Motion sensing apparatus
US4418950A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1981 |
| Grant date | Dec 6, 1983 |
| Priority date | — |
| Expiry date | Jan 9, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/1021
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A safety latching apparatus for a cover of a machine enclosing a round rotatable member. The apparatus includes a latch member, and an elongated flexible control element for sensing the motion of the rotatable member to automatically prevent opening of the cover when the member is rotating. The control element is movable longitudinally so that one of its ends can be brought into contact with the rotatable member and the other end connected to a latching mechanism located adjacent the machine cover. When the rotatable member is stationary, the end of the control element brought into contact with it remains generally rigid to a force in the longitudinal direction allowing the latch member to move to an unlocked position. When the rotatable member is rotating, the contact end of the control element is deflected to one side presenting no rigidity to a force in the longitudinal direction permitting the other end of the control element to recede from its rigid position and thereby prevent the latch member from moving to an unlocked position. An anti-flexing guide member is positioned alongside the contact end of the elongated member to assure that it remains generally rigid when the rota…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.