摘要:
A clip for a self-ligating orthodontic bracket assembly has a lifting element between the labial surface of the bracket and the labial portion of the clip that can be rotated to provide a range of adjustability in lifting the labial portion of the clip with respect to the bracket. The lifting element thereby controls the range of motion of the tongue of the clip in its closed position. This limits the forces applied by the clip to an archwire held in the archwire slot of the bracket, and also allows an archwire to slide freely in the slot. A threaded shaft or camming mechanism can be employed as the lifting element.
摘要:
A robotic system for forming features in orthodontic aligners includes a control system, a platen for three-dimensional positioning of the aligner, a heating station for selectively heating a small region of the aligner, and a thermoforming station for manipulating the heated region to form a desired feature in the aligner. Optionally, a laser cutting and trimming station can also be included to trim excess material from the aligner or to cut features into the aligner. The control system can include a processor with CAD software to enable a user to design features for aligners.
摘要:
A rail joint assembly joining the ends of two rails together includes a pair of joint bars. Each joint bar having one side configured to the rail web side. Mechanical fasteners mount the joint bars to the web sides. Pairs of load bearing keys are embedded in web counter bores at predetermined depths into the webs and embedded in adjacent joint bar counter bores at predetermined depths into the joint bars. The pairs of keys in the webs and the joint bars transfer railway loads through the joint and substantially strengthen the rail joint assembly.
摘要:
A device is disclosed for attracting predetermined species of animals based on fractal geometry and the animal's own color perception. The device includes a planar object having at least two opposed faces and a shape unique to the fractal dimension of the predetermined animal species which the device is designed to attract. A light emitting surface is disposed on at least one face of the planar object. The surface is covered with light generating elements adapted to emit a light color based on color perception of the predetermined specific species, which color wavelength and brilliance is unnatural in normal surroundings relative to that species' own color perception. Finally, a mechanism is provided for mounting the object and enabling oscillatory-like movement in the object about an axis thereof.
摘要:
A hydrolasing system for use in storage tanks includes a remotely-operated water lance having an elongated main body and an axle assembly that folds parallel to the main body so that it can be deployed and retrieved through a small-diameter riser of storage tank. After deployment, the system can be remotely operated within the tank to remove hardened salt cake.
摘要:
A switch proxy comprising a controller, a translations database and a switching fabric are connected to a trunk group between a remote terminal and its controlling local switching system. The switch proxy monitors control signals to and from the switching system on the trunk. In the event of loss of control signals from the host switching system, the switch proxy intercepts requests for service, etc. from a calling telephone connected to the remote terminal and performs a look up in the translation database. If the call can be completed without the controlling switching system the call is looped back to the remote terminal. The translation database is maintained by a switch proxy management system that receives change orders from the local exchange carrier. The switch proxy management system forwards relevant changes to the switch proxy's translation database in the field.
摘要:
A folding feed for a mobile satellite system having a reflector antenna, a feed, and a feed arm. The feed arm carries the feed at its distal end. A pivot is provided between the distal end and the feed. A feed stop block, connected at the distal end, has first and second surfaces. When the mobile satellite system stows the antenna, the feed pivots to abut the first surface against the feed to hold the feed at a first set angle. When said mobile satellite system deploys the antenna, the feed pivots to abut the second surface against the feed to hold the feed at the second set angle. A spring connected between the feed arm and feed holds the second surface against the feed. The first angle is greater than the second angle to provide a low profile to the stowed antenna.