http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-946459-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_18048eac8400ecbe492a75dcdcbf7cac |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N15-0656 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N9-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N9-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N15-06 |
| filingDate | 1960-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2dc6331df9bf81c13ccdbfa91abab871 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3ed3a95941a56b0f1b64f018ed0228f6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_67fc37021dc5528457e7aa1c1b9cf162 |
| publicationDate | 1964-01-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-946459-A |
| titleOfInvention | Apparatus for detecting and controlling the presence of sewage sludge in a liquid |
| abstract | 946,459. Automatic density control. COUNTY COUNCIL OF THE ADMINISTRATIVE COUNTY OF MIDDLESEX. April 27,1960, No. 14761/60. Heading G3R. Electrodes in liquid sewage are in the primary circuit of a transformer the secondary circuit of which is connected to the input of an electronically operated relay which is actuated when the conductivity of the sewage has a predetermined adjustable value. As shown, but with switches 4, 17 in their other position, one of several pairs of carbon electrodes, such as 32, 33, immersed in liquidfilled hoppers or tanks (not shown), is selected by a switch 30 and connected through leads 18, 19 to the 12v A.C. source shown that the current flowing through a potentiometer 14 is dependent on the conductivity of the liquid and hence the amount of sewage or other sludge present in it. If this amount exceeds a predetermined value determined by the setting of potentiometer 14 the signal applied to the grid-cathode circuit of a triode valve 1 is sufficient to overcome an opposing alternating bias voltage from a potentiometer 22 so that the valve conducts and energizes a thermal delay relay 6 which thereupon operates means such as pumps, valves and/or penstock motors to lower the concentration of sludge. By moving switches 4,17 to the position shown the predetermined value of sludge concentration at which the control operates is set by adjusting a potentiometer 29 until a milliammeter 28 indicates an appropriate current, and then adjusting potentiometer 14 until a lamp 23 operates. Instead of valve 1 operating as a switching device as described its output current may be made proportional to the amount of sludge by removing a condenser 10 so that the grid and anode voltages of valve 1 are not exactly in phase opposition. Switch 30 may be operated manually or may be operated automatically to detect the amount of sludge at different points in succession according to a predetermined programme. Switch 30 may also feed another similar system B maintaining sludge at a different concentration in a second stage of a setting out process, each system being connected for a time determined by time switches 37. |
| priorityDate | 1960-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID297 http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID419559581 |
Total number of triples: 17.