printing key frame
now historical
noun
A typewriter for producing embossed type, designed for use by blind people.
- The device was patented by Pierre Foucault in 1849 and was exhibited in London at the Great Exhibition of 1851..
Origin
Mid 19th century.
- keep the ball rolling
- keep the bastards honest
- keep the field
- keep the peace
- keep the pot boiling
- keep (the) score
- keep the wolf from the door
- keep time
- keep to
- keep to oneself
- keep up (also keep up with)
- keep up appearances
- keep up with
- keep up with the Joneses
- keep watch
- keep wicket
- keep your hair on!
- keep your pecker up
- keep your shirt on
- keepy-up
- keepy-uppy
- keeshond
- keester
- keeve
- kef