170,795 research outputs found
Windmill at Frank C. Williams Homestead, Custer County
No full text35 mm slide, windmill in front of the houseDrawer info: Custer- Fall River; Frank C. Williams HMSTD CU-BN Custer Co.Kodachrome Film CU-BN-12 Frank C. Williams HMSTD Windmill RJ 2 Aug 89F0
Complex windmill transformation producing new purely magnetic fluids
Get PDFMinimal complex windmill transformations of G2IB(ii) spacetimes (admitting a two-dimensional Abelian group of motions of the so-called Wainwright B(ii) class) are defined and the compatibility with a purely magnetic Weyl tensor is investigated. It is shown that the transformed spacetimes cannot be perfect fluids or purely magnetic Einstein spaces. We then determine which purely magnetic perfect fluids (PMpfs) can be windmill-transformed into purely magnetic anisotropic fluids (PMafs). Assuming separation of variables, complete integration produces two, algebraically general, G2I-B(ii) PMpfs: a solution with zero 4-acceleration vector and spatial energy–density gradient, previously found by the authors, and a new solution in terms of Kummer's functions, where these vectors are aligned and non-zero. The associated windmill PMafs are rotating but non-expanding. Finally, an attempt to relate the spacetimes to each other by a simple procedure leads to a G2I-B(ii) one-parameter PMaf generalization of the previously found metric
Windmill
No full textPatent for a windmill that makes it possible to convert the force of the wind into electrical or mechanical energy. This windmill has a governor that makes positioning adjustments when the windmill reaches an unsafe velocity
Windmill Attachment
No full textPatent for a windmill attachment that allows the windmill to be operated either by wind or hand power without needing to disconnect the sucker rod from the windmill
Windmill
No full textPatent for a windmill that rotates on a vertical and horizontal axis. The blades are mounted to stop in order to prevent damage to the windmill should pressure occur
Windmill.
No full textPatent for an improved windmill which allows for the conversion of "a rotating motion into a reciprocatory motion" (line 15-16) which allows the windmill to be "manufactured and sold at a comparatively low rate" (line 41-43)
Windmill-Regulator
No full textPatent for a windmill regulator, specifically windmill breaks "to be used in connection with a windmill placed upon a tower in the usual manner and having the controlling-wire depending therefrom to be drawn upon for stopping the pumping mechanism and to be released for allowing it to resume its operation" (lines 22-28), including illustrations
- …
