Abstract: In the time detecting device of an alarm clock is provided with an hour gear wheel and an alarm gear wheel, each having an indication hand, engaging with a second hour gear wheel and a second alarm gear wheel respectively. An detecting cam plate is provided so as to be axially shiftable and continuously pushed and turned by the second hour gear wheel. A projection is formed on either the second alarm gear wheel or the detecting cam plate while a hole is formed on the other. When the respective phases of the projection and the hole coincide, the detecting cam plate is allowed to shift to actuate the alarm device.

Abstract: An alarm clock comprises at least one rotationally driven rotatable time wheel, at least one rotatable detecting wheel rotatable relative to the time wheel to phases corresponding to alarm signaling times by an alarm signaling time setting wheel, and a time detecting switch having an open switching state when the time wheel is out of phase with the detecting wheel and switchable to a closed switching state when the time wheel rotates into phase with the detecting wheel to thereby enable the sounding of an alarm at preselected alarm signaling times.

Abstract: A luminance detecting module and an focus detecting module are actuated in the first step of shutter release operation and an exposure control module is actuated in the second step. All of these modules are connected to a single electromagnet. When a photographing impractible signal is given in the first step of the shutter release operation, the electromagnet actuates a release locking member so that the shutter release motion is interrupted.

Abstract: A first detecting means for detecting the phase of an hour time wheel and a second detecting means adapted to cooperate with a projection provided with each of some of a plurality of minute indication leaves, said some leaves occurring at a constant interval, are provided. The first and second detecting means are associated together, and with detection of phase by the first detecting means the second detecting means is rendered capable of cooperation with the projection of a minute leaf. Subsequently, when the phase of the projection is detected by the second detecting means, an alarm device is operated.

Abstract: A second hand correction device comprising a second hand correction member which may be moved manually in inward and outward directions and in forward rotation and reverse rotation directions and a cam wheel, having a plurality of cams, which is fixed to the second hand axis. The second hand correction member is moved in such a direction as biased under an engagement with the cam wheel when the same is lowered, and engages with the cam at the rear half of its stroke. Subsequent lowering operation of the second hand correction member will cause the rotation of the cam wheel and thereby the second hand will be rotated by a specified angle to enable a repetitive continuous correction for the second hand.

Abstract: An alarm signaling time setting member is coupled to a minute indication drum having minute-scale alarm time graduations and an hour indication drum having hour-scale alarm signaling time graduations is intermittently advanced by the minute indication drum. First and second detection members for detecting the alarm signaling time are provided in correspondence to an hour time wheel and a minute time wheel respectively. The first detection member is geared to the second detection member, and the second detection member is geared to the minute indication drum to permit the detection member positions to be continuously set.

Abstract: First and second detecting wheels, the phases of which can be varied in accordance with the setting of an alarm signaling time, are provided in correspondence to an hour time wheel and a minute time wheel respectively. Among a plurality of leaves adapted for digitally indicating the minute time, some of the leaves, which occur at a constant interval of minutes, are each provided with a projection, and a third detecting means is provided to detect the presence or absence of this projection. An alarm device is actuated when the first and second detecting wheels and third detecting means are concurrently actuated.

Abstract: An alarm time is digitally indicated by the figures on a first drum indicating the hour unit and a second drum indicating the minute unit of the alarm time. An alarm setting indication plate comprises a shutter for covering the figures and an arm interlocked with an alarm stopping button through the first and second drums.

Abstract: In a battery powered alarm clock, an alarm switching device comprises at least one detecting wheel whose phase is set in accordance with the desired alarm time, at least one detecting switch which is closed when the phase of the time wheel of the clock corresponds to that of the detecting wheel and a printed circuit board having alarm circuitry mounted thereon with at least one land for connecting the alarm circuitry to one pole of the battery. The alarm switching device construction provides solderless connection by at least two battery contact plates for contacting the two poles of the battery. One of the plates provides three electrical contacts including a first contact with one pole of the battery, a second contact with the land on the printed circuit board and a third contact with the detecting switch, whereby the assembly and construction of the clock is greatly simplified.

Abstract: A slip mechanism for a timepiece comprises a rotational shaft having a pinion, a gear and a spring wherein the rotational shaft has a flange for supporting the gear, a mounting portion formed adjacent the surface of the flange for rotatably mounting the gear and slots formed above the mounting portion for engagement with the spring. The slots coact with recessed portions of the spring for preventing the spring from rotating with respect to the shaft.

Abstract: A stationary detecting means corresponding to a second time wheel rotating at a higher speed than the hour wheel generates signals at successive intervals of a fixed number of minutes to actuate a time signaling device. A first detecting means is also provided corresponding to the hour wheel. The phase of the first detecting means is set to determine or define an alarm or signaling time. When the phases of the hour wheel and the first detecting means are synchronized, a second signal is generated. The time signaling device is actuated when the time signals of the stationary detecting means and the second detecting means are generated simultaneously.

Abstract: A time detecting switch for an alarm clock comprises phase detecting type slide switches between rotatable coaxially mounted pairs of time wheels and detecting wheels which are rotated to the phases corresponding to an alarm signalling time according to an alarm signalling time setting. One of the pair of the two kinds of wheels comprises a disk of electrically insulating material having a hole therethrough, and an electrically conductive switch plate mounted on one face of the disk has an electric contacting portion which extends through the hole in the disk and bent to form a contacting face in the same plane with the other face of the disk.

Abstract: A time detecting switch for a time signalling clock having a time wheel and detecting wheel both rotatably mounted coaxially and a phase detecting type slide switch between the time wheel and the detecting wheel comprises one of the wheels comprising an electrically conductive hub having a flange with a radial contacting surface at one end of the hub, an insulating disc and a sectoral switch plate around the hub, the disc being sandwiched between the plate and the flange with the plate being mechanically and electrically connected to the other end portion of the hub facing the other wheel. The other wheel has a sliding contact for contacting the sectoral plate and the radial contacting surface of the flange is capable of maintaining uninterrupted continuous sliding contact with the signalling circuit of the clock.

Abstract: In a timepiece having a case and having a minute hand and an hour hand for indicating time, an alarm signaling device generates an alarm by detecting the phase of two sets of gears. One set of gears comprises an hour hand gear and an hour detecting gear and the other set comprises a minute hand gear and a minute detecting gear. The two sets of gears are concentrically mounted for rotation and the minute detecting gear is positioned between the minute gear and the one set of gears. The minute detecting gear has a contacting sliding contact with the minute gear. The alarm signaling device further includes an alarm signaling time setting wheel having an axis of rotation parallel to that of the two sets of gears and a first gear and a second gear engaging the minute detecting gear and the hour detecting gear respectively.

Abstract: A driving device including a magnetized driving rotor mounted for rotation within a magnetic field produced in a coreless coil, and, in order to make the magnetic pole of said driving rotor deviate by a definite angle relative to the magnet field direction of said coil, a supplementary magnetized rotor mounted for rotation outside of the coil and magnetically coupled with the driving rotor. And the supplementary rotor is provided with magnetic poles, the number thereof being greater than the number of poles of said driving rotor. The driving rotor has an odd number of pole pairs.

Abstract: In an electromagnetic driving device for example for an electric clock, a driving polar rotor arranged in the magnetic field of a coreless field coil drives a rotatable following polar rotor so that in their static states the poles of the rotors are shifted at a definite angle in the direction of the magnetic field of the coil. The driving polar rotor is rotatably supported within a bobbin on which the coil is wound and is retained in the bobbin by a rotor retaining part which is held in place by a printed circuit plate which controls the current flowing through the coil.

Abstract: A slip mechanism in the gear train of a clock comprises a gear wheel and an associated pinion coaxial with the gear. The gear wheel and pinion have interengaging surfaces for centering and rotatively guiding them relative to one another. A circle of resilient fingers on one of the gear wheel and pinions resiliently, frictionally and radially engage an annular friction surface of the other to provide a frictional coupling between them. Moreover hooks on the fingers retain the gear wheel and pinion in assembled relation to one another. In one embodiment the resilient fingers are integral with the pinion and are received in a concentric opening in the gear wheel of lesser diameter than a circle defined by the fingers in relaxed conditions. In another embodiment the resilient fingers are integral with the gear wheel and engage the outside of a concentric flange on the pinion of larger diameter than a circle defined by the fingers in relaxed condition.

Abstract: A driving wheel is mounted on the output shaft of a step motor, and a driven wheel engaging with gear wheels on which pointers are set is driven by said driving wheel. The driving wheel and the drive wheel have respective peripheral portions effective to couple the driving wheel with the driven wheel to rotate the driven wheel as the driving wheel rotates of an angular interval of rotation, and for thereafter disengaging the driving member from the driven member.In order to fix the position of a pointer after the driving wheel has finished rotating the driven wheel, the reversal preventing mechanism acts on the said driven wheel or the driving wheel. The driving wheel is driven by a stepping motor having a rotor which intermittently rotates in one direction through a predetermined angular interval to a rest position. The driven wheel is in turn intermittently rotated by the driving wheel to intermittently change the position of the pointer.

Abstract: An electromechanical driving device comprising a permanent magnet rotor mounted for rotation on a non-magnetic support plate, and a wheel train mounted on the support plate and driven by the rotor. A coreless field coil is mounted on the support plate and positioned to drive the rotor and thereby drive the wheel train when the coreless field coil is energized. The coreless coil is wound on a coil bobbin having an axial bore. The support plate includes a projecting portion dimensioned to fit within the axial bore of the bobbin to support the bobbin and thereby mount the same on the support plate.

Abstract: A driving mechanism including a stepping motor having a rotor which rotates through a certain angular interval each time the stepping motor is energized. A driving member having a plurality of radial slots is mounted for rotation about an axis and is rotated by the rotor. A driven member is mounted for rotation and includes a pin extending therefrom for engaging one of the slots as the driving member rotates and for disengaging from the one of the slots after the driving member has rotated past the certain angular interval, whereby the driven member is rotated through the certain angular interval upon energization of the stepping motor. The driving member includes arcuate peripheral portions over a limited angular extent and concentric with the axis of rotation of the driving member. The driven member includes concave arcuate portions of limited angular extend spaced about the periphery thereof.