GB883516A - Improvements in or relating to recording processes - Google Patents
Improvements in or relating to recording processesInfo
- Publication number
- GB883516A GB883516A GB39655/57A GB3965557A GB883516A GB 883516 A GB883516 A GB 883516A GB 39655/57 A GB39655/57 A GB 39655/57A GB 3965557 A GB3965557 A GB 3965557A GB 883516 A GB883516 A GB 883516A
- Authority
- GB
- United Kingdom
- Prior art keywords
- exposure
- film
- recording
- trace
- lamp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D15/00—Component parts of recorders for measuring arrangements not specially adapted for a specific variable
- G01D15/14—Optical recording elements; Recording elements using X-or nuclear radiation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Abstract
883,516. Recording-processes. MINNEAPOLIS - HONEYWELL REGULATOR CO. Dec. 20, 1957 [Dec. 28, 1956; Feb. 7, 1957 (2)], No. 39655/57. Drawings to Specification. Class 106 (4). A process for recording on a photographic film, one or more visible traces representing the variations with time of one or more phenomena under observation comprises an all-over exposure to radiation at a level below that needed to produce a readily visible image but sufficient to fog the film slightly before exposure to a high-intensity recording beam. After the recording beam has produced a latent trace, the film is subjected to an all-over exposure of a duration and intensity sufficient to render the latent trace visible. A film suitable for this process includes an emulsion containing silver citrate and/or an excess of silver nitrate. Suitable pre-exposure times are a constant exposure for 14 hours to a 100-watt incandescent lamp at 9 feet or for half an hour to a 40-watt incandescent lamp at 1 foot. Pre-exposure to fluorescent radiation permits a reduction in pre-exposure time but results in loss of writing speed and contrast in recording. Pre-exposure for half an hour to a 40-watt incandescent lamp at 1 foot with the energy supplied increasing exponentially with time from zero is also suitable. The latent trace is produced with radiant energy from a mercury lamp in the apparatus described in Specification 883,517. The postexposure step may be for a tenth of a second at 12 inches from a mercury lamp or at 2 to 6 inches from a 105-115 volt fluorescent lamp. The trace is finally stable, but permanent stability may be ensured by chemically processing the film either before or after the postexposure step.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US883516XA | 1956-12-28 | 1956-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB883516A true GB883516A (en) | 1961-11-29 |
Family
ID=22210872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB39655/57A Expired GB883516A (en) | 1956-12-28 | 1957-12-20 | Improvements in or relating to recording processes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB883516A (en) |
-
1957
- 1957-12-20 GB GB39655/57A patent/GB883516A/en not_active Expired
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