Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • 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 (AREA)
• Electromagnetism (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=20306472

Family Applications (1)

Country Status (3)

• 0
  • BE BE462212D patent/BE462212A/xx unknown
• 1926
  • 1926-02-10 CH CH118017D patent/CH118017A/de unknown
• 1945
  • 1945-10-26 CH CH261801D patent/CH261801A/fr unknown
  • 1945-12-28 GB GB35121/45A patent/GB624171A/en not_active Expired

Also Published As

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