GAS PHOTOTUBE CIRCUIT
Abstract
This patent pertains to electronic circuits for measuring the intensity of light and is especially concerned with measurement between preset light thresholds. Such a circuit has application in connection with devices for reading-out information stored on punch cards or tapes where the cards and tapes are translucent. By the novel arrangement of this invention thc sensitivity of a gas phototube is maintained at a low value when the light intensity is below a first threshold level. If the light level rises above the first threshold level, the tube is rendered highly sensitive and an output signal will vary in proportion to the light intensity change. When the light level decreases below a second threshold level, the gas phototube is automatically rendered highly insensitive. Each of these threshold points is adjustable.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 4343354
- Patent Number(s):
- 2825818
- Assignee:
- U.S. Atomic Energy Commission
- Patent Classifications (CPCs):
-
G - PHYSICS G06 - COMPUTING G06K - RECOGNITION OF DATA
- NSA Number:
- NSA-12-010277
- Resource Type:
- Patent
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-58
- Country of Publication:
- United States
- Language:
- English
- Subject:
- PATENTS; GASES; LIGHT; MEASURED VALUES; PATENT; PHOTOMULTIPLIERS; PLANNING; PULSES; RECORDING SYSTEMS; SENSITIVITY; STORAGE
Citation Formats
Richardson, J H. GAS PHOTOTUBE CIRCUIT. United States: N. p., 1958.
Web.
Richardson, J H. GAS PHOTOTUBE CIRCUIT. United States.
Richardson, J H. Sat .
"GAS PHOTOTUBE CIRCUIT". United States.
@article{osti_4343354,
title = {GAS PHOTOTUBE CIRCUIT},
author = {Richardson, J H},
abstractNote = {This patent pertains to electronic circuits for measuring the intensity of light and is especially concerned with measurement between preset light thresholds. Such a circuit has application in connection with devices for reading-out information stored on punch cards or tapes where the cards and tapes are translucent. By the novel arrangement of this invention thc sensitivity of a gas phototube is maintained at a low value when the light intensity is below a first threshold level. If the light level rises above the first threshold level, the tube is rendered highly sensitive and an output signal will vary in proportion to the light intensity change. When the light level decreases below a second threshold level, the gas phototube is automatically rendered highly insensitive. Each of these threshold points is adjustable.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1958},
month = {3}
}