Pendulum jigsaws

Cutlery – Cutting tools – Saw

Patent

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Details

B23D 4904

Patent

active

052050432

ABSTRACT:
FIG. 2 shows a jigsaw in which pendulum motion in imparted on the blade (24) (see FIG. 1) by a bell crank lever (28) mounting a support wheel (26). The lever (28) is actuated by pin (34) passing through adjustment shaft (36). The pin (34) is actuated by fork lever (42) journalled around circular cam surface (48) and pivoted on axis (44). Cam surface (48) is eccentrically mounted on gear shaft axis (10). Rotational adjustment of shaft (36), which changes amplitude of reciprocation of pin (34) responsive to fork lever cam surface (54) is effected by pin (60) passing through shaft (36) and pivotally mounted in slide switch (70). Arrangement allows for compact design of saw.

REFERENCES:
patent: 2946358 (1960-07-01), Bruck
patent: 3264443 (1966-08-01), Farina et al.
patent: 3971132 (1976-07-01), Griffies et al.
patent: 4010380 (1977-03-01), Bailer et al.
patent: 4238884 (1980-12-01), Walton
patent: 4240204 (1980-12-01), Walton et al.
patent: 4262421 (1981-04-01), Bergler et al.
patent: 4628605 (1986-12-01), Clowers

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