摘要:
A gateway device in an IP communications system can be controlled by a gateway controller even when an IP address of the gateway device is not fixed. The IP communications system includes a gateway device having a subscriber terminal interconnected thereto, a gateway controller for controlling the gateway device, provided on a subscriber side in accordance with a protocol conforming to the master-slave architecture, a database for providing subscriber information to the gateway controller, and an IP address allocator for dynamically allocating IP addresses. The gateway device requests the IP address allocator to allocate an IP address to acquire an IP address, and notifies the gateway controller of that IP address to get the IP address stored in the database.
摘要:
A magnetic recording and reproducing apparatus amplifies a current representing a recording signal reproduced from an information signal recorded on a magnetic tape, suppresses low frequency components of the current amplified signal, then amplifies a voltage representing the suppressed signal. The voltage amplified signal is supplied from a primary winding of a rotary transformer inside a drum to a secondary winding of the rotary transformer disposed outside the drum, and then its low frequency components are emphasized. This avoids the problems of an inadequate S/N in the low frequency components of the output of a voltage amplifier, and difficulty in providing a high voltage signal from a current amplifier. The emphasized signal is supplied to one of a plurality of equalizing circuits that respectively equalize a signal reproduced at one of a plurality of frequencies. The inputs of the equalizing circuits and a terminating resistance are connected to serially located nodes of a transmission line, with higher frequency equalizing circuits disposed closer to the terminating resistance, thereby avoiding introduction of amplitude distortion in the emphasized signal due to reflection along the transmission line.
摘要:
In a data recording apparatus, the data rate of an incoming information signal is used to select the frequency processing, such as band limiting or high frequency emphasizing, performed on the information signal to alter its frequency characteristic so that the information signal can be digitally recorded with magnetized patterns that are substantially similar even when recording at different recording speeds.
摘要:
A printing mechanism of a line printer for printing Braille characters is disclosed. The printing mechanism comprises a base member having a plurality of printing pins arranged in a row and adapted to be prevented from moving downward in response to the energization of solenoids corresponding to character patterns to be printed, a semicircular printing plate for pressing a paper against the printing pins and a printing plate driving mechanism. During every printing operation, the printing plate is rocked in a lengthwise direction by a pair of rotating disks provided at the ends of the printing plate and each including an eccentric cam groove different in phase with each other, so that the paper is successively pressed against the printing pins in the direction of their arrangement and the raised dots are produced. In another embodiment of the invention, the printing plate is operated by a pair of piston-crank mechanisms provided at the ends of the printing plate.
摘要:
An editing apparatus that executes editing processing with an encoded stream as an edit material is disclosed. The apparatus includes: an input means for receiving an operation input for designating the edit material used for editing, an editing effect, and start and end timing of the editing effect; an editing processing unit setting means for setting an editing processing unit of the edit material such that the editing effect at least a part of which until the editing effect ends after starting of the editing effect overlaps is included in one editing processing unit; a minimum encoding section setting means for setting a minimum encoding section; and an after-editing stream creating means for creating a part of an after-editing encoded stream by decoding the edit material, giving the editing effect included in the editing processing unit, and performing encoding on the basis of setting of the minimum encoding section.
摘要:
An exemplary device for preventing travel of an elevator car when a car door is open includes a receiver that remains in a fixed position relative to a hoistway wall. A stop member moves responsive to the car door moving toward an open position such that the stop member engages the receiver to prevent movement of the elevator car when the door is open.
摘要:
A detector for an electromagnetic brake, for example used in an elevator system, that, by quantitative judgment, determines whether the brake force of the electromagnetic brake is appropriate. Load cells for detecting the recovery forces of brake springs are arranged between brake springs, which energize brake arms with brake shooes installed on them toward the side of brake wheel, and spring sheets, which hold brake springs in a compressive deformed state, and, at the same time, judgment part judges whether the brake force of electromagnetic brake 4 is outside a prescribed normal range based on the outputs of load cells. If the brake force of electromagnetic brake is outside the normal rnage, judgment part sends a signal, for example to a monitoring center.
摘要:
An exemplary device for preventing travel of an elevator car when a car door is open includes a receiver that remains in a fixed position relative to a hoistway wall. A stop member moves responsive to the car door moving toward an open position such that the stop member engages the receiver to prevent movement of the elevator car when the door is open.
摘要:
An IP telephone system having a function for holding a call connection when a first IP telephone terminal disconnects a call connection and a function for calling back from a second IP telephone terminal to the first IP telephone terminal when the call connection is in a hold state. The IP telephone system of the present invention includes a holding device. When the first IP telephone terminal goes into an on-hook state, an IP telephone exchange which manages the first IP telephone terminal switches the call connection between the first and second IP telephone terminals to a call connection between the holding device and the second IP telephone terminal. In addition, when the second IP telephone terminal requests a callback, the IP telephone exchange switches the call connection between the holding device and the second IP telephone terminal to a call connection between the first and second IP telephone terminals.