Ruler
Little White Schoolhouse Museum
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| Nom de l'objet : | Ruler |
| Type de l'objet : | Slide |
| Catégorie de l'objet : | Tools and Equipment for Communication |
| Sous-catégorie de l'objet : | Data Processing T&E |
| Matériaux : | cardboard wood plastic |
| Numéro d'accession : | M047 |
| Fabricant : | Hughes Owens |
| Nom du marchand : | Unknown |
| Province d'origine : | NS |
| Pays d'origine : | Canada |
| Date de fin de production : | 19640000 Later Than |
| Description : | White rectangular ruler with navy blue markings and letterings. Ruler divided into three lengthwise sections. The centre section slides out. A clear glass square section can slide along length of the ruler. A black cardboard case accompanies the ruler. Top of case has 'Student Slide Rule with the Lifetime Guarantee!' written on case in yellow writing. |
| Commentaires : | Slide rules were used as an early form of calculator. The slide rule has several different logarithmic scales. The centre scales are on a moveable section. This allows scales to be combined for multiplication, subtracted for division. One can calculate quite complex numerical calculations. Some schools also purchased a large demonstration slide rule for teaching. The vast majority of slide rules sold by The Hughes-Owens Company, Limited in Canada were manufactured by Hemmi in Japan. This relationship began almost as soon as Hemmi began making slide rules - the 1914 Hughes-Owens catalogue featured Hemmi slide rules with laminated construction patented by Hemmi in Japan in 1912. Sometime during 1964, Hughes-Owens changed the numbering system to a 7-digit number, with the format 341 3xxx. This rule bears the seven digit number. http://www.sphere.bc.ca/test/ho/hoarc1.html |
| Hauteur : | 1.5 |
| Longueur : | 29 |
| Largeur : | 4 |
| Unité de mesure linéaire : | cm |
| Nombre d'objets : | 1 |
| Nombre de parties composantes : | 1 |
| Étiquette ou poinçon : | Student Slide Rule with the Lifetime Guarantee' on front of box 'Hughes Owens H-O Since 1900 341 3526' on back of box 'Hughes Owens H-O Since 1900' in circle logo on ruler |
| Établissement : |
Little White Schoolhouse Museum
 Facebook-Little White Schoolhouse Museum
|
| Ville de l'établissement : | Truro |
| Province de l'établissement : | NS |
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