Turntable system with low aggregate resonance
OwnerDavid M. Zoltinventor
Life of this patent
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Abstract
A high fidelity turntable system with low aggregate resonance is disclosed. The turntable system comprises a tone arm assembly and a belt-driven platter assembly joined rigidly by a silent substructure of pure aluminum tubing. This low acoustic mass substructure is internally damped beyond its resonance point and is resiliently suspended from a base plate in a mounting cabinet to isolate the turntable system from substantially all resonant feedback. The acoustic mass of the turntable system and, consequently, the resonance, is further reduced by decoupling the tone arm counterweight from the tone arm assembly by means of additional resilient elements.
Claims14
A high-fidelity turntable system for reproducing a disc having a sound recording thereon whose frequencies lie in an audio spectrum extending from a low frequency range to a high frequency range, said system comprising:
- A. a platter assembly for rotating the disc;
- B. a tone arm assembly whose arm carries a phonograph cartridge having a stylus engageable with the disc to produce signals in accordance with the sound recording;
- and
- C. a low mass substructure supporting said assemblies in a mounting environment and including a main strut of rigid light-weight material bridging the platter assembly and the tone arm assembly and having resonance characteristics lying above said low-frequency range, said strut having a hollow region with internal damping material therein functioning to dissipate vibrations and resonances excited in said strut in the course of turntable operation whereby said strut is acoustically quiescent throughout said spectrum and the signals produced by the stylus are substantially those derived from the sound recording.
Dependencies are inferred from the claim text.