Abstract: A bidirectional trimmer head assembly and the method of configuring the trimmer head assembly. The trimmer head assembly has a housing that attaches to a string trimmer machine. A spool is provided inside the housing. The spool rotates about an axis of rotation. The spool can move longitudinally along the axis of rotation between a first position and a second position. A ratcheting mechanism is provided between the trimmer head housing and the spool. When the spool is in one position, the ratcheting mechanism enables the spool to continuously rotate about the axis of rotation in the direction of or in the direction opposite that in which the trimmer head assembly spins to allow the spool to be fed out or dispensed regardless of the direction of rotation of the trimmer housing. The ratchet mechanism in a second postion prevents the spool from rotating relative to the housing.

Abstract: A trimmer head assembly has a housing that defines an interior. A spool is provided. The spool can be inserted into the interior of the housing either in an upright configuration or in a flipped inverted orientation. A spring is provided in the housing that biases the spool into a first position within the housing. A ratcheting mechanism exists between the spool and the housing that enables the spool to rotate only in a first direction when in said first position. The direction of rotation permitted by the ratcheting mechanism depends upon the orientation of the spool within the housing. In this manner, a single trimmer head assembly can be made to operate on a clockwise trimmer or a counterclockwise trimmer merely by inverting the spool.

Abstract: The disclosure relates to crystalline forms of 2-[4-(7-ethyl-5H-pyrrolo[2,3-b]pyrazin-6-yl)-phenyl]-propan-2-ol, characterized by physico-chemical data described herein.

Abstract: Apparatus for bonding rubber O-Rings from cord stock, rubber extrusions and extruded tubing materials, consists of heated die-sets, holding fixtures, electronic module, assembly device, spring clamping and pneumatic clamping arrangement. The combined heated die-set and holding fixture are two separable heat conductive blocks having a common interface. Apertures are located across the interface having diameters or matching shapes of extrusions, these apertures are slightly less than the cord or extrusion dimensions, the rubber is axially mated in the open heated aperture, and will stay unlovable when the clamping device is closed. The electronic module controls both a heating and timing device for proper control of maintaining a constant temperature and accurate timing cycle.

Abstract: Apparatus for bonding rubber O-Rings from cord stock, rubber extrusions and extruded tubing materials, consists of heated die-sets, holding fixtures, electronic module, assembly device, spring clamping and pneumatic clamping arrangement. The combined heated die-set and holding fixture are two separable heat conductive blocks having a common interface. Apertures are located across the interface having diameters or matching shapes of extrusions, these apertures are slightly less than the cord or extrusion dimensions, the rubber is axially mated in the open heated aperture, and will stay unlovable when the clamping device is closed. The electronic module controls both a heating and timing device for proper control of maintaining a constant temperature and accurate timing cycle.

Abstract: A trimmer head assembly and the method of configuring the trimmer head assembly. The trimmer head assembly has a housing that attaches to a string trimmer machine. A spool is provided inside the housing. The spool rotates about an axis of rotation. The spool can move longitudinally along the axis of rotation between a first position and a second position. A ratcheting mechanism is provided between the trimmer head housing and the spool. When the spool is in its first position, the ratcheting mechanism enables the spool to continuously rotate about the axis of rotation in the direction opposite that in which the trimmer head assembly spins. The ratchet mechanism also prevents the spool from rotating within the housing in the same direction in which the trimmer head is spinning.

Abstract: An improved process for the preparation of N-amino nitrogen heterocyclic compounds is disclosed and claimed. In an embodiment of this invention, a compound of the formula (VI) is prepared starting from the corresponding indole derivative by way of N-amination and subsequently forming an hydrazone by the reaction with a keto compound in a single step. Further reduction of the hydrazone and subsequent coupling with a pyridine compound affords the compound of formula VI or a suitable salt thereof.

Abstract: An air seal is illustrated as used in a gas turbine engine. The seal includes at least a seal substrate, a relatively dense, erosion resistant ceramic layer applied over the bond coat, and an abradable ceramic layer applied in a local area over the dense ceramic layer. The abradable ceramic interacts with a component moving relative to the seal, such as a turbine blade that moves relative to the seal, and cooperates with the moving component to provide sealing and thermal insulation.

Abstract: A lighting structure for intensely illuminating a narrow linear region. A light source emits light into an end of a hollow, elongate light guide. A longitudinal slit light-emitting aperture extends through an external wall of the light guide. A lens is mounted in the aperture. The lens bears a plurality of prisms which extend substantially perpendicular to the slit, on an inwardly directed face of the lens. The lens may be formed of a film material. A mechanism is provided to maintain the lens flat. A diffuser mounted outwardly of the lens bears a plurality of thin striations extending transversely, relative to the longitudinal slit aperture.

Abstract: The apparatus includes a generally circular table having a fence about its periphery, and is provided with a conveyor for feeding quantities of container crowns onto the table. The table is rotated so that the container crowns are moved outwardly against the fence and fed centrifugally into a twist chute for receiving the crowns. The apparatus is provided with first and second curved channels coupled for conveying containers out of the twist chutes, the second curved channel merging together with the first channel at a point along their respective paths, with the path length of the first channel being substantially longer than that of the second channel between the twist tube, twist chute and the merging point. The apparatus includes the escapement assembly, the speed of which is controlled and is operated at the merging point for controlling the rate of movement of container crowns out of the first and second channels.

Abstract: A solar prominence adapter comprises a tubular housing having a first end adapted for connection with the eyepiece holder of a conventional reflecting or refracting telescope and the other end for connection with a conventional eyepiece. The housing includes an occulting disc positioned in a first plane for eclipsing or occulting an image of the sun present in that plane. A focusing system is provided for focusing the occulted image onto a second focal plane in which the image may be viewed by means of the conventional eyepiece. Supported in the housing is a prism for attenuating the solar radiation which is directed into the housing by the telescope when the adapter and telescope are connected. The housing may further include a filter for filtering out all but a narrow bandwidth of solar radiation and an adjustable diaphragm for varying the intensity of the observed image.

Abstract: A hopper is constructed to control the rapid, uniform and constant flow of disk-like objects, more particularly bottle crowns. The hopper employs a reservoir and means for feeding the disk-like objects to the reservoir. An electric eye responsive to the level of disk-like objects in the reservoir is connected to the feeding means to maintain a predetermined level of the objects in the reservoir. A conveyor is positioned to adjoin the reservoir to remove and deliver the disk-like objects at a uniform rate to the point of use of the hoppered objects.If the disk-like objects are asymmetrical, an orienting device is provided between the feeding means and the reservoir to orient the objects as they are delivered to the reservoir.

Abstract: In an astronomical telescope assembly which can be used in a non-observatory type building, a refracting telescope is mounted for rotation about its optical axis with the optical axis parallel to the axis of earth's rotation and with the eyepiece end of the telescope higher than the objective end, which extends to the outside of the building through an opening in a wall of the building. A reflector unit carried by the objective end of the telescope has a reflecting surface which is pivotable about an axis perpendicular to the optical axis for directing light into the telescope, the reflecting surface being manually positionable about its axis by control means provided at the eyepiece end of the telescope. The telescope proper may be of known construction or may employ spars upon which various optical elements can be releasably mounted for forming different optical systems. Automatic solar tracking apparatus is provided.