摘要:
The present invention is a system and method for providing access to electronic works over a network. In a preferred embodiment, the present invention offers a user access to electronic copies of works, such as songs, albums, movies, or music videos, over a network. The user responds to the offer by requesting to access to a particular work. Before such a request is granted, the present invention may verify that the user is authorized to access to the work. In one embodiment, the user verifies that they are authorized to access an electronic copy of the work by demonstrating that they possess a physical copy of the work. In another embodiment, the user verifies that they are authorized to access an electronic copy of the work by demonstrating that they ordered or purchased a copy of the work. If a user's authorization is verified, the user may then be provided with access to an electronic copy of the work by such techniques as downloading or streaming.
摘要:
A cryogenic fluid distributor for turret machine tools (e.g., lathes) directs a stream of cryogenic fluid from an external, pressurized cryogen source to a working position of a machine tool to prevent overheating of the tool. Designed for easy retrofitting and synchronizing with multi-tool turret machines, the distributor allows for a “dual-fluid” machining capability combining a cryogenic fluid and a conventional cutting fluid (flowing via a conventional coolant system built into a given machine tool). Made of low thermal-mass, insulating polymer and metallic parts, the distributor utilizes the different thermal contraction coefficients of the parts to establish cryogenic sealing connections, which eliminates undesired turret plate cooling and assures rapid cryogen flow start-up.
摘要:
An apparatus, system, and method for digital-to-analog (converter) control are provided. A DAC includes a first resistor ladder including a plurality of first electrical taps into different portions of the first resistor ladder, first and second pass gate trees coupled to receive outputs from the first electrical taps, first and second buffers coupled to receive outputs from the first and second pass gate trees, respectively, a second resistor ladder coupled to receive and be biased by outputs of the first and second buffers, the second resistor ladder including a plurality of second electrical taps into different portions of the second resistor ladder, and third, fourth, and fifth pass gate trees coupled to receive outputs from the second electrical taps.
摘要:
The present invention is directed to a golf ball heater comprising a rectangular container, the interior of which is outfitted with at least one heating element and rails for holding golf balls. One end of the container includes a sliding door for retrieving a heated golf ball. On one side of the container, a control box is outfitted with circuitry to cooperatively work with sensors in the container for purposes of selectively activating the heating element(s) according to whether or not the sliding door is open or shut and whether or not the temperature inside the container is within the optimal temperature range.
摘要:
A flute positioner is provided for positioning a fastener in a tool barrel, and includes a body, a throughbore extending through the body, and at least one holding member extending into the throughbore. One or more extensions may extend radially outward from the body.
摘要:
The present invention provides a backing for a coated abrasive article, wherein the backing includes a tough, heat resistant, thermoplastic binder material, and an effective amount of a fibrous reinforcing material distributed throughout the thermoplastic binder material. The tough, heat resistant, thermoplastic binder material and the fibrous reinforcing material together form a hardened composition that will not substantially deform or disintegrate during use.
摘要:
A laser stand for supporting a laser leveling device during construction involving metal studs and leg tracks provides a planar shelf including a first end and a second end, at least one first leg depending from the first end, at least one second leg depending from the second end, and a magnet enclosure mounted to the second leg and including at least one magnet for supporting the leveling device while attached to the metal stud. The shelf is configured for pivotably accommodating the leveling device and the stand is configured for supporting the leveling device when placed over the leg track on a substrate or attached to the metal stud.