Patent information:
| Patent: | Utility 199,506 |
| Patented: | January 22, 1878 |
| Applied: | January 9, 1878 |
| Title: | Improvement in Insulating Underground Telegraph Wires |
| Description: | Underground cable insulated by wrapping with cotton, hemp, or jute and saturating it with paraffin and inserting the wires in heated metal pipes flushed with air to remove moisture. |
| Category: | Cable |
| Assigned to: |
Patentee Information:
| BROOKS, David | Philadelphia, PA |
Class and subclass information:
| Class: | 156 | ADHESIVE BONDING AND MISCELLANEOUS CHEMICAL MANUFACTURE |
| Subclass: | 53 | METHODS; Making electrical conductors of indefinite length; Covering of conductor; With preformed material; Wrapping of sheet material (e.g., tape) about conductor and/or conductor assembly; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 10 | WITH FLUIDS OR VACUUM; With cable or conduit preinstallation devices; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 14R | WITH FLUIDS OR VACUUM; With fluid maintenance or conditioning means; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 16.1 | WITH FLUIDS OR VACUUM; With cooling or fluid feeding, circulating or distributing; By ventilation or gas circulation; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 17GF | WITH FLUIDS OR VACUUM; Boxes and housings; Gas filled; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 27 | WITH FLUIDS OR VACUUM; Conduits, cables and conductors; Parallel or twisted conductors; |
| Class: | 313 | ELECTRIC LAMP AND DISCHARGE DEVICES |
| Subclass: | 545 | HAVING VALVE WITH GETTER, GAS/VAPOR GENERATING MATERIAL OR PRESSURE CONTROL MEANS; |
Known specimens:
| None known |
Drawings:
Page 1 |