Patent information:
| Patent: | Utility 1,022,874 |
| Patented: | April 9, 1912 |
| Applied: | August 8, 1908 |
| Title: | Machine for Drilling Porcelain |
| Description: | Machine for drilling U-shaped holes in Hewlett suspension disk |
| Category: | Suspension |
| Assigned to: | General Electric Co. |
Patentee Information:
| RIDDELL, John | Schenectady, NY |
Class and subclass information:
| Class: | 408 | CUTTING BY USE OF ROTATING AXIALLY MOVING TOOL |
| Subclass: | 109 | |
| Class: | 144 | WOODWORKING |
| Subclass: | 93.1 | BORING MACHINE; Special work; |
| Class: | 408 | CUTTING BY USE OF ROTATING AXIALLY MOVING TOOL |
| Subclass: | 111 | |
| Class: | 409 | GEAR CUTTING, MILLING, OR PLANING |
| Subclass: | 205 | |
| Class: | 409 | GEAR CUTTING, MILLING, OR PLANING |
| Subclass: | 211 |
Known specimens:
| None known |
Drawings:
Page 1 |
Page 2 |
Page 3 |