05812057 is referenced by 24 patents and cites 2 patents.

A detector device for finding concealed studs in partitioning includes a pair of plates which are supplied with ac via resistors. Amplifiers produce outputs representing the sum and difference respectively of the signals imposed on the plates. The sum signal drives a display enabling circuit including a comparator which enables a display means to operate when the sum signal exceeds a threshold level. The difference signal drives two comparators which control three display device such that one display device is operated only when the detector device is over the center of a stud. The other display devices indicate which way the detector should be moved to place it over the center of the stud.

Title
Device for finding concealed studs
Application Number
8/702661
Publication Number
5812057
Application Date
October 31, 1996
Publication Date
September 22, 1998
Inventor
Paul Hatcher
Godalming
GB
Brian Edward Brooks
Burton-on-Trent
GB
Paul Steabben Hepworth
Guildford
GB
Agent
Thomason & Moser
Assignee
Turner Intellectual Property
GB
IPC
G05B 21/00
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