Method and apparatus for machining components for stairs

Details Method and apparatus for machining components for stairs Method and apparatus for machining components for stairs

1978-02-08

1979-08-14

Spruill, Robert Louis

Woodworking

Process

33454, 144136B, B27C 510

Patent

active

041642490

ABSTRACT:
An apparatus that facilitates the manufacture of wooden stairs of the type having treads and risers extending between and affixed to side housings or stringers. The apparatus provides multiple, parallel guides for the router used to cut the grooves in the stringers into which are fitted the treads and risers. By using a parallelogram construction for the multiple guides, the apparatus can be quickly adjusted and set to produce almost any size of stairs. An index bar used with the apparatus allows the apparatus to be quickly set for the particular stairs desired so that the grooves for both the treads and risers can be cut quickly and accurately in the stringers. The router is moved along each of the parallel guides to cut the grooves for all of the treads, and then the apparatus is quickly and easily reset and locked into position to set the guides for cutting of the grooves for the risers.

REFERENCES:
patent: 650992 (1900-06-01), Sawyer
patent: 827233 (1906-07-01), Gould
patent: 831204 (1906-09-01), Woolf
patent: 1306252 (1919-06-01), Dauger
patent: 2645028 (1953-07-01), Altnether

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