Patent information:
| Patent: | Utility 579,725 |
| Patented: | March 30, 1897 |
| Applied: | November 27, 1896 |
| Title: | Insulator and Holder for Electric Railways |
| Description: | Trolley hanger insulator suspended from a cable. It is composed of an inverted insulator cup and a metal cover. |
| Category: | Trolley Hanger |
| Assigned to: |
Patentee Information:
| KEITHLY, Willie C. | San Francisco, CA |
Class and subclass information:
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 160 | INSULATORS; With insulator-supporting or attaching means; Strand engaging suspension means; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 139 | INSULATORS; Combined; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 193 | INSULATORS; With terminal elements; Cap type; Screw or bayonet; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 202 | INSULATORS; With terminal elements; Pin type; Screw or bayonet type; |
| Class: | 191 | ELECTRICITY: TRANSMISSION TO VEHICLES |
| Subclass: | 42 | CONDUCTORS; Trolley; Supports; Combined ears and insulator; |
Known specimens:
| None known |
Drawings:
Page 1 |