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