摘要:
Embodiments of an accessory attachment for a rotary power hand tool are disclosed wherein the hand tool is of the type which has a tool housing with a preferably cylindrical nose portion, a motor having a motor drive shaft with a mounting coupling extending forwardly from the nose portion for receiving a drive shaft, the attachment including a housing having a first end portion configured to be mounted to the tool housing nose portion and an input shaft for coupling to the motor drive shaft, and having an enlarged second end portion oriented at a right angle relative to the first end portion and also having an output shaft coupled to the input shaft at a preferably right angle relative thereto, a rotary cutting wheel mounted to the output shaft and substantially disposed within the enlarged second end portion, excepting an exposed portion of the rotary cutting wheel for engaging a work surface, and a removable cover configured to engage said enlarged second end portion to at least partially enclose said rotary cutting wheel therebetween.
摘要:
Embodiments of an accessory attachment for a rotary power hand tool are disclosed wherein the hand tool is of the type which has a tool housing with a preferably cylindrical nose portion, a motor having a motor drive shaft with a mounting coupling extending forwardly from the nose portion for receiving a drive shaft, the attachment including a housing having a first end portion configured to be mounted to the tool housing nose portion and an input shaft for coupling to the motor drive shaft, and having an enlarged second end portion oriented at a right angle relative to the first end portion and also having an output shaft coupled to the input shaft at a preferably right angle relative thereto, a rotary cutting wheel mounted to the output shaft and substantially disposed within the enlarged second end portion, excepting an exposed portion of the rotary cutting wheel for engaging a work surface, and a removable cover configured to engage said enlarged second end portion to at least partially enclose said rotary cutting wheel therebetween.
摘要:
Embodiments of an accessory attachment for a rotary power hand tool are disclosed wherein the hand tool is of the type which has a tool housing with a preferably cylindrical nose portion, a motor having a motor drive shaft with a mounting coupling extending forwardly from the nose portion for receiving a drive shaft, the attachment comprising a housing having a first end portion configured to be mounted to the tool housing nose portion and an input shaft for coupling to the motor drive shaft, and having an enlarged second end portion oriented at a right angle relative to the first end portion and also having an output shaft coupled to the input shaft at a right angle relative thereto, a rotary cutting wheel mounted to the output shaft and substantially disposed within said enlarged second end portion, excepting an exposed portion of the rotary cutting wheel for engaging a work surface, an adjustable guide foot pivotally connected to the enlarged second end portion and having a front surface configured to abut the work surface, the guide foot being configured to permit the wheel to extend beyond the front surface, where a position of the guide foot limits a depth of cut of the wheel into the work surface.
摘要:
A message interceptor is interposed in a link of a communications signalling network such as an SS7 network. The interceptor separately maintains the link level protocols on the two portions of the link with which it interfaces. Message data is transferred across between the link portions by a transfer circuit of the interceptor. In the course of this transfer, the nature of the data is checked by a selective action control circuit against selection criteria held in a store. If a selection criteria is met, the control circuit acts to suppress or modify the data.
摘要:
In a digital data processing system having a resource which is shared between a plurality of users, an arbitration system comprises a plurality of resource requestors (14 to 16) each associated with a respective user, and a resource grantor (10) to which the requestors are connected in parallel via a set of common lines (11 to 13). Each resource requestor is adapted to apply a request signal on a predetermined first one (11) of the lines when the associated user requests the resource, and the resource grantor is responsive to the presence of a request signal on the first line to subsequently apply a grant signal on a predetermined second one (12) of the lines to grant the resource. Each resource requestor requesting the resource is responsive to the grant signal to apply an accept signal on a predetermined third one (13) of the lines after a delay which is different for each resource requestor and which determines the priority of the user associated with the resource requestor. The first accept signal so applied gives the resource to the associated user and prevents any other resource requestor from applying an accept signal on the third line until the resource is relinquished by the current user.
摘要:
A semiconductor integrated pressure transducer in which a semiconductor substrate incorporates a hermetically sealed system comprising a first chamber communicating with a second chamber via a capillary. The first chamber contains a fluid and has at least one portion of a wall in the form of a deformable membrane separating the atmosphere within the chamber from that external to the sensor. The second chamber contains a compressible gas and has rigid walls. The capillary is partially filled with electrically conducting liquid, and the liquid physically separates the fluid in the first chamber from the gas in the second chamber. The wall of the capillary is electrically conductive at least in two separated regions such that in use, at a predetermined external atmosphere pressure, the electrically conductive liquid makes contact with both electrically conductive regions thereby completing an electrical circuit.
摘要:
Compositions comprising a naphtho [1,2-b]pyran of formula (I): wherein R7 and/or R9 is hydrogen or an amino group provided that R7 and R9 are not both hydrogen, and the other substituents are as defined in the specifcation.
摘要:
In a display system of the type where one or more symbol tables 20 are stored in general purpose storage and include blocks of data forming symbol definitions for each of a set of symbols, and an all points addressable (APA) display buffer 30 is provided which includes on-screen APA storage 32 for data indicative of pels to be displayed on a screen and off-screen APA storage 34 for symbol definitions with buffer control logic 36 for associating symbol definitions in off-screen APA storage with locations in on-screen APA storage such that symbols are displayed at desired locations on the display screen, cache control logic 42 is provided for copying the definition of a symbol for display from the symbol table in general purpose storage to off-screen APA storage if the definition for the selected symbol is not already held in off-screen APA storage, whereby the off-screen APA storage is configured as a cache for holding definitions for selected symbols. A cache table 40 is provided in general purpose storage and comprises an entry for each symbol in the symbol set for pointing to the location in off-screen APA storage, if any, at which the corresponding symbol definition is held, each entry in the cache table also being associated with the location in the symbol table at which the corresponding symbol definition is stored.
摘要:
A curve generator for a display system with an arc generator has for generating an arc (10) of a circle (14) from data defining the locations of two end points P.sub.1 and P.sub.3 and an intermediate point P.sub.2 on the arc. The arc generator has an initializer (40) for calculating the angle subtended between a first vector (21), from a first of the end points, P.sub.1 to the intermediate point P.sub.2, and a second vector (32), from the second of the end points P.sub.3 to the intermediate point P.sub.2, and an arc plotter (44) for defining a succession of further vectors n1 from the first end point P.sub.1 and for calculating, for each further vector, its point of intersection P.sub.n with a counterpart vector 3n, from the second end point P.sub.3, with which it subtends the same angle, whereby a succession of further points P.sub.n are plotted on the circular arc.
摘要:
A photochromic compound has the formula (I) wherein R1 is selected from the group including substituted amino aryl moieties, substituted cyclic amino aryl moieties and substituted N-indolinoaryl or N-tetrahydroquinolino aryl groups, R3 is selected from the group including linear or branched C1-C20 alkyl, linear or branched C2-C20 alkenyl or polyalkenyl, C2-C20 alkynyl or polyalkynyl, aryl, heteroaryl, linear or branched C1-C20 alkyl aryl, linear or branched C1-C20 alkyl-cycloalkyl or -bicycloalkyl or -tricycloalkyl or substituted -cycloalkyl or -bicycloalkyl or -tricycloalkyl, linear or branched C1-C20 haloalkyl or perhaloalkyl, linear or branched C1-C20 alkoxyalkyl or peralkoxyalkyl, linear or branched C1-C20 alkylthioalkyl or peralkylthioalkyl, linear or branched C1-C20 amino alkyl or peraminoalkyl, C3-C20 cycloalkyl or substituted cycloalkyl, C4-C20 bicycloalkyl or substituted bicycloalkyl, C6-C20 tricycloalkyl or substituted tricycloalkl or linear or branched C1-C20 hydroxyalkyl or perhydroxyalkyl; R4 and R5 which may be the same or different are R3 or R4 and R5 are conjoined to form a spiro linked C3-C20 cyclic system or substituted cyclic system; and wherein R2 and R6 are each selected from R3 or hydrogen, halogen, nitro, nitroso, amino, acetamido, C2-C10 N-alkylamido, alkoxycarbonyl, nitrile, carboxy, hydroxy, aryloxy, C1-C10 alkoxy, a heteroatom which is O or N or S or P which in turn can be bonded either singly or multiply to carbon, oxygen, sulphur or nitrogen, C1-C5 alkoxy or alkylthio or aryl or aryloxy or multiples thereof.