Patent:GB191210855

Patent:	GB 191210855
Titel:	Improvements in Date Calculating Devices
Datum:	28.11.1912
Ort:
Land:	Großbritannien
Person:	Kerr David Smith
Firma:
Links im Rechnerlexikon:	Datumsrechner
Schlagworte:
Link zum Patentamt: (ohne Garantie)	GB191210855

Aus der Patentschrift GB191210855

"Adding and subtracting apparatus. For calculating dates, a wooden or other base has two grooves and is divided on back, front, and ends into 365 parts numbered from unity in each direction. In each groove slides a strip also divided into 365 parts and inscribed one, 13, with the month and days of the month, the other, 14, with the days of the week. " (aus der Patentschrift)

DATUM: 28.11.1912
TITEL: Improvements in Date Calculating Devices.
PERSON: KERR DAVID SMITH CA

Rechnerlexikon

Patent:GB191210855