Acoustic isolation timing belt pulley for drafting plotters

Details Acoustic isolation timing belt pulley for drafting plotters Acoustic isolation timing belt pulley for drafting plotters

1987-02-26

1989-02-21

Goldberg, E. A.

Recorders

Record receivers and/or driving means therefor

Web

346 11, 346134, 181207, 181208, 181209, 464180, G01D 1524

Patent

active

048069531

ABSTRACT:
Acoustic noises are suppressed in a large format drafting plotter (10) utilizing a paper drive motor (22) mechanically coupled to a paper drive shaft (20) by a geared timing belt (26) from the motor to a pulley (24) on the drive shaft by suitably modifying the pulley. The pulley is modified by enlarging the drive shaft hole (38) in the center thereof so as to provide slip-mounting of the pulley on the drive shaft. A winged clamp (30) is provided, mounted on the pulley, and having a central portion (34) having an opening (36) therethrough for engaging a portion of the drive shaft and a tightening screw (40) for securing the winged clamp to the drive shaft. The winged clamp also has two opposed extensions (42), which are each maintained between a pair of bosses (44) on the outside surface (24a) of the pulley, and isolated therefrom by a pair of isolator pads (32) comprising a compliant material. The isolator pads serve to reduce the resonant amplification of objectionable acoustic noise by the spring-mass system (the drive shaft and the drive roller (16)) by absorbing oscillation energy in the compliant material.

REFERENCES:
patent: 4067184 (1978-01-01), Johnson, Jr.
patent: 4384298 (1983-05-01), Labarre et al.
Gontarek et al., "Noise Reducing Coupling", IBM Tech. Bulletin, vol. 24, No. 1A, 6/81.
Gontarek et al., "Acoustic Isolation Mounting", IBM Tech. Discl. Bulletin, vol. 24, No. 5, 10/81.

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