Patentdatenbank   Großbritannien  

Patent:GB318150

Patent:	GB 318150
Titel:	Toy slide rule
Datum:	26.06.1930
Ort:
Land:	Großbritannien
Person:	Fernand, Joseph Bourgeois (P)
Firma:
Links im Rechnerlexikon:	Rechenschieber, Lehrmittel
Schlagworte:
Link zum Patentamt: (ohne Garantie)	GB318150

"Adding and subtracting apparatus. - A device for use by children consists of a slide displaceable relatively to a guide. Upon the guide are ten equal dimensions numbered from 1 to 10, and upon the slide are ten corresponding equal divisions numbered from 10 to 1, the arrangement being such that any division on the slide can be brought opposite to any division on the guide. At the rear of the guide is an aperture through which can be seen a scale inscribed on the rear of the slide, this scale-being such that it indicates the sum of each pair of figures opposite each other on the upper part of the device. The numbers in the divisions may be accompanied by representations of various objects." (aus der Patentschrift)

• DATUM: 26.06.1930
• TITEL: Toy slide rule
• PERSON: FERNAND JOSEPH BOURGEOIS