Patent information:
| Patent: | Utility 1,677,498 |
| Patented: | July 17, 1928 |
| Applied: | January 11, 1927 |
| Title: | Apparatus for Undercutting Pinholes in the Center Shells of Insulators |
| Description: | Machine to undercut the pinhole for the suspension pin to prevent the pin from pulling out of the insulator. |
| Category: | Suspension |
| Assigned to: | Electric Service Supplies Co. |
Patentee Information:
| SMITH, William Henry | Norristown, PA |
Class and subclass information:
| Class: | 425 | PLASTIC ARTICLE OR EARTHENWARE SHAPING OR TREATING: APPARATUS |
| Subclass: | 263 | POTTERY WHEEL TYPE SUPPORT AND PROFILE; |
| Class: | 264 | PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES |
| Subclass: | DIG.54 |
Known specimens:
| None known |
Drawings:
Page 1 |