Renseignements généraux

Nº de série

147178

Nº de partie

1

Nombre total de parties

1

Ou

S/O

Brevets

S/O

Description générale

CELLULOID COVERED WOOD CORE WITH METAL END PIECES/ LEATHER CASE WITH FABRIC LINING, cellulose nitrate

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

57,3 cm

Largeur

7,1 cm

Hauteur

2,6 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Mathématiques

Catégorie

Dispositifs à calculer

Sous-catégorie

S/O

Fabricant

Ou

Keuffel Esser

Pays

United States of America

État/province

New York

Ville

New York

Contexte

Pays

Canada

État/province

Québec

Période

1940'S-1970'S

Canada

AN EXAMPLE OF ASLIDE RULE USED BY CANADIAN STUDENTS & PROFESSIONALS. THIS RULE BELONGED TO THE DONOR'S FATHER, DR. ORVILLE J. DENSTEDT, WHO OBTAINED HIS PHD IN BIOCHEMISTRY AT MCGILL UNIVERSITY IN THE 1940'S & SUBSEQUENTLY TAUGHT THAT SUBJECT THERE.

Fonction

A MECHANICAL ANALOG COMPUTING DEVICE USED FOR RAPID CALCULATIONS SUCH AS MULTIPLICATION, DIVISION, SQUARES & SQUARE ROOTS, CUBES & CUBE ROOTS, PROPORTIONS, SINES, COSINES, TANGENTS, SECANTS, COSECANTS ETC.

Technique

AN EXAMPLE OF A POLYPHASE DUPLEX SLIDE RULE OF THE 1940'S. THE DONOR'S FATHER PURCHASED IT DURING THE 1940'S WHILE A UNIVERSITY SCIENCE STUDENT & USED IT UNTIL HE PURCHASED A CALCULATOR IN THE 1970'S. SLIDE RULES SUCH AS THIS WERE MUCH USED BY SCIENTISTS, ENGINEERS, ETC. UNTIL MADE OBSOLETE BY ELECTRONIC CALCULATORS.

Notes sur la région

Inconnu

Détails

Marques

INCISED BLACK LETTERING ON DIFFERENT PARTS OF SLIDE RULE READ 'KEUFFEL & ESSER CO. N.Y.', 'PAT. JUNE 5, '08 DEC. 22 '08', 'MADE IN U.S.A.', 'N4088-5', '147178', 'KEUFFEL & ESSER CO.', 'PATENT 2,086,502'/ BLACK & RED SCALES & NUMBERING

Manque

S/O

Fini

BUFF SLIDE RULE WITH PLATED PARTS, COLOURLESS TRANSPARENT CURSOR/ BROWN LEATHER

Décoration

S/O