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289 results about "PHYSICAL FORCES" patented technology

Method and apparatus for streaming force values to a force feedback device

A method and apparatus for shaping force signals for a force feedback device. A source wave is provided and is defined by a set of control parameters (including a steady state magnitude, a frequency value and a duration value) and modified by a set of impulse parameters (including an impulse magnitude, and a settle time representing a time required for the impulse magnitude to change to the steady-state magnitude). Optionally, application parameters specifying a direction of force signal and trigger parameters specifying activating buttons can also be provided for the source wave. Using a host processor or a local processor, the force signal is formed from the source wave and the sets of control parameters and impulse parameters, where the force signal includes an impulse signal followed by a continual steady-state signal after an expiration of the settle time. A feel sensation is generated to a user of the force feedback device as physical forces produced by actuators on the force feedback device in response to the force signal. The steady-state magnitude value is lower than a magnitude value of a non-impulse-shaped force signal required to create a corresponding feel sensation having a similar apparent sensation to the user.
Owner:IMMERSION CORPORATION

Overflow downdrawn glass forming method and apparatus

One embodiment of the present invention is an improved sheet glass forming apparatus. In another embodiment, a precise thermal control system redistributes the flow of molten glass at the weirs to counteract the degradation of the sheet forming apparatus which inevitably occurs during manufacturing. In yet another embodiment, the invention introduces a counteracting force to the stresses on the trough in a manner such that the thermal creep which inevitably occurs has a minimum impact on the glass flow characteristics of the forming trough. Another embodiment creates a variable external cross-section which provides hydraulic stresses that are in opposition to the surface tension and body force stresses and thus, reduces the influence of surface tension and body forces. In an alternative embodiment, the glass is preferentially cooled across its width to create forming stresses during solidification, which ensures that the glass sheet drawn is inherently flat. In an additional embodiment, the internal pressure is adjusted in each of the major components of the forming apparatus such that the pressure difference across any leakage path to the forming zone is essentially zero. Therefore, air leakage in the apparatus is minimized even though the cracks and openings exist during initial operation and develop during manufacturing.
Owner:CORNING INC

Test apparatus for coal and gas burst

The invention discloses an experimental device for the coal and gas burst, comprising a coal sample chamber and an atmospheric pressure loading device, wherein the coal sample chamber is provided with coal and gas exhaust nozzles having control valves, the atmospheric pressure loading device is provided with an atmospheric pressure loading channel that communicates with the inside of the coal sample chamber having a diaphragm in front of the control valves, and a cavity between the diaphragm and the control valves is a balancing cavity connected with a balanced atmospheric pressure loading device; the device also comprises a pressure acquisition device in the coal sample chamber and a camera arranged outside the coal sample chamber and the part of the coal sample chamber opposite to the camera is transparent. The invention is capable of simulating the pressure of gas and physical force of coal, achieving the instant fast pressure release to be closer to the actual coal and gas burst and the damage process of coal, and observing and recording the simulation to provide the theoretical foundation of forecasting and preventing the coal and gas burst; during the use, the grain diameterof powdered coal, pressure while the formation and charging pressure can be regulated to observe the grain diameter parameters of different powdered coals and the experimental result under different pressures, and the device is flexible in use.
Owner:CHONGQING INST OF COAL SCI RES INST +1
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