摘要:
A method for forming a roller bearing of very small axial dimension and high load-carrying capacity, and applicable also to a large-diameter roller bearing, comprising inserting the rollers into the circumferential guide and rolling track of the outer race and holding the rollers in position by two opposing lateral shoulder-forming spring rings of small thickness which are snap-inserted into corresponding inwardly flared grooves provided in the opposing faces of the bearing outer race. The rings being locked in position by using suitable dies to axially press annular appendices which define the mouth of the annular grooves. Modifications to this method are provided, and the roller bearings obtained in accordance with the invention are described.
摘要:
A modulator for controlling high-speed rotary dobbies of the type which control the dobby main shaft's motion by transmitting power from a drive shaft through pivotable rocker supports rotatably driven by the drive shaft and engaging conjugate cams so that the drive shaft's uniform rotary motion is converted into non-uniform motion of the dobby main shaft. This is caused by the conjugate cams, which cause the rocker supports to pivot. The rocker supports are mounted so as to accommodate this rocking. The two rocker supports are connected to the dobby main shaft by two connecting rods hinged by pins on one of the rocker supports and on an appendix of the main shaft respectively, these connecting rods being disposed antisymmetrically to each other in accordance with a particular geometry.
摘要:
A self-locking demountable pin consisting of a central stay bolt with an internal hexagonal through bore for its tightening by a key and comprising at its two ends two opposite-handed external threads, right handed and left handed respectively, which cooperate with the corresponding threads of two elastic end nuts each provided with an annular flange having a frusto-conical surface and decreasing in thickness in an outward direction, its taper being greater than that of two frusto-conical flares into which the nuts are to be inserted.
摘要:
An overhead travelling crane incorporated into a power gas turbine bay, consisting of a first main load-bearing trolley of length equal to the bay width, which is guided at its ends over the entire length of the bay by two runways fixed to the top of said bay, and a second trolley provided with a winch and slidably supported in a third trolley which is also of length equal to the bay length and is slidably supported by the overlying said first main load-bearing trolley. This latter trolley is provided with cantilever hooking means.
摘要:
A device is provided for incorporation in apparatus for the automatic manufacture of articles from fabric by cutting the fabric into sets of single pieces and then moving the individual pieces of a set to a work station at which the pieces are sewed to each other, which comprises: a movable hollow frame, a flat plate which has a centrally disposed opening and which is adapted to be forced downwardly against the upper surface of a piece of fabric; a connection between the plate and the frame; an elongated oscillatory needle holder supported at its lower end by the frame along an axis of rotation located above the opening in the plate; a needle having a curved sharply tapered lower end and a stem; a connection between the stem and the needle holder at a point above the lower end of the needle holder whereby oscillation of the needle holder will cause the sharply tapered end of the needle to swing through the opening in the plate along an arc; and means are provided for adjusting the location of the arc so that the tapered end of the needle is caused to penetrate the fabric to a predetermined depth.
摘要:
An apparatus for rapidly and simultaneously, coupling and uncoupling loom heald frames, of varying length, to and from their respective drive bell cranks. Each heald frame attaches to more than one head of a flexible tie-rod, which in turn, extends down to adjustment sliders which are connected to the drive bell cranks. During the heald frame coupling and uncoupling from a locking apparatus at the head of the flexible tie-rod, two tilting jaws keep all of the flexible tie-rods in a rigid vertical position.
摘要:
A control system for a plurality of tuck-in selvedge forming devices in a loom having a variable reed beat-up position includes a main shaft, a drive shaft connected to all the tuck-in selvedge forming devices, a modulator driven by the main shaft and having an output shaft which pauses at least once during each revolution of the main shaft, as well as a coupling unit rotatable with the drive shaft and operative to be selectively rotatably coupled to the modulator output shaft so that the drive shaft is driven by the main shaft. The coupling unit includes a ring fixed to the drive shaft and a first cover pivoted to the ring so that a key can enter into the recess of the modulator output shaft to rotatably couple the coupling unit to the modulator output shaft during its pauses. A second lever is biased so as to follow contours of a control cam and prevent the first key from entering the recess of the modulator output shaft. An electromagnet controlled by a logic unit cooperates with the second lever to prevent the second lever from engaging the first lever.
摘要:
A high-speed rotary dobby key mover mechanism having a main crank arm in which two keying levers that have the same arm ratio are mounted for pivotal movement on a cam in opposing positions. The adjacent ends of the keying levers cooperate with a key, while the free other ends of the key levers, which are diametrically opposite about and at the same distance from the axis of the dobby drive shaft for the dobby cooperate alternately with a single control device which is located on only one side of the main crank arm. The control device is regulated, moreover, by a logic unit.
摘要:
A crank lever for loom linkages, comprising a body of high-strength aluminum plate with a central hole and grooves on the inner and outer body faces adjacent the hole. A central annular rotation and thrust-bearing hub of steel surface-hardened by heat treatment is inserted into said hole and locked therein by simple compressive plastic deformation of its outer annular edge facilitated by the grooves.
摘要:
A control device for rotary dobbies in which a key has a transverse groove of width equal to the thickness of a control ring with which it cooperates plus the length of travel undergone by the key in its insertion into or withdrawal from radial grooves in a big end of a main crank arm or in a drive shaft. The control ring has an elliptical shape and is fixed onto a operating lever which, pivoted on a minor axis of an ellipse and retained in its rest position by a V-shaped spring, is made to rock to one side or the other about the axis of symmetry of the spring by a pusher rod. The pusher arm is operated by a cam mechanism and moved by a needle selector controlled by a programmer, to act on one of two valleys provided in a rocking sector on an operating lever symmetrically about an axis of symmetry.