Abstract: A motor actuated bell comprises a crank member operatively connected to a motor drive shaft. An elongated connecting plate is connected at one end thereof to the crank member for being reciprocally moved along its axis. A pivotal lever is connected at one end thereof generally perpendicularly to the other end of said connecting plate for being subjected to swinging movement. A hammer means has a resilient means resiliently supporting a hammer element on the lever.

Abstract: In a motor actuated bell a cam member is operatively connected to a motor drive shaft. The cam member acts directly on a leaf spring for moving a hammer attached to the leaf spring generally in parallel relation to the axis of rotation of the cam member to thereby allow the hammer to strike against an associated gong.

Abstract: A motor actuated bell assembly comprises a housing box having a body with an open top and a lid for closing the open top. The motor actuated bell includes a base having an integral support portion on which a gong is mouted. The base is fastened to the box body adjacent to the open top thereof with the motor actuated bell accommodated within the box body.

Abstract: Gong striking mechanism is provided, which comprises a driving electric motor mounted on a frame within a gong, conversion means rotationally connected directly or indirectly to the motor shaft for converting continuous rotational motion of the motor shaft to reciprocal gong striking motion, and resilient means adapted to absorb impact forces during gong striking motion and disposed intermediately between the motor and a hammer.

Abstract: An improved magnetic proximity switch which comprises an auxiliary permanent magnet for retaining normal closing and a yoke arranged so that the magnetic path of said auxiliary permanent magnet and the magnetic path formed by the magnetic flux from outside are added each other. Thus, the switch has such merits that the contact pressure at the time of normal closing is raised, the working sensitivity is enhanced, with a small external magnet, without mis-working due to shock or vibration from outside and the like.

Abstract: A double gong bell has an outer gong and an inner gong separately arranged to accommodate the inner gong within the space defined by the inner surface of the outer gong. In one embodiment at least two hammer driving members, disposed within the space defined by the inner surface of the outer gong and slidably supported within a mounting means are adapted for reciprocal movement upon the action of a hammer driving means. The ends of the hammer driving members closest to the gongs are attached to a first resilient member and a hammer. A pair of second resilient members attached to the hammer driving members and the mounting means are biased to urge the hammers to strike the inner and outer gongs upon the action of the hammer driving means generating a bell sound having composite tone colors.

Abstract: A motor actuated bell comprises a motor having a drive shaft and a cam means connected to the drive shaft. The cam means is engageable with an elongated hammer intermediate the opposite ends thereof to intermittently move the hammer away from a gong against the bias of an urging means. When the cam means becomes disengaged from the hammer, the hammer is moved along its axis into striking contact with the gong under the action of the urging means.

Abstract: A motor actuated bell which comprises a gong having an extension at a predetermined inner surface thereof; an electric motor having a drive shaft; transmission means for transmitting torque of said electric motor to a slotted ring to impart an angular moment to the ring. The transmission means has a projecting portion formed thereon to engage with the slot of the ring and a hammer for striking said gong at the extrusion of the inner surface in circular movement relation therewith. A connecting member operatively connects said hammer to said slotted ring. The motor actuated bell may preferably be used in a fire bell, an alarm bell or the like.

Abstract: A motor actuated bell comprising a motor having a drive shaft; transmission means for transmitting the rotational movement of the shaft to a second supporting shaft; a cam member which is fixedly mounted on the second supporting shaft; at least two hammer driving means disposed to be capable of moving reciprocally back and forth in relation to the gong and arranged respectively in continuous contact with the cam surface by a biased force of each first resilient means which is provided to said respective hammer driving means; and a hammer connected to each hammer driving means through a second resilient means so as to transmit the reciprocal movement of said hammer driving means to the hammer thereby striking the gong with the hammer. The motor actuated bell may preferably be used in a fire bell, an alarm bell or the like.

Abstract: A motor driven bell sound generation system is constructed such that rotational movement of a motor is converted into reciprocative hammering operation or single directional striking operation of hammer means via a crank means, driving means with radial protrusions on the outer periphery thereof or lever mechanism, whereby the required quality and volume of bell sounding is produced. A resilient means comprising a coil spring-leaf spring combination or single coil spring may be arranged for conversion of the rotational movement of the motor into the hammering or striking operation of the hammer means between the motor and the hammer means. Rotational movement of the motor may be converted into a reciprocative striking operation of the hammer means via a combination of driving member having ratchet on the outer periphery and a leaf spring.

Abstract: A motor actuated bell comprises a pneumatic actuator. A hammer is operatively associated so as to be movable into striking contact with an associated gong to produce bell sound.

Abstract: An electrically operated bell comprises an electric drive means and a pivotal lever supporting a hammer means. The lever is operatively connected to the drive means for intermittently moving the hammer means into striking contact with a gong. The lever has a pivot adjusting means by which the fulcrum of the pivotal lever can be varied.

Abstract: In a motor driven type gong striking mechanism, the rotation of the main shaft of an electric motor is converted through a crank mechanism into the oscillation of a piston plate, a gong striking hammer is coupled through a spring to the piston plate so that the hammer is oscillated, and a gong is disposed in the range of oscillation of the hammer. Thus, as a result of the rotation of the motor, the hammer is oscillated to strike the gong provided in the stroke of the hammer.

Abstract: An alarm buzzer comprising an electromagnet, a yoke on which said electromagnet is mounted while maintaining insulation from the housing, an armature which is held with a plate spring on said yoke and is attracted by said electromagnet, a vibratory plate which contacts said armature, and a housing which incorporates the above components, wherein the bobbin of said electromagnet is made of an insulating material and consists of a hollow cylinder which receives an iron core in it and is wrapped with coil on its outer periphery, first flange provided on one end of said hollow cylinder, second flange provided on the other end of the hollow cylinder and at least one hollow projection provided on said second flange in the direction parting from said first flange, said yoke is provided with at least one hole into which said hollow projection of the bobbin is inserted, and the bobbin and the yoke are fixed to the housing of the alarm buzzer by a fixture which is inserted into the hollow projection of the bobbin inser

Abstract: An alarm buzzer comprising an electromagnet, a yoke on which said electromagnet is mounted while maintaining insulation from the housing, an armature which is held with a plate spring on said yoke and is attracted by said electromagnet, a vibratory plate which contacts said armature, and a housing which incorporates the above components, wherein the bobbin of said electromagnet is made of an insulating material and consists of a hollow cylinder which receives an iron core in it and is wrapped with coil on its outer periphery, first flange provided on one end of said hollow cylinder, second flange provided on the other end of the hollow cylinder and at least one hollow projection provided on said second flange in the direction parting from said first flange, said yoke is provided with at least one hole into which said hollow projection of the bobbin is inserted, and the bobbin and the yoke are fixed to the housing of the alarm buzzer by a fixture which is inserted into the hollow projection of the bobbin inser