Woodworking – Process – Mechanical cutting or shaping
Patent
1985-04-22
1986-07-15
Husar, Francis S.
Woodworking
Process
Mechanical cutting or shaping
144379, 144216, 83762, 269295, 33185R, B27M 300
Patent
active
046000445
ABSTRACT:
A method and apparatus for joining fittings, particularly wooden stair rail fittings. The apparatus includes a mitre jig and a double slot jig. The mitre jig has a base with a curved bed for supporting the fitting to be cut. A wall is used with the base that has on it a scale for indicating the angle of incline of the stair being worked with. A recess in the wall accommodates a saw and a slot in the wall receives the saw blade. The fitting is placed on the base with its seam aligned with the particular indication for the stair's angle of incline. A saw is then used to cut the fitting. The double slot jig is used to cut slots into the ends of fittings for joining them. The double slot jig has a base, a tray, a double-bladed cutting apparatus, and a frame. The tray supports the fitting to be cut and is movable on the base. Appropriate stops are used to correctly position the fitting on the base and to limit the movement of the tray on the base. A drill with double circular blades can be used. It is mounted to the frame above the tray. The fitting to be cut is placed on the tray and the tray is moved on the base until the fitting contacts the double saw blades. The cutting proceeds until the tray contacts a stop block.
REFERENCES:
patent: 952270 (1910-03-01), Milks
patent: 1883392 (1932-10-01), Moll
patent: 2108992 (1938-02-01), Obenshain
patent: 2741282 (1956-04-01), Wieting
patent: 2822836 (1958-02-01), Horstmann et al.
patent: 4050975 (1977-09-01), Draffone
patent: 4189132 (1980-02-01), DiRusso
patent: 4218947 (1980-08-01), Laviola
patent: 4244102 (1981-01-01), Bolles
"Stair World-Coffman," 1982, pp. 21, 23.
Griffin Jorh M.
Husar Francis S.
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