Insulative stress relief film

• US 3,349,164 A
• Filed: 12/28/1965
• Issued: 10/24/1967
• Est. Priority Date: 12/28/1965
• Status: Expired due to Term

• Current Assignee: Gerald A. Wyatt
• Original Assignee: Gerald A. Wyatt
• Inventors: Wyatt, Gerald A.
• Application Number:
  US04/517,038
• Time in Patent Office: 665 Days
• US Class Current: 174/73.1
• CPC Class Codes: H01B 3/004 with conductive additives or conductive layers
• CPC Class Codes: H01B 3/44 vinyl resins; acrylic resins silicones H01B3/46
• CPC Class Codes: H01B 3/441 from alkenes
• CPC Class Codes: H02G 15/003 Filling materials, e.g. solid or fluid insulation
• CPC Class Codes: H02G 15/10 protected by boxes, e.g. by distribution, connection or junction boxes
• CPC Class Codes: H02G 15/103 with devices for relieving electrical stress
• CPC Class Codes: H02G 15/18 protected by sleeves, e.g. for communication cable two-part covers H02G15/10 ; preforms having internal stresses B29C61/00
• CPC Class Codes: H02G 15/184 with devices for relieving electrical stress
• CPC Class Codes: H02G 15/188 connected to a cable shield only
• CPC Class Codes: H02G 15/196 having lapped insulation

Claims

1. A THIN INSULATING FILM HAVING A BREAKDOWN VOLTAGE OF AT LEAST ABOUT 200 VOLTS PER MIL AND A DIELECTRIC CONSTANT IN THE PLANE OF THE FILM OF AT LEAST ABOUT TEN AND AT LEAST ABOUT ONE-FOURTH GREATER THAN THE DIELECTRIC CONSTANT IN THE DIRECTION PERPENDICULAR THERETO, SAID FILM CONSISTING ESSENTIALLY OF FLEXIBLE AND CONFORMABLE ORGANIC PLASTIC FILM-FORMING COMPOSITION CONTAINING OVERLAPPING SPACED THIN SMALL ELECTRICALLY CONDUCTIVE PLATELETS UNIFORMLY DISTRIBUTED THERETHROUGH AND PLANARLY ORIENTED IN THE PLANE OF SAID FILM.