US2038486A - Electrochemical recording of electric currents - Google Patents

Electrochemical recording of electric currents Download PDF

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Publication number
US2038486A
US2038486A US669278A US66927833A US2038486A US 2038486 A US2038486 A US 2038486A US 669278 A US669278 A US 669278A US 66927833 A US66927833 A US 66927833A US 2038486 A US2038486 A US 2038486A
Authority
US
United States
Prior art keywords
recording
reaction
electric currents
electrochemical
coloring
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
US669278A
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English (en)
Inventor
Glas Emil
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2038486A publication Critical patent/US2038486A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/20—Duplicating or marking methods; Sheet materials for use therein using electric current
    • B41M5/205—Duplicating or marking methods; Sheet materials for use therein using electric current and an eroding electrode
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/29—Printing involving a color-forming phenomenon

Definitions

  • the present invention relates to electrochemical recording of electric currents of any kind; and has among its objects the production of material upon which the record may be made and a proc- 5 ess of making a record of electric currents and of variations therein.
  • a further object of the invention is the production of impregnated or coated material upon which the recording is to be made, which contains a reagent or reagents which will combine with the metal ions leaving the recording electrode to form immediately and directly an insoluble coloring substance.
  • this primarily formed substance has an adsorption power as high as possible, for the colored substances are only held fast by the adsorbing effect of the carrier substance.
  • the whole accomplishment of this prior method recording therefore becomes very complicated.
  • the adsorbing effect is dependent only upon. the nature of the surface of the carrier substance. Therefore the color. will not be proportional to the intensity of the current, because the secondary coloring reaction needs a certain time for completion while'the adsorbing power of the carrier substance decreases.
  • the present invention by the use of proper imbibing substances and the electrochemical effect of the electrode recording the current, induces immediately (and without intermediate or catalytic reaction) a coloring reaction which gives a reaction product which is practically insoluble and at the same time colored.
  • This reaction takes place practically instantaneously; and results in practically absolute sharpness of recording.
  • Another important matter to be considered in choosing the reactions is that they also must b'e fit for recording high frequencies, like the highest musical audible frequencies. Therefore one had to take into consideration the most sensitive reaction groups, which at the same time satisfy the condition of an insoluble colored reaction product or precipitate.
  • Another advantage obtained by the present invention is that the coloring reaction is not merely superficially done and fixed like in the methods mentioned under 2, but that much more a penetrating effect of the coloring reaction together with an intensity of color (color tone) proportional to the current flow is obtained. Owing to the penetrating effect of the method of the present invention the resistance against mechanical stress by the electrode pin (pencil) is essentially increased. On account of the stability of the final products, it is also perfectly impossible for the color to turn pale or fade.
  • the quantitative yield per unit of time will be low and it is only possible to increase the conductivity of the soaking solution to a limited extent, the sensitiveness of a reaction, which, as above mene tioned, is of outstanding importance in the pres- .ent case, can be evaluated from two points of view.
  • the test limit is important, i. e. the smallest quantity of substance which can be found by the reaction, no matter in what volume. on the other hand, the limiting concentration is less important. Therefore one has to take into account especially such reactions, the test limit of which is as low as possible.
  • the sensitiveness is in many cases limited by the visibleness of the final products. If the molecules are enlarged by bringing in weight increasing groups of atoms and the coloring effect is intensified by the addition of cbloring groups, this limit is extended. As also insolubility and stability are required, the number of available reactions is considerably diminished. In the present invention all these necessities are satisfled by the use of reactions which lead to the formation of inner complex. comr ounds. Compounds which have a ring of five or six members are especially suitable, which compounds are characterized by high stability. In this group we find a series of reactions which fully satisfy all conditions.
  • the copper salt or the diamide oi thio-oxalic acid serves as illustrative. The copper is not only by principal valencies linked to the two sulphur atoms, but also by secondary valencies to the two Nil-groups.
  • Recording can be made on opaque material like paper or on transparent material like cellophane, gelatine, etc. when a record ribbon is mentioned herein is always meant a sheet of the substance to be impregnated in any form and not only in the form of a long narrow ribbon.
  • the record ribbon is suitably impregnated with a solution (for example alcoholic solution) of diamide of thio-oxalic acid.
  • a salt can be added, for instance sodium acetate, which at the same time advances the reaction by shifting the equilibrium in the solution in favor of the aciiorm of the diamid.
  • a copper or nickel pir. or a pin of silicon bronze (Cu-+0.05% Si) which by the action 01 the current goes into solution.
  • the record is of black color. The slight original hue of the diamide can easily be removed by subsequent washing in case it should be bothersome, without changing in the least the color of the lines. The high sensitiveness allows the highest speeds of recording.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Color Printing (AREA)
  • Materials For Photolithography (AREA)
US669278A 1932-05-04 1933-05-03 Electrochemical recording of electric currents Expired - Lifetime US2038486A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT418683X 1932-05-04

Publications (1)

Publication Number Publication Date
US2038486A true US2038486A (en) 1936-04-21

Family

ID=3673898

Family Applications (1)

Application Number Title Priority Date Filing Date
US669278A Expired - Lifetime US2038486A (en) 1932-05-04 1933-05-03 Electrochemical recording of electric currents

Country Status (4)

Country Link
US (1) US2038486A (en(2012))
BE (1) BE396040A (en(2012))
DE (1) DE649281C (en(2012))
GB (1) GB418683A (en(2012))

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421367A (en) * 1942-10-24 1947-05-27 Rca Corp Fibrous sheet material for the electrolytic formation of azo dyes thereon
US2425742A (en) * 1942-07-29 1947-08-19 Western Union Telegraph Co Electrosensitive recording blank
US2735617A (en) * 1950-07-18 1956-02-21 Process for recording on a recording
US2864720A (en) * 1954-10-29 1958-12-16 Ditto Inc Transfer sheet coated with a composition containing a salt and a hydrotrope
US2936707A (en) * 1951-06-22 1960-05-17 Ditto Inc Color reaction type duplication process
US2983654A (en) * 1956-10-24 1961-05-09 Timefax Corp Electrochemical recording
US3076406A (en) * 1954-09-28 1963-02-05 Dick Co Ab Duplicating method and element for use therein
US3165457A (en) * 1961-05-15 1965-01-12 Eastman Kodak Co Direct positive photoconductography
US3242858A (en) * 1960-07-28 1966-03-29 Eastman Kodak Co Photoconductography employing absorbed metal ions
US3262386A (en) * 1959-11-23 1966-07-26 Little Inc A Duplicating method
US3499887A (en) * 1966-05-13 1970-03-10 Dunlop Co Ltd Polymerization catalysts for episulphides

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2181533A (en) * 1936-01-18 1939-11-28 Western Union Telegraph Co Method of and means for recording signals electrically
DE1084485B (de) * 1956-04-03 1960-06-30 Milton Alden Elektrodenanordnung bei Vorrichtungen zur Erzeugung von Schreibspuren auf elektrisch empfindlichem Papier

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2425742A (en) * 1942-07-29 1947-08-19 Western Union Telegraph Co Electrosensitive recording blank
US2421367A (en) * 1942-10-24 1947-05-27 Rca Corp Fibrous sheet material for the electrolytic formation of azo dyes thereon
US2735617A (en) * 1950-07-18 1956-02-21 Process for recording on a recording
US2936707A (en) * 1951-06-22 1960-05-17 Ditto Inc Color reaction type duplication process
US3076406A (en) * 1954-09-28 1963-02-05 Dick Co Ab Duplicating method and element for use therein
US2864720A (en) * 1954-10-29 1958-12-16 Ditto Inc Transfer sheet coated with a composition containing a salt and a hydrotrope
US2983654A (en) * 1956-10-24 1961-05-09 Timefax Corp Electrochemical recording
US3262386A (en) * 1959-11-23 1966-07-26 Little Inc A Duplicating method
US3242858A (en) * 1960-07-28 1966-03-29 Eastman Kodak Co Photoconductography employing absorbed metal ions
US3165457A (en) * 1961-05-15 1965-01-12 Eastman Kodak Co Direct positive photoconductography
US3499887A (en) * 1966-05-13 1970-03-10 Dunlop Co Ltd Polymerization catalysts for episulphides

Also Published As

Publication number Publication date
BE396040A (en(2012))
GB418683A (en) 1934-10-30
DE649281C (de) 1937-08-19

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