摘要:
A transfer tail forming apparatus for weft feeders fed to a weaving machine, wherein a tail end of a feeder now in use and a leading end of a preliminary feeder are connected together using a knotter. The tail end and the leading end are automatically positioned and held in a predetermined position by a positioning apparatus, and the yarn ends are connected together by the knotter to form a transfer tail. Further, by the provision of a stand-by apparatus the transfer tail is held in a predetermined posture, and when the whole quantity of the weft on the feeder now in use has been consumed, the leading end of the preliminary feeder can be introduced into the weaving machine in a continuous manner. Moreover, when the supply of weft from the feeder now in use is discontinued, the introduction of the leading end from the preliminary feeder is made possible by the stand-by apparatus. Additionally, by combining with the apparatus a conveyance cassette having a yarn end fixing member at the time of conveyance of a feeder to a feeder stand, the leading end and tail end of the feeder can be held automatically for the above positioning apparatus.
摘要:
Multiple-color air jet looms successively insert different kinds of weft threads into warp sheds to weave a fabric of desired construction. The different weft threads are subjected to different resistances to their being drawn through a main nozzle and are carried on air jets under different conditions, so that the weft threads will be inserted unstably at different speeds. With the arrangement of the invention, selected weft threads for insertion are carried, one at a time, through the warp shed under respective different weft carrying forces suited for the weft threads. The different weft carrying forces may be produced by varying pressures at which air is ejected, intervals of time during which air is ejected under pressure, or the manner in which subnozzles are positioned along the warp shed. There is provided a control means for changing the air pressures and ejection time intervals in synchronism with operation of the air jet loom.
摘要:
Flexible printed boards are introduced to a camera body respectively through a plurality of slit holes formed in a rotating barrel at different positions in the direction of an optical axis. The outer dimension of the lens barrel is kept from increasing.
摘要:
A lens apparatus is disclosed which allows a reduced overall length when it is put into a barrel body while a high magnification of taken images is realized. The lens apparatus includes a first holding member which holds a first lens unit; a second holding member which holds a second lens unit disposed closer to an image plane side than the first lens unit; a first cam member which has a first cam portion driving the first holding member in an optical axis direction; a second cam member which has a second cam portion driving the first cam member in the optical axis direction; and a third cam member which includes a third cam portion driving the second holding member in the optical axis direction.
摘要:
There is provided a lens barrel on which a flexible substrate having mounted thereon an image pickup element for photoelectrically converting an optical image imaged by a photo-taking lens is mounted, having a plurality of lens barrel members disposed movable forward and backward in the direction of an optical axis, and moving the photo-taking lens between a stored position which is the image pickup element side in the direction of the optical axis and a photographing position which is an object side in the direction of the optical axis, and an image pickup element supporting unit for supporting the image pickup element, and having a notched portion so that at least one of the plurality of lens barrel members may face the flexible substrate.
摘要:
A lens apparatus is disclosed which can achieve, an optical adjustment with a simple structure having a small number of parts. The lens apparatus has a lens unit, a lens holding member which holds the lens unit, a first holding member which holds the lens holding member, and a second holding member which holds the first holding member.
摘要:
A weft transfer control system for an air jet loom having a main nozzle and a plurality of weft supply members. The system includes a detecting circuit for detecting the release of a weft that is transferred from one weft supply member to another weft supply member and for generating a transfer signal. A control box includes dials for presetting plural initial supply pressures for the main nozzle, corresponding to each of the weft supply members. The control box receives the transfer signal and generates a control signal corresponding to the preset initial supply pressure for the corresponding weft supply member. An electromagnetic air pressure valve and a regulator adjust the supply pressure to the main nozzle to correspond to the preset initial supply pressure on the basis of the control signal. A delay circuit delays the operation of the electromagnetic air pressure valve for a predetermined time to delay the adjustment to the preset initial supply pressure, so that the change in the supply pressure coincides with the ejection of the transfer tail of the weft from the main nozzle.
摘要:
A zoom lens barrel capable of attaining a higher photographing magnification by reducing spacing between lens groups in a telephoto state. A first lens group barrel holds a first lens group. A second lens group holding member supported by a third cam barrel holds a second lens group. A spring member urges the holding member toward the first lens group. Cam followers are formed at an opposite end of the holding member from the first lens group. Cam grooves for engagement with the cam followers are formed on the third cam barrel. When the holding member is urged by the spring member in a non-shooting region, each cam groove is brought into contact via one cam surface with the associated cam follower. In a shooting region, the cam groove is brought into contact with the cam follower via two cam surfaces.
摘要:
A zoom lens barrel capable of attaining a higher photographing magnification by reducing spacing between lens groups in a telephoto state. A first lens group barrel holds a first lens group. A second lens group holding member supported by a third cam barrel holds a second lens group. A spring member urges the holding member toward the first lens group. Cam followers are formed at an opposite end of the holding member from the first lens group. Cam grooves for engagement with the cam followers are formed on the third cam barrel. When the holding member is urged by the spring member in a non-shooting region, each cam groove is brought into contact via one cam surface with the associated cam follower. In a shooting region, the cam groove is brought into contact with the cam follower via two cam surfaces.
摘要:
In an alternate weaving system on a fluid-jet type loom, two or main nozzles for different yarns and combined in a vertically juxtaposed arrangement are driven for common vertical reciprocation in parallel to a vertical plane including the air guide or reed array of the loom for sequential and alternate registration at an operational position corresponding to the entrance to a weft transportation channel formed by the array, thereby allowing an as close as possible location of the main nozzles to the entrance to that fluid ejected by the main nozzles should be wholly caught into the channel for stable weft insertion purposes.