Cam controlled switching means for ice maker
US4142378A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1977 |
| Grant date | Mar 6, 1979 |
| Priority date | — |
| Expiry date | Dec 2, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25C2305/0221
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An automatic ice maker mechanism includes a face cam on a timing motor driven disc formed with a plurality of concentric cam tracks. The disc is supported on one side of a circuit board, said board having a plurality of flexible blade switches cantilever supported on its other side. The mechanism further includes a plurality of slidable cam follower plunger pins each of which is contacted by an associated blade switch such that each pin is biased into spaced follower relation with one of the cam tracks. In operation the circuit board control circuit interconnects ice maker cycling means with the motor to initiate rotation of the disc whereby the cam track profile effects predetermined movement of its associated pin in one direction causing the contact on an associated blade switch to open with its stationary contact. Continued rotation of the disc results in the blade switch moving its follower pin in the opposite direction reclosing the contacts such that selected functions of the ice maker are performed in a predetermined sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.