Abstract: A power tool including a housing, a motor housed in the housing, and a handle formed on the housing, the handle being provided with a speed regulating mechanism for adjusting the rotational speed of the motor. A speed limiting mechanism cooperates with the speed regulating mechanism. The speed limiting mechanism includes a first knob and a second knob disposed on two sides of the handle. The first knob and the second knob are interlocked with each other to be toggled to limit the motor to operate at a fixed rotational speed.

Abstract: A pack for smoking articles having: an inner container housing a group of smoking articles and provided with an extraction opening for the smoking articles; a closing tab coupled to the inner container in the area of the extraction opening to close the extraction opening, the closing tab being glued to the inner container in a releasable manner; a rigid outer container that houses the inner container; and a cup-shaped lid hinged to the outer container so as to rotate, relative to the outer container, between an opening position and a closing position. The closing tab has: a plastic layer arranged internally, a through opening arranged in the area of the extraction opening, and directly glued to an outer surface of the inner container using re-stick glue; and a paper layer arranged in contact with the plastic layer and more on the outside than the plastic layer.

Abstract: A mounting device and method of mounting an automatic stovetop fire suppressor are provided herein. Stovetop fires are a well-known residential and commercial hazard. Common parts are utilized across the stovetop fire suppressors employed in different stovetop configurations, reducing inventory count. The mount design can be automated for greater efficiency of time and labor and may provide increased production or throughput. A magnet is attached at the factory for the vent hood product, eliminating the need for such assembly by an end user. This attachment also alleviates loss or misplacement of the magnet during unpacking or installation. A threaded insert is staked to the fire suppressor can and affords reliable retention of the magnet to the fires suppressor can. The present designs enables formation of a consistent vent area in the fire suppressor can.

Abstract: A two-level latch mechanism for an operation mechanism of a circuit breaker is provided. The operation mechanism includes: a tripping component, a left side plate, a right side plate, a latch, a half shaft, a lever, and a main shaft. The tripping component, the latch and the lever are mounted between the left side plate and the right side plate. The half shaft and the main shaft penetrate through the left side plate and the right side plate, and extend out of the left side plate and the right side plate. The tripping component, the latch, the half shaft, the lever, and the main shaft move in linkage. The tripping component includes a tripping buckle and a latch surface is disposed on a second end of the tripping buckle. The tripping component, the latch component and the half shaft component form a two-level latch.

Abstract: A power management system that includes a first enclosure and a second enclosure. A first generator is inside the first enclosure and a second generator is inside the second enclosure. The power management system further includes a paralleling enclosure and a paralleling module inside the paralleling enclosure. The paralleling module electrically connects the first generator to the second generator without opening the paralleling enclosure. The first generator includes an engine and an alternator. A first contactor is powered by the alternator to close the first contactor in order to provide an electrically conductive path from the alternator to an output. The second generator includes an engine and an alternator. A second contactor is powered by the alternator to close the contactor in order to provide an electrically conductive path from the alternator to the output.

Abstract: The invention relates to a manual drive for a tap changer for a tap-changing transformer having a locking unit. The locking unit has a catch which can pivot and has different locking means; the catch can be operated from the outside before an intended switching operation. The locking unit offers high a degree as possible of safety against inadvertent or else deliberate incorrect operations of the manual drive.

Abstract: An electric power distribution switch incorporates a stress-relieving connection structure, a closing guiding structure, a weather shield structure and a contact structure.

Abstract: A rotary control device includes a body, a knob rotatably provided on the body, a push button provided on a side portion of the knob so as to be depressed, a lock member that moves in response to a depressing operation of the push button, and a lock portion provided in the body. The lock member is retained to the lock portion of the body so as to restrain a rotary operation of the knob before the push button is depressed. When the push button is depressed, the lock member is moved to a space where the lock member is movable in conjunction with the rotary operation of the knob so that a restraint of the rotary operation of the knob is released.

Abstract: A safety switch is described in which a switching contact in a lock mechanism switches between an open and closed condition. Switching is coupled to a lock member moveable between a locked position, locking a drive cam, and an unlocked position, allowing the cam to rotate. A link member, cooperating with the lock member, switches between open and closed conditions of normally-open and normally-closed switching contacts, indicating movement of the lock member between the locked position and the unlocked position. By monitoring the open and closed conditions of the normally-open and normally-closed switching contacts, it is possible to determine the state of the lock member, i.e., whether it is in the locked position or in the unlocked position. It therefore can be determined whether the drive cam is in the locked or unlocked (i.e., free to rotate) state.

Abstract: A remotely configurable control lever is disclosed for operating an electrical switch on the control panel of an agricultural vehicle. A cam plate 22 rotatable with the control lever has a cam track 23 defining at least one notch, which is selectively engaged by a resiliently biased detent 24 to latch the control lever in a predetermined position. A solenoid 32 is provided for retracting the detent to allow the control lever 10 to return to a neutral position. A second cam track 123 is provided which is rotatable with the control lever 10 and defines at least one stop cooperating with a further retractable detent 124 to limit the range of angular displacement of the control lever 10.

Abstract: An operating mechanism for a rectilinear motion circuit-breaker, for performing an open-close-reopen cycle, and operating on an operating rod of the circuit-breaker and including closing and opening springs. The opening spring operates on the operating rod. The closing spring operates on a crank end whose other end is connected to a shaft fastened to a flywheel and on which is mounted a closing cam cooperating with a roller on the operating rod. A closing pawl retains the closing spring in a compressed position, opening the closing pawl releasing the closing spring to rotate the cam, thereby closing the circuit-breaker and rearming the opening spring. A rearming motor couples to the shaft by a freewheel. A pawl triggers opening retaining the operating rod against force of the opening spring in the closed position of the circuit-breaker and is adapted to receive an opening command.

Abstract: In a circuit breaker, a rotary-operating handle is linked with an opening and closing mechanism via a driving gear so that main circuit contacts can be opened and closed by rotating an opening and closing lever. A vertically moving handle lock lever is arranged between a tip of the opening and closing lever and the driving gear directly coupled to the operating handle, so that when the main circuit contacts are opened after being welded, the lock lever abuts against the driving gear to restrain the operating handle to the vicinity of the ON position, thereby restricting the movement to a contact-open indicating position. Further, an upward-inclined surface is formed in a stopper section located at a tip of the lock lever, so that if the contact welding is not severe, the lock lever can be pushed down to forcibly open the contacts.

Abstract: A switch includes two interacting contacts (1, 2) and a closing spring (5, 11, 15, 21) for moving the contacts into the closed position, an operating button which can be used to initiate a prestressing phase of the closing spring (5, 11, 15, 21), and a locking device (6) for locking the contacts (1, 2) until a predetermined moment at which the influence of the prestressed closing spring (5, 11, 15, 21) is to be released onto the contacts. The locking device (6) is designated to lock the interacting contacts (1, 2), during the prestressing phase, at a contact distance. The contact distance to be locked being less than the contact distance in the open position of the contacts (1, 2).

Abstract: A process for upgrading a hydrocarbon oil is provided which comprises introducing the oil and an aromatic extraction solvent containing 0.1 to 10 vol % water into an extraction zone for contact of the oil and solvent therein whereby an extract solution is formed; and injecting water into the extraction zone at a point below that at which the extraction solvent is introduced. The injected water is injected substantially countercurrent to the extraction solvent at a velocity of about 0.5 to 3 ft/sec in an amount ranging from about 0.1 to about 10 LV% based on the amount of extract solution being processed.

Abstract: A push-button switch including a sliding member, a lock pin for locking the sliding member at a certain location, a heart cam including a lock cam along which the lock pin slides, and a movable stopper member, disposed at the heart cam, for holding the lock pin in a lock position as a result of cooperating with the lock cam or for unlocking the lock pin. The push-button switch incorporates a self-restoring function, wherein friction between the lock pin and the lock cam during an auto-off state is reduced to decrease the amount of force required to unlock the lock pin, thereby reducing the solenoid actuating current, and simplifying the actuating structure, as a result of which a more reliable product with a longer life and a smaller size can be produced.

Abstract: Electrical switching apparatus such as a power circuit breaker, network protector or switch has a self-supporting operating mechanism module including a cage formed by a pair of side plates rigidly clamped in spaced relation by spacers. The cage supports all of the operating mechanism components including a helical compression close spring mounted fully between the side plates and coupled to a cam member through a rocker in a manner which maintains the forces longitudinal to the spring. The cam member has a charging cam with a charge profile for compressing the close spring and a close profile through which the spring drives the cam member to effect a controlled release of stored energy to close the contacts of the apparatus. A close prop, spring biased to an unlatched position, is latched to secure the close spring in the charged state by a latch assembly reset by a reset lever separate from the close prop which in turn is reset by rotation of the cam member during charging.

Abstract: An actuator for the rapid connection and disconnection of a switch (10) has a primary shaft (12) , which can be rotated to and fro between a first end setting (18) and a second end setting (18') and possesses a tension lever (16). Seated in a rotationally secure manner on a delivery shaft (14) parallel to the primary shaft (12) is the drive shaft (22), which can be rotated, under the force of the spring-loading arrangement (26), from the disconnect setting (24) into the connect setting (24') and back. The spring-loading arrangement (26) includes a helical spring (28), which acts as a pre-tensioned compression spring and is supported by its spring ends (36, 36') on a respective butt strap (32, 34), which butt straps in turn interact, via driving stops (52, 54, 56, 58), with the tension lever (16) and the drive lever (22).

Abstract: A force-storing actuator for connection to a rotor of a step transformer has a central upright axle connected to the rotor and rotatable about its axis, and upper and lower input wheels fixed rotationally to each other and rotatable on the shaft about the axis. Respective upper and lower drive elements fixed underneath and atop the input wheels flank upper and lower force-storing levers rotatable on the shaft between the input wheels and juxtaposed with the input wheels. Each lever is angularly engageable with the respective drive element. A spring has outer ends connected to the two levers offset from the axis. An output wheel fixed on the shaft above the upper input wheel carries an output element fixed on the shaft axially between the levers and engageable angularly with both of the levers.

Abstract: A compact load break switch having at least one vacuum interrupter connected between two terminals carried by respective insulating bushings through a current exchange assembly. The vacuum interrupter is disposed within one of the insulating bushings, and a current exchange insulating housing having portions which extend telescopically into both insulating bushings, provides adequate creepage distance through air from the vacuum interrupter and the current exchange assembly to a grounded housing for the load break switch. Also, a current transformer is disposed about the insulating housing to provide remote indication of the flow of fault current through the current exchange assembly.

Abstract: An isolation switch has at least one first cam attached to a blade of the isolation switch, the first cam arranged to rotate about a first axis. At least one second cam is arranged to rotate about a second axis. The first and second cams engage so that rotation of the second cam in a first rotational sense urges rotation of the first cam so as to engage the blade with a fixed contact, thereby closing the isolation switch. The first cam, when under the influence of electromagnetic forces resulting from current flow through the isolation switch tending to open the isolation switch, urges rotation of the second cam in the first rotational sense.

Abstract: A safety switch comprising a drive and locking device. A key is used to operate the drive. The drive comprises a ram longitudinally moved by the key. The locking device includes a blocking member for the ram which can only be released by the key.

Abstract: A switch actuator mechanism including a slider which can execute movement in steps along a linear track, the step-wise movement being governed by the interaction of a pair of cam-followers, carried by the slider, with respective cam-surfaces disposed alongside the track, one to either side thereof. The cam-followers are resiliently urged into contact with their respective cam surfaces and permit the slider to assume, alternately, stable and unstable conditions at locations disposed in series along the track.

Abstract: Apparatus for preventing two switches from being simultaneously closed. A pair of rollers are each movable in, and between the ends of, respective curved tracks. The rollers are each linked to a respective switch so that when its switch is closed, each roller is at the bottom of its track, and when its switch is open, each roller is at the top of its track. Each switch cannot operate if its roller cannot move. A yoke maintains the rollers a fixed distance apart so that each roller may be at the top of its track, one roller may be at the top of its track while the other roller is at the bottom of its track, and vice versa, but one roller cannot move away from the top of its track if the other roller is not at the top of its track and vice versa. If one switch attempts to close while the other switch is closed, the roller of the closed switch is pulled into a detent at the bottom of its track; the roller remains in the detent as long as the other switch attempts closure.

Abstract: A circuit breaker having separable contacts and a releasable trip mechanism operable upon overcurrent conditions to automatically separate the contacts includes a moveable arm stop connected to the releasable mechanism for limiting travel of the moveable contact in the open circuit position. The moveable arm stop includes a cam portion having an extended surface to limit travel of the moveable contact and establish a first contact separation distance when the trip mechanism is latched, and a flat surface limiting travel of the moveable contact to establish a second, greater contact separation distance when the trip mechanism is released.

Abstract: A pushbutton contactor has means for transforming the contacting function into a locking function or vice versa in which detent means are provided on the actuating member which cooperate with cam surfaces in the guide cylinder of the pushbutton contactor. Different cam surfaces in a guide cylinder are offset from each other and can be brought into operative connection with the detent means. By simple displacement of the actuating member, the function of the pushbutton contact can be changed from a locking to an intermittent contact or vice versa.

Abstract: An alarm switch includes a hollow casing having a keyhole and a finger opening formed therein, at least one electrical switch mounted in the casing having a spring-loaded actuation pin, a reversible cam pivotably mounted in the casing for movement between a first position, in which it is held in biased engagement with the switch pin so as to maintain the pin in a retracted biased state, and a second release position, in which it is disposed in a substantially non-engaging position with said pin so as to permit extension of said pin and triggering of an alarm signal by the electrical switch, a block slidably mounted in the casing having at least one latch lug which, in a first position of the block, maintains the cam in biased engagement with the switch pin and, in a second position of the block, releases the cam to permit movement to its release position so as to thereby activate the alarm.

Abstract: A circuit breaker includes a lever which is connected to a spring mechanism at one point between both ends of the lever; a movable contact connected to one end of the lever; a stationary contact placed to face the movable contact; a fitting mechanism which is formed on the lever at a position of the movable contact side from the position connecting to the spring mechanism; and a ratchet mechanism which fits to the fitting mechanism so as to fit said lever at the position when the other end of the lever is shifted to a predetermined position against the force actuating the spring mechanism.

Abstract: A push button mechanism includes a housing (1) including a push button control key (2) and microswitches (4) actuated by pushing the key. There are two common modes of push button operation: either a non-locking operation in which the position of the switch contacts corresponds to the position of the key; or a locking operation in which pushing the key changes the position of the switch which then remains in the new position after the key is released. From the manufacturing point of view it is desireable to provide a single mechanism which can act in either mode depending on the position of a selection component (7). From the user's point of view it may be advantageous to be able to change the mode of a switch which is already installed and wired. The present invention provides an operating key which may be withdrawn from the mechanism through the end face of the housing. The key carries a selection finger (7) for actuating a locking mechanism (8).

Abstract: A push button adapter has a housing with an open bottom mounted on top of a slide switch, with the actuating button of the switch extending up into the housing. Slidably mounted in the housing and extending out of one end of it is a push button plunger with a recess therein loosely receiving the actuating button for moving it with the plunger. A coil spring normally holds the plunger in its outermost position with the button at one end of its travel, the plunger being movable into the housing far enough to move the button to its other position.

Abstract: A multi-function electrical switch assembly has body sections defining therebetween a chamber containing spaced fixed electrical contacts and spaced moveable electrical contacts carried by a plunger member which is resiliently restrained from moving the moveable contacts toward the fixed electrical contacts; a second set of electrical terminals are defined by a fixed terminal connected to a moveable deflectable arm carrying a first contact which, upon such arm being sufficiently deflected by the plunger, engages a cooperating second fixed contact.

Abstract: A push-to-turn knob design for a rotary switch to prevent accidental actuation of the switch by requiring a two-step operation sequence. This operating function is obtained without modifying the design of the rotary switch. Hence, a standard rotary switch can be easily converted to a push-to-turn operating sequence.