Canon Kabushiki Kaisha

Canon Denshi Kabushiki Kaisha

Cannon Kabushiki Kaisha

Hohnen Oil Co., Ltd.

Hideaki Miyakawa

Masanori Uchidoi

Hiroshi Aizawa

Makoto Kameyama

Satoshi Watanabe

Masayoshi Yamamichi

Mitsuaki Seki

Tadashi Ito

Kenichi Nagasawa

Tetsuya Taguchi

Masami Shimizu

Yukio Mashimo

Shinichi Hara

Hiroatsu Kondo

Toshiaki Ozawa

Yukio Iura

Teiji Hashimoto

Reiji Mitarai

Osamu Ohshima

Fumio Hata

Kou Yoneda

Masahisa Fukui

Tokuichi Tunekawa

Yasuo Tamura

Takaaki Aoki

Masahiro Tokuda

Kanichi Miyake

Yasuki Takahashi

Masaichi Satoh

A sound signal from an audio amplifier is converted to a speed signal by a drive circuit, and a cone sheet which forms a diaphragm is driven by a supersonic wave motor driven by a travelling vibration wave through a link and a leaf spring.

Speaker and drive device therefor

A magnetic head comprises a first magnetic core member of a magnetic material bulk having one surface thereof as a gap forming surface, a gap member of a non-magnetic material attached to at least a portion of the gap forming surface of the first magnetic core member, and a second magnetic core member of a magnetic material thin film attached to said gap forming surface substantially perpendicularly thereto with the gap member being interleaved therebetween.

Method of manufacturing a magnetic head having a thin film in a portion

A magnetic head including a head base consisting of blocks, and having a penetration hole therethrough, a magnetic thin film formed on the head base to define a magnetic circuit and a coil wound around the magnetic thin film and the head base through the penetration hole.

Magnetic head having a thin-film and a coil

In a small-sized printer having hammers provided within a type ring according to the invention, a direction in which the hammer is moved is changeable over selectively so that printing may be carried out in different positions. Also, electronic apparatus is provided which has a hammer mechanism as well as a battery or motor mounted in the type ring so as to miniaturize the apparatus.

Drive mechanism for a small-sized printer

A magnetic head including first and second magnetic core assemblies is provided, wherein the first assembly has a first portion forming a magnetic gap, a pair of second portions of magnetic material arranged on both sides of the first portion, and a pair of third portions of non-magnetic material arranged at a position adapted to sandwich the pair of second portions. The second magnetic core assembly includes a fourth portion of magnetic material which forms a magnetic circuit together with the pair of second portions. The head also has a groove facing at least one of first and second magnetic core assemblies for receiving a winding.

Method for manufacturing a magnetic head for performing high density

A rotary head device comprising a stationary cylinder having a step portion on its peripheral surface to guide a tape-shaped medium and a rotary cylinder arranged to rotate freely relative to the stationary cylinder and having a corresponding diameter to that of the above-described stationary cylinder, the rotary cylinder being formed with an integral peripheral surface portion on the nearer side to the stationary cylinder of a rotary head mounted so as to project outwardly of a peripheral surface of the rotary cylinder.

Rotary head device

Printer with rotatable print band

An electromagnetic transmitting apparatus for a camera includes a first device at the main body of the camera to convert electric energy within the camera main body to magnetic energy, and a second device to receive the magnetic energy and convert it into electric energy. The second device is in a unit which can be mounted on the camera body, so that the electric energy at the camera main body is transmitted to the unit including the second device when the unit is mounted on the camera main body.

Electromagnetic transmitting apparatus for a camera

A printing hammer as a movable member holds a magnet integrally therewith, yokes having coils wound thereon are disposed substantially at right angles with the direction of movement of the movable member and in opposed relationship with the magnet, and a printing member is disposed in the direction of movement of the printing hammer.

Printer with electromagnetic drive yokes

A cold-setting starch adhesive comprising the mixture of three different types of corn starch having widely different properties, i.e., high amylose corn starch having an amylose content of at least 50%, ordinary corn starch and waxy corn starch, in specific proportions. The adhesive shows excellent properties due to the effective combination of the outstanding properties of the individual types of starch.

Cold-setting starch adhesive

In an electromagnetic release for a camera a normally de-energized electromagnet is coupled with unitarally joined elongated pole pieces, and when energized, generates a magnetic flux opposing the magnetic flux of a permanent magnet. A moveable, magnetizable armature adjacent corresponding ends of the pole pieces is normally attracted by the pole pieces as a result of the flux of the permanent magnet when the electromagnet is deenergized. The permanent magnet is positioned between the pole pieces. A spring biases the armature to disengage it from the faces of the pole pieces.

Release type electromagnetic device for camera

An automatic exposure control apparatus of electric type for a photographic camera having an exposure control parameter setting means cooperative with a geometrical progression scale in isometric graduation is provided with a resistor device. The device includes a variable resistor having a grounded slider associated with the setting means upon movement thereof for providing a resistor value proportional to the amount of movement of the setting means, but to the reciprocal logarithm of the preselected parameter value. In order to minimize the complexity of a computer circuit responsive to the various outputs of the resistor device for performing photographic Appex computation, a bias voltage is applied to each of the variable resistors in a manner to produce a signal in the form of current proportional to the reciprocal of the amount of movement of the setting means. The resistor device has a single substrate having a plurality of resistor elements formed thereon by a metal coating technique and arranged for cooperation with respective sliders, thereby improving the exposure control accuracy and stabilization of the performance of the computer circuit against variation of temperature distribution in the apparatus.

Automatic exposure control apparatus and a camera having the same

A photographic camera having a magnetic actuating device associated with an electronic control device for initiating a release of one or more of the camera mechanisms from the cocked position thereof. In one embodiment of the invention, the magnetic actuating device comprises a single magnetic winding with a core material having a substantially rectangular hysteresis loop, and an armature of which the movement is controlled by the polarity of the magnetic winding and which is connected to spring-biased means for latching the mechanism in the cocked position. After the core is magnetized by applying a voltage to the magnetic winding for a relatively short period to hold the armature with the latching means in the cocked position against the force of the spring, the magnetic winding is energized by an output of the opposite polarity from the electronic control device causing the armature to move away from the core, whereby the release of the mechanism is initiated.

Photographic camera with an electromagnetic control system

The device includes a permanent magnet for attracting a movable iron armature. A pair of elongated rectilinear magnetic bodies have planar pole faces at one end facing the iron armature, and the permanent magnet is sandwiched between these two magnetic members intermediate their ends, with the permanent magnet extending perpendicularly to the magnetic members. Respective magnetizing windings embrace each magnetic member between the permanent magnet and the pole faces of the members, to produce a magnetic flux in the magnetic members opposing the flux provided by the permanent magnet so as to release the iron armature. In one embodiment of the invention, the other ends of the members, projecting beyond the permanent magnet, are angled to face each other to provide an air gap therebetween. In a second embodiment of the invention, the magnetic members or yokes have respective second windings thereon, beyond the permanent magnet, and the ends of these yokes, beyond the second windings, are formed with planar pole faces for operative association with a second iron armature. Both iron armatures are spring biased to disengage the magnetic yokes or members. As the permanent magnet engages the yokes intermediate their ends, the magnetic flux path due to the magnetizing windings does not include the permanent magnet and therefore an effective armature releasing magnetic flux can be provided with only a relatively small current supplied to the magnetizing windings.

Growing community of inventors

Yokohama, Japan

Hideaki Miyakawa