Geometrical instruments – Scriber
Patent
1977-07-18
1979-01-23
Phillips, Charles E.
Geometrical instruments
Scriber
B43L 1300
Patent
active
041353030
ABSTRACT:
The invention provides a toy of the type consisting of a box wherein there is a tracing device making it possible to draw forms on a translucent screen previously coated with an opaque pulverulent powder by applying a stiletto on to said screen, a toy wherein the base of said box carries at least two stirrups hinged about bearings, said stirrups co-operating with screws operating the downwards and upwards motions of said stirrups which actuate one of the rods carrying the stiletto so as to move it away from the screen or bring it closer to same, said screws being integral with driving studs arranged on the upper surface of the box.
REFERENCES:
patent: 1512015 (1924-10-01), Butz et al.
patent: 3055113 (1962-09-01), Grandjean
patent: 3331082 (1967-07-01), Sheets
patent: 3333273 (1967-07-01), Kallen et al.
patent: 3360799 (1967-12-01), Polster
Hieken Charles
Jouets Educatifs Universels
Phillips Charles E.
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