Computer History Museum

"Hoffman" is printed on back side of central slider.

Type
Physical Object
Catalogue number
102626622
Slide rule

Wooden slide rule with white paint onto which the scales are printed. Slide is double sided with trigonometric scales on the reverse. Back of the slide rule contains various printed tables and mathematical functions.

Type
Physical Object
Catalogue number
102626623
Beginners slide rule

Object is a small slide rule, missing the cursor.

Type
Physical Object
Catalogue number
102626652
Sun Hemmi bamboo slide rule 5"

Dimesions are with leather open. Object consists of a leather, adder, and stylus.

Type
Physical Object
Catalogue number
102627384
Ve-Po-Ad (Vest Pocket Adder)

<p>Small plastic circular slide rule for forecasting the weather by setting the wind direction and barometer reading then looking up on the printed table (on the back of the instrument) to determine the weather for the next few hours. Comes complete with its original box and instruction booklet.</p>

Type
Physical Object
Catalogue number
102627817
Pocket Forecaster circular slide rule

Three slide rules (more properly called nomograms because, although they have a cursor, they don't actually have a sliding scale) used for aiming howitzer guns. Scales on both sides of each of the three devices for different charges (charges 1,3,4,5,6,7).

Type
Physical Object
Catalogue number
102627818
Special purpose slide rule (nomogram) for 155mm howitzer guns (3 pieces)

Wooden slide rule with white paint on surface - scales printed on the paint. Various tables and mathematical formulas printed on the back.

Type
Physical Object
Catalogue number
102627851
Lawrence slide rule

Elementary circular slide rule mounted on a rectangualr plastic card - an advertising give-away. Instructions for multiplication and division printed on the circular rotating scale. "For Armament Preparedness" printed on front.

Type
Physical Object
Catalogue number
102627852
Circular slide rule

Plastic circular calculator with movable cursor to convert between roods, poles and perches. "St Peters Churchyard, Chester" written on cursor.

Type
Physical Object
Catalogue number
102627853
Clark's Computer - poles or perches (circular table with cursor)

Circular slide rule - many scales on each side.

Type
Physical Object
Catalogue number
102627854
Circular slide rule

Case of drafting tools containing large compass (interchangable points for either pencil or ink), dividers, drawing pen, two small compass (one for ink the other pencil) and small container for pencil leads. There is also a plastic protractor. Two largest instruments stamped with "Riefler" on the yoke for the hinge.

Type
Physical Object
Catalogue number
102627856
Case of drafting tools

<p>The object is a schoty or Russian abacus with 10 beads on each column except 4th. 11 digits</p>

Type
Physical Object
Catalogue number
102630015
Schoty

Large curcular slide rule in leatherette case. Despite the name "binary" it contains no binary scales. A small manual for the instrument is inside the case. Object consists of object, case and instruction manual.

Type
Physical Object
Catalogue number
102630128
The Binary Slide Rule, circular slide rule

Instrument for determining direction heading for a four leg flight, this appears to be homemade.

Type
Physical Object
Catalogue number
102630263
Model air navigation instrument

Compu-Verter slide rule consists of white plastic ruler with movable slide ruler inside. Used to convert 8 bit binary to hexadecimal and EBCDIC symbols and card punch codes. Printed red text includes "Compu-Verter / by / MTY computer products, inc / (301) 770-6980". Yellow stain between #2 and #3 on side including "patent pending no. 943925".

Type
Physical Object
Catalogue number
102630275
Compu-Verter slide rule

Object includes brown leather case, slide rule, and has magnifier attached.

Type
Physical Object
Catalogue number
102630276
SKF minature slide rule

Slide rule consists of white ruler with numbers on both sides and a clear plastic slide with a line down the center. The back of screw on the left side is corroded. Object includes a brown leather case with a ink stain on it.

Type
Physical Object
Catalogue number
102630277
Pickett slide rule

Artifact includes manual.

Type
Physical Object
Catalogue number
102630278
Jeppensen Sanderson slide flight computer

Artifact includes brown leather case.

Type
Physical Object
Catalogue number
102630279
Jeppensen slide flight computer

Jeppensen slide flight computer consists of four plastic wheels and ruler. Printed text on middle of front wheel includes "Jeppesen model CR-2 computer". Front of computer indicates text for calculating air speed, temperature, and altitude. The back indicates text for calculating crosswinds. Smudge on ruler left of center hole.

Type
Physical Object
Catalogue number
102630280
Jeppensen slide flight computer