(Updated 09/15/06, click here for latest update)
I bought this instrument at the weekly Oregon State University surplus sale. The tag said it was a drafting instrument, but a search of the web showed that this was false.
If you have any information about this instrument, please email me. I will update this page with any information that comes my way.
What I have Found So Far...
Continostat Pictures (new pages of pictures as well)
I found 9 pages that reference the instrument, or Otto Gottschalk:
This page contains the following information:
As far as his own personal research work was concerned, it is unfortunate that, save for his thesis for the degree of Master of Engineering, little was published. His work seems to fall into two correlated spheres, the first being the analytical study of statically indeterminate structures; the second sphere was that known today by the high-sounding title, "Experimental Stress Analysis".
The advantages of model analysis were early foreseen by Miller, who was working here at the same time that Beggs in Princeton and Gottschalk in Buenos Ayres were developing the small-displacement-celluloid and large-displacement-spline models respectively. This was in the early 1920's.
Miller's main contribution would have been in the spline type of model very simply held by pins, but Gottschalk, with whom he was corresponding, suddenly produced the "Continostat", which consisted of splines held in elaborate, patented type of supports. Being forestalled was a disappointment to Miller, none-the-less because it is a not uncommon happening among research workers.
The analysis of indeterminate structures by use of Gottschalk's continostat (references the location of a dissertation in the MIT library system)
This page links to a description of the dissertation:
Author Eeman, John.
Title The analysis of indeterminate structures by use of Gottschalk’s continostat / by John Eeman.
Availability All items
Location Institute Archives - Noncirculating Collection 3 | THESIS Thesis C.E. 1928 M.S.
Description 77, xxiii leaves : ill. ; 30 cm.
Format Book BK Thesis
Note Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Sanitary Engineering, 1928. Thesis Supervisor Supervised by Hale Sutherland.
Bibliography Includes bibliographical references (leaves 76-77).
Clearly this dissertation would go a long way towards figuring out what and how the instrument is used, but given that I am just a guy living in rural Oregon, I doubt that I will be able to lay hands upon it any time soon.
Modeling and Experimental Techniques, Second Edition Harry G. Harris
Drexel University, Philadelphia, Pennsylvania, USA Gajanan Sabnis Consultant,
Silver Spring, Maryland, USA.
The book references the continostat, as evidenced by the short quote here:
The Gottschalk (1926) continostat is an improvement on this technique. However, large deformations must be imposed on the model, which causes other kinds of ...The continostat and Gottschalk are not found in the book's index. I have emailed Professor Harris, and hope he can shed some light on the instrument.
Here are pictures of the Continostat and some descriptions, click on the picture to launch a larger version in a new browser window
Also see pictures of parts here, and the uses here:
|Gottschalk's Continostat in the case.|
Detail of three of the swivel arms that ride along the central dovetailed beam.
The dovetail beam is 33-3/8" long (850 mm) with a 60 degree dovetail. The holes are a 13mm counterbore with a 3mm through hole. 1.567" (39.8 almost 40mm) wide.
The bar is marked #504 on the back, so presumably more than one was made.
|Side view of one of the arms.|
A bunch of weights or clamps? Notice the engraving on the beam, "Continostat Gottschalk (Pat)"
Update: definitely clamps for the shims.
|Shim clamps? shims, things, thumbtack objects that fit in holes at either end of the beam. Roll of thread?|
|Rolling clamp arm thing, also case. Used for sideways deformation of the splines.|
|Stacks of shims, all numbered and of different lengths.|
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