Expandable keyboard for electronic pocket calculators and the like
First Claim
1. A keyboard arrangement including a first array of keys operative selectively on a first electronic circuit, said keyboard arrangement being physically detachable into a plurality of portions each bearing a section of said array of keys, each of said portions being adapted to electrically interconnect with adjacent keyboard portions for selective operation on said first electronic circuit.
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Accused Products
Abstract
An expandable keyboard for a pocket-type calculator is made in modular form to electrically interconnect to form a keyboard much larger than that of a familiar pocket calculator. The keyboard portions are hinged together normally forming a stack, which occupies along with the display and the electronics, a space about as large as a conventional pocket calculator.
191 Citations
9 Claims
- 1. A keyboard arrangement including a first array of keys operative selectively on a first electronic circuit, said keyboard arrangement being physically detachable into a plurality of portions each bearing a section of said array of keys, each of said portions being adapted to electrically interconnect with adjacent keyboard portions for selective operation on said first electronic circuit.
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8. A pocket electronic device housing a display and an electronic circuit, a first keyboard integral with said device and selectively operative on said circuit for activating said display, said device being adapted for electrical interconnection with a second keyboard physically moveable with respect thereto, said circuit being adapted to respond to the selective depression of the keys of said second keyboard for operating said display.
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9. A pocket electronic device housing a display and an electronic circuit, said device including a keyboard having a first set of keys selectively operative on said circuit for controllably activating said display in a first manner, said keyboard being adapted to expand to include a second set of keys physically moveable with respect thereto in addition to said first set, said circuit being adapted to respond to the keys of said second set for controllably activating said display in a second manner.
Specification