Secom Co., Ltd.

Mineo Shigemitsu

Osamu Nakamura

Toshi Minami

Toshikazu Miyasaka

Ryoi Onda

Shigeru Niimura

Kenichi Matsumoto

Ichiyo Maruyama

A data communication system adaptable to a ciphered data communication includes a data transmission line (3) for transmitting ciphered or non-ciphered data between a data transmitting device and a data receiving device 11, a data transmitting device (1) for transmitting data, a data receiving device (5) for receiving data transmitted through the data transmitting device, a data ciphering apparatus (2) on the side of the data transmitting device, and a data deciphering apparatus (4) on the side of the data receiving device. The data ciphering apparatus including switching device (2A), line condition detector device (2B) control code monitor, scrambling device (2E), and drive control (2D). The line condition detector device, the control code monitor, and the scrambling device supply the transmission line through the switching device with ciphered data of the data from the data transmitting device. The data deciphering apparatus includes switching device (4A), line condition detector device (4B), control code monitor (4C), descramble device (4E), and drive control device (4D). The line condition detector device, the control code monitor, and the descrambling device, receive data and supply the data receiving device through the switching device with deciphered data of received data transmitted through the transmission line.

Adaptive data ciphering/deciphering apparatuses and data communication

In an apparatus for detecting a pattern of crest lines according to the present invention, an object area to be treated is mechanically divided into a plurality of picture elements (Ej), and the direction of crest lines such as a dactylogram can be easily detected by a simple calculation consisting of addition, subtraction, multiplication, and division, by using evaluated shading values in a series (Si) of picture elements, each unit area (UA) consisting of some picture elements of all picture elements in the object area. Therefore, even when the crest lines are cut off, crushed, or branched off, on the way thereof, the direction of the crest lines can be correctly detected.

Apparatus for detecting pattern of crest line

A system for detecting an alarm for emergency situations of a door or a window of a building or house in a predetermined guard area, comprising: an alarm circuit, including a plurality of alarm switch units for detecting emergencies and a resistor and a capacitor connected between first contacts and second contacts of the alarm switch units; and an alarm device, including a detecting circuit for detecting voltage changes of a predetermined measuring point, a pulse oscillator for generating a pulsating voltage, and a transistor for repeatedly turning on and off the current in response to the pulsating voltage applied from the pulse oscillator.

System for detecting an alarm

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Mitaka, Japan

Mineo Shigemitsu