摘要:
A guard is provided for a take-up shaft of an open-end yarn spinning machine. The shaft rotates about a first axis and cooperates with a cot (a small rubber wheel) which is rotatable about a second axis parallel to the first axis. The guard comprises a tubular body member, preferably circular in cross-section, having a central axis and first and second ends spaced from each other along the central axis. A slot is formed in the body, and the body surrounds the shaft. The body is concentric with the shaft and the slot is disposed beneath the shaft. A cut-out is formed adjacent, but spaced from, the first end of the shaft, and the cot operatively engages the shaft through the cut-out. The slot and cut-out preferably interconnect. A mounting bracket is joined to the body member at the second end of the body member preferably comprises a Y-shaped bracket having a stem integral with the body member and branches with openings for receipt of fasteners. The fasteners are otherwise operative components of the spinning machine, and the fasteners and bracket mount the tubular body member so that it is stationary with respect to the shaft. The body member preferably is formed of a flexible plastic so that the portions thereof defining the slot may be bent away from each other, and the body member easily disposed in a position surrounding the shaft, although it may also be of a rigid metal.
摘要:
An apparatus for treating tissue within a lumen may include a therapeutic or diagnostic instrument. A cleaning device may also be supported by the instrument. The cleaning device has a portion of a cleaning surface positioned proximal to the distal end of the cleaning device.
摘要:
It has been discovered that using n-butylmethyldimethoxysilane (BMDS) as an external electron donor for succinate-containing Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties. The catalyst systems of the invention provide for controlled chain defects/defect distribution and thus a regulated microtacticity along with broadened molecular weight distribution.
摘要:
It has been discovered that using n-butylmethyldimethoxysilane (BMDS) as an external electron donor for succinate-containing Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties. The catalyst systems of the invention provide for controlled chain defects/defect distribution and thus a regulated microtacticity along with broadened molecular weight distribution.
摘要:
An interactive game board system includes a game board, a plurality of capacitive sensors embedded in the game board, a microprocessor with input channels for the capacitive sensors, computer memory means, software instructions and data for directing an interactive game, one or more playing pieces with electrically an conductive portion, and power supply means. An interactive game board system includes interdigitated sensors. An interactive game board system includes capacitive sensors operating in dynamic sensing mode. An interactive game board system includes means for identifying individual game pieces. A method of providing an interactive game board system includes providing a game board, providing capacitive sensors, providing a microprocessor with input channels for the sensors, providing, computer memory means with software instructions for operating the interactive game system, providing a plurality of game pieces with an electrically conductive portion, detecting the presence or absence of game pieces in the vicinity of the sensors, determining the future direction of game play based upon the detecting step, and providing directive feedback to game players based upon the determining step. A method of providing an interactive game board system includes identifying individual game pieces.
摘要:
It has been discovered that using n-butylmethyldimethoxysilane (BMDS) as an external electron donor for succinate-containing Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties. The catalyst systems of the invention provide for controlled chain defects/defect distribution and thus a regulated microtacticity along with broadened molecular weight distribution.
摘要:
A method of treating a neurological disorder comprises introducing an electrical stimulation lead within a patient's head, locating the stimulation lead within the 4th ventricle of the patient's head, and placing the stimulation lead adjacent the fastigium nucleus of the patient's brain. The method may further comprise stimulating the fastigium nucleus with the stimulation lead to treat the neurological disorder, for example, by increasing the flow of blood within the patient's brain.
摘要:
Methods and devices for blocking orifices and occluding cavities within a patient are provided. The device in one variation comprises first and second tubular members attached to a collapsible sealing element. The device can be placed through an orifice and the collapsible sealing element can be collapsed to seal the orifice. An embolic may be introduced distal to the sealing element to occlude a cavity. The device may incorporate a locking mechanism which can be engaged to lock the sealing element into the collapsed position. The device may incorporate a valve to prevent flow through the tubular members, for example to prevent egress of the embolic from a cavity. The device can be detached to provide a permanent seal of the orifice, and can retain the embolic within the cavity. The device may be used in conjunction with a stent or other retention device to assist the sealing element in maintaining the seal.
摘要:
Apparatus for treating abnormal mucosa in an alimentary tract are provided. The apparatus include an ablation structure configured to be removably coupled to an endoscope and a deflection mechanism adapted to move the ablation structure with respect to the endoscope and toward a tissue surface.