[go: up one dir, main page]

US1712763A - Method and means for the repetition of telegraphic signals - Google Patents

Method and means for the repetition of telegraphic signals Download PDF

Info

Publication number
US1712763A
US1712763A US156174A US15617426A US1712763A US 1712763 A US1712763 A US 1712763A US 156174 A US156174 A US 156174A US 15617426 A US15617426 A US 15617426A US 1712763 A US1712763 A US 1712763A
Authority
US
United States
Prior art keywords
valve
trace
path
filament
grid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US156174A
Other languages
English (en)
Inventor
Hamel Charles Louis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US1712763A publication Critical patent/US1712763A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
    • H04L15/04—Apparatus or circuits at the transmitting end
    • H04L15/18—Automatic transmitters, e.g. controlled by perforated tape

Definitions

  • the present invention relates to the automatic repetition of telegraphic signals recorded as a continuous trace of 'sinuousform l5 and in a conducting or semi-conducting me dium upon a base of non-conducting material. It is an object of the invention to provide an improved method and means for the automatic repetition of such signals and a further object is to provide improved means for repeating the original signals recorded in the trace, in the form of current impulses adapted to operate a relay or similar reproducing or re-transmitting device.
  • a still further object is to provide an improved method of and novel means for controlling the output of a thermionic signal producing device by using a sinuous conducting signal trace comprising idle circuit closing portions and operative circuit closing portions to energize separate circuits alternately, so as to vary an impedance connected across the gridplate path of such thermionic signal pro ducing device relatively to a fixed resistance cbnnected across the filament-grid path thereof,
  • the electric conductivity of the sinuous sig nal trace need only be very small, of the or- 40 der, for example, of the conductivity of india ink.
  • the present method can, there fore, be carried out without employing special products.
  • These primary currents are then used to control the output of an amplifying device or system from which are thus obtained secondary currents of higher lntensity, the impulses of which reproduce exactly the recorded signals.
  • the signal impulses can then be automatically transmitted, retransmitted, deciphered or translated.
  • a preferred form of amplifying device for use 1n carrying the invention into practice is hereinafter'described in detail and is characterized essentially by a combination of two three-electrode vacuum tubes or valves which are connected to each other and to the contacts beneath which the band bearing the semi-conducting trace passes, in a novel and Improved manner and the output from WhlCll may excite a relay system repeating the signals inscribed on the band.
  • the workmg of this two valve amplifying ⁇ system is based fundamentally on the differences of potential produced successively between the grid and the filament of the first valve, ac-
  • the apparatus comprises two valves A, B each with three electrodes of which 1, 2, 3 and 4, 5, 6 are respectively the filament, the grid and the plate. 7 and 8 are the filament heating batteries.
  • the apparatus comprises also a transformer C the primary circuit 9 of which .is connected on the one hand to the plate 6 of the valve B, onthe other hand to the 'plate 3 of the valve A and to the positive pole of a battery 10, which constitute a plate battery for both of the valves A and B and the negative pole of which is connected to the filament 4 of the valve B.
  • the secondary circuit 11 of the transformer C is closed on the windings 12-12 of a polarized relay D, the armature 13.0f which,
  • a is the bandof paper or other suitable material driven with a uniform movement, in the direction indicated by the arrow, in any suitable way.
  • On this band have been traced by means of an ink (such as india ink or the like) or any other material which leaves a conducting trace, signals constituted by a sinuous line or mark 1) extending into two paths 6 and If one being the idle path and the other the operative path.
  • the band a is borne upon by a set of three contacts 19, 20, 21, the first of which coincides with the idle path, the second with the operative path and the third with both of these paths simultaneously.
  • the contact 19 is connected to the filament 1 of the valve A through the medium of a battery 22, which has its positive pole connected to the negative end of the said filament 1 and the function of which is to provide a negative grid bias for the grid 2 of the same valve, when required, as hereinafter explained.
  • the contact 20 is connected to the plate 3 of the valve A and the contact 21 is connected to the grid 2 of the same valve.
  • the contact 19 or idle contact is electrically connected to the contact 21 through the signal trace I), so that a conducting path then exists from the negative end of the filament 1, through the battery 22, contact 19, trace 6 and contact 21 to the grid 2.
  • Thetrace being of low conductivity, feeble currents only can flow therein but this is of no consequence, since the only function of the battery 22 is to influence the potential of the grid 2.
  • the grid 2 of the valve A will be connected to the negative pole of the aforesaid grid bias battery 22 and consequently become negative relatively to its filament 1.
  • the filament-plate path 13.of this valve is then non-conductive so that substantially no current from the battery 10 can then flow through this path, which, it will be observed, is connected in shunt across the grid-plate path of the valve B.
  • the grid 5 of the valve B being connected to the filament 4 thereof by a very high resistance 23, then acquires the potential of the negative end of the said filament 4, and a current, which however is comparatively feeble, can therefore'proceed from the battery 10 through the filamentplate path 4-6 and the plate circuit of this valve, the circuit including the primary winding 9 of the tran former C, as will readily is obvious, however that this plate current can have no effect through the transformer G upon the relay D.
  • the contact 20, or operative contact meets a trace portion in the operative path 6 and is thus electrically connected to the common contact 21 by the trace the grid 2 of the valve A becomes connected through the contact 21, trace 6 and contact 20 to the plate 3 of the said valve, which plate is itself connected to the posi tive pole of the plate battery 10, common to the valves A and B.
  • the grid 2 of the valve A therefore suddenly becomes highly positive and allows current from the battery 10 to flow'through the filament-plate path 13 of this valve through the high resistance 23.
  • this resistance 23 being very high relatively to that of the filamentlate path 13 of the valve A, the grid 5 o the valve B is, through the medium of this filament plate path, brought to a potential approximating to that of the positive pole of the plate battery 10 and therefore itbecomes highly positive with respect to the filament 4.
  • the current which flows in the plate circuit of this valve B and therefore in the primary winding 9 of the transformer C therefore suddenly increases.
  • This powerful current impulse is transmitted, inductively in the well known manner from the primary winding 9 to the secondary winding 11 of the transformer C, producing in the secondary circuit thereof a current impulse powerful enough to excite strongly the windings 12 of the polarized relay D.
  • a reverse impulse will be produced when the contacts 20, 21 at the operative track cease to be connected and the contacts'19, 21 at the idle path are l e-connected.
  • said method consisting in utilizing different parts of the said sinuous trace to complete alternately separate, electric circuits, whereof one circuit actuates potential controlled means to produce electric current impulses while the other circuit acts on the said potential controlled means to prevent it from producing electric current impulses.
  • a method for the repetition of telegraphic signals recorded as a continuous trace of sinuous form and of a conductive character upon a base of non-conducting material consisting in utilizing different parts of the said sinuous trace to complete alternately, separate electric circuits, whereof one circuit actuates potential controlled means to produce electric impulses to influence signal repeating means while the other circuit acts on said potential controlled means to prevent it from producing current impulses sumciently powerful to influence said repeating means.
  • apparatus for the repetition of telegraphic signals recorded as a continuous trace of sinuous form and of a conducting character upon a band of non-conducting material, apparatus comprising, in combination with the non-conducting ban'd bearing the trace, contacts between which and the band relative movement takes place to close alterately, alternative circuits corresponding to and controlled by different paths on the trace and means whereby the closure of a circuit through one path of the trace is caused to actuate means for producing signal impulses while the closure of a circuit through another part of the trace is caused to prevent the said means from functioning to produce signal impulses.
  • Apparatus according to claim 4 comprising two alternative circuits subject to closure through different parts of the signal trace and means for causing the one circuit
  • apparatus for the repetition of telegraphic signals, apparatus comprising, in combination,
  • a non-conducting base bearing a sinuous signal brace of conductive character, part of which signal trace lies in an idle path while another part thereof lies in an operative path, a contact for the idle path, a contact for the operative path and a contact common to both paths, a circuit including the first and last named, and a circuit including the second and last named of these contacts respectively, an electron discharge device common to both said circuits, a current soured for said electron discharge device, means for causing the first named circuit to increase the impedance of said electron discharge device, means for causing the last named circuit to diminish the impedance of said electron discharge device and means for producing current impulsesj said last named means being rendered effective or ineffective according as the impedance of the electron discharge device is diminished or increased.
  • the means for producing current impulses consists of a three-electrode valve, in combination with a source of current, and a high resistance shunting its filament-grid path, its
  • Apparatus for the repetition of telegraphic signals recorded as a continuous trace of sinuous form and of conductive nature upon a non-conducting base comprising in combination with said non-conducting base and conducting trace thereon, and contacts between which and the base relative movement takes place to close alternately, alternative circuits corresponding to and controlled by different paths on said trace, of a signal repeater, a valve for supplying signal impulses to said repeater, a high resistance shunted across the filament grid path of said valve and a variable impedance shunted across the grid-plate path of said valve, said variable impedance being caused to become high or low in proportion to the resistance shunting the said filament grid path, according to whether the sinuous trace, co-operating with the circuit controlling contacts, close one or the other of the two alternative circuits.
  • apparatus for the repetition of telegraphic signals recorded as a continuous trace of sinuous form and of a conducting character upon a band of non-conducting material, apparatus comprising in combination with the band respectively to the thirdly and secondly mentioned contacts, a second thermionic valve, a high resistance connecting the filament and rid of said second valve, and electric transormer, a relay, a local circuit controlled by said relay, a second electric battery having its negative pole connected to the filament of said second valve and its positive pole connected to the plate of the first mentioned valve and to one end of the primary winding of the transformer, the other end of said winding being connected to the plate of the secondly mentioned valve and the secondary winding of said transformer being in circuit with the relay and means for heating the filament of each valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Control Of Resistance Heating (AREA)
US156174A 1925-12-24 1926-12-21 Method and means for the repetition of telegraphic signals Expired - Lifetime US1712763A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR520307X 1952-06-16

Publications (1)

Publication Number Publication Date
US1712763A true US1712763A (en) 1929-05-14

Family

ID=8916698

Family Applications (1)

Application Number Title Priority Date Filing Date
US156174A Expired - Lifetime US1712763A (en) 1925-12-24 1926-12-21 Method and means for the repetition of telegraphic signals

Country Status (5)

Country Link
US (1) US1712763A (de)
BE (1) BE520307A (de)
DE (1) DE520307C (de)
FR (1) FR620664A (de)
GB (1) GB263800A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480386A (en) * 1947-04-09 1949-08-30 Rca Corp Transcriber for ink recorder tape

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480386A (en) * 1947-04-09 1949-08-30 Rca Corp Transcriber for ink recorder tape

Also Published As

Publication number Publication date
GB263800A (en) 1927-04-28
DE520307C (de) 1931-03-12
FR620664A (fr) 1927-04-27
BE520307A (fr) 1955-06-10

Similar Documents

Publication Publication Date Title
US1712763A (en) Method and means for the repetition of telegraphic signals
US3202967A (en) Remote control system
US1962467A (en) Method of and means for signaling
US2321618A (en) Space discharge oscillating relay
US2033948A (en) Carrier wave printing telegraph system
US2153858A (en) Telegraphic transmission of intelligence
US2186897A (en) Telautograph system
US2573392A (en) Carrier telegraph system
US2278692A (en) Facsimile signal inverter
US2131388A (en) Apparatus for communication systems
US2282377A (en) Control means for railway train communication apparatus
US1569003A (en) Signaling system
US1717062A (en) Electric signaling
US1883875A (en) Translating apparatus
GB284189A (en) Improvements in or relating to telegraph systems and circuit arrangements therefor
US1976733A (en) Signal receiving system
US820977A (en) Electric telegraphy.
US822579A (en) Electric system of transmission.
US1139226A (en) Radiotelegraphy.
US2290909A (en) Arrangement for transmitting current impulses
US2117358A (en) Communication system
US2246073A (en) Simplex and duplex telegraph system
US1103421A (en) Cable telegraphy.
US775416A (en) Electric system of transmission.
US1673697A (en) Relay and relaying system