Endless belt power transmission systems or components – Control for variable input to output speed-ratio
Patent
1983-05-19
1985-03-19
Leppink, James A.
Endless belt power transmission systems or components
Control for variable input to output speed-ratio
474 71, 74393, F16H 1100
Patent
active
045056900
ABSTRACT:
Transmission systems in which a driven sprocket is driven by way of a chain by a driving sprocket which is driven by drive means at a constant speed of rotation, are provided with oscillating or reciprocating idler sprockets for superimposing on the constant speed of rotation drive a periodic, cyclic motion changing the speed of rotation of the driven sprocket, which periodic cyclic motion increases the length of the portion of said chain extending between the exit side of said driven sprocket and the entrant side of said driving sprocket while shortening by a corresponding amount the length of the portion of said chain extending between the exit side of said driving member and the entrant side of said driven member during one-half cycle of said cyclic motion and vice versa during the other half cycle of said cyclic motion. Such a transmission system is shown applied to a dual wire-mesh belt compaction modules for the wetout of glass fiber rovings and sheet molding compound paste between thermoplastic polymer films sandwiched between two wire-mesh belts horizontally moving in the same direction and respectively driven by two drum rolls positioned at one end of the compaction system. In this application, the transmission system serves as an arrangement for imparting a velocity-variable motion to the wire-mesh belt driven by one of said drum rolls, to produce a shearing type of action between said belts.
REFERENCES:
patent: 1601865 (1926-10-01), Lewellen
patent: 1869662 (1932-08-01), Burkart
patent: 1892067 (1932-12-01), McMillan
patent: 2212348 (1940-08-01), Ludington
patent: 3166947 (1965-01-01), Hendershot
patent: 3529483 (1970-09-01), Warnock
patent: 3906810 (1975-09-01), Glendening
patent: 4292856 (1981-10-01), Hamilton
Bui Thuy M.
Leppink James A.
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