Abstract: A vibrator mechanism, including a transducer and driving circuit, particularly adapted to vibrating a waterbed, includes two independently controlled vibration sources, each of which can generate vibration of varying amplitude and frequency. These two sources are typically mounted at opposite ends of a waterbed frame and vibrated at different frequencies so that interference waves may be produced within the water of the bed to produce a pleasing effect for the user. Additional circuitry is described which provides a time varying frequency and amplitude for each of the vibrators, and this circuitry is in turn controlled by a clock circuit so that, by using the time varying frequency and amplitude, the user may be slowly lulled to sleep or slowly awakened using the vibration within the waterbed as a stimulus for controlling the rate of falling asleep and waking up.

Abstract: An apparatus and method for detecting overstroke, understroke and/or overspeed, underspeed conditions in vibratory equipment includes a vibratory member mounted on the equipment to vibrate therewith and to operate solid-state switches over a large number of cycles. The preferred switches are Hall effect switches operable by a magnet carried by the vibratory member. During normal vibratory motion, a normal stroke Hall effect switch resets a timing means which will operate as a missing pulse detector and will generate an abnormal pulse if it is not reset during a predetermined period of time. If the amplitude is too large, the overstroke Hall effect switch is operated and causes an abnormal condition pulse. A control circuit means is operable by an abnormal pulse to generate an alarm and/or shut down the vibrating equipment.

Abstract: A control circuit for an electromagnetic cutting apparatus includes auxiliary power impulse systems and auxiliary condensers for accelerating an already moving plunger of the cutting apparatus. The basic control circuit includes photoelectric sensors for sensing the leading and trailing edges of components. The sensors are part of an electronic circuit for rapidly charging a coil surrounding a core on the plunger for driving a blade downwardly to cut the tape. Condensers in the electronic circuit are normally charged and, in response to signals from the photoelectric sensors, instantaneously discharge into the coil to actuate the plunger. The auxiliary power impulse systems and auxiliary condensers are controlled by timers for discharging the auxiliary condensers into the coil a short time after the condensers of the basic circuit and while the plunger is moving to accelerate the latter.

Abstract: The vibration motor comprises a concentrator of torsional vibrations, whose end face is in close contact with a rotor, and a piezoelectric cell unit adjoining the concentrator of torsional vibrations. Besides, the vibration motor is provided with a magnetic field source arranged under the rotor at the side of the concentrator of torsional vibrations and having a power sufficient to hold the rotor firmly against the concentrator end face, and with magnetic circuit. One part of the latter is movable, being fashioned as a disk with circumferentially spaced slots and rigidly connected to the rotor. The other part of the magnetic circuit separated from the first one by an air gap is stationary. It surrounds the magnetic field source and has peripheral slots identical to those of the movable disk and arranged opposite to them.

Abstract: A vibrator motor is coupled to the frame of a body support structure to vibrate the latter. The motor is energized by a train of triangular pulses modulated by a triangular pulse signal having a lower frequency than that of the triangular pulse train.

Abstract: An electromagnetic hammer has a coil coacting with an axially reciprocable armature including a ferromagnetic core traversed by an elongate nonmagnetic ram which carries at one end a spring-loaded piston head forming part of a pneumatic damping device, its other end co-operating with a working tool. The coil is intermittently energizable by a control system including a capacitor chargeable from an electric power supply by way of a first thyristor and dischargeable through the coil by way of a second thyristor, the two thyristors being sequentially triggered in response to a control pulse applied to a transformer with two secondaries generating staggered firing pulses with the aid of a delay network in the output circuit of one of these secondaries.

Abstract: An ultrasonic power generator for operation at a one and a half kilowatt power output from a 220 volt, 50 hertz AC line comprising a transducer coil impedance associated with a resonant capacitor, said generator being generally designed for a one kilowatt power output from a 110 volt, 60 hertz AC line. The generator circuit includes at least one thyristor for switching the resonant capacitor terminals and an oscillating circuit having a time basis including said capacitor designed for circulating a high frequency current at the desired ultrasonic operating frequency sufficient to generate one and a half ohmic kilowatts. A small high Q inductance is added to the inductive reactance of said transducer coil for adjustment to the capacitance values of the oscillating circuit.

Abstract: A material dispenser comprising a material receiver, an elongate vertical material conducting duct communicating with and depending from the receiver and having a lower open discharge end, a vertically opening metering orifice in the duct, a valving member normally engaged in the orifice in a closed position and shiftable vertically to an open position, an armature freely engaged in the duct and shiftable upwardly therein from a lower normal position, means drivingly connecting the armature and the valve member, an annular coil about the duct and positioned so its field normally intersects the armature whereby the armature is drivingly elevated and the valve member is moved to its open position when the coil is energized, a power supply connected with and operable to cyclically energize the coil and including a half-wave rectifier in series with the coil and a resistor in parallel with the rectifier, whereby the coil is energized by pulsating direct current and supplemental alternating current.

Abstract: An electrical apparatus for producing pulsating high torque rotational vibration movement combined with a slow superimposed unidirectional rotary motion is disclosed. The apparatus includes an alternating current motor combined in a mechanically resonatable system with electrical apparatus producing a non-alternating component of magnetic flux in the motor structure. The torque generating ability of the motor is increased approximately five-fold even though the motor is operated from the same supply voltage. The disclosed apparatus is illustrated connected to a waste disposer device.

Abstract: An electrical apparatus producing pulsating high torque rotational vibration movement combined with a slow superimposed unidirectional rotary motion is disclosed. The apparatus includes an alternating current motor combined in a mechanically resonatable system with electrical apparatus producing a non-alterating component of magnetic flux in the motor structure. The torque generating ability of the motor is increased approximately five-fold even though the motor is operated from the same supply voltage. The disclosed apparatus is illustrated connected to a waste disposer device.