655results about "Sewing-machine elements" patented technology

A turbofan engine includes in serial flow communication a first fan, second fan, multistage compressor, combustor, first turbine, second turbine, and third turbine. The first turbine is joined to the compressor by a first shaft. The second turbine is joined to the second fan by a second shaft. And, the third turbine is joined to the first fan by a third shaft. First, second, and third cooling circuits are joined to different stages of the compressor for cooling the forward and aft sides and center bore of the first turbine with different pressure air.

A rotary blade rotating hub mounted rotating assembly vibration control system including a first imbalance mass concentration rotor, a second imbalance mass concentration rotor, a third imbalance mass concentration rotor, and a fourth imbalance mass concentration rotor. The first imbalance mass concentration rotor has a first imbalance mass concentration rotor center axis rotation centered on the rotating assembly center rotation axis. The second imbalance mass concentration rotor has a second imbalance mass concentration rotor center axis rotation centered on the rotating assembly center rotation axis. The third imbalance mass concentration rotor has a third imbalance mass concentration rotor center axis rotation centered on the rotating assembly center rotation axis. The fourth imbalance mass concentration rotor has a fourth imbalance mass concentration rotor center axis rotation centered on the rotating assembly center rotation axis. The first and second imbalance mass concentration rotors are driven at a first rotation speed greater than the rotating assembly operational rotation frequency while controlling the rotational position of the first imbalance mass concentration and the second imbalance mass concentration to produce a first rotating net force vector to inhibit a first vibration frequency. The third and fourth imbalance mass concentration rotors are driven at a second rotation speed greater than the rotating assembly operational rotation frequency while controlling the rotational position of the third imbalance mass concentration and the fourth imbalance mass concentration to produce a second rotating net force vector to inhibit a second vibration frequency.

The invention relates to a sewing machine, in particular to a sewing machine with a dust collection device. The sewing machine comprises a fan, an air suction pipeline and a dust collecting bag. A suction opening of the air suction pipeline is formed below a needle plate, the other end of the air suction pipeline is connected with the fan, and an air outlet of the fan is connected with the dust collecting bag. Due to the fact that the air suction pipeline is arranged below a bottom plate of the sewing machine, dust generated in the sewing process can be effectively removed and prevented from accumulating on various movable parts, and the probability that the sewing machine breaks down is reduced. A dust blowing mode is changed into a dust suction mode, so that pollution caused by the dust to workshop environment is reduced, and air quality in a workshop is guaranteed.

A woven preform used to reinforce a composite structure which includes a central portion having a plurality of interwoven layers. The preform also includes first and second end portions having a plurality of independent woven layers that are integrally woven with the plurality of interwoven layers in the central portion and which extend along the entire length the preform. Interspersed between the plurality of independent woven layers in the first and second end portions are bias plies. The first and second end portions can have through thickness reinforcements comprising reinforcement fibers that traverse through the independent woven layers and the bias plies, locking them together.

A quilting machine (10, 100, 200, 300, 400, 500, 600) is provided with a printing station (20, 125, 225, 325, 425, 525, 611, 626, 631) and a quilting station (44, 127, 227, 327, 427, 527, 627, 632), either on the same or a different production line. Ticking is preprinted with a plurality of different patterns, organized and coordinated by the computer so that a print head can scan the material and print different patterns of different panels (32). Identifying data (40) for matching the panels of a mattress product can be provided in data files and codes can be printed on the fabric. Panels can be matched and assembled into products based on the codes, and quilting, cutting, slitting and other operations can be controlled by printed codes and other data. The quilting and combining of the panels for assembly of a mattress product can be carried out manually or automatically using the data.

A fixture extension device that can support a ceiling fixture at varying heights in relation to the floor is described. The fixture extension device contains a telescoping shaft which enables raising and lowering ceiling fixtures such as fans or chandeliers.

Reversible sweatshirt has a pair of contiguous configurations, each of which may have distinct coloration and distinct embroidery and a secure pocket slot, the application of such embroidery is facilitated through a secure pocket slot having a secure interior pocket pouch, accessible from one or more of the contiguous configurations, for safely securing items and for facilitating the embroidery process of both contiguous configurations. A wearer may select which side of the reversible sweatshirt to wars outside and / or inside, to expose the secure pocket slot and display the distinct coloration and distinct embroidery of the exposed configuration.