Universal pulsato unit

Details Universal pulsato unit Universal pulsato unit

1976-07-01

1981-03-03

Miska, Vit W.

Music

Instruments

84 125, 181143, 181171, G10H 102, G10H 104, G10K 700, G10K 1300

Patent

active

042533686

ABSTRACT:
An improved mounting for an acoustic pulsato rotor for suppression of spurious sounds utilizes a spring bias for axial thrust between the shaft ends and bearing cups. In one form, a plurality of thin spider legs extend from a rotor mounting panel in surrounding relationship to the rotor to provide the spring characteristics while being acoustically transparent to the sound radiation pattern that sweeps past. The spider legs have a quick fit, anti-noise twist lock connection to a central hub. Improved rubber-like grommets provide anti-shock and anti-noise mounting for the shaft. Improved rubber-like grommets in cooperation with a two part motor mounting provide anti-shock and anti-noise motor mounting without sacrifice of simple belt tension adjustment capability. A light weight back enclosure for the speaker acquires sound isolation characteristics of a sturdy structure by imposing stress on the enclosure.

REFERENCES:
patent: 1445508 (1923-02-01), Hahnemann et al.
patent: 1788105 (1931-01-01), High
patent: 3157247 (1964-11-01), Ishimura
patent: 3245284 (1966-01-01), Leslie
patent: 3315760 (1967-04-01), Schwendener
patent: 3902015 (1975-08-01), Edwards et al.

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