Method for aligning loudspeaker diaphragm and voice coil assembly
US3967367A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1975 |
| Grant date | Jul 6, 1976 |
| Priority date | — |
| Expiry date | Oct 14, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49895
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A technique for accurately aligning the voice coil of a high frequency driver type loudspeaker in an annular magnetic gap formed between the top plate and the pole piece-phasing plug assembly thereof. A pair of dowels are attached to the top plate by means of screws, at positions separated from each other. The inside diameter of the dowels is greater than the diameter of the screws so as to permit radial adjustment of the position of the dowels on the screws. The screws are first left loose so that the dowels have limited freedom of radial movement. A jig member having a plurality of radial finger portions arranged in a circle is placed over the pole piece-phasing plug assembly with the ends of the finger portions lying in the magnetic gap against the side of the phasing plug. The voice coil diaphragm assembly is then placed over the jig member with the voice coil in the magnetic gap formed between the top plate and the pole piece-phasing plug, and with locating aperture portions of the assembly fitted over the dowels, the jig fingers having a thickness such as to provide proper centering of the coil. The dowels are freed to move radially on their associated screws to permit the po…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.