Push button chord derivation and apparatus

Push button chord derivation and apparatus

United States Patent 2964986

US Patent References:
Electrical musical instrument
- - 2357191

Electrical musical instrument
- - 2645968

Distributor and method for making the same
- - 2649513

Neutral relay
- - 2702841

Multiple switch
- - 2740004

Inventors:

Johnson, Philip C.

Publication Date:

12/20/1960

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Assignee:

BALDWIN PIANO COMPANY

Primary Class:

84/715

Other Classes:

200/5A, 84/DIG.015, 84/443, 200/533, 984/345, 84/720, 984/348, 84/DIG.022

International Classes:

G10H1/34; G10H1/38; H01H1/40; H01H1/12