US160580A - Improvement in solutions for chemical telegraph-paper - Google Patents

Improvement in solutions for chemical telegraph-paper Download PDF

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Publication number
US160580A
US160580A US160580DA US160580A US 160580 A US160580 A US 160580A US 160580D A US160580D A US 160580DA US 160580 A US160580 A US 160580A
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paper
improvement
solutions
chemical
telegraph
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/20Duplicating or marking methods; Sheet materials for use therein using electric current

Definitions

  • a small amount of bichloride of mercury increases the sensitiveness of the paper. This, however, may be omitted, and, in place of hi trate of ammonia, any other salt may be employed having a corresponding reaction with the aurichloride of sodium.

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Description

UNITED STATES PATENT QFFICE.
THOMAS A. EDISON, OF NEWARK, NEW JERSEY, ASSIGNOR TO HIMSELF AND GEORGE HARRINGTON, OF WASHINGTON, D. U.
IMPROVEMENT IN SOLUTIONS FOR CHEMICAL TELEGRAPH-PAPER.
Specification forming part of Letters Patent No. 160,580., dated March 9, 1875; application filed June 1, 1874.
To all whom it may concern:-
Be it known that I, THOMAS A. EDIsoN, of Newark, in the county of Essex and State of New Jersey, have invented an Improvement in Solutions for Chemical Telegraphic Paper, of which the following is a correct description:
I make use of about five pennyweights of aurichloridc of sodium (double chloride of gold and sodium) to a pint of water, and about an ounce of nitrate of ammonia.
A small amount of bichloride of mercury increases the sensitiveness of the paper. This, however, may be omitted, and, in place of hi trate of ammonia, any other salt may be employed having a corresponding reaction with the aurichloride of sodium.
THOMAS A. EDISON. \Vituesses:
GEO. T. PINOKNEY, CHAS. H. SMlTH.
US160580D Improvement in solutions for chemical telegraph-paper Expired - Lifetime US160580A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2631918A (en) * 1951-06-14 1953-03-17 Gen Electric Color forming chemical reaction recorder
US3418217A (en) * 1959-07-23 1968-12-24 Minnesota Mining & Mfg Electrolytic image formation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2631918A (en) * 1951-06-14 1953-03-17 Gen Electric Color forming chemical reaction recorder
US3418217A (en) * 1959-07-23 1968-12-24 Minnesota Mining & Mfg Electrolytic image formation

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