their mutual action. 12 designates the transmitting apparatus and 13 denotes the receiving apparatus, the two apparatuses being interconnected by the two pairs of ropes or cables l t and 15, respectively. It will be seen in Figure 2 that the relative location of the two apparatuses is absolutely independent of each other. The apparatus comprising the receiving station is generally similar to. that comprising the sending station.

In Figure 3 the character 16 indicates the extremity of the writing arm of the. receiving apparatus having a bore for the reception of the writing pin or stylus 17, properly speaking, the latter being provided with a longitudinal capillary bore and equipped or connected at its rear end, with a reservoir or container 18 for ink or the like. A spring 19 is provided for pressing the front end of the stylus against the'writing surface 20. Rigidly connected with the stylus is an extension or projection 21 on which the envelope or casing 22 of a Bowdcn transmission terminates whereof the cable 23 passes,

through the said projection 21 and is connected, at its end. with a sleeve 25, a spring 24 being inserted intermediate between the two connected members. The sleeve 25 is wards the writing surface in parallelism to i the stylus so as to prevent the stylus from coming in touch with the writing surface when the projection 26 occupies the position shown in Figure 3. Consequently the stylus will come in contact with the writing surface only when the projection is withdrawn on the stylus by means of the Bowden transmission.

In Figure 4; the character 27 denotes the extremity of the writing arm of the trans mitting apparatus having a longitudinal bore 28 for guiding the stylus holder 29 properly speaking. The latter is connected, by means of a universal joint 80, with a sleeve 31 for the reception of a lead pencil 32. The sleeve 31 in turn is connected with a guiding sleeve 33 in which a pin 34 is mounted and adapted to slide therein. The pin 34 is provided at its lower end with a ball 35 and connected with the cable 23 of the Bowden transmission (see Figure 3), so as to cause the writ-' pin in the sleeve 33 actuating an electrical contact for closing or opening the circuit .of an electro-magnet 36 attached to the receiving apparatus and whereof the armature 37 is connected with the cable 23 of the Bowden transmission, (see Figure 1).

A device constructed and arranged as herein described is adapted for various uses of transmitting writings or signals from one station to other places situated at distances remote therefrom, such as for example in case of delivering lectures, on ships or other vehicles and for similar purposes and particularly in cases where it is desired to transmit signals on an enlarged or reduced scale.

In the former case, that is to say, when the signals are to be transmitted on an enlarged scale, it will not be necessary anymore for the lecturer to write his explanations on a black board since he now will be enabled to have his writings reproduced without any trouble from his reading desk and at any desired enlarged scale by operating a transmitting device.

A device according to the present invention, however, is also particularly useful and applicable for advertising purposes. In such -a case the transmitter 12, (see Figure 2),

may be put up in a room which is not visible to the public, while the receiving or reproducing apparatus isto be placed in a showwindow and may be enveloped in and draped to constitute a doll with the writing arm enclosed in one arm of the doll and the rotary column enclosed in the body thereof. Thus the arm of the doll will reproduce on a writing surface visible to the public, all those writings and signals whichthe person in attendance of the transmitting apparatus writes down for the'reproduction' purpose;

We are aware that minor changes in the" arrangement, construction and combination of the several parts of our improved apparatus or plant can be made and substituted for those herein shown and described without in the least departing from the nature and principle of the invention. Nor does it seem necessary to burden this specification with a detailed exposition of the advantages which the invention possesses, for they will be apparent to those skilled in the art to which this invention relates. Furthermore a detailed description of the operation of the said apparatus or plant is deemed unnecessary and is therefore omitted in the interest of brevity.

What we claim is 1. Apparatus for transmitting writings from one station to a second station at a distance therefrom, comprising a transmitter and a receiver each provided with a writing member, a pair of cables interconnecting said writing members with each other and positively transmitting the movement of the writing member of the transmitter to that of the receiver, said transmitter and receiver each comprising a pivoted carrier, an actuating arm for a writing member pivoted thereon, said arm being movable at every angular position of the carrier in a plane parallel to the axis of rotation of said carrier.

2. Apparatus for transmitting writings from one station to a second station at a distance therefrom, comprising a transmitter and a receiver each provided with a writing member, a pair of cables interconnecting said Writing members and positively transmitting the movement of the writing member of the transmitter to that of the receiver, said transmitter and receiver each comprising a rotatable pulley forming a guide for one of the two cables, ail-actuating arm for a writing member firmly mounted thereon, a rotatable carrier, said pulley being mounted thereon, the axis of rotation of said carrier being perpendicular to the axis of said pulley, a second pulley secured to said rotatable carrier for rotating the same about its" axis and forming a guide for the second cable.

3. A receiving or reproducing device for use in connection with a transmitting apparatus as claimed in claim 2, and having flat writing surfaces, wherein said writing member is adapted to be elastically displaced in the longitudinal direction of the actuating or writing arm.

4. In areceiving or reproducing device for use inconnection with a transmitting apparatus as claimedin claim 2, a writing member holder and means mounting the same for displacement in the longitudinal direction of the actuating or writing arm so that only those components of the writing movements will be transmitted which are in parallelism to the flat writing surface.

5. Apparatus for transmitting writings from one station to a second station at a distance therefrom as claimed in claim 2, in combination with means for synchronously interrupting the writing movement, comprising a pin slidable on the writing surface of the transmitting device, a Bowden transmitting connection operable by said pin when the latter is displaced in the direction of the longitudinal axis of the actuating arm, and

electromagnetic means cooperating with said Bowden transmitting connection for raising and lowering the writing member of the receiver synchronously with the raising and lowering of the writing member of the trans mitter.

6. Apparatus for use in transmitting writings from one station to a second station, disposed at a distance from said first station, said apparatus including a transmitter comprisinga writing member, mounting means pivoted for rotation about an axis, carrying means for said writing member pivotally supported on said mounting means for rotation about an axis perpendicular to said first mentioned axis, a receiver similar to said transmitter and means cooperating with said mounting means for transmitting the movements of said writing member of said transmitter to the writing member of said receiver.

In testimony whereof, we affix our signatures.

MAX AFTERGUT. JEI-IUDA PRASHKER.

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