Warning: Constant Data already defined in /home/encicl/public_html/w/LocalSettings.php on line 259

Warning: Constant Discuţie Data already defined in /home/encicl/public_html/w/LocalSettings.php on line 260

Warning: session_name(): Session name cannot be changed after headers have already been sent in /home/encicl/public_html/w/includes/Setup.php on line 531

Deprecated: Creation of dynamic property LoadBalancer::$mWriteIndex is deprecated in /home/encicl/public_html/w/includes/db/LoadBalancer.php on line 65

Deprecated: Return type of ResultWrapper::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/encicl/public_html/w/includes/db/DatabaseUtility.php on line 197

Deprecated: Return type of ResultWrapper::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/encicl/public_html/w/includes/db/DatabaseUtility.php on line 215

Deprecated: Return type of ResultWrapper::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/encicl/public_html/w/includes/db/DatabaseUtility.php on line 208

Deprecated: Return type of ResultWrapper::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/encicl/public_html/w/includes/db/DatabaseUtility.php on line 225

Deprecated: Return type of ResultWrapper::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/encicl/public_html/w/includes/db/DatabaseUtility.php on line 186

Deprecated: Return type of ExplodeIterator::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/encicl/public_html/w/includes/utils/StringUtils.php on line 576

Deprecated: Return type of ExplodeIterator::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/encicl/public_html/w/includes/utils/StringUtils.php on line 590

Deprecated: Return type of ExplodeIterator::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/encicl/public_html/w/includes/utils/StringUtils.php on line 583

Deprecated: Return type of ExplodeIterator::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/encicl/public_html/w/includes/utils/StringUtils.php on line 609

Deprecated: Return type of ExplodeIterator::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/encicl/public_html/w/includes/utils/StringUtils.php on line 558

Deprecated: Creation of dynamic property Revision::$mTextId is deprecated in /home/encicl/public_html/w/includes/Revision.php on line 536

Deprecated: Creation of dynamic property Revision::$mUnpatrolled is deprecated in /home/encicl/public_html/w/includes/Revision.php on line 696

Deprecated: Creation of dynamic property WikitextContentHandler::$mModelName is deprecated in /home/encicl/public_html/w/includes/content/ContentHandler.php on line 416

Deprecated: Creation of dynamic property RequestContext::$recursion is deprecated in /home/encicl/public_html/w/includes/context/RequestContext.php on line 328

Deprecated: header(): Passing null to parameter #3 ($response_code) of type int is deprecated in /home/encicl/public_html/w/includes/WebResponse.php on line 37

Warning: Cannot modify header information - headers already sent by (output started at /home/encicl/public_html/w/LocalSettings.php:259) in /home/encicl/public_html/w/includes/WebResponse.php on line 37

Deprecated: header(): Passing null to parameter #3 ($response_code) of type int is deprecated in /home/encicl/public_html/w/includes/WebResponse.php on line 37

Warning: Cannot modify header information - headers already sent by (output started at /home/encicl/public_html/w/LocalSettings.php:259) in /home/encicl/public_html/w/includes/WebResponse.php on line 37

Deprecated: header(): Passing null to parameter #3 ($response_code) of type int is deprecated in /home/encicl/public_html/w/includes/WebResponse.php on line 37

Warning: Cannot modify header information - headers already sent by (output started at /home/encicl/public_html/w/LocalSettings.php:259) in /home/encicl/public_html/w/includes/WebResponse.php on line 37

Deprecated: header(): Passing null to parameter #3 ($response_code) of type int is deprecated in /home/encicl/public_html/w/includes/WebResponse.php on line 37

Warning: Cannot modify header information - headers already sent by (output started at /home/encicl/public_html/w/LocalSettings.php:259) in /home/encicl/public_html/w/includes/WebResponse.php on line 37

Warning: Cannot modify header information - headers already sent by (output started at /home/encicl/public_html/w/LocalSettings.php:259) in /home/encicl/public_html/w/includes/cache/HTMLFileCache.php on line 138

Warning: Cannot modify header information - headers already sent by (output started at /home/encicl/public_html/w/LocalSettings.php:259) in /home/encicl/public_html/w/includes/cache/HTMLFileCache.php on line 139
Ion C. Constantinescu - Enciclopedia României - prima enciclopedie online despre România

Ion C. Constantinescu

de la Enciclopedia României

Salt la: navigare, căutare

Ion C. Constantinescu (n. 15 octombrie 1884, Recea, comuna Valea Mare, judeţul Olt - d. 5 februarie 1963, Bucureşti), inginer. Este inventatorul aparatului teletipografic şi proiectantul primei centrale telefonice automate, Dacia II.

Biografie

Studiile liceale le-a încheiat la Şcoala de telegrafişti, iar apoi s-a înscris la Facultatea de matematici a Universităţii din Bucureşti. A continuat studiile la Şcoala superioară de electricitate din Paris, iar apoi a devenit profesor universitar la Institutul Politehnic din Bucureşti (1924-1950). În cadrul Institutului Politehnic din Bucureşti, a fost cel care a pus bazele învăţământului superior de telecomunicaţii.

În timpul studiilor de la Paris a obţinut un brevet de invenţie francez pentru aparatul teletipografic care stă la baza teleimprimatoarelor moderne. În 1925 a studiat propagarea undelor electromagnetice, stabilind condiţiile pentru obţinerea dipolilor complementari. A fost cel care a studiat şi proiectat în 1927 prima centrală telefonică automată, Dacia II.

Opera

  • Manual de aparate şi instalaţiuni telegrafice şi telefonice, Bucureşti (1923)
  • Curs de transmisiuni telegrafice şi telefonice (1928)
  • Curs de unde electromagnetice şi circuite electrice (1941)
  • Transmisii electromagnetice (1947)

Bibliografie

  • Stanciu, N., Dicţionar tehnic de radio şi televiziune, Editura Ştiinţifică şi Enciclopedică, Bucureşti, 1975