Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of BE462212ApublicationCriticalpatent/BE462212A/xx
B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
B61H7/00—Brakes with braking members co-operating with the track
B61H7/02—Scotch blocks, skids, or like track-engaging shoes
B61H7/04—Scotch blocks, skids, or like track-engaging shoes attached to railway vehicles
B61H7/06—Skids
B61H7/08—Skids electromagnetically operated
B61H7/086—Suspensions therefor
G—PHYSICS
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B27/00—Photographic printing apparatus
G03B27/02—Exposure apparatus for contact printing
G03B27/04—Copying apparatus without a relative movement between the original and the light source during exposure, e.g. printing frame or printing box
G03B27/06—Copying apparatus without a relative movement between the original and the light source during exposure, e.g. printing frame or printing box for automatic repeated copying of the same original
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
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Electromagnetism
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Engineering & Computer Science
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Mechanical Engineering
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Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated
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