摘要:
Electrical power distribution busway joints include opposing plates of conductive and non-conductive materials for connecting between adjoining busway sections. The non-conductive plates comprise glass-filled epoxy laminate sheets having high thermal conductivity, high electrical resistance and good mechanical strength in the presence of excess moisture.
摘要:
A device for use in planting seeds and bulbs is disclosed which allows planting in untilled soil with a simple prodding-type motion to both make a hole and to plant the seed in the hole. The device is capable of operation on hills or in almost any other type of terrain, and thus greatly reduces the labor needed to plant seeds and bulbs. It may be used with a conveyor system to continuously supply seed to the device to enable rapid, efficient planting of seed.
摘要:
The throat slot, arranged in the needle plate for the passage of the needle, has in the right front portion thereof a groove. It is designed to retain the previously formed thread chain and prevent the formation of the overlock stitch until displaced by the passage of a fabric.
摘要:
A multi-pole mounting base for interfacing a circuit breaker and/or circuit interrupter with an electrical panel is disclosed. The electrical panel has an interior configured to receive remote operated circuit breakers (ROCBs) in signal communication with a communication board internal to the electrical panel, non-ROCBs, and ground fault circuit interrupters (GFCls). The mounting base includes a unitary support platform assemblable to the interior of the electrical panel and having first mounting regions with common structure configured to receive any one of the ROCBs, the non-ROCBs, and the GFCls. The support platform also has second mounting regions configured to receive the communication board. The support platform is configured to assemble adjacent to another support platform in the electrical panel.
摘要:
A circuit breaker configured to be remotely operated is disclosed. The circuit breaker includes a set of main contacts configured to connect between an electrical source and an electrical load, an operating mechanism in operable communication to open and close the main contacts, and a remotely operable drive system configured to open and close the main contacts separate from actuation of the operating mechanism. The drive system includes a motor responsive to first and second control signals, a primary drive responsive to the motor, and an opening spring responsive to the primary drive, the main contacts being responsive to the opening spring. In response to the first control signal, the primary drive moves to charge the opening spring, and in response to the second control signal and the main contacts being closed, the primary drive moves to allow the opening spring to discharge thereby resulting in the main contacts opening independent of the motor.
摘要:
A vehicular truck equipped for road repair work is described, including a repair materials hopper, a front discharge chute and a drive worm conveyor mechanism for transporting road repair material from the hopper through the chute for deposit in a pavement ''''pothole'''' or the like to be repaired, is described. The discharge end of the material chute carries a rake movable up and down, from side-to-side and from front-to-back, through the use of hydraulic piston control mechanism controllable by a single operator in the truck cab, for spreading the deposited material evenly over the pavement defect being repaired. A hydraulically controlled roller, also controlled by the single operator in the cab, is mounted at the rear end of the truck for use in rolling the deposited and raked repair material to complete the road repair operation.