Geometrical instruments – Straightedge type – Square and sliding nonpivotal straightedge
Patent
1996-10-21
1998-07-14
Bennett, G. Bradley
Geometrical instruments
Straightedge type
Square and sliding nonpivotal straightedge
33476, 33479, 33708, G01B 702
Patent
active
057785473
ABSTRACT:
An improved electronic combination square (10) comprising an elongate blade (12) constructed of a nonmagnetic material. An elongate conductor strip (14) constructed of a magnetic material is connected longitudinally into a recessed top surface of the blade (12). A head (16) is provided having two ninety degree angle sides (18), (20) and two forty five degree angle sides (22), (24) constructed of a non-magnetic material. A facility (26) is for allowing the head (16) to slide to any position along the blades (12) over the conductor strip (14) from either of the two ninety degree angle sides (18), (20). A structure (28) is for locking the head (16) to the blade (12) from either of the two ninety degree angle sides (18), (20). A component (30) in the head (16) is for actuating a signal magnetically, relative to the position of the head (16) on the conductor strip (14) in the blade (12). An assembly (32) in the head (16) is for outputting a visual representation of a dimension measured by the head (16) in accordance with the signal received from the signal actuating component (30).
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Bennett G. Bradley
Kroll Michael I.
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