Invention Grant
- Patent Title: Electric lamp filament having a coiled-coil body portion with oriented offset legs,and method of manufacture
- Patent Title (中): 具有带定向偏心杆的线圈体部分的电灯丝及其制造方法
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Application No.: US3588579DApplication Date: 1967-06-23
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Publication No.: US3588579APublication Date: 1971-06-28
- Inventor: MICHAEL JACOB F
- Applicant: WESTINGHOUSE ELECTRIC CORP
- Assignee: Westinghouse Electric Corp
- Current Assignee: Westinghouse Electric Corp
- Priority: US64843067 1967-06-23
- Main IPC: H01K1/14
- IPC: H01K1/14 ; H01J1/16 ; H01J19/10
Abstract:
A COILED-COIL FILAMENT OF REFRACTORY METAL WIRE HAVING LONGITUDINALLY DEPENDING LEGS AT EACH END THAT ARE JOINED TO THE COIL BARREL BY OPEN PRIMARY TURNS WHICH ARE BENT THROUGH PREDETERMINED ANGLES. THE PRIMARY WINDING IS FORMED AS A CONTINUOUS COIL AND, AFTER THE SECOND COILING OPERATION HAS BEEN COMPLETED AND THE PRIMARY AND SECONDARY MANDRELS HAVE BEEN REMOVED, SELECTED PRIMARY AND SECONDARY MANDRELS THE TRANSVERSELY EXTENDING LEGS ARE BENT AROUND AN ABUTTING STATIONARY ANVIL TO REPOSITION THE LEGS.
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