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Browse Prior Art Database

Digital Display Indicator

IP.com Disclosure Number: IPCOM000092591D
Original Publication Date: 1966-Dec-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Wolfersteig, JR: AUTHOR

Abstract

In a digital display indicator, a counter automatically increments to a designated position in response to a discrete selection signal. Side 1 of a rotating drum, the periphery of which is used as the display indicator, is a conductive plate except for wedge-shaped, insulated or etched section 2. The latter insulates one brush from the conductive surface at any position. Ten decimal inputs labeled 0...9 are applied through associated brushes 3. Those normally in contact with the conductive surface of the drum. Common brush 4 is connected between the outer edge of the conductive surface of the drum and multivibrator 5, the circuit of which is completed through line 6 to ground.

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Digital Display Indicator

In a digital display indicator, a counter automatically increments to a designated position in response to a discrete selection signal. Side 1 of a rotating drum, the periphery of which is used as the display indicator, is a conductive plate except for wedge-shaped, insulated or etched section 2. The latter insulates one brush from the conductive surface at any position. Ten decimal inputs labeled 0...9 are applied through associated brushes 3. Those normally in contact with the conductive surface of the drum. Common brush 4 is connected between the outer edge of the conductive surface of the drum and multivibrator 5, the circuit of which is completed through line 6 to ground.

Multivibrator output 7 is connected to electromagnet 8 which controls a pawl- ratchet mechanism. Ratchet 9, having ten inclined teeth corresponding to the digits 0...9, is mounted on the opposite side 10 of the drum and, together with pawl 11, operates to step the counter one increment for each output pulse from multivibrator 5. Pawl 11 is connected to lever 12 which pivots about point 13 to respond to motion from lever 15, movement of which is controlled by electromagnet 8 about pivot point 14. Inputs 0 9 are selected and energized through a device such as a decoder. When selected, the inputs apply a level from their respective brushes 3 through the conductive plate to brush 4, thus actuating multivibrator 5.

For each pulse from multivibrator 5, the operation of t...