Electric lamp base and method of assembly
Patent 4029387 Issued on June 14, 1977. Estimated Expiration Date: 
June 14, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 14, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.InventorApplicationNo. 05/634354 filed on 11/24/1975US Classes:439/662, Screw threads formed on cylindrical or annular contact313/318.03, Having an annular contact disposed concentrically about the longitudinal axis of the envelope313/318.04, Having screw thread coupling contact439/615Having screw-thread-coupling contactExaminersPrimary: Lake, RoyAssistant: Desmond, E. F. Attorney, Agent or FirmAbstractA base assembly and method for electric incandescent lamps in which a preformed base insulator and contact eyelet are assembled with a conventional base shell by threading the insulator and contact eyelet as a subassembly into the shell. Provision is made for retaining the insulator and the metallic shell against unthreading rotation either by a direct binding of portions of the insulator and the shell or by serrating the inner edge of an in-turned flange on the shell in a manner to allow threading rotation of the insulator and shell but to prevent unthreading rotation of these parts. | |
