Abstract: Device for locking and unlocking a cutting head frame on the housing of a dry shaver, with up ramps and down ramps provided on the cutting head frame as guide means for locking elements located in the housing.

Abstract: Dry shaver with an auxiliary frame displaceably insertable in the direction of the lower cutter, said frame being retained via spring-tensioned locking means in the end cheeks of a shaver housing or of a cutting head frame, and unlocked and removed in the removal direction by unlocking buttons, which act on the up ramps provided on the locking means.

Abstract: A multipurpose kitchen machine is proposed which, in order to increase its usefulness, in addition to its working container has at least one inner container insertable into said working container, said inner container increasing the efficiency of food processing, especially for small batches, by adjustment to individual tool shapes, and facilitates separate processing of different food batches. A special lid can be used to seal both the inner container when placed in the working container and both containers individually.

Abstract: In a shaving head for dry shavers with a shaving head frame removably disposed on the shaver housing an an interchangeable frame insertable therein, in which a shaving foil cooperating with a reciprocating cutting head is convexly tensioned, the interchangeable frame is positively locked directly to the shaver housing.

Abstract: In a shear element for a dry shaving or hair cutting apparatus, the shear element being provided with hair inlet openings having an entry zone and a cutting zone, the improvement wherein a first approach edge is provided intermediate the entry zone and the cutting zone, the first approach edge being substantially perpendicular to a longitudinal axis of the entry zone, whereby a guidance path is provided which changes direction at least twice between the entry zone and the cutting zone.

Abstract: In a swing bridge for conversion of rotary motion of an eccentric driven by a motor shaft into a reciprocating movement of the power output for a tool in electrically powered appliances, consisting of a bridge yoke comprising the power output and mounted on two strip-shaped film hinges and a connecting rod coupled to the swing bridge and the eccentric, aligned parallel to the bridge yoke, one of the strip-shaped film hinges and the corresponding wall of the bridge yoke are each provided with an opening through which the connecting rod is guided in such fashion that the connecting rod head coupled with the eccentric lies outside the space defined by the bridge yoke and the film hinge and whereby the bridge yoke forms a rigid unit with the formed walls.

Abstract: The subject of the invention is a circuit for monitoring the charge state of a battery for supplying voltage to an electrical consumer through a mode selector switch which may be switched from an OFF-state for disconnecting the electrical consumer from the battery into an ON-state for connecting the electrical consumer with said battery whereby in said ON-state different modes of operation of said electrical consumer are possible. The charge state of the battery is determined when the mode selector switch is in the ON-state and, when the voltage drops below an adjustable threshold value, an acoustic and/or optical indication is triggered after the electrical consumer is switched off. The circuit in the ON-state consumes only a very slight amount of energy and no additional energy in the OFF-state. In addition to the mode selector switch for switching the electrical consumer on and off, no battery test button or additional battery test position of the mode selector switch is required.

Abstract: A method for producing a shear element having protrusions on the skin contacting surface thereof, including the steps of coating an electrically conductive surface with a photoresist, exposing the photoresist to a hold pattern and developing the photoresist to produce a grid pattern wherein the electrically conducting surface is exposed, the grid pattern defining hole areas wherein the electrically conductive surface is covered by islands of photoresist of a predetermined thickness, introducing irregularities into the surface elevation of the exposed grid, the surface irregularities being of lesser dimension of the thickness of the photoresist islands, depositing an intermediate foil onto the exposed grid overlying the introduced surface irregularities, the intermediate foil being of sufficient thickness to extend above the photoresist islands when deposited, depositing a shear foil overlying the intermediate foil, and removing the shear foil from the intermediate foil, thus producing a shear foil having prot

Abstract: A constant voltage or constant current output circuit is disclosed which can be operated with input voltages which fluctuate sharply at nearly any frequency. A pulse width modulated (PWM) switching transistor is used with a choke inverter. The PWM switching transistor is input and output level responsive. A second transistor is connected to the switching transistor and is used to block operation of the switching transistor. The electronic device according to the invention supplies a constant output voltage even at input voltages between 70 and 264 volts and stimulates oscillation absolutely reliably even under maximum load. In addition, the device is suitable for DC and AC voltages of any frequency and merely requires a simply designed voltage regulating circuit that uses only ordinary components.

Abstract: A hair curling unit, for example a curling iron, which has a catalytically acting heating device, wherein a regulator device is situated between the gas supply chamber which contains the fuel gas and the winding body. The movable valve element (13) of said regulation device is guided in an integrally designed regulator frame (40). Here, the regulator frame also comprises the valve seat (33), the bearing pin (34) for the regulating lever (16), and the spring collet (41) for the bimetallic temperature measuring element. The regulator device, as an independent component, is solidly connected with the handle part which encloses the gas supply chamber. Thus, the material changes which occur during operation--for example the swelling of plastic parts--do not cause any change of the distance between the headpiece of the regulator rod and the valve seat (33).

Abstract: An electric travel iron includes as an upper component a hand-held hot air type hair-dryer having a hand grip, an electric heating unit for heating a stream of air and an outlet duct having an open end through which a hot air stream is discharged. The lower component of the iron comprises a thin flat metallic ironing plate detachably connected to the air outlet duct of the dryer in spaced confronting relationship to the open end of the duct. The ironing plate is planar and has an upper side facing the open duct end to define a direct hot-air impingement surface region and extends laterally outwardly from the direct hot-air impingement region beyond the contour of the duct end for providing a region heated by hot air laterally deflected from the direct hot-air impingement region. The lower side of the ironing plate forms the ironing surface.

Abstract: An electronic switching power supply for supplying power to an electrical load from a variable voltage level AC or DC voltage source having first and second terminals, the power supply including a transformer having a primary coil and a secondary coil, a first terminal of the secondary coil being connected to the electrical load, a first transistor connected in series with the primary coil, a first diode connected in series with the secondary coil and the electrical load, a first capacitor connected between the base of the first transistor and a second terminal of the secondary coil, a second transistor, the collector-emitter line of which is connected across the voltage source, a first resistor connected between the first terminal of the secondary coil and the collector of the second transistor, a second resistor connected between the first terminal of the secondary coil and the emitter of the first transistor, and a discharge circuit connected between the first capacitor and the electrical load, whereby the

Abstract: In a contact device having at least first and second contact surfaces which may be placed in electrically conducting contact with one another, that improvement which includes a solder-repellent and self-lubricating casing material applied to at least one of said contact surfaces. The solder-repellent contact surface also serves as a stop-off when soldering component leads to terminals of a printed circuit board.

Abstract: A quick-release mechanical coupling for a kitchen appliance with a drive shaft, which includes an attachment for the kitchen appliance, a first coupling ring rotationally integral with the attachment, a second coupling ring rotationally integral with the drive shaft, at least one connecting pin provided on one of the coupling rings, and at least one recess provided on the other coupling ring, the recess having a central slot portion and first and second branch portions extending in opposite circumferential directions from the central slot portion.

Abstract: A control circuit for supplying a relatively constant operating voltage to an electrical load over a relatively wide range of supply line voltages, including an electronic switch connected in series with the electrical load and having a control lead, a reference voltage generating element, and a comparator for receiving the reference voltage and a voltage representative of the actual voltage applied to the electrical load and for generating and electrical signal which is applied to the control lead of the electronic switch.

Abstract: In a method and apparatus for regulating the rotational speed of a motor having a rotor with magnetic poles and a stator with at least two coils, wherein during a first operational mode the sinusoidal voltage included in a first of the coils is digitized to produce first and second streams of rectangular pulses, the first pulse stream being compared with a reference frequency pulse signal as regards width and phase to generate accelerating or braking driving pulses supplied to the second coil, the second pulse stream being monitored to determine the rotational speed of the rotor and a second operational mode being instituted whenever the rotor speed falls below a predetermined value, in said second operational mode the rotor speed being accelerated through the application of driving pulses alternately to the first and second coils, the improvement wherein, following the switchover from the self starting mode to the nominial running mode of operation, during a transitional period for a specified time interval,

Abstract: A method and an apparatus for controlling and regulating an electrical motor, especially a reactive motor for time-keeping devices such as clocks. The motor has a permanent-magnetic rotor with at least two poles, and a stator with at least two coils. In a normal speed mode one of coils is supplied with driving pulses whereas the second coil senses the rotational speed of the rotor. If the rotational speed of the rotor falls below a predetermined value, a self-starting mode is initiated wherein the first and second coils are alternately supplied with driving pulses. In this self-starting mode the frequency of the pulses supplied to the first and second coils is increased until normal speed has been reached wherein the self-starting mode is switched off and the normal speed mode regulation is switched on.

Abstract: A supply circuit for supplying an electrical load with a relatively constant current from a variable voltage input source, the supply circuit including a blocking oscillator including a transformer with primary and secondary windings and a switching transistor, the load terminals of the switching transistor being connected in series with the primary winding across the voltage input source, a resistor-capacitor circuit connected between the secondary winding and a control terminal of the switching transistor, a diode connected between the secondary winding and a first terminal of the electrical load, a voltage feedback connection for applying to a first load terminal of the switching transistor a portion of the secondary winding voltage, and a reference voltage source connected to the control terminal of the switching transistor.

Abstract: A vibrating armature motor, which includes a voltage source, an armature, an electromagnet having at least one exciter coil disposed adjacent the armature, a spring for rotationally biasing the armature, a sensor element for sensing the rotational velocity of the armature and for generating a signal proportional to the sensed velocity, a variable duty cycle pulse generator for generating a stream of triggering pulses, the duty cycle of the triggering pulses being dependent upon the sensor signal, and an electronic switch for controlling the current flow from the voltage source through the exciter coil in response to the triggering pulses.

Abstract: A control circuit for driving an electric motor at a substantially constant speed, the motor including a rotor with at least one pair of permanent magnetic poles and a stator provided with a first and second coil, the control circuit including a control element for supplying energizing pulses to the coils dependent upon a detected rotor speed, the control element having a normal speed mode wherein the rotor speed is detected by the first coil and wherein only the second coil is supplied with energizing pulses at a frequency corresponding to single coil driving and a self-starting mode wherein the energizing pulses are supplied alternately to the first and second coils to accelerate the rotor to a desired speed, the control element including rotor acceleration and braking circuitry operable during the normal speed mode and including a desired frequency pulse generator, an actual frequency pulse generator, a phase comparator for comparing the widths and phases of the desired and actual frequency pulses, and an