US1128492A - Telautographic apparatus. - Google Patents

Description

H. W. (TNEILL. TELAUTOGRAPHIC Ama-Rm Us. APPLIUATION FILED :"llx

Patented Feb. 16, l

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"UNITED sfrarns PATENT carrer.. Y

HENRY W. ONEILL, OF BROOKLYN, NEW YORK, ASSIGNOR T0 GRAY NATIONAL TELAU TOGRAPH COMPANY, OF NEW YORK, N. Y., A CORPORATION OYIGINLA.

TELAUTOGRAQPHIC AP'PARATUS.

Specification of Letters Patent. i Patented Feb, 16, 1915? Application filed February 24, 1812. Serial No. 679,588.

T0 all fio/wm it may concern.'

Be it known that I, HENRY NV. ONEILL, a citizen of the UnitedStates, residing at Brooklyn, county of Kings, and State of 'New York, have invented certain new and useful' Improvements iii rlelautf'igraphic Apparatus, fully described and represented in the following specication and the accompanying drawings, forming a part of the same.

This invention relates .to improvements in telautographs of the variable currentstrength type, suoli as shown and described, for eXample,in Letters Patent of the United States No. 954,150, granted to George S. Tiffany April 5, 1910. Such telautographs are usually provided with means for vibrat-.A ing the pen-moving parts in the instrument scribed in the' application executed of even date herewith by George S. -T iflany, Serial No. 679,598. These generators give otf alternating waves or surges, which, in a telautograph, seriously interfere withvthe sensitive polarized pen lifter relay which controls the raising and lowering of the receiving pen, in accordance with like movements of the transmitting tracer. The second branch of the present invention has reference to means for absorbing these surges or waves.

In the accompanying drawings-Figure l is a diagrammatic view of a station shown, for convenience, in transmitting condition; Fig. l is a like view of `another station shown, for convenience, as receiving from the station illustrated in Fig. l.

For convenience, I have,iin these drawings, illustrated the improvements constituting my invention in connection with telautographic apparatus shown and described in the aforesaid Tiffany application, but it will be understood, ofcourse, that the present improvements are not to .be limited to this particular ,form of telautographic apparatus.- For convenience in the desemption which will now `be fven of my improvements, I have applied-itc ythe drawings the same reference characters as those applied to corresponding parts in the drawingsof the aforesaid application of Geor e S. Tiffany. Only a general ydescription wi l be given of the apparatus shown, except those parts of it to which the present improvements relate, reference being madeto the aforesaid application of `George S. Tiffany for a detailed description' of other parts of the apparatus. i

Each station'cornprises a transmitter and a receiver, and in the number, relative arrangement and construction and operation of parts, one station is the counterpart of the other. Therefore, in the following description references will be made to either' station according as convenience in tracing lcircuits may dictate, corres onding refer- Each transmitter comprises a pair of,A rlieostats l, 2, included in a. normally openlocal circuit, and a source of electric. en?- ergy, for example, a motor generator 3, the

negative pole of which is grounded at fi,

this local current-supplying circuit being.

controlled by a. master switch mechanism designated 5 as a whole, controlling contacts' 8, 36, 40, which normally occupy-,the

tion in which they are shown in 2,)111

which position the station is in receivingy condition, and when out of that positi in Fig. 1, where the station is in .,traiisnai-.tl

ting condition. Contact r8 in the pos'titiii inwhich it is shown in Fig. Al, closes'acirv' Ycuit from generator 3, traced as follows:

wire C. contacts 7, 8, wir-est), 1.0, V11 to right rheostat l, and from wire 11, by wires 12, 13, 1-1 to left i'lieostat 2, and from right rlieostat l, by wires 15, 16, and, from left rheostat Q, b v wires 17. 1S, 16, to tlie'negnftive pole of generator 3. When Contact 8 is in\this position, contacts 36, 40 vengage stationary contacts 43, 4i, thus closing right and left line tracer circuits from the transmitter of such station to the receiver of the distant station, as well as to .its .own receiver. aforesaid application of George S. .',Diny that it vwill be unnecessary to describe it '9o cupy the position in which they are' sli'pwn i This is so fully described fin the here beyond merely tracing the right and left circuits, as thus closed, from the right and left rheostats 1, 2, of the transmitter' of Fig. 1, to and through the receiver of Fig. 2, namely, the receiver' of the distant station. Such circuit for the right line con- .sists of contact 19, tracer arm 21', Wire 47, secondary winding 48 of an induction coil, Wire 50, contact 43, contact 36, Wires 87, 38, 39 (Fig. 1), wires 39, 38, 337, contact 36, contact 45, wire 51, right relay 52, Wire .53, pen moving coil 54, wires 55, 56, and 16, to ground at 4 Fig. 2. Such circuit for `the left line consists of contact 20, tracer arm 22, Wire 57, secondary Winding 58 of the induction coil, Wire 59, contacts 44, 40, Wires 41, 42 Fig. 1), wires 42, 41, contacts 40, 46, wire 60, relay 61, wire 62, pen moving coil 63, and Wires 64, 65, and 16, to ground 'at 4.

It Will be understood, of course, that, as fullydescribed in the aforesaid Tiffany application, as the transmittingr tracer 23 is moved laterally in. Writing, currents, varying in strength in accordance with the posi tion of the contacts 19, 20, lengthwise oftherheostats 1, 2, will be shunted into the right and left main line ,circuits just described; that the coils 54, 68, of Fig. 2 Will be moved rectilinearly thereby, against the tension of springs not shown) tending to move themin the opposite direction, on the core 73 of the magnet 70,vwhich With its pole pieces, 71, provides a suitable magnetic Held for such coils, which` Held is excited from the generator 3 through a local circuit consisting of Wire 6, contact 7, Wire 92, wire 93, lock magnet 94, of a unison switch group fully described in the aforesaid Tiffany application, Wires 95, 96, 97, 98, 99, windings 100, 101, of field magnet 70", wires 102, 103, 104, spring contact 105 mounted on butI insulated from armature 106 of left'hand local circuit controlling relay 61, contact 107, Wires 108, 65 and 16, to the negative pole of the generator 3*. This circuit is o'pened'and closed, at a given station (as Fig. 2), at the contacts 105, 107, and is closed when another station (as Fig. 1) is transmitting to it and current is therefore on-the left main line just`described from such other station; relay 61 being then' energized and attracting its armature 106 which moves contact 105, into engagement with contact 107g. The rectilinear movement just referred to, of the coils 54, 63 will depend, in extent and direction, upon the strength, from time to time, of the currents traversing the right and 4left lines, and Will effect. in turn, through connections which are generally shown but need not be specifically described here, lateral movements of the receiving pen 33 corresponding, in direction and extent, tothe lateral movements of the transmitting tracer 23; all as fuily described in theaforesaid Tiffany application. Frictional resistance to movement of the coils 54, 63, and of the other pen moving parts, is, of course, met witlnand to overcome it, various devices and expedients have been' resorted to. The present invention relates to means for overcoming such frictional resistance, as before indicated. The means provided consists of a short circuiting buzzer, the magnet 214i of which is located in the receiving instrument and included in a manch of the local circuit hereinbefore described, for exciting field magnet consisting of wire 211" from said magnet, wires 242,1, winding of buzzer inagnet 240, wires 243, 244, and thence by u 1033, 104, Contacts'ltl", 107, and ivires 10S, 65, and 1G, of thc. field magnet circuit. -to the negative pole of generator 3^. 4.lhis branch circuit, with the field magnet circuit,.is closed only when writing currents are on line from the distant station, when by the energization of relay 61a contacts 105, 10?engage A shunt, (.onsisting of wire 245, armature Q46 of magnet 240, Contact 2473, wire 248, is formed, in this branch circuit, around magnet 2-10. ihcn, therefore, said magnet is energized and attracts its armature 211:66, such armature, by engagement with front Contact 217 will short circuit magnet 240% The latter will then release its armature 246, thus breaking this shunt circuit and reestablishing the circuit through the magnet;

and so on, so long as the local circuit through field magnet 70 closed. As the winding 101 is in multiple with buzzer 240 it follows that this winding will also be short circuited by armature 246 when it engages front contact 247. Therefore, the magnetic field in which the coils 54a, 63 are located will be maintained in a vibratory condition` which condition will be connnunicatcd by the coils to theparts connected therewith, so that the Whole pen moving group will be maintained in a. vibratory condition, thereby greatly reducing frictional resistance to their movement. Although the description of these vibrating means has been directed specifically, by refeience characters, to Fig. 2, because that station is shown as receiving. it will. of course, be obvious that i-t is equa/ily' applicable to Fig. 1, assuming that to bel in receiving condition. It will also be understood that, as vthe local receiver of a. station transmitting is also operating like the distant receiver, the pen moving parts will be vibrated in precisely the same way, and by corresponding means, as those of the distant receiver.

The system as thus far described providesv merely for the lateral movements of the receiving pen 33. Means are, of course, pro-- vided for effecting its movements to and' strip as the transmitter from the record tracer'ls so moved. The means shown here i ai a penflifter magnet 110,-which is energized and denergized by relay 1149, So as to cause the receiving pen to move,v respectively,

from and toward its record strip. The p enlifter magnet 110 is included in a branch of the field-magnet local circuit heretofore Y described, such branch circuit being traced as follows: Wire 111 from field magnet 70", pen-lifting magnet 110, wire 112a,loose colitact group 113, ' wires 115, 104, contacts 105, 107, and Wires 1083, 65, and 16, to the negative pole of generator 3. The loose contact group 113* includes a pair of con tacts 126, 127B, the inner ends of which engage and one of which is vibrated relatively to the other when a vibrating current passes through relay 1111a so as to, in effect, vbreak this circuit, thus denergizing pen-lifter Y magnet l10n, With the result that the receiving pen 33 is then moved into contact with itsA record strip. It Will be understood, of course, that at other times, `during a transmitting 'operation,'the contact 126 or 126el is not so vibrated; that pen-lifter magnet 110 is, therefore, energized, and that receiving pen 33a is moved away from its record strip. `It Will also be understood that these movementsof the receiving pen 33 to and from its record strip will takeplace as the transmitter tracer 23 is so moved/by the operator. This is brought about by/tlie provision at the transmitter station. of a ,short circuiting buzzer 129 (Fig. 1i) included in a branch circuit leading from wire 12 of the current-supplying circuit heretofore referred to; this branch coinprising Wire 130, whence it takes two pathfs, one consisting of wires 131, 132, 133, primary winding 134 of the induction coil heretofore referred to, wires 135, 136, resistance 137, and wire 138 to the negative pole of generator 3.; and the other consisting of Wire 139, magnet 129, Wires 140, 141, 142, 136, resistance 137, and wire 138 to the negative pole of generator 3. This two-path branch circuit is normally, and while the trans-` mitter tracer 23 is raised from platen convtact 125, shunted out ofthe current-supplying circuit fromgenerator 3 by a short circuit consisting of Wire 143 from Wire 12, platen contact 125, contact 144, and wires 145, 142, 136, 138 to negative pole of generator 3. Through these connections, as platen switch 125 is depressed in writing, vibrations are produced in the right and apparatus.

left tracer lines to the distant and local receivers, these producing, through pen'lifter relay 114. (the winding 149"of "wh-ioh is bridged across the right and left lines'lby Wire 150s including a condenser)`,vibration of diaphragm 151 andof the'loose ' contacts 126, 127, in tube 128, so as tobreak the circuit, heretofore described, through pen-v lifter magnet 110, which is thus denergized, permitting receiver pen 33l to move .into contact With itsrecord strip. All this `interfere With'the accuratev operation of the pen-lifter relay 114, which is kept thereby in a constant state of vibration'. These are due to many causes, including imperfect setting of contact brushes; rough commutator; dirt on the commutator; sparking at the brushes; etc. To some extent this wave diiiiv culty may be avoided by adjustingthe relay 114 so as to render it non-sensitive to such Waves, but this is an unsatisfactory solution of the difficulty because of resulting decreased efiiciency in operation. This objection may also be avoided to some extent by loading the' generator withV a considerable non-inductive load sufficient to absorb the Waves, but this is also objectionable because of waste of current, where, as in telautographs, the sole function of the generator is to supply current for the operation of the I have discovered that the difficulty may be entirely avoided without resort to these unsatisfactory expedients by connecting across the dynamo terminals a condenser 260 of proper capacity toA absorb such waves, as shown in Figs. 1 and 2. The necessary or desired capaci'tv of the condenser for this purpose may be ascertained in several ways, as,.for example, by. connecting a telephone receiver in series with a small condenser, across the' generator terminals and gra-dually adding condenser-s to the Surge bank until the noise in the receiver disappears Vor is sufficiently reduced. For generators of onedialifLklriorseI power or less, a condenser capacity of 18 to 30 microfarads is usually sutiicient.

What I claim is: i

1. In a telautographic system the combination with the main line wires connecting a transmitter and receiver, of a suitable magnetic field, means including pen .members movable in said field by the currents on the main lines, for moving the receiving pen` nation with the main line wires connecting a transmitterand receiver, of a suitable inagnetic eld, means including pen members movable in said held by the currents on the main lines, for moving tlieroeiving pen laterally, a short circuit-ing buzzer connected with the pen moving means for vibrating the seme, and a local circuit in the receiver including said magnet lieldand buzzer, substantially as described.

3. In a telautographic system the combil u nation Withl the main line wires connecting a transmitter and receiver, of a suitableA magnetic field, a local cxreint for exciting said tlc-ld, means, includinggmembers movable in said field by the currents on the main lines, for moving the receiving pen laterally, a short circuit buzzer connected with the penmoving mea-ns for vibrating the same, and a branch circuit for said hi r for said 4, ln telautographic system, the combi-v nation with the main line Wires connecting e. transmitter and receiver, of a direct current generator for supplying current thereto, :i shunt circuit connected to the generator terminals, and a condenser in seid shunt cir cuit and proportioned so as to shunt circuit the injurious alternating currents produced by the generator armature.

In a telautographic system, the combination with the main line wires connecting a transmitter and receiver,lof a direct current generator for supplying current thereto, aV shunt circuit connected to the generator terminals, and a condenser in said shunt circuit and proportioned so as to shunt circuit the injurious alternating currents produced by the generator armature.

In testimony whereof, I have hereunto set my hand, in the presence of two subscribing Witnesses. A Y

HENRY W, QNEILL. Witnesses:

J. A. GRAVES, E. BROWN.

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