http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-883516-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c2ca20a90e04247265f4c53e2934868d |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01D15-14 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01D15-14 |
| filingDate | 1957-12-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1961-11-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-883516-A |
| titleOfInvention | Improvements in or relating to recording processes |
| 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. |
| priorityDate | 1956-12-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 16.