Patent Model - Signal-Call for Telephone-Lines

Maker and role
Francis Richmond (b.1851, d.1907), Patentee
Production date
Feb 28 1882
See full details

Object detail

Wood, iron, steel, copper, cloth wrapped wire
4 5/8 x 6 1/4 x 11 5/8" (11.7 x 15.9 x 29.5cm)
The object of Richmond's invention "is to call any particular station on any telephone line or circuit without calling any other station on the same or any other circuit of the same system..." (Patent Number 254,155)
Object number
Currently on display?


My shortlist

Object type

Explore other objects by color

Public comments

Be the first to comment on this object record.

Google reCaptchaThis site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.