Site.1908Calcumeter History
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16 June 2014
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(:title 1908-15: The Standard Desk Calcumeter, serial 89939:)
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(:title ~1912: The Standard Desk Calcumeter, serial 89939:)
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This calcumeter is marked 89939 79, the former being the serial number and the purpose of the second two digits yet to be established.[^Robert Otnes, '/The Calcumeter/', IEEE Annals of the History of Computing, Vol. 20, No. 1, 1988, p. 68^]
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This calcumeter is marked 89939 79, the former being the serial number and the purpose of the second two digits yet to be established.[^Robert Otnes, '/The Calcumeter/', IEEE Annals of the History of Computing, Vol. 20, No. 1, 1988, p. 68^] This Calcumeter is later than 1907 or later as it includes the upgraded RESET dial on the right of its input dials which was patented in November of 1907. A chronology of the Calcumeters compiled by Robert Otnes suggests that by 1 Jan 1909 there were "50,000 in use" and in a further year's time "60,000 in use".[^ibid.^] Assuming the serial numbers are sequential this suggests a dating of 1912 for this Calcumeter.
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All dials are reset to zero by spinning the RESET dial fully clockwise, and then fully counterclockwise. The Calcumeter was available in various models with 6 to 12 input dials. Two swivel legs hold the calcumeter at about a 30 degree angle, or can be folded for flat use on the desk.
16 June 2014
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This calcumeter is marked 89939 79, the former being the serial number and the purpose of the second two digits yet to be established.
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This calcumeter is marked 89939 79, the former being the serial number and the purpose of the second two digits yet to be established.[^Robert Otnes, '/The Calcumeter/', IEEE Annals of the History of Computing, Vol. 20, No. 1, 1988, p. 68^]
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%center% http://meta-studies.net/pmwiki/uploads/CalcumeterPatent.jpg
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%center% http://meta-studies.net/pmwiki/uploads/CalcumeterPatent.jpg
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16 June 2014
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(:title 1908-15: The Standard Desk Calcumeter:)
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(:title 1908-15: The Standard Desk Calcumeter, serial 89939:)
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This calcumeter is marked 89939 79, the former being the serial number and the purpose of the second two digits yet to be established.
Changed line 9 from:
This Calcumeter is dated after 1907 as it includes the upgraded RESET dial on the right of its input dials. All dials are reset to zero by spinning the RESET dial fully clockwise, and then fully counterclockwise. The Calcumeter was available in various models with 6 to 12 input dials. Two swivel legs hold the calcumeter at about a 30 degree angle, or can be folded for flat use on the desk.
to:
This Calcumeter is later than 1907 or later as it includes the upgraded RESET dial on the right of its input dials which was patented in November of 1907. All dials are reset to zero by spinning the RESET dial fully clockwise, and then fully counterclockwise. The Calcumeter was available in various models with 6 to 12 input dials. Two swivel legs hold the calcumeter at about a 30 degree angle, or can be folded for flat use on the desk.
13 June 2014
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The 1901 Calcumeter Patent by James Walsh is shown below:
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The mechanism diagrams from the 1901 Calcumeter Patent by James Walsh are shown below:
13 June 2014
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The Calcumeter Patent by James Walsh is shown below:
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The 1901 Calcumeter Patent by James Walsh is shown below:
13 June 2014
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The Calcumeter Patent by James Walsh is shown below:
%center% http://meta-studies.net/pmwiki/uploads/CalcumeterPatent.jpg
%center% http://meta-studies.net/pmwiki/uploads/CalcumeterPatent.jpg
13 June 2014
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13 June 2014
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Length - 8 3/4" Width - 2" Height - 3/4"
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Length - 8 3/4" Width - 2" Height - 3/4"
%center% %width=800px% http://meta-studies.net/pmwiki/uploads/CalcumeterPatent.jpg
%center% %width=800px% http://meta-studies.net/pmwiki/uploads/CalcumeterPatent.jpg
13 June 2014
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%center% %width=800px% http://meta-studies.net/pmwiki/uploads/Calcumeter.jpg
13 June 2014
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13 June 2014
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The machine is made of steel, nickel, brass and German Silver (an alloy of nickel, copper and zinc), which is reflected in the color variations of the wheels.
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The machine is made of steel, nickel, brass and German Silver (an alloy of nickel, copper and zinc), which is reflected in the color variations amongst the various components.
13 June 2014
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The machine is made of brass and German Silver (an alloy of nickel, copper and zinc), which is reflected in the color variations of the wheels.
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The machine is made of steel, nickel, brass and German Silver (an alloy of nickel, copper and zinc), which is reflected in the color variations of the wheels.
13 June 2014
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This is dated after 1907 as it includes the upgraded RESET dial on the right of its input dials. All dials are reset to zero by spinning the RESET dial fully clockwise, and then fully counterclockwise. The Calcumeter was available in various models with 6 to 12 input dials. Two swivel legs hold
The machine is made of steel, nickel, brass and copper,
to:
The Calcumeter was invented by James J. Walsh of Elizabeth, N.J. He received a patent for it December 17, 1901 (U.S. Patent 689,225). First manufactured by Morse & Walsh Company over 1903-4, by 1906 it was being produced by Herbert North Morse of Trenton and was sold until 1915 and had disappeared by 1920 after being outclassed by machines such as the Lightening Adder. An early rotating gear adder, as with many that would follow it, the Calcumeter utilised a stylus for input.
This Calcumeter is dated after 1907 as it includes the upgraded RESET dial on the right of its input dials. All dials are reset to zero by spinning the RESET dial fully clockwise, and then fully counterclockwise. The Calcumeter was available in various models with 6 to 12 input dials. Two swivel legs hold the calcumeter at about a 30 degree angle, or can be folded for flat use on the desk.
Whilst some list the Calcumeter as following in the footsteps of the Pascaline it uses a quite different method for storing potential energy in order to affect a carry across its dials. Whilst the Pascaline used a sortoir weight which was progressively lifted until a carry occurred, the Calcumeter achieved this by storing the energy of the turned dials in springs, which were released as the dial moved from 9 to 0 triggering an addition of 1 to the next dial to the left.
The machine is made of brass and German Silver (an alloy of nickel, copper and zinc), which is reflected in the color variations of the wheels.
This Calcumeter is dated after 1907 as it includes the upgraded RESET dial on the right of its input dials. All dials are reset to zero by spinning the RESET dial fully clockwise, and then fully counterclockwise. The Calcumeter was available in various models with 6 to 12 input dials. Two swivel legs hold the calcumeter at about a 30 degree angle, or can be folded for flat use on the desk.
Whilst some list the Calcumeter as following in the footsteps of the Pascaline it uses a quite different method for storing potential energy in order to affect a carry across its dials. Whilst the Pascaline used a sortoir weight which was progressively lifted until a carry occurred, the Calcumeter achieved this by storing the energy of the turned dials in springs, which were released as the dial moved from 9 to 0 triggering an addition of 1 to the next dial to the left.
The machine is made of brass and German Silver (an alloy of nickel, copper and zinc), which is reflected in the color variations of the wheels.
13 June 2014
by -
Added lines 1-8:
(:title 1908-15: The Standard Desk Calcumeter:)
Patented in December of 1901, and built through about 1915, this early rotating gear adder as with the Pascaline utilised a stylus for input.
This is dated after 1907 as it includes the upgraded RESET dial on the right of its input dials. All dials are reset to zero by spinning the RESET dial fully clockwise, and then fully counterclockwise. The Calcumeter was available in various models with 6 to 12 input dials. Two swivel legs hold the calcumeter at about a 30 degree angle, or can be folded for flat use on the desk.
The machine is made of steel, nickel, brass and copper, which is reflected in the color variations of the wheels.
Length - 8 3/4" Width - 2" Height - 3/4"
Patented in December of 1901, and built through about 1915, this early rotating gear adder as with the Pascaline utilised a stylus for input.
This is dated after 1907 as it includes the upgraded RESET dial on the right of its input dials. All dials are reset to zero by spinning the RESET dial fully clockwise, and then fully counterclockwise. The Calcumeter was available in various models with 6 to 12 input dials. Two swivel legs hold the calcumeter at about a 30 degree angle, or can be folded for flat use on the desk.
The machine is made of steel, nickel, brass and copper, which is reflected in the color variations of the wheels.
Length - 8 3/4" Width - 2" Height - 3/4"