US 4,029,915 · Granted 1977-06-14
Miniaturized calculator keyboard switch assembly having universally pivoted key actuators
A portable electronic calculator comprises a calculator body which supports a keyboard consisting of a single elongated row of keys each of which is adapted to be tilted in any one of four directions by the finger tip of a user to input a selected one of four different information signals from said key to a calculator circuit located within the body. The results of the calculation are supplied to an indicator circuit in the body for viewing by the user through an elongated indicator opening which is disposed in alignment with the row of keys.
Patent details
- Publication number
- US 4,029,915
- Filing date
- 1975-12-03
- Grant date
- 1977-06-14
- Assignee
- Hoshidenkoseizo Kabushiki Kaisha
- Inventor(s)
- OJIMA; SHIN
- CPC class
- G06F15/0225
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