Control device for electric motor-reducing unit
US4411348A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1980 |
| Grant date | Oct 25, 1983 |
| Priority date | — |
| Expiry date | Apr 30, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19874
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This control device for an electric motor-reduction unit is designed to permit the accurate adjustment of the point at which it is desired to stop the rotation of the unit. For this purpose, it comprises a slide controlling during its movement in one direction and during a first time period the movement of beaks of a rocker in a direction in order to open the motor control switch when said beaks are engaged in notches of cam means. In a second time period, the slide causes a two-armed sliding lever supporting the notched-cam shaft to pivot in a direction, each notched cam being rigidly associated with a heart-shaped cam and with a toothed wheel adapted, when inoperative, to mesh with toothed drive pinions. In a third time period, the slide causes the beaks of the aligning lever to bear against the heart-shaped cams in order to align the notches with the beaks. The pinions remain radially fixed. This device is particularly suited for controlling electric motor-reduction units for driving rolling shutters, roller-blinds and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.