Stair stringer layout jig

Details Stair stringer layout jig Stair stringer layout jig

1994-11-09

1995-10-31

Fulton, Christopher W.

Geometrical instruments

Gauge

Template

33415, 33418, 33526, B43L 712, B43L 1302

Patent

active

054617987

ABSTRACT:
A stair stringer layout jig used on a pair of stringers disposed side-by-side adjacent one another comprises a longitudinal base lying along and between the stringers, with spacers for uniformly spacing the stringer sides. A transverse member with two clamps is connected to the base to squeeze the stringers together. A pair of carpenter's squares are disposed symmetrically in mirror relationship on opposite sides of the stringers so as to allow the legs of the squares to pivot. A vernier adjustment serves to simultaneously pivot the carpenter's squares in opposite directions about their pivot points, so as to lay out stair riser and stair tread locations which may be simultaneously and identically varied in mirror relationship on both of said stringers.

REFERENCES:
patent: 136653 (1873-03-01), Hyman
patent: 168656 (1875-10-01), McInnes
patent: 327283 (1885-09-01), Levy
patent: 796030 (1905-08-01), Baumgartner
patent: 831870 (1906-09-01), Huyett
patent: 935067 (1909-09-01), Taylor
patent: 1995658 (1935-03-01), Thompson
patent: 2087102 (1937-07-01), Chandler
patent: 3250014 (1966-05-01), Watson
patent: 3478434 (1969-11-01), Catalano
patent: 4580352 (1986-04-01), Wilson

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