Title:
TRAVELING DIRECTION DETECTOR OF RAILROAD MODEL
Document Type and Number:
Japanese Patent JP3295242
Kind Code:
B2
Abstract:
PURPOSE: To securely detect a railway applied with a voltage, by periodically switching the direct current source by high-frequency and providing a means to hold the signals, when using an electric source altering only the duty while keeping the voltage constant.
CONSTITUTION: When a rail way L52 is laid at an L level and a voltage is applied on a rail way L51, the base of a transister TR2 in a signal level conversion circuit 3 is fixed in the L level and the TR2 turns off. On the other hand, a pulse voltage is applied on the base of a TR1 and while the level is H, TR1 turns on and the outputs 01, 02 of SR-FF4 are retained in the H, L levels, respectively and it is discriminated as the first traveling condition by the judging circuit 1. Next, when the polarity of voltage applied on the rail is changed over by a polarity-changing means, a purse voltage is applied on the base of TR2 reversely and while the level is H, TR2 is conductive and it is discriminated as the second traveling condition by the judging circuit 1.
Inventors:
Hajime Oda
Application Number:
JP19964594A
Publication Date:
June 24, 2002
Filing Date:
August 24, 1994
Export Citation:
Assignee:
Seiko Precision Co., Ltd.
International Classes:
A63H19/24; (IPC1-7): A63H19/24
Attorney, Agent or Firm:
Kazuko Matsuda
Previous Patent: FORMATION OF MULTILAYER INTERCONNECTION
Next Patent: FITTING DEVICE FOR PORTABLE RADIO EQUIPMENT
Next Patent: FITTING DEVICE FOR PORTABLE RADIO EQUIPMENT