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Braille Readout Pocket Calculator

IP.com Disclosure Number: IPCOM000082723D
Original Publication Date: 1975-Jan-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Bartels, RA: AUTHOR

Abstract

A braille readout pocket calculator 10 is shown in Fig. 1 which includes a braille readout display 14 and a conventional keyboard 12. The readout display 14 is constructed of a plurality of aligned pins, i.e., 20 in Fig. 2, wherein each decimal digit may be composed of four vertical pins, arranged to provide a braille readout indication of the value of a particular digit. A readout button 16 is provided for the purpose of locking the pins in place, after they are selected by the appropriate calculating circuitry within the logic of the calculator. A fifth pin could be added for decimal point location.

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Braille Readout Pocket Calculator

A braille readout pocket calculator 10 is shown in Fig. 1 which includes a braille readout display 14 and a conventional keyboard 12. The readout display 14 is constructed of a plurality of aligned pins, i.e., 20 in Fig. 2, wherein each decimal digit may be composed of four vertical pins, arranged to provide a braille readout indication of the value of a particular digit. A readout button 16 is provided for the purpose of locking the pins in place, after they are selected by the appropriate calculating circuitry within the logic of the calculator. A fifth pin could be added for decimal point location.

Figs. 2 and 3 show details of the possible configuration of the selector pins. In Fig. 2, the face plate 18 having holes therein through which the pins 20 may protrude is located at the surface 14 of the calculator. The pins 20 selectively protrude through the face plate 18 and are locked in place by a movable plate 22, reacting with the collar 24 after the solenoid selector coil 26 has caused the pin to move upwards. The movable plate 22 is actuated in the direction 28 by pushing the readout button 16.

Fig. 3 shows the pin 20 in the raised or selected position. The purpose of the locking plate 22 is to reduce the drain on the battery during the readout operation, which would otherwise be necessary to hold the pins 20 in place.

An additional configuration is shown in Fig. 4, wherein an actuating member 30 is shown connected between...