摘要:
A radio-frequency device has a distributor and a tuner. The distributor has an input terminal which is disposed on one side face of a case; an output terminal which is disposed on another side face; and an output terminal which is disposed on the upper side face. The output terminal, and an input terminal of the tuner are respectively protruded at positions which are separated from the bottom face by a substantially same distance. A metal flat plate portion is led out from the side of the distributor and coupled to a receiving portion of the tuner on the side of the input terminal. Therefore, the output terminal of the distributor is directly connected to the input terminal of the tuner, so that a radio-frequency cable for connecting the units to each other is not necessary. A space reduction and a low production cost can be realized.
摘要:
An abacus for performing calculations by sliding counters along partition walls extending vertically. Each counter has a spherical or beadlike head protruding above the body of the abacus, as well as a stem. Shafts extend horizontally through the partition walls and also through the stems of the counters. A hole is formed in each stem of the counters and horizontally extends partially through the stem. A compressed spring is mounted in each hole, and a small ball is attached to the front end of the spring. The side surface of each counter which is not in contact with the ball is pressed against the opposed partition wall by the action of the spring. Thus, the counters are maintained at their present positions even in a moving vehicle.