Pointing device with improved pivot
US5402150A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1993 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Jun 24, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/03549
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A pivotable trackball-type computer command pointing device for entering commands into a computer has a housing and a ball retained within the housing for generating electrical signals translatable into commands for the computer. A coupling assembly removably attaches to the computer, preferably the keyboard. A knuckle joint assembly pivotally connects the housing to the coupling assembly and includes a pivot blade pivotally received in an elongated recess of a hinge pocket plate to define an axis of rotation within the housing about which the housing is rotatable. Opposing button members each carry actuation teeth which engage a corresponding row of teeth formed in a coupling frame held stationary with respect to the computer by the coupling assembly. When the button members are moved together, the actuation teeth disengage the rows of teeth to permit the housing to be selectively angularly oriented by the user. Alternatively, pawls and corresponding ratchet teeth are used to provide unidirectional orientation of the housing upon depressing one of the two button members. In another alternative embodiment, a brake member having a high coefficient of friction is used to provide a br…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.