Precision drive system for independently driven coaxial shafts,

Details Precision drive system for independently driven coaxial shafts, Precision drive system for independently driven coaxial shafts,

1993-11-08

1996-04-09

LaBalle, Clayton E.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 67R, 310114, 57100, H02K 1600, H02K 720, D01H 1300

Patent

active

055064604

ABSTRACT:
To reduce the moment of inertia and eliminate variations in speed of two xial, driven shafts, in which an outer shaft (8) surrounds a central spindle (2), which is particularly important for coiling filament material used in electric lamps, the motors are formed as essentially identical permanent-magnet rotor motors, in which permanent magnets are securely affixed to the central spindle and the surrounding shaft (8), respectively, the stators of which are retained in a common housing (6). The outer shaft carries a supply reel (3) for the filament to be coiled, whereas the inner shaft carries a winding head (7) and a reciprocating deflection roller arrangement for winding the filaments. A typical speed of operation is 1.5 seconds to wind a filament and 0.2 second pause between sequential filaments. Such filaments can be used, for example, in a general-service 60 W lamp. Preferably, the shafts are so arranged that the radial dimension of the inner diameters of the permanent-magnet rotors on the spindle (2) as well as on the surrounding hollow shaft (8) which carries the filament supply reel (3) are the same, thus at least approximately equalizing an already low rotary moment of inertia of the two shafts and motors.

REFERENCES:
patent: 1983896 (1934-12-01), Bottcher
patent: 3152960 (1964-10-01), Alfred
patent: 3968390 (1976-07-01), Yasuda et al.
patent: 4521707 (1985-06-01), Baker
patent: 4654577 (1987-03-01), Howard
patent: 4749898 (1988-06-01), Suzuki et al.
patent: 5111647 (1992-05-01), Gabalda
patent: 5231819 (1993-08-01), Stahlecker et al.
patent: 5274286 (1993-12-01), Yamamura

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