Magnetic plumb bob holder
US6976316B1 · kind B1 · utility
9Cited by
7References
11Claims
0Family size
Inventor
Key dates
| Filing date | Dec 22, 2000 |
| Grant date | Dec 20, 2005 |
| Priority date | — |
| Expiry date | Jun 18, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C15/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An inspection tool for measuring the true of metal door frames uses a plumb bob. The plumb bob is suspended from a holder which may be attached to a door frame by magnets in the body of the holder. The relationship of the holder dimensions models the relationship of the dimensions of a metal door frame. The point indicated by the plumb bob will have the same dimensions from the door frame if the frame is true. If the frame is not true, the point will have different measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.