Ainsworth's Manual
Engineering
Robert A. Neault ('38) Collection
Steven A. Walton
1911
Text
English
Methods-Time Measurement Application Data card
efficiency
ergonomics
The data on this card was a mature version of the "MTM" or "Methods-Time Measurement" movement pioneered by Herold Bright Maynard, John Lenhard Schwab and Gustave James Stegemerten in the early twentieth century. These men built on the fundamental scientific management work of Frank B. Gilbreth (1868–1924). In his building contracting work he developed measurement and time-motion studies to optimize the efficiency of work movements, both to make the job faster and simultaneously require less energy from the worker, as well as to also to maximize profits for the company. <br /><br />For the modern manifestation of this, see <a href="https://mtm.org/en/">MTM (METHODS-TIME MEASUREMENT) e.V.</a> association, from Hamburg, Germany
Steven A. Walton
Methods Engineering Council, Pittsburgh, PA
1950
Physical Object
English
Protractor-Square
drafting
Robert A. Neault ('38) Collection
A white plastic protractor connected to a right angle square, allowing for dimension and angle drawing. The window below the protractor is has slightly non-parallel long edges that diverge at about 2-3˚. <a href="https://patents.google.com/patent/USD93979S/en">Design patent no. 93,979</a>—meaning it was ornamental only, not claiming any conceptual innovation—for this instrument was filed on March 27, 1934 and issued to by Robert S. Grant of Providence, RI on Dec. 4 that same year. (Grant would also receive d design patent in 1949 for an ornamental circular drawing insrtument featuring protractor, various geometric shapes and curves, parallel line slots, and a line of holes that allowed the user to draw a limited number of circles/arcs; <a href="https://patents.google.com/patent/USD156504S/en">Design pat. no. 156,540</a>).
Steven A. Walton
after late 1934
Physical Object
English
Ames Lettering Instrument 1760
drafting
Robert A. Neault ('38) Collection
Steven A. Walton
1930s?
Physical Object
English
Dietzgen "Champion" Drawing Set
drafting
Robert A. Neault ('38) collection
Steven A. Walton
after 1938
Physical Object
K&E Log Log Duplex Slide Rule
Robert A. Neault ('38) Collection
Steven A. Walton
1930s
Physical Object
English
K&E Stadia Slide Rule
Robert A. Neault ('38) Collection
Steven A. Walton
btw. 1900 and 1938
Physical Object
English
Level
Robert A. Neault ('38) Collection
Steven A. Walton
1930s
Physical Object
English
Type 2 Amsler Polar Planimeter
Robert A. Neault Collection
Planimeters in general are used to calculate the area enclosed inside an arbitrary shape on a plane. Polar planimeter's, 103 types, perform a mechanical integration as a stylus is traced around the perimeter of the shape in question. Because the shape does not need to be regular, these devices were often the only way to calculate the area accurately with any rapidity whatsoever.
This model is of the "Amsler" type, developed by Swiss mathematician Jacob Amsler in 1854, and is known as a Type 2 Amsler (the diagnostic feature being the arc at the elbow).
Steven A. Walton
1930s
Physical Object
English
Drawing Set
Robert A. Neault Collection
Steven A. Walton
1930s
Physical Object