Patent US2785461A successfully refreshed from Google Patents.
Patent DE2938136A1 successfully refreshed from Google Patents.
DE2938136A1
Expired / Lapsed
DE
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Pocket calculator for digital tape measurements - has pulse generator driven by tape to provide input to circuitry for total measure
Assignee: WOLF E MUELLER FA
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Filing: 1979-09-20
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Granted: —
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Expires: 1999-09-20
Abstract
Abstract The pocket calculator has a keyboard (2) and a digital display (3) mounted on a front facia with the necessary electronic circuitry mounted on a card (4) in the base of the unit. The tape (7) is wound onto a spool (5) and passes through a slot in the side wall. A control roller e.g. friction wheel, carries a rotary pulse generator that emits pulses when the tape is drawn out of the unit. The electronic circuitry totalises the pulses generated to provide a display of the tape length. A battery (9) provides power for the electronic circuits.
Inventors
- 👤 Bernd M. 1000 Berlin Buchholz
- 👤 Wolf-E. Müller
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-09 20:10
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/02; G01B7/026; G01B3/00; G01B3/10; G01B3/1084; G01B3/1094; G01B3/11; G06; G06F; G06F15/00; G06F15/02; G06F15/025; G06F15/0275
Claims Analysis
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