"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 5558565 | Glass pattern cutting device The present invention provides a glass cutting apparatus for cutting glass to a predetermined pattern. The glass cutting apparatus includes a rotatable workpiece holder which is adapted to rotatably hold a glass workpiece and overlaying pattern thereon. A... | 09/24/1996 |
| 4637168 | Spectacle lens edge grinding machine A spectacle lens edge grinding machine either having a support which carries the template abutment and the grinding wheel, and which can be moved toward the fixedly mounted support shaft for the spectacle lens and the template, or a support which carries ... | 01/20/1987 |
| 4612736 | Method and apparatus for bevelling or grooving ophthalmic lenses The peripheral edge of an ophthalmic lens is maintained in contact with a bevelling or grooving wheel while being rotated about an axis of the lens parallel to the axis of the bevelling wheel whereby a bevel or groove is formed in said peripheral edge. Th... | 09/23/1986 |
| 4605049 | Multiple carving machine Multiple wood working machine having a base supporting a work bench having retaining members for the pieces to be worked and for a pattern piece, and an articulated parallelogram work frame carrying working tools for the pieces and a feeler member for the... | 08/12/1986 |
| 4475319 | Process for machining a worm-type workpiece with a worm-type tool A process for dressing a single or multiple-grooved worm or threaded workpiece by a single or multiple-grooved worm or threaded dressing tool includes the turning of the workpiece and tool with the dressing tool in a comb-type contact with the workpiece. ... | 10/09/1984 |
| 4461330 | Portable woodworking power tool A woodworking power tool comprising a base plate having a motor mounted thereon at one end of the base plate. The motor has a motor housing on which a spindle housing is mounted for rotation through an arc of 180°. The spindle housing has a spindle there... | 07/24/1984 |
| 4401699 | Surface processing method A surface processing apparatus and method for painting or otherwise treating variously contoured surfaces. A track includes an elongated pliant beam to which a bending apparatus is attached for the purpose of conforming it to the contour of the surface to... | 08/30/1983 |
| 4356669 | Cam control grinding machine A grinding apparatus for forming and grinding complex curved surfaces such as the peritrochordal bore of rotary a combustion engine, e.g. Wankel engine, having a cam member with a surface corresponding to the surface of the workpiece to be ground, a grind... | 11/02/1982 |
| 4218850 | Cambering devices of roll grinding lathes In a cambering device of a roll grinding lathe of the type wherein a grinding wheel is moved toward and away from the center of a roll by means of a cambering cam while the grinding wheel is moved in the longitudinal direction of the roll, there are provi... | 08/26/1980 |
| 4077302 | Apparatus for machining end housings for slant axis rotary mechanisms An improved apparatus for machining the end walls of slant axis rotary mechanisms of the type having a base, a support pivoted on the base for rotation about a first axis, a shaft journalled on the support for rotation about a second axis nonparallel to t... | 03/07/1978 |
| 4074416 | Mirror and method of making same A mirror, and method of making same, is disclosed. The mirror includes a metallic base material having a low coefficient of thermal expansion, an intermediate layer bonded to the base by a plasma spray process and a reflecting surface overlying the interm... | 02/21/1978 |
| 4051636 | Method and apparatus for grinding turbine and compressor blades to dimension For the purpose of grinding turbine and compressor blades to dimensions, a model blade and work piece are arranged one above the other in a support member which is supported on an air cushion to permit ease and freedom of motion in any direction, the mode... | 10/04/1977 |