摘要:
A guard for a power transmission shaft such as a tractor pto shaft 18,20 comprises a flexible convoluted tubing 24 with end couplings 26 which together totally enclose the rotating parts. The tubing 24 can extend and retract axially to suit a variety of shaft lengths, and can flex transversely to accommodate turning of the tractor/implement combination. A tube 34 journalled on bearings 36, or equivalent bearing means, prevents damage to the tubing 24 by the shaft 18,20.
摘要:
An omnidirectional quad-loop antenna has four open circular wire loops, each being the same length as the wavelength of a wireless signal. The loops are joined at their tops and each lies in a distinct plane that is rotated 45 degrees with respect to each adjoining wire loop. The bottom terminal ends of the loops are configured to connect to the outer conductor of a coaxial cable. A helical wire coil may be connected at one end to the loops at the connection point, or insulated from the loops, and the other end is configured to connect to the inner conductor of the cable. With the antenna and cable connected to a device, the wireless signal is much stronger, in any direction, than without. The compact antenna fits within the volume of a sphere with a circumference corresponding to the wavelength.
摘要:
A grocery inventory tracking assembly includes a scanning unit has a scanner and an electronic memory. The scanner is electrically coupled to the electronic memory. The scanner may scan bar codes on grocery items. The electronic memory may store the bar codes thereby facilitating the electronic memory to track inventory of the grocery items. A mount is provided and the mount may be removably coupled to a support surface. The mount frictionally engages the scanning unit. Thus, the scanning unit may be retained on the support surface.
摘要:
A disclosed example method involves determining a first quality of service parameter associated with a failed logical circuit, and a second quality of service parameter associated with a logical failover circuit. When the first quality of service parameter is equal to or less than the second quality of service parameter, data from the failed logical circuit is rerouted to the logical failover circuit without requiring authorization from a customer to communicate the data at the second quality of service parameter. When the second quality of service parameter is a lower level of quality than the first quality of service parameter, the customer is prompted for authorization to communicate the data via the logical failover circuit at the second quality of service parameter. When authorization is received, the data is rerouted to the logical failover circuit. When authorization is denied, the data is not rerouted to the logical failover circuit.
摘要:
A method and system are provided for automatically rerouting logical circuit data from a physical circuit failure in a data network. When a failure in a logical circuit is detected, a label or services name associated with the logical circuit is automatically associated with a logical circuit identifier utilized for identifying the logical circuit in the 10 data network. Once the logical circuit is associated with the logical circuit identifier, the logical circuit data may be automatically rerouted to a “failover network,” thereby minimizing lost data until the failure in the logical circuit is resolved. The logical failover circuit may be an already existing logical circuit provisioned over a dedicated backup physical circuit in the data network.
摘要:
A method and system are provided for provisioning logical circuits for intermittent use in a data network. A customer order requesting the use of a logical circuit for communicating data for a predetermined time period is received in the data network. A logical circuit is then provisioned in the data network prior to the start of the predetermined time period for communicating the customer data. Once the predetermined time period has elapsed, the provisioned logical circuit is deleted from the data network.
摘要:
A disclosed example method to identify a failure in a logical circuit involves receiving non-requested trap data from a plurality of switches forming a logical circuit. The logical circuit spans first, second, and third logical networks. The example method also involves polling first and second switches of the logical circuit exclusive of others of the plurality of switches of the logical circuit. The first switch forms a first network-to-network interface between the first logical network and the second logical network. The second switch forms a second network-to-network interface between the second logical network and the third logical network. The first and second switches are selected for polling based on the trap data indicating a problem at the first and second switches. The example method also involves identifying a failure of the logical circuit without manual intervention based on the polling.
摘要:
A method and system are provided for prioritized rerouting of logical circuit data in a data network. A logical circuit failure is identified in the data network. Following the identification of the logical circuit failure, a quality of service parameter for the communication of data in the failed logical circuit is determined. The quality of service parameter may include a traffic descriptor indicating the quality of the data communicated in the logical circuit. Then, a logical failover circuit comprising an alternate communication path for communicating the data in the failed logical circuit is identified. Next, a quality of service parameter for the communication of data in the logical failover circuit is determined. If the quality of service parameter for the failed logical circuit is equal to the quality of service parameter for the logical failover circuit, then the data from the failed logical circuit is rerouted to the logical failover circuit. In this manner, the quality of the data in the logical failover circuit is communicated at the same level of service provisioned for the failed logical circuit.
摘要:
A treadmill power generator (10) comprises an upwardly inclined treadmill (2) having an entry end (16c) and a feed end (16b). A belt constitutes the treadmill and rotates around rollers (8,12). Side barriers (16a) prevent an animal on the belt from exiting the treadmill sideways. A releasable brake holds the belt in a fixed position. A detector (22) detects the head of an animal entering the feed end (16b) and releases the brake, whereby the animal must continue to walk in order for its head to remain at the feed end. Its walking drives the belt and rotates the roller against the resistance of a generator (50) to generate electricity, or other farm equipment mechanical or hydraulic load.
摘要:
A racing wheelchair is disclosed. The racing wheelchair may have a pair of rear wheels and a steerable single front wheel. The rear wheels may be independently driven by a lever, through a derailer and a chain, such that pushing one of the two levers will move one of the wheels but not the other. The front wheel is steerable by twist grips located at the removed end of the levers. Brake assemblies and shifter assemblies of the derailers are located adjacent the twist grip, and may be rigidly mounted to the push lever or mounted to the twist grip to rotate therewith