Patent information:
| Patent: | Utility 2,218,497 |
| Patented: | October 15, 1940 |
| Applied: | December 3, 1938 |
| Title: | Electrical Insulator |
| Description: | Rubber pin type insulator (see 2,304,483) |
| Category: | Rubber |
| Assigned to: | Western Union Telegraph Co. |
Patentee Information:
| SMITH, Donald H. | Hempstead, NY |
| WHEELER, Herbert H. | Millburn, NJ |
Class and subclass information:
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 211 | INSULATORS; With moisture or dirt removing or shedding; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 137R | INSULATORS; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 202 | INSULATORS; With terminal elements; Pin type; Screw or bayonet type; |
Known specimens:
| Number: |  |
Drawings:
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