Rockwell-ANITA Calculators
Rockwell-ANITA 1216

Rockwell-Anita 1216

Rockwell ANITA 1216.

Power supply - AC.

Display is 12 digits, Burroughs 'Panaplex' amber gas discharge.

4-function, %, memory.

Integrated circuits - Electronic Arrays EA7022 and EA7023, here date coded 1973.

256 mm x 193 mm x 70 mm (10.0" x 7.6" x 2.75").

"Made in U.S.A"
"Rockwell International. Sumlock Anita Ltd. Uxbridge England"
Circuit board has the name of the Cherry company on it, see below.

Introduced in late 1973[1].

 

This Rockwell-Anita calculator is unusual for two reasons:

This can be explained by the following report in the journal 'Electronics' in August 1973[2]:
"Cherry is private-labelling calculators. . .
Cherry Electrical Products Corp., Waukegan, Ill., has eased its way into calculator manufacturing and is now producing private-label units for Unicom, SCM, Summit, and Olympia.  The company, a major switch maker, moved into keyboard manufacture before making the jump into calculator assembly, a $6 million business which is expected to raise sales by 40% next year to over $24 million."

Unicom was the trade name of the calculators manufactured by the semiconductor company American Micro-systems Inc.  Like Sumlock Anita, Unicom was bought by Rockwell in 1972.  Very similar-looking calculators under the Unicom, Olympia, SCM (Smith, Corona, Marchant), and Summit labels are known.

See also the Rockwell-ANITA 102 hand-held calculator and its similarity to the Unicom 102.

Cover removed

The cover has been removed to reveal the Burroughs 'Panaplex' gas-discharge display and, at the rear, the two integrated circuits made by Electronic Arrays.

EA chips

The rear of the circuit board with the Electronic Arrays integrated circuit: EA7022 on the right and EA7023 on the left.

EA chips

Close up of the Electronic Arrays integrated circuits.

The journal 'Electronic Design' reported in January 1973[3]:
"Calculator system on two ICs
    Two MOS circuits contain all the calculating logic, the clock, and a good portion of the interface circuitry of a 12-digit, four-function memory calculator.  Called the EA7022 (in a 28-lead DIP) and the EA7023 (in a 40-lead DIP), the two packages make up the EA S129 set.  They include an arithmetic/algebraic processor with 12-digit entry and display capacity, an accumulator memory, the keyboard scanning and display control logic, an internal clock generator, and power-on clearing circuitry."

Label

The label on the rear.

ANITA 1216 DISPLAY CALCULATOR[1]

The new Anita 1216 is a versatile, low-cost calculator from Sumlock.  The unit includes memory; automatic chaining; automatic decimal system; constant, percent and exchange keys.  The display is a big, easy-to-read 12-column Panaplex system.
    Individual problems can be worked and accumulated in the independent memory register, while the 12-column capacity coupled with advanced float in/fixed out decimal system and underflow ensure that Anita 1216 can tackle everyday calculations with ease.  Mixed calculations (e.g. 2 x 3 + 4) are carried out in a single continuous flow operation.
    The percent key permits entering percentage as a whole number while giving decimally correct answers.  The exchange key permits recall of last entry to display as well as avoiding the need for manual re-entry when exchanging divisors and dividends.

 

Reference:

  1. "eti EQUIPMENT NEWS", Electronics Today International, December 1973, p78.
  2. "News Briefs", Electronics, August 16, 1973, p44.
  3. "Calculator system on two ICs", Electronic Design, January 1973, p106.

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Text & photographs copyright © 2002 - 2022 Nigel Tout, except where noted otherwise.