Torque responsive motor-drive assembly
US4827199A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1988 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Mar 15, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47H5/0325
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A traverse rod having a reversible torque responsive motor-drive assembly for operating the traverse rod. The motor-drive assembly includes a stationary casing fixed to the rod and a movable casing mounted in the stationary casing for angular movement relative thereto about a turn axis. A reversible DC motor in the movable casing is connected through a planetary gear speed reducer to a traverse cord drive wheel for applying driving torque thereto. The movable casing is arranged to turn about the turn axis in opposition to the torque applied to the drive wheel and is yieldable urged angularly about the turn axis toward a preselected neutral position relative to the stationary casing. The motor-drive assembly has a torque responsive motor control including stationary brush contacts fixed on the stationary casing and adapted for connection to a power supply and movable electrically conductive segments fixed on the movable casing and electrically connected to the motor. The movable electrically conductive segments include primary segments arranged to engage the brush contacts when the movable casing is in the neutral position and auxiliary segments spaced angularly about the turn axis …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.