34results about How to "Small length" patented technology

A withstand voltage testing device for underground cable laying comprises a cable roller used for winding a cable, a roller frame and a swing frame used for preventing uneven winding of the cable. Thecable roller is connected with a winding motor through a speed reducer, and the swing frame is connected with a driving motor through a crank sliding block mechanism. The crank sliding block mechanism is connected with a test ring, the test ring is connected with one test terminal of a pressurization test device, and the other test terminal of the pressurization test device is connected with a wire in the cable; an annular magnet is adsorbed at each of the two ends of the test ring, and iron sand is adsorbed on the annular magnets; and the cable penetrates through the test ring and the innerrings of the annular magnets and is in contact with the iron sand. The device is low in cost, small in occupied area, convenient to test, convenient to lay and construct and high in reliability, and an electric leakage point can be quickly found.

A preform for producing plastic containers, more particularly plastic bottles, in a stretch blow moulding process is described, said preform having an essentially elongated preform body (2), one longitudinal end of which has a closed design. At the opposite longitudinal end thereof, the preform body adjoins a neck portion (3) provided with a pouring lip (4), on the outer wall (5) of which neck portion (3) attachment means (6) for form-fit fixing of a closure part fitted with corresponding engagement means are formed. At the transition (15) from the preform body (2) to the neck portion (3), the preform (1), which has no support ring, has a flange (8) that is annularly circumferential, at least in sections, said flange protruding radially beyond an outer wall (7) of the preform body (2). In a region between the flange (8) and the attachment means (6), a circumferential annular groove (9) is formed on the neck portion (3). The annular groove (9) is delimited by the flange (8) and in the direction of the attachment means by an outer shoulder, which extends transversely from a base of the annular groove (9) to the outer wall (7) of the neck portion (3). On an inner wall (11) of the neck portion (3), the transverse outer shoulder (10) forms an inner shoulder (12) that is annularly circumferential, at least in sections, and extends, as seen in the direction of the preform body (2), axially above the annular groove (9) and transitions into an inner wall (13) of the preform body (2) in a manner essentially free of under-cuts.

An imaging optical system includes a subtelescope array, with at least two subtelescopes, each having a single entrance pupil and an exit light beam. Each subtelescope has an optical pointing axis, and the pointing axes for the subtelescopes are parallel. An imager forms an image from the exit light beams at an image surface, where there is a sensor such as a focal plane array. Preferably, a phase shifter array includes a phase shifter for each of the subtelescopes. The phase shifter array receives the exit light beam of each of the subtelescopes and has a capability to adjust the phase of at least one of the exit light beams. The imager receives the phase-shifted exit light beams.

The invention provides roadway advanced supporting supports capable of assisting machinery to move. The roadway advanced supporting supports capable of assisting the machinery to move solve the problems that repeated supporting, complex operation and low working efficiency in the prior art for a floppy coal top roadway and a long-distance advanced supporting roadway. The roadway advanced supporting supports capable of assisting the machinery to move comprise advanced supporting supports which are composed of top beams, bases, and hydraulic upright columns which are connected between the top beams and the bases in a hinge joint mode and an auxiliary moving mechanism. The roadway advanced supporting supports capable of assisting the machinery to move are characterized in that the lower portions of the two hydraulic upright columns which are connected on one base in a hinge joint mode are fixed together through a fastening support, the lateral end of each top beam is connected with a top protective plate in a hinge joint mode through a telescope hydraulic cylinder, the two advanced supporting supports are a set in parallel in a transverse mode, a plurality of sets of advanced supporting supports are longitudinally continuously arranged along a roadway, and therefore supporting to a top plate is formed; and moving support mechanical arms are arranged between a set of two advanced supporting supports to be moved, are matched with a transport cart, and move each advanced supporting support along the roadway in a longitudinal sequence. The roadway advanced supporting supports capable of assisting the machinery to move are reasonable in structure and design, stable in supporting, convenient to operate, safe to use, and capable of reducing the effect of advanced supporting operation to working face coal mining production.