摘要:
Base current is supplied from a base driving circuit to bases of paired inverter transistors through a transistor, and an inverter circuit oscillates at a rated output. When the operation of an electric discharge lamp becomes abnormal, an IC-ed control circuit is rendered operative responsive to output of an abnormality detecting circuit to turn the transistor ON and a transistor OFF, and the operation of inverter circuit is thus stopped. A capacitor in an auxiliary power source is charged by output of the base driving circuit and the control circuit is driven responsive to output of auxiliary power source when the inverter circuit is left inoperative.
摘要:
An apparatus for operating a gaseous discharge lamp comprises a D.C. power source, a transistor inverter which is connected to the D.C. power source through a switch, provided with at least one inverter transistor and generates an output having a prescribed frequency, and a discharge lamp which is energized by an output from the transistor inverter and having a pair of electrodes heated by part of the output. The apparatus further comprises base current control means which holds the base current of the inverter transistor at a level lower than a first level during a prescribed length of time after the close of the switch, and holds the base current at the first level after the prescribed length of time. The discharge lamp has its electrodes preheated, but does not display discharge when the base current has a level lower than the first level, and commences discharge when the base current reaches the first level and thereafter continues discharge.
摘要:
An example window display device on a window-system type computer system displays a main window and a sub-window. The window display device includes a sub-window moving mechanism for moving the sub-window in accordance with movement of the main window so that the sub-window may always keep a specified relative position with respect to the main window on a display screen.
摘要:
An output transformer for an inverter driven by a pulsating voltage obtained through the full wave rectification of a low frequency alternating current voltage is provided with an auxiliary winding, and a high frequency voltage obtained from the auxiliary winding is rectified to obtain a voltage for charging a capacitor. The voltage across the capacitor is used as an auxiliary voltage together with the pulsating voltage for driving the inverter. The circuit for charging the capacitor includes a current limiting inductor having first and second coil sections, through which the charging current flows alternately in opposite directions depending upon the polarity of the high frequency voltage.
摘要:
A level wound coil (LWC) having a plurality of coil layers each of which has a pipe wound in alignment winding and in traverse winding. The LWC has a shift section where the pipe is shifted from the m-th coil layer to the (m+1)-th coil layer on a bottom surface thereof when the LWC is disposed on a mount surface. The shift section has the k-th shift section on inner layer side and the (k+1)-th shift section on outer layer side, where a start point of the (k+1)-th shift section does not transit, relative to a start point of the k-th shift section, to a direction reverse to a winding direction of the pipe. A length of the shift section that does not transit to the reverse direction is controlled.
摘要:
An agent interface device provides information suited for user preferences on the basis of a usage history. In an example implementation, the agent interface device controls the display and action of the agent. A user preference database stores user preferences. An information providing engine provides information to the user according to information in the preference database, and a timer sets a time for the information providing engine to provide information to the user.
摘要:
An improved small electronic apparatus such as an electronic organizer is disclosed. In the apparatus, data to be kept stored is prevented from being erroneously deleted. This apparatus comprises: a memory, a plurality of input keys; a temporary deletion element for, when a first predetermined key operation is performed, setting desired data which is stored in the memory into a temporary deletion state; a deletion element for, when a second predetermined key operation is performed, deleting the data which has been set into the temporary deletion state from the memory; and a release element for, when a third predetermined key operation is performed, releasing the temporary deletion state of the data which has been set into the temporary deletion state.
摘要:
A level wound coil (LWC) having a plurality of coil layers each of which has a pipe wound in alignment winding and in traverse winding. The LWC has a shift section where the pipe is shifted from the m-th coil layer to the (m+1)-th coil layer on a bottom surface thereof when the LWC is disposed on a mount surface. The shift section has the k-th shift section on inner layer side and the (k+1)-th shift section on outer layer side, where a start point of the (k+1)-th shift section does not transit, relative to a start point of the k-th shift section, to a winding direction of the pipe.
摘要:
A heat transfer pipe 21 with grooved inner surface is provided with a pipe body 22 having a pipe axis line ◯ as a center axis line, a plurality of first fins 23 each having a fin height Hf, formed by providing a plurality of spiral grooves 200 at an inner surface of the pipe body 22 along the pipe axis line ◯ and at least a second fin 24 having a fin height hf, provided at a groove bottom of at least one of the spiral groove 200. The fin height hf and a torsion angle α of the second fin 24 are determined respectively to satisfy the following conditions: Hf/15≦hf≦Hf/3 and α=β, when P=W×di×sin β and P≧0.86 wherein a bottom width of the spiral groove 200 is W, a torsion angle of the spiral groove 200 is β, and an inner diameter of the pipe body 22 is di.
摘要:
A level wound coil (LWC) having a plurality of coil layers each of which has a pipe wound in alignment winding and in traverse winding. The LWC has a shift section where the pipe is shifted from the m-th coil layer to the (m+1)-th coil layer on a bottom surface thereof when the LWC is disposed on a mount surface. The shift section has the k-th shift section on inner layer side and the (k+1)-th shift section on outer layer side, where a start point of the (k+1)-th shift section does not transit, relative to a start point of the k-th shift section, to a winding direction of the pipe.