Stud finder with level indicator
US5148108A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 1991 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Mar 14, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A stud finder includes a magnetic subassembly for detecting the presence of a ferrous metal object, such as the head of a nail or screw, in a wall, with the magnetic subassembly being mounted at one end of a base member. A level vial is mounted at the other end of the base member, and a slot is formed in the base member between the magnetic subassembly and the level vial. When the base member is placed against a wall and the presence of a stud is detected by the magnetic subassembly, the base member is moved to a position in which the level vial indicates level. The slot has its longitudinal axis oriented perpendicular to the longitudinal axis of the level vial, so that the user can place a vertical mark on the wall through the slot. The slot is oriented so as to be in vertical alignment with the nail or screw head, when the base member is moved such that the magnetic subassembly is directly over the nail or screw head. With this arrangement, the mark made on the wall by the user is vertically aligned with the nail or screw head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.