Got this to learn more about FAX in the time frame of W.W. II. In particular to see if there's any commonality with the AQA-5 Sonobuoy DIFAR plotter.
The Navy model FOA (Maritime.org)Facsimile Transmitter-Receiver worked with either photographic paper or film. 100 Revoltuions Per Minute (RPM). Used 21 vacuum tubes.
Pen and Ink was used in the Morse Telegraph patents.
There were many patents for wet paper processes where writing would appear when a stylus was electrically energized, but this has many obvious problems.
A spark can be used to burn a hole in plain paper, but if the next place you want a small hole is near an existing hole then the spark tends to jump to the old hole and so this system is not capable of fine resolution. Don't know if it was a fire hazard, but expect that was the case.
Thermal paper (Wiki) was used in the 1970s for cash register receipts, the TI Silent 700 printer (Wiki), and many other applications. A problem is that the image erases itself over time and it requires a special paper. You can still buy a roll of thermal paper 8-1/2" wide since that was a standard for many applications.
Western Union Teledeltos paper turns black when electrical current is applied. It is made up of a special base paper and a special top coating. Depending on the application this paper or thermal paper may be chosen. As of 2021 I think Teledeltos paper is extinct.
The Xerographic process was invented in 1940 but it took some time to come up with a low cost printing engine that uses fine black particles (Wiki: Toner) to become today's standard for most kinds of printing on plain (or fancy) paper.
Fig 1 Right Front view
The hole to the left of the push button is for a pilot light.
Fig 2 Top Front view
Fig 3 Left Rear view
Wire connects to a dedicated fax line.
The plug is for an AC power cord.
Fig 4 Front top view
Fig 5 Left Top view
Fig 6 Top View
Fig 7 Left-Front view
Fig 8 Left Side
Fig 9 Bottom view.
1897796 Electrical Transmission of Pictures, Otho Fulton, App: 1923-08-03, Pub: 1927-10-13
For half-tone (Wiki) images, this circuit provides amplification of the current pulses with wide bandwidth thus making for much better image quality.
2153858 Telegraphic transmission of intelligence, Raleigh J Wise, Western Union, App: 1935-05-28, Pub: 1939-04-11, -
Requires conductive original.
2173741 Electrostatic recording mechanism, Raleigh J Wise, Frederic L O'brien, Western Union,App: 1935-06-14, Pub: 1939-09-19, -
This was ahead of its time. Both toner (Wiki) and powder coating (Wiki) work electrostatically, but require heat to fix the powder.
This system could get something like lamp black from a pen onto plain paper but then what, I see no provision to fix it.
2176442 Signal producing means, Raleigh J Wise, Western Union, 1939-10-17, -
This patent is mentioned in 2255868. But the DeskFax does not use a dual photocell chopper.
It's not needed since a simple inversion can change a negative image to a positive image, so this complication was not economical.
2229091 Telegraphic transmission of intelligence, Bernard L Kline, Western Union, App:1935-07-09, Pub: 1941-01-21, -
2251742 Means for recording signals electrically, Bernard L Kline, Western Union,App: 1935-08-31, Pub: 1941-08-05, -
"Known telegraphic receiving papers of one kind are dependent upon the effect of light to produce a chemical change in a recording medium and must therefore be used and stored under Special conditions.
Other receiving papers of the prior art which rely on the chemical change in a recording medium to produce a visible record upon passage of an electric current must be used in a moist condition.
Still other recording papers of the prior art depend upon the effect of externally applied heat to produce a chemical change in a recording medium and these papers have the Serious disadvantage of requiring relatively complicated receiving apparatus to apply the heat in amounts varying in accordance with the received signals.
Recording blanks produced in accordance with the present invention are free of the above enumerated disadvantages."
2255868 System and apparatus for facsimile telegraphy, Raleigh J Wise, Garvice H Ridings, Frederic L O'brien, Humy Fernand E D, Western Union, 1941-09-16, - This has most of the look and feel of the WU DeskFax, but also includes provision for holding a number of drums pre-wrapped with FAX paper so that the machine can receive a number of Faxes without someone changing the paper.
2255869 System and apparatus for facsimile telegraphy, Garvice H Ridings, Raleigh J Wise, Western Union, 1941-09-16
2266802 Synchronizing system, Hugh C Ressler, Radio Inventions, 1941-12-23, - for syncing fax drums. here as place holder for the sync method.
2294146 Electrosensitive recording blank, Raleigh J Wise, Western Union, App: 1939-01-27, Pub: 1942-08-25, -
based on conducting fiber base that may be black and a thin white coating. When electrical current is applied black writing on a black background appears.
There are over a dozen patents where the title includes "Electrosensitive recording blank":
2315361 System and apparatus for facsimile telegraphy, Raleigh J Wise, Louis G Stewart, Robert D Parrott, Western Union, App: 1939-09-02, W.W.II, Pub: 1943-03-30, -
This is the Western Union DeskFax machine. There are some subtle differences, but overall the same as this machine.
2425742 Electrosensitive recording blank, Bernard L Kline, Western Union, App: 1942-07-29, Pub: 1947-08-19, -
"In accordance with the instant invention, I have discovered that a large class of substantially water-insoluble organic sulphur bearing compounds of metals is especially suitable for use as the marking coating or film. These compounds, for example, comprise thio-oxalates, thiolates or mercaptides, thiolacetates or thio-glycolates, and thiocarbamides, of metals such as, for example, copper, silver, mercury and lead, and are in general characterized by originally being white or light in color, thus providing a desirable light colored background for the recording blank, and when marking potentials or currents are applied to or passed through a coating of such compounds in selected elemental areas of the recording blank, the compounds in just those areas are reduced or converted to sulphides of the metals. These sulphides, being black or dark in color, serve to delineate the recorded subject matter, whether it be pictures, writing, drawings, or other subject matter, in sharp distinct contrast with the light Colored background of the blank."
This is probably the method used in the AQA-5 Sonobuoy plotter used to visualize the signals from the SSQ-53A DIFAR Sonobuoy.
Patent Citations (9) Cited By (9)
2681309 Electrosensitive recording blank, Bernard L Kline, Western Union, 1954-06-15, -
"During recording operations there is a tend ency for decomposition products to accumulate on the point of the electrical recording stylius, which accumulation is highly objectionable. It is an object of the present invention to provide an improved cuprous-thiocyanate recording blank in which the marking coating embodies means for substantially preventing the accumulation of decomposition products on the recording stylus."
Patent Citations (9)
Cited By (2)
2686858 Electrochemical paper and method of preparing same, Earl J Kohn, David L Venezky, 1954-08-17, -
2689273 Two-way facsimile telegraph system, Garvice H Ridings, Raleigh J Wise, George B Worthen, Western Union,App: 1948-06-16, Pub: 1954-09-14, - uses a stylus for both sending and receiving.
2779820 Facsimile synchronizing apparatus, Foster E Weld, Gamewell, 1957-01-29, -
Synchronization was a key problem in Stock market Tickers.
Gamewell made fire call boxes and other stuff.
2874218 Phasing system, II Samuel Gordon Allen, Frank L Currie, John J Mcmanus, Western Union,1959-02-17, -
for synchronizing drum rotation
From the article introducing the DeskFax here are some other uses of the electrostatic printing technology (Teledeltos paper).
132 patents mention Teledelots.
Weather FaxSignal Corps TT-1B/TXC-1 Weather fax
Fathometer or Marine Depth Recorder
Submarine Signal Co. Fathometer
1667540 Method and apparatus for measuring distance, Dorsey Herbert Grove, Submarine Signal Co, 1928-04-24, -
1883433 System and apparatus for submarine signaling, Williams Robert Longfellow, Submarine Signal Co, 1932-10-18, -
2108089 Recording device, Jr Edwin E Turner, Submarine Signal Co, 1938-02-15, -
"The paper is preferably a wax paper, having a base coloring different from the coloring of the wax. So that when the wax is removed by the marking of the stylus on it the color beneath will show.
A prior art problem with sparks burning holes in paper is that the spark tries to go to the hole and so will not show small movements of the stylus.
This is the system used by Rustrak.
3048848 Method and apparatus for chart recording, Richard W May, Rust Ind Co, 1962-08-07, - I have one of these somewhere here. It uses a simple wire bail to keep the stylus above the paper and every now and then a bar snaps down to cause the stylus to mark the wax paper.
2401019 Time interval meter, Rieber Frank, Time Interval Instruments, 1946-05-28 - uses Teledeltos paper for permanent record
3267413 Echo signal detection and display apparatus, John N Beebe, Jacques P Perron, Raytheon, 1966-08-16, - uses AC transformer coupling between the electronics and the rotating lamp. Plots on electrostatic paper.
Stock Tickers - they use the work Unison for Synchronization
Western Union Self Winding Clocks (page 1, page2) -
Western Union 5A Stock Ticker -
Ref 2. YouTube: PeriscopeFilm: U.S. Navy Sonobuoy Indicator Group AN/AQA-1 Anti-submarine Warfare Film 51114, 17:50 -
Facsimile in Telegraphy P.J. Howe
6 Teledeltos paper,
Signal Corps TT-1B/TXC-1 Weather fax
Submarine Signal Co. Fathometer
Bell Labs sound spectrograph (note 11) pg 14
11. The Sound Spectrograph, W. Koening, H.K. Dunn, L.Y. Lacy, Journal of the Acoustical Society of America, Vol 17, July 1946 - See the SSQ-53A Audio Analysis section
DeskFax - Telefax,
pg 23: The DeskFax in the article does not have the chopper wheel, i.e. it uses a simpler optical reader.
Thyratrons in Cable Operation
Western Union commented on the start of Xerography and the new "transistor" but WU had not been involved in the invention of Xerography.
2221776 Electron photography, Chester F Carlson, 1940-11-19, -
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