Matsushita Electric Industrial Co., Ltd.

Hitoshi Kurohata

Masayuki Watanabe

Hiroshi Yamaya

Jun Kawai

Tugio Ohigashi

Toru Ueki

Nobuyoshi Hizuka

Shigeru Kakimi

Joji Nakamura

Yoshihumi Morimoto

Senji Kawai

Yukio Masho

Satoshi Miyauchi

A coin selection apparatus comprises a plurality of detection coils and an oscillation circuit which detects changes of impedances of the detection coils caused when a coin pass through the detection coils, as a change of a voltage output. The plurality of detection coils include at least two sets of detection coils each including two detection coils opposingly arranged to the coin path. One set of detection coils has its two coils connected in series and in phase and the other set of detection coil has its two coils connected in series and in phase opposition. The two sets of coils are arranged at a spacing along the coin path smaller than a minimum diameter of a coin to be selected and all of the coils are connected in series and connected as a resonance element of the oscillation circuit. Thus, material, thickness and diameter and other appearance characteristic of the coin are detected based on the voltage output of the oscillation circuit. Accordingly, the coin selection apparatus is of simple construction and has a small number of components.

Coin selection apparatus

A connector unit, which comprises an insulating housing carrying a plurality of connection pins planted therethrough and accommodating a dielectric plate formed with through-holes penetrated by the connection pins and provided on both sides with electrodes. Thus, a capacitor is connected between each connection pin and earth, so that the connector unit is capable of preventing external interference waves from being introduced through the connection pins into the electric apparatus and also preventing spurious waves generated within the electric apparatus from radiation to the outside through the connection pins.

Connector unit

A noise suppressing connector comprises a shielding casing, first and second contact pins to be connected to external circuits, and a filter including at least one capacitor and a coil wound about a core made of a ferromagnetic material. An insulative housing is enclosed by the casing, and this insulative housing has a partition defining a bore with the inner wall of the housing. The first contact pin passes through the partition to project into the bore, while the filter is disposed in the bore to be connected between the first and second contact pins. At least one conductive plate is disposed in the bore and is connected to the casing for effectively shielding the filter and for serving as a ground circuit. The space in the bore may be filled with a suitable insulative material. The number of capacitors and coils may be increased to constitute a desired filter, such as a low-pass, high-pass or band-pass filter. With this provision noises which tend to pass through the connector are blocked, while induction and radiation of interfering waves and spurious waves are effectively prevented.

Noise suppressing connector

A channel indicator for a television set etc. which comprises a thin film tape, on which tape the numbers of channels are printed, and a tape-advancing means which is linked to a tuner so that the tape is advanced to indicate the number of the channel that is selected by the tuner. The indicator also comprises a fine adjusting means for adjusting the tape so that the numbers of channels are placed appropriately in an indication window.

Channel indicator

Growing community of inventors

Komaki, Japan

Hitoshi Kurohata