Cutlery – Cutting tools – Saw
Patent
1979-12-14
1981-04-21
Peters, Jimmy C.
Cutlery
Cutting tools
Saw
74 50, B27B 1900
Patent
active
042624207
ABSTRACT:
A crosshead for a scotch yoke mechanism is formed from a generally rectangular blank of sheet steel provided with a generally oval, straight sided opening extending generally transversely medially thereof and a pair of generally circular openings centered and spaced apart from each of the oval opening straight sides, the blank being formed, as on a four slide forming machine generally around two generally parallel lines each being generally extensions of the oval opening straight sides to provide top and bottom generally parallel panels defining a closed end guide track having parallel sides and positioning the generally circular openings in the top and bottom panels and in line to be threaded on a generally cylindrical tubular saw bar of a sabre saw, the blank being further formed to tubular configuration of generally rectangular cross-section by two further parallel bends closing the crosshead on a fourth side on the side of the saw bar opposite the guide track opening. The crosshead is povitally mounted on the saw bar, a pair of low mass snap or clinch rings disposed in annular grooves on the saw bar on opposite sides of the crosshead adjacent the top and bottom panels.
REFERENCES:
patent: 2970484 (1961-02-01), Springer
patent: 4206657 (1980-06-01), Palm
Bell Edward L.
Lackenbach Elliot A.
Peters Jimmy C.
Smith Robert E.
The Singer Company
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