Miter box with electronic measuring of lumber

Details Miter box with electronic measuring of lumber Miter box with electronic measuring of lumber

1996-03-01

1998-04-07

Bray, W. Donald

Woodworking

Miter cutter

33773, 8352221, 384297, B27G 500

Patent

active

057353247

ABSTRACT:
The invention is directed to measuring the length of a piece of wood to be cut in a miter box, a frame and trim saw, a radial saw and the like. The miter box includes a back (24) having a surface (24a) against which the piece of wood is placed and slid into position for cutting by the saw blade of the miter box. A roller (30) is positioned at and extends slightly beyond surface (24b), and is mechanically and thence electrically connected to a LCD display (54). The roller is mechanically connected to a rotary disc (42) by any suitable means, such as by a secondary roller (34) and gears or by a cord (40) and pulley mechanism. Wiper contacts 60 are slidable on and against a surface of disc (42), and are electrically connected to LCD display (54). A reset switch (68) and/or a spring switch on surface (24a) enables the reading on display (54) to be reset, for example, to 1/2" which is the distance from a starting point and the path of saw blade travel. In operation, linear movement of the wood towards the saw blade cutting position causes roller (30) to rotate. This rotation is translated through disc (42) and wiper contacts (60) to conversion mechanism (58) and thence to display (54) to illustrate the distance of linear travel in the display. The read out from the display thus measures the length of wood to be cut.

REFERENCES:
patent: 1275370 (1918-08-01), Best
patent: 3077804 (1963-02-01), Manaloris
patent: 3597847 (1971-08-01), Anderson
patent: 3709078 (1973-01-01), Mills
patent: 3972124 (1976-08-01), Mikolajczyk
patent: 4050160 (1977-09-01), Schmitt
patent: 4577411 (1986-03-01), Martin
patent: 5027526 (1991-07-01), Crane
patent: 5142793 (1992-09-01), Crane
patent: 5197200 (1993-03-01), Bahr et al.
patent: 5220731 (1993-06-01), Waclawik et al.
patent: 5301427 (1994-04-01), Swatek

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