Title: Process of photoetching a metal comb

Abstract: A musical movement which comprises, primarily, a metal comb produced by a chemical machining process and, secondarily, a drum in the shape of a frustum of a stepped comb. The comb is advantageously provided with means whereby it can be fastened to a movement base without employing bolts or the like and the drum steps advantageously have projections, for co-operation with the comb teeth, that do not extend further radially than do the immediately neighboring drum steps of larger size.

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Other info:

Inventors: Clark, William Frederick
Baxendale, Philip Noel
Peters, Michael Noel

Application Number: 627034
Filing Date: 1975-10-30
Publication_date: 1978-01-31
Assignee:
Primary Class(es): 430/320 84/96, 216/48, 216/108, 430/269, 430/323, 984/204, 984/DIG1
Other Classes:
US Patent Ref:

474370	May, 1892	Corthell	84/96.
519816	May, 1894	Langfelder	84/95.
2346444	Apr, 1944	Machlin et al.	84/95.
2876670	Mar, 1959	Duncan	84/94.
3156563	Nov, 1964	Harrison et al.	96/36.
3159486	Dec, 1964	Henderson	96/36.
3620736	Nov, 1971	Tarkington	96/36.
3674488	Jul, 1972	Dodd et al.	96/36.

Other Refs:
Primary Examiner: Kimlin, Edward C.
Assistant Examiner:
Attorney: Haseltine, Lake & Waters