Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1984-11-15
1986-08-19
Goldberg, Howard N.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
B29D 1700
Patent
active
046061053
ABSTRACT:
A method of banjo sub-assembly construction is disclosed. The metal tone ring and mating wooden rim are fabricated and assembly with an interference fit so as to provide a tight and permanent interface therebetween and thereby enhance the quality and volume of sound from the banjo instrument. A tone ring expander apparatus is used to expand the tone ring to permit the wooden rim to be easily inserted in the tone ring.
REFERENCES:
patent: 443159 (1890-12-01), Bradbury
patent: 1739006 (1929-12-01), Lange
patent: 3871263 (1975-03-01), Telesco
patent: 4226159 (1980-10-01), Lowe
patent: 4483234 (1984-11-01), Snavely
Echols P. W.
Goldberg Howard N.
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