Abstract: A small-sized electric mechanical transducer wherein plates are disposed to surround a bobbin in association with yokes. Magnetic passages are formed among the plates. Each of a pair of magnets drives the bobbin in accordance with the electric signals input into the driving coil. Also, an optical type pickup apparatus positively capable of the signal reading operation in which the lens holder is not out of shape even if the lens holder is driven in the focusing direction and the tracking direction, because the gravity center of the lens holder is conformed to the action point of the resultant force of the forces to be produced by the control signals to be input into the driving coil, and by the magnetic field of the magnetic circuit.

Abstract: A optical type pickup apparatus wherein the center of gravity of the lens holder coincides with the action point of the resultant force of the forces to be produced by the control signals input into the driving coil and by the magnetic field of the magnetic circuit. Thus, this apparatus may be provided which is capable of a signal reading operation wherein the lens holder is not out of shape even if the lens holder is driven in the focusing direction and the tracking direction.

Abstract: The invention provides an adhesive composition of the two-part separate application type comprising solutions A and B. The solution A is an aqueous solution of a high polymer having an amide bond or an imide bond within the molecule, or an aqueous dispersion obtained by adding a rubber latex and/or synthetic resin emulsion to the aqueous solution of the high polymer. The solution B is an aqueous solution of a dialdehyde compound, or an aqueous solution or dispersion obtained by adding a crosslinking agent for crosslinking the high polymer of the solution A to the aqueous solution of the dialdehyde compound.

Abstract: A blade device composed of a support frame mounted on the front end of an earth moving machine, a pair of blade members, whose each inside end is pivotably connected to the center of the front portion of said support frame and a pair of cylinder mechanisms interposed between said pair of blade members and said support frame. On the front surface of said support frame, a protecting plate covering the interconnecting portion of each said pair of blade members and said support frame is fixed.

Abstract: A bucket assembly for earthmoving machines which is capable of side dumping as well, and comprises a bucket, a bucket support and a hydraulic cylinder mechanism having a cylinder and a rod and interposed between the bucket and the bucket support. The bucket includes a bucket body, a first receiving portion and a second receiving portion provided at opposite upper side portions of the rear surface of the bucket body, and a first support portion and a second support portion provided at opposite lower side portions of the rear surface of the bucket body and having a first pivot pin and a second pivot pin extending nearly at right angles to the widthwise direction of the bucket body. The bucket support comprises a support body to be mounted on lift arms and tilt links of an earthmoving machine, a first supporting portion and a second supporting portion provided in the support body for receiving the first and second support portions of the bucket respectively from above and supporting them therein.

Abstract: A quick coupler for attaching and detaching an implement to and from a vehicle equipped with a lift arm and a tilt link includes a hitch having a lower supporting assembly with a lower link member and being pivotally connected to the lift art, and an upper supporting assembly with an upper link member and being pivotally connected to the tilt link, the lower link member being pivotally connected to the upper link member and being movable with respect thereto between an over-center locking position and an angularly collapsed and disengaged position, and having mechanical spring means urging the lower and upper supporting members together, and a hook arrangement secured to the implement and having a lower hook portion and an upper hook portion respectively receiving the lower and upper supporting assemblies therein with the mechanical spring means maintaining the upper and lower link members at said over-center locking condition.

Abstract: A quick coupler for attaching and detaching an implement to a vehicle equipped with a lift arm and a tilt link includes a hitch having a lower supporting assembly pivotally connected to the lift arm, an upper supporting assembly pivotally connected to the tilt link, and an actuator pivotally connected between the supporting assemblies and movable between an extended position and a retracted position, the lower and upper supporting assemblies being positioned between a substantially aligned first condition and an angularly collapsed second condition at the extended and retracted positions of the actuator, and a hook arrangement having a lower hook portion and an upper hook portion secured to the implement and respectively receiving the lower and upper supporting assemblies.

Abstract: A two-way bulldozer mechanism for mounting on an earthmoving vehicle includes an upper blade having an upper edge pivotally connected to the forward tip portions of a pair of push arms for pivotal movement thereabout and a lower blade hingedly connected to a lower edge of the upper blade for limited relative rotational movement to permit the attitude of the upper and lower blades to be adjusted to a first position suitable for forward bulldozing to a second position suitable for rearward dozing. A pair of levers have their intermediate portions pivotally connected to the push arms with each of the levers having its lower end pivotally connected to the lower blade and cooperates with the upper blade for controlling the attitude of the blades.

Abstract: A cable cleaning device equipped with a housing means having a through hole for a cable. The housing means is divisible in the direction of the diameter of the cable and accomodates therein a cleaning means of an elastomeric material composed of at least two segments and surrounding the peripheral surface of the cable. The segments of the cleaning means are movable in the direction of the cable diameter, and urged against the peripheral surface of the cable by a spring means within the housing means whereby the cleaning means comes into elastic engagement with the peripheral surface of the cable passing through the through hole and cleans the cable.