http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3868545-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e1884d23fd6743b5ee7eb3d09b6e461d |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05C1-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H05C1-04 |
| filingDate | 1973-09-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1975-02-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a98ab72d2bfb02af645f9b42b6ff533c |
| publicationDate | 1975-02-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-3868545-A |
| titleOfInvention | Variable frequency electric fence charging circuit |
| abstract | A variable frequency electric fence charging circuit for supplying charge pulses to a conductive fence wire at selected frequencies adapted to the particular livestock to be restrained comprises a firing circuit utilizing a silicon controlled rectifier connected to the primary winding of a step-up transformer and connectable to an alternating current source to deliver a charging pulse through the transformer to a fence wire when the silicon controlled rectifier is made conducting by a triggering circuit. The triggering circuit includes an oscillator with its output connected to the gate of the silicon controlled rectifier to selectively, periodically open the gate to permit current flow from the alternating current source to the primary winding of the transformer, inducing a high voltage in the secondary winding which is applied to the fence wire. The time constant of the oscillator may be varied by the operator to produce two distinct oscillator frequencies, permitting use of the frequency best adapted to the livestock to be restrained. The triggering circuit energizes the oscillator in synchronization with the alternating current source to assure that the oscillator opens the gate only when the alternating current source nears a peak voltage magnitude to assure high voltage being applied to the transformer primary. The charging circuit is protected from lightning or other high voltage transients reaching it from either the fence wire or the alternating current source. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2469084-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-19909837-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5877949-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4118752-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4396879-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7582988-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9265230-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5304211-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4316232-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5790023-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4939618-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008079316-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7096792-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7944669-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4819914-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4270735-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009002912-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5381298-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0018849-A1 |
| priorityDate | 1973-09-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.