摘要:
A filament comprising a polymer blend and specific articles comprising the filament are disclosed. The polymer blend includes an aliphatic nylon and a semiaromatic nylon. The aliphatic nylon is the major component of the blend and semiaromatic nylon is the minor component of the blend. The aliphatic nylon can be Nylon 6, Nylon 66, Nylon 610, Nylon 612, Nylon 12, and mixtures thereof. The semiaromatic nylon can be 6I/6T, 6T/6I, and mixtures thereof. The nylon blend filament provides enhanced mechanical properties such as modulus, ultimate strength, and yield strength with improved processability and reduced diameter variability at a reduced cost.
摘要:
A spool for use in a trimmer head of a rotary trimmer having trimmer line is provided. The spool comprises at least three flanges (60, 61, 62) essentially parallel to each other. A passageway for the trimmer line is located between two of the flanges, the passageway (66) having opposed ends and extending from one side of the spool to an opposite side. The spool includes at least one inclining portion on one of the two flanges (60, 61, 62) about which the passageway (66) is located and at least one opening on the other of the two flanges (60, 61, 62) about which the passageway (66) is located. Each opening is in alignment and essentially contiguous with each inclining portion. The trimmer line may be wound onto the spool from the opposed ends of the passageway (66), between the two flanges (60, 61, 62) about which the passageway is located, up the at least one inclining portion, through the at least one opening, and into a space defined by the flange having the at least one opening and the third flange (62).
摘要:
An antenna protection device includes a pair of opposed contacts, an inner electrode connected to one of the contacts. The outer electrode is separated from the inner electrode by a dielectric layer and connected to the other of the contacts. A bleed-off resistor is connected between the opposed contacts to dissipate any accumulated. Corona rings may be employed around the foregoing components to improve operation of the device.
摘要:
A biconical antenna (20); an entry conic (34) having an entry base (40) opposite an entry vertex (38) and a termination conic (36) having a termination base (74) opposite a termination vertex (72). The entry and termination conics (34,36) share substantially the same axis and the entry vertex (38) is adjacent the termination vertex (72). The transmission line (24) is received by the entry conic (34) and terminated in the termination conic (36). Together, the entry conic (34) and the termination conic (36) phase correct energy emanating from the transmission line (24). Another embodiment of the antenna (100) comprises an entry conic (102) having at least two sub-conics (106A,108A) and a termination conic (104) having at least two sub-conics (106B,108B). Each of the sub-conics having an integer multiple of a half-angle (θ). The biconical antenna (200) may also include a multi-conductor transmission line (204), wherein the biconical antennas (230,240) are arranged in a co-linear relationship. Each of the multi-conductors is coupled to at least one of the plurality of biconical antennas (230,240).