Whistle

Measuring – testing – or signalling instruments – Security or signal instrument or casing – Aural – i.e. – audible

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D03092747

REFERENCES:
patent: 186718 (1877-01-01), Einig
patent: D247785 (1978-04-01), Ehrick
patent: D293216 (1987-12-01), Fernandez
patent: D293657 (1988-01-01), Petersson
patent: D301513 (1989-06-01), Wright
patent: 431007 (1890-06-01), Quinlan et al.
patent: 468793 (1892-02-01), Curran
patent: 936253 (1909-10-01), Parizek
patent: 1002493 (1911-09-01), Burt
patent: 2936547 (1960-05-01), Weems
P. S. Olt Company, Sep. 1972, G.-7, Hawk Call.
Baldwin Train Whistle Advertising Brochure.
Model Engineer Magazine, pp. 606-608, Jun. 1969.
Photographs of Whistle on Old Steam Locomotive (marked pp. 1,2,3,4,5).

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