Multiple position rotary switch
US4876416A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1989 |
| Grant date | Oct 24, 1989 |
| Priority date | — |
| Expiry date | Feb 3, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H19/585
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multiple position rotary switch is disclosed for incorporation into an electrical device. The switch comprises an annular cup that serves as a housing for the switch and which receives a knob for rotation therein. The knob is retained within the cup by a circuit board that is removably secured to the cup. The circuit board includes a first major surface having a switching circuit formed thereon and a second major surface. The circuit board is removably secured to the cup by a plurality of barbed ears which extend from the sidewall of the cup such that the first surface of the board is located between the knob and the second surface of the board. The cup includes an upstanding sidewall and a race against which the knob rotates. The race includes a plurality of protrusions which facilitate the retention of the knob in preselected positions as the knob is rotated. The knob comprises a cylindrical disk having on one surface a handle. Along its opposite surface the knob includes a plurality of wipers that rotate with the knob and contact the switching circuit formed on the first surface of the circuit board. The wipers selectively close the switching circuit when the knob is rotated t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.