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"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 |
| 7134357 | Rotation limiter Adjustable stops are mounted on a rotating rod, and one pivot arm of a linked pair extends into an interference position such that one stop will strike it. The linkage draws the second arm into interference position if the first arm is displaced from it. Each pivot ... | 11/14/2006 |
| 5430249 | Knob assembly A self-retaining knob assembly (200) includes a housing (150) and a hub (120). The housing (150) has a cavity(157) for receiving a key (135) and a rotation track (160) about the cavity (157). The hub (120) has an integral key (135) and is rotatably mounte... | 07/04/1995 |
| 5346046 | Automation control with improved operator/system interface An endless manual control for use in automation systems, such as automated recording consoles, which controls levels and other parameters of audio, video and other signals, by generating, storing, sending and receiving electronic control signals. The cont... | 09/13/1994 |
| 5271293 | Control unit for a medical apparatus A knob assembly is disclosed for a control unit of a medical apparatus with a front panel. In order to transfer a turning setting movement through the front panel, a feed-through sleeve is rotatably arranged in the front panel and a knob core is movably a... | 12/21/1993 |
| 5190503 | Geared rotary actuator with internal stop mechanism Weight and complexity concerns in geared rotary actuators and stop mechanisms for aircraft or the like may be minimized in the structure including a housing (18) adapted to be fixed to another structure, a rotatable input shaft (14) journalled by the hous... | 03/02/1993 |
| 4557159 | Driving mechanism for slat curtains A driving mechanism for slat curtains, the slats of which can be displaced in a direction transverse to their longitudinal axis and rotated about the longitudinal axis of the slats, comprising a gearing having one drive end and two power take-offs of diff... | 12/10/1985 |
| 4126051 | Channel selector This invention relates to a channel selector suitable for use in a television receiver set. The channel selector comprises a channel selecting shaft which is linked to a variable capacitor shaft through an Oldham coupler. A fine tuning shaft also is linke... | 11/21/1978 |
| 4084675 | Potentiometer having improved operating means A potentiometer has a disc mounted on the shaft. A knob embraces the end of the shaft and is biased away from the disc. The knob is slidable along the shaft into engagement with the disc so that rotation of the knob operates the potentiometer.... | 04/18/1978 |
| 4043206 | Channel selecting shaft mounting arrangement for UHF tuners In arrangement of a channel selecting device used for a UHF tuner of the continuously variable type, a taper clutch is employed for transmitting the rotation of the detented selector shaft to the output drive gear which is secured to the fine tuning shaft... | 08/23/1977 |
| 3990314 | Mechanically limited rotational apparatus Digital indicating means for displaying two series of numbers, one of which commences repeating. The repeating series of numbers is limited in rotation in the embodiment shown between 360° and 720° by a bi-positional pawl cam-follower which interacts wi... | 11/09/1976 |
| 3971258 | Feed mechanism for a machine tool A feed mechanism for a machine tool having an improved stop mechanism which includes a movable stop, a stationary stop, and a rotatable control member. The stationary stop is located on a rotational path of the movable stop which is freely rotatable about... | 07/27/1976 |
