Patent Model - Improvement in Speaking-Tubes
Maker and role
Andrew Rankin, Patentee
Production date
Jul 01 1873
See full details
Object detail
Media/Materials
Brass
Measurements
15 x 16 1/4 x 2 1/2" (38.1 x 41.3 x 6.4cm)
Description
Rankin's patent "relates to the construction of mouth-pieces for speaking-tubes; and consists of a mouth-piece in which the lid is recessed, and has annular bearings or shoulders for thin metal disks, which, with the lid, constitute the whistle." (Patent Number 140,539)
Collection
Object number
2015.14.1592
Currently on display?
Maker
Public comments
Be the first to comment on this object record.