Abstract: A control panel assembly of a microwave oven which is easy to use, including: a front panel section having first and second cooking mode single-functional buttons comprised of a plurality of single-functional buttons for first and second cooking modes of the microwave oven, and a slot formed on the middle portion of the front panel section between the first and second cooking mode single-functional buttons; a movable switch disposed on the front panel section which is moved laterally along the slot of the front panel section; and a mode shifting switch for shifting cooking modes to the first and second cooking modes by the movement of the movable switch, wherein the first and second cooking modes are automatically selected by the movement of the movable switch, and the cooking mode single-functional button of the selected mode is exposed outward for pressing by a user. Accordingly, by simply moving the movable switch in a lateral direction, the cooking modes of the microwave oven are automatically selected.

Abstract: Disclosed is a control panel of a microwave oven comprising a panel body, a timing device, a time control knob, and a power control knob assembly. The power control knob assembly has a pinion assembled with the power control shaft, a rack engaged with the pinion, and a knob installed slidably along a guiding recess formed on the panel body so as to move the rack linearly. As the knob is slide along the guide recess of the panel body of tie panel, the rack moved by the knob rotates the pinion. Accordingly, the output control shaft is rotated, and thereby the output power degree of the microwave is set. As described, knob of the power control knob assembly for controlling the output power of the microwave is linearly moved. Accordingly, the user can easily distinguish the power control knob from the time control knob.

Abstract: An electronic control timer of microwave oven capable of establishing a total cooking period by different time units is disclosed. The electronic control timer includes a gear having a first gear segment and a second gear segment. A switch installed adjacently to the gear generates a pulse signal in accordance with a rotation displacement of the gear. The gear driving device is activated when the switch is activated, and then rotates the gear in an opposite direction to an initial rotating directioon of the gear and returns the gear to an initial state thereof. The first gear segment includes a first gear teeth having a first gear pitch corresponding to a first time unit and a second gear teeth having a second gear pitch corresponding to a second time unit. The second gear segment has a toothless shape. The switch is activated when it is brought into contact with the first gear segment so that the switch generates the pulse signal.

Abstract: Disclosed is an operational switch for a microwave oven using a pair of gears and a pair of micro switches in order for a magnetron and a heater of a microwave oven to operate. At the rear surface of a control panel, a first switch for turning on/off the magnetron and a first gear having a pair of pushing pieces for controlling the first switch are installed. At an edge of the first gear a second switch for controlling the heater is provided. A second gear for controlling the second switch is provided while meshing together with a power controlling gear of a timer body. A pair of pushing pieces are protrudingly formed on the surface of second gear. The first gear further includes a stopper and a pair of impeding pieces for limiting the rotation range and a pair of elastic pieces and a ring type guiding member for guiding the rotation.

Abstract: A timing apparatus including a timer, a solenoid, a toggle switch, and an adapter plate for mounting to the valve control knob of a pizza oven, the adapter plate being provided with a detent at a given point on the periphery thereof. The knob is spring biased in a rotational direction toward the "on" position on the knob. An electrical timer is provided to energize a solenoid at a preset time duration, with the solenoid rod being physically coupled to a pivotable actuating arm, the free end of which is positioned for engagement with the detent of the knob with the knob in the "off" position, the plate being retained at that position against the force of the coil spring. A toggle switch is in electrical circuit relation with the timer, with the toggle thereof physically positioned in operative relation a member projecting from the actuating arm, such that actuation of the toggle from a first position to the second under force of the projection deenergizes the circuit between the timer and the solenoid.

Abstract: Disclosed is a microwave power controlling device having a reduced production cost and an improved assembling work efficiency by using a simple structure and the reduced number of components. A supporting stepped portion is formed on an inner surface portion of a control panel having a rotating through hole formed at a central portion thereof into which a knob axis for controlling the microwave power is inserted. An elastic piece and a pair of stoppers are formed on an upper surface of the supporting stepped portion. On an opposite surface of the supporting stepped portion, a microwave power controlling gear is mounted. The microwave power controlling gear has an engaging jaw for defining a rotating range thereof and a ring-shaped guide portion having plural notched grooves engaged with the elastic piece. The microwave power controlling gear is meshed with a coupling gear meshed with a microwave power controlling circuit gear of a timer body.

Abstract: A uni-direction rotation device in a cam-operated timer is accomplished by coupling the timer control shaft to the camstack with a semi-circular tang and semi-circular slot connection. When the timer control knob is rotated in the biased or right direction, the slot is coupled to the tang, and the timer can be set. But when the timer control knob is rotated in the unbaised or wrong direction, the slot is uncoupled from the tang and the timer control knob rotates freely, so the timer cannot be set.

Abstract: A defrosting unit with a timer, wherein the unit includes a round drum shaped wheel 5 for cooking function, a lobed wheel 6 for defrosting having a peripheral shape so as to produce periodic on/off contacts in cycles with a switch 8, both wheels being mounted on the shaft 2 of the timer 1 and on the shaft 4 of the knob 7, a joint 3 joining the knob shaft with the timer shaft in such a way as to move the shafts in a back and forth movement for a distance (S) of stroke, and the sensitive switch 8 operating on/off in association with the wheels moved with shafts.

Abstract: Control device for microwave ovens comprising a timer whose movement (1) drives a periodic actuating mechanism of the actuator (2) of a switch (3), mounted in the electric supply circuit of the oven, as well as a selector (4) of operating modes manipulable by the user and adapted to influence the actuation mechanism so as to modify the open and closed periods of the switch (3) so as to obtain different modes of cooking. The periodic actuation mechanism comprises an actuator (5) which is movably mounted against a spring (6) with reciprocatory movement and which carries a cam (7) adapted to act on the actuator (2) of the switch (3). A cylinder (8) is driven in rotation by the timer and is slidably axially along its axle (9) of rotation by a transmitter (10) in contact with the mode selector (4). A toothed region (11) carried by the actuator (5) temporarily engages at least one toothed region (12) on the side surface of the cylinder (8).

Abstract: A timer comprising a time body which has an operating shaft capable of angularly rotating around an axis thereof from an original position, and outputs a continuous electrical signal only for a period of time during which the operating shaft returns from a desired angular position to the original position after the operating shaft has been rotated from the original position to the desired angular position, a knob provided at one end of the operating shaft, a push button capable of being pressed to a predetermined distance, and driving device for rotating the operating shaft from the original position by an angle corresonding to a distance to which the push button is pressed.

Abstract: The present invention relates to a device for power control to the magnetron in a microwave oven. The two timer switches conventionally used for controlling the power to the magnetron may be replaced by a configuration in which only one timer switch is used. The timer switch formerly used for switching between high power mode and low power mode is replaced by a microswitch with accompanying driving mechanism. The microswitch is controlled through action of a continuous pressing element, cam, and a band spring so that the cooking modes can be switched between high and low power mode in a manner equivalent to that of known timer switches.

Abstract: An improved automatic shut-off appliance timer is disclosed which actuates an associated appliance at a set-time and deactuates it a fixed period of time later. The timer comprises a clockwork mechanism, including a cam wheel and a trip wheel which approach one another when the set-time is reached. The relative position of the two wheels is set to define the set-time. When the set-time is reached, a cam follower resting on one of the cam wheel and trip wheel is permitted to move axially, moving a switch shaft and allowing electrical contacts to abut, closing the circuit of the associated appliance. Thereafter, a sector gear also comprised by the switch shaft is engaged by the motor, positively rotating the switch shaft. A cam follower integrally carried by the switch shaft then moves along a drop-off cam formed integrally with the front plate of the timer.

Abstract: A programmer timer for an appliance, such as microwave cooking oven, having a magnetron power switch positioned by a control selectively moved to one of three power level settings by user rotation of the single rotary knob to a selected position on one of three separate cooking program interval range scales on the dial. Selection of a knob position on the first scale provides a 100% magnetron duty cycle, or full "ON", cooking mode for the desired cooking interval, selection of a knob position on the second scale provides a first predetermined fractional duty cycle for "MEDIUM" power level magnetron operation for the desired cooking interval; and, selection of a knob position on the third scale provides a second predetermined fractional duty cycle for "LOW" or "DEFROST" power level magnetron operation for the desired cooking program interval. A single timing motor drives a cam advance mechanism for effecting time-out of the selected program interval for the three power levels of operation.

Abstract: The electric power control switch of the present invention includes a plurality of contact assemblies which are repeatedly opened and closed by a motor driven timing cam and two manually operated control cams. The control cams also control the position of associated operating levers which cooperate with additional plural contact assemblies. The relationship of the motor driven timing cam, manually operated control cams and operating levers provides an unique switching arrangement whereby the period for operation of an oven, range or other electrical appliance is widely varied and switch contact life is enhanced.

Abstract: A push button member (10) is mounted to be moved longitudinally between a first position (FIG. 1A) and a second position (FIG. 1B). The push button member includes a cam surface (16) for selectively camming an electrical contact engaging surface (18) and a hold surface (48) past a follower member (32) as the push button member is moved from the first position to the second position. In the second position, the electrical contact engaging surface urges electrical leaf spring contacts (20) into a closed conducting relationship. The spring contacts remain in the conducting relationship until a radially greater extending cam surface (52) of a timing cam (50) engages the follower member moving it to the release position. In the release position, a spring (12) biases the push button member from the second position back to the first position allowing the electrical contacts to open.

Abstract: By intermittently starting and stopping a timer motor of a timer which is a heating time setting device by means of an intermittent switch to turn on and off the power source, two speeds are obtained, and one timer may be used to set both a long time and a short time, and moreover when the timer is set for a long time, the input of heating means is also connected and disconnected so as to obtain a heating output which makes possible simmering or stewing.

Abstract: A control panel is provided for a household appliance which includes a clock-timer lens which is effectively sealed to the rear of the control panel assembly. The integral clock-timer lens and control panel combine to prevent the infiltration of soil into the face of the clock-timer. The assembly is simple to clean without soil particles dropping into the face of the clock-timer.

Abstract: A method of operating a timer device having means for indicating the remaining operating time during an operating time period selected for the timer device. The timer device includes a gear train having a pair of branches coupled with the indicating means to drive it in different preselected speed modes through the selected operating time period. In this method, the indicating means is driven in one of the preselected speed modes through one of the gear train branches during an operating time period in excess of a predetermined operating time period of the timer device with the sum of the excess and predetermined operating time periods comprising the selected operating time period, and the drive of the indicating means through the other of the gear train branches is obviated during the excess operating time period.

Abstract: A cam is axially displaced so that a pair of cam followers sequentially drop from the cam's outer periphery to sequentially close a pair of electrical switches which are responsive to the cam followers. Upon completion of a program, the cam is permitted to displace to its original position. A clip ring clutch is used to provide a two-way manual rotation of a ring which carries a ramp that axially indexes the cam.

Abstract: A switching device for variable speed gears in machine tools having an assembly which includes a plurality of axially disposed, rotatably-driven cam discs, each of which is associated with an electric microswitch. Non-rotatable spacers serve to position the cam discs. A spherical key bed clamp axially clamps the cam discs together while permitting rotation of individual ones thereof. A non-rotating indicating disc displays the present RPM or respective gear stage. A shock absorber in the individual gear trains between switching bars and their respective electric motors provides sufficient damping and cushioning to prevent a hard start-up impact when the motor is switched on or when a sliding gear block is engaged. The shock absorber may include an elastic linkage or an elastic spur gear in a toothed wheel gear reduction unit located between the motor drive shaft and the link shaft.

Abstract: A free-floating shorting bar carries electrical contacts at opposed ends thereof. The shorting bar is actuated to open and close mating electrical contacts by a pair of axially indexable shafts in a manner whereby three electrical contact conditions are provided: (1) With both shafts indexed "out" a first set of contacts is closed and a second set is opened; (2) With both shafts indexed "in" the first set is open and the second set closed; and (3) When one shaft is indexed "out" and one "in", both sets of contacts are closed.

Abstract: There is disclosed a timing mechanism utilizing a digital interval timer composed of rotating drum wheels each having a cam to close electrical switches to provide a program sequence. Cam followers are constructed and arranged so that when they drop in notches of the cams the drum wheels can be rotated in either direction.An auxiliary program is provided by a slideable drum shaped helical cam that actuates a cam follower. The drum shaped helical cam is manually axially set to provide a desired program. Both the drum shaped helical cam and the drum wheels are power driven from the same source.The timing mechanism is packaged in a cup shaped housing having individual ribs in its side-walls to receive a frame carrying the drum wheels and the drum shaped helical cam.

Abstract: An electrical switch construction having a stationary frame carrying an electrical switch provided with different operating conditions and an actuator pivotally mounted directly in the frame and operatively associated with the switch for operating the switch to the different conditions thereof in accordance with the pivot position of the actuator about its pivot point in the frame. A timer member is operatively associated with the actuator for repetitively pivoting the actuator about its pivot point to cause the switch to be repetitively in one condition thereof a certain percentage of a certain increment of time and for being in another condition thereof for the remainder of the certain increment of time. An adjustable member is operatively associated with the actuator for changing the pivot point thereof in the frame and in relation to the switch and thereby selecting the amount of the certain percentage of the certain increment of time within certain limits.

Abstract: A cam is axially displaced so that a pair of cam followers sequentially drop from the cam's outer periphery to sequentially close a pair of electrical switches which are responsive to the cam followers. Upon completion of a program, the cam is permitted to displace to its original position. A coil spring clutch permits an actuator to be located in a predetermined position for axial displacement of the cam.

Abstract: A periodical switching device has adjustable periodic ON durations and has rapid on, off transitions. A swinging member rides on a rotating cam. An operation member controlled by the cam and by the swinging member turns a switch on when the cam moves the operation member and turns the switch off when the cam moves the swinging member to release the operation member. An adjusting member changes position of the swinging member to vary its point and time of initial contact with the cam to selectively control release of the operation member which turns OFF the switch. A feeding device advances the adjusting means to 100 percent conduction when the adjusting device is moved to select about 83 percent or more conduction. An old setting-clearing device moves the operation member relatively to the swinging member so that the members follow the newly set durations immediately upon beginning new cycles.

Abstract: A timer controlled control system for an apparatus having two controlled devices and a timer construction operatively associated with the devices to operate the same, the timer construction having a single timer provided with a pair of selectors respectively operatively associated with the devices and each selector being adapted for selecting the total time period the timer is to operate both of the devices and each selector being adapted for selecting a certain percentage of the selected total time period the timer is to operate its respective device concurrently with the other device, each selector means being manually operable.

Abstract: A control cam plate having a periphery divided into four sections of different radiuses is driven to rotate by a cam motor mounted on a supporting table. The supporting table is rotatably secured in a microwave oven, and one end of the supporting table is fixed to a manually operable selection lever for shifting the location of the control cam plate. A switching means is associated with the control cam plate for controlling a repetition rate of a power supply to a magnetron employed in the microwave oven in response to slide operation of the manually operable selection lever. In a preferred form, a menu drum is provided in such a manner as to rotate in response to the slide operation of the manually operable selection lever, thereby facilitating recognition of cooking modes.

Abstract: A combination microwave oven and electric heating oven comprises a selection lever for selectively performing microwave heating cooking and electric heating cooking. A switching means is associated with the selection lever so as to intermittently energize a timer motor during an electric heating cooking mode, whereby a timer arrangement associated with the timer motor functions as a short interval timer when the combination microwave oven and electric heating oven is placed in a microwave heating cooking mode and the timer arrangement functions as a long interval timer when the combination microwave oven and electric heating oven is placed in the electric heating cooking mode.

Abstract: A washer is adjustably connected to a driving member of a cam assembly and is coupled to a cam means of the cam assembly.

Abstract: An automatic timer switch includes a time-of-day indicating means, a means for determining and indicating the cessation of a timed switching function, and a means for determining and indicating the duration of a timed switching function.

Abstract: Timer suitable for the automatic control of appliances. The timer includes a contact structure which is activated by a rocking lever and two adjustment shafts which move the rocking lever when the shafts are manipulated to set the starting and stopping times of the timer. The rocking lever is maintained in the necessary position for manual operation of the applicance by the cooperation of a locking lever, an ear extending from the rocking lever, and an opening in the plate which supports the rocking lever. The locking lever covers the opening and prevents the penetration of the ear therein when the timer is set for manual operation. With this arrangement, the shafts are free to rotate according to the correct time.

Abstract: An expanded scale timer has means adapted to be driven for indicating the operating time of the timer, and a pair of means are conjointly and relatively movable for respectively driving the indicating means at different predetermined speeds. Means is provided for effecting actuation of the driving means conjointly to drive the indicating means through one of the driving means at one of the speeds and for effecting actuation of the other of the driving means relative to the one driving means to also drive the indicating means at another speed with the one driving means being overridden by the indicating means.

Abstract: A digital cooking hours timer for providing an automatic cooking operation of a cooking apparatus for a selected time period and having a frame provided with a timer unit and a drive mechanism for driving the timer unit. A selector is carried by the frame to set a selected period of cooking time of the timer unit and is adapted to interconnect the drive mechanism with the timer unit so as to cause the drive mechanism to drive the timer unit for only the set period of cooking time, the timer unit having an output for operating the cooking apparatus at least part of the set period of cooking time as the set period of cooking time is elapsing.

Abstract: An alarm clock timer mechanism having a pair of coaxially mounted gear driven cam members with one of the cam members being axially movable to actuate an alarm or other form of control mechanism at a preset alarm time. One of the cam members is provided with a resiliently mounted cam follower which moves axially toward the other cam member at the alarm time. The resilient mounting allows the follower to ride smoothly on a lower surface of the other cam after the alarm time, thus precluding any high torque resetting loads on a timing motor. A manually operable reset mechanism is provided for axially moving the cam members away from each other to move the control mechanism to its off position and to simultaneously reset the resiliently mounted cam follower on an upper surface of the other cam.