9results about "Time-programme switches" patented technology

The utility model discloses an integrated emergency switch, which comprises a shell, a key switch, a timer, an electronic circuit board assembly and an alternating current contactor, the shell comprises an upper shell and a lower shell which are mutually buckled and connected in a combined manner, the key switch and the timer are arranged in the upper shell, and the electronic circuit board assembly is arranged in the lower shell. The electronic circuit board assembly and the alternating current contactor are arranged in the lower shell, the key switch and the timer are respectively and electrically connected with the electronic circuit board assembly, and the electronic circuit board assembly is electrically connected with the alternating current contactor. According to the utility model, the key switch, the timer and the alternating current contactor are integrated in the same switch shell at the same time, mutual linkage control is realized through the electronic circuit board assembly, the arrangement of multiple independent modules in the traditional design is replaced, and the integration level and the use portability are improved.

The application relates to the technical field of time control switches, and discloses a mistaken-touch-preventing time control switch which comprises an upper shell and a lower shell, a button is arranged on the upper shell, a protective cover is rotationally connected to the upper shell, and the protective cover is used for covering the button. The button is covered by the protective cover and protected by the protective cover, so that people cannot directly touch the button, the possibility of mistaken touch of the button by people in daily life is reduced, the time control switch can stably control the on-off time of a circuit, and the time control switch can be normally used.

The utility model provides an anti-arcing washing timer, which is characterized in that a reed group comprises a first reed positioned on the inner side and a second reed positioned on the outer side, both the first reed and the second reed are provided with contacts, a cam is provided with gear teeth, the gear teeth comprise inner gear teeth and outer gear teeth, the first reed is always elastically propped against the inner gear teeth, and the second reed is always elastically propped against the outer gear teeth. The second reed has the trend of always abutting against the outer gear teeth, the inner gear teeth and the outer gear teeth each comprise a tooth back side and a tooth end face, the tooth back side is a curved surface with the radius gradually increased, the tooth end face extends from the tail end of the tooth back side to the center direction of the cam, the radius of the tooth end face changes suddenly, and the contact is switched between the contact state and the disconnection state along with rotation of the cam. In the pair of reed groups of the washing timer, the two reeds can move along with the rotation of the cam, so that the disconnection and contact of the contacts can be quickly completed, the duration of sparks and arcing generated during the contact and disconnection of the contacts is short, the ablation process of the contacts is slowed down, and the service life of the product is prolonged.

The utility model belongs to the field of switch, concretely relates to a time control switch, including casing and circuit board module, and circuit board module includes power supply circuit board and main circuit board and relay, be provided with two first wiring terminal respectively with power supply circuit board is connected in casing, be provided with two second wiring terminal respectively with relay is connected in casing, two second wiring terminal all include wiring frame body and wiring bolt, and the two pins of relay respectively are inserted in the wiring frame body of two second wiring terminal, circuit board module adopts modular structure design, and relay, first wiring terminal, second wiring terminal are integrated on power supply circuit board, thereby the assembly of circuit board module and casing is convenient, is favorable to realize modular assembly, and two second wiring terminal is integrated on the two pins of relay, and the structure design is simpler, and second wiring terminal adopts wiring frame body structure design, and the current -carrying capacity is stronger, can satisfy the use requirement of large current.

The utility model belongs to the technical field of coal mine starter control, and aims to solve the problem that an isolation change-over switch is inconvenient to operate by a single hand during starter operation. The utility model provides a stop button time-delay device of a coal mine explosion-proof vacuum starter. A body is installed between a stop button and a stop button operation device of the starter. The stop button operating device is connected to the tail end of the piston rod, the piston rod movably penetrates through the body, the front end of the piston rod extends to the outer side of the body, the front end of the piston rod is used for pressing down the stop button, an air outlet and an air inlet are formed in the body, a one-way valve is arranged at the air outlet, and an adjusting piece for adjusting the air inflow is arranged at the air inlet; the end portion, close to the stop button, of the piston rod is connected with a first locking piece, and the first locking piece can be engaged with or separated from a second locking piece on the isolation change-over switch. According to the device, the springback delay of the stop button can be realized, and the isolation change-over switch can be operated by two hands after the stop button is pressed down.

A spring configured to be fixed to a housing and nested within a dial that is rotatable about the spring. The dial has a plurality of spaced apart inwardly facing teeth that are adjacent the spring. The spring is configured to facilitate rotation of the dial about the spring. The spring includes a central body having at least one anchor configured to connect the spring to the housing. The spring also includes at least one arm having a first end connected to the central body. The spring also includes a second end of the arm that is connected to a bulb. The bulb can be enclosed and include an exterior surface with a node that is on distal from the central body. The node is sized to fit in a space between adjacent teeth. The enclosed bulb biases the node toward the spaces between the teeth.

The invention relates to a laboratory device with a flammable refrigerant and to a method for operating such a laboratory device and to a method for manufacturing such a laboratory device. The laboratory device with a flammable refrigerant provided by the invention has an electrical connection for providing electrical energy for the laboratory device, an electrical switching device, a sequence controller and a monitoring device for monitoring the electrical switching device. The invention improves the operating safety of a refrigerated laboratory device with a flammable refrigerant, at least temporarily avoids and preferably excludes the formation of ignition sparks within the device which can ignite the flammable refrigerant, at least in critical operating phases.

The invention relates to the technical field of operating switches, in particular to a generator circuit breaker disconnecting switch operating mechanism and control system, comprising: a cam wheel body, the lower end face of which is connected with a turbine of the operating mechanism for rotation; the convex blocks comprise a first convex block arranged on the side circumferential surface of the cam body and a second convex block arranged on the side circumferential surface of the cam body and connected with the first convex block, and step grooves are formed in the end faces, away from each other, of the first convex block and the second convex block and used for sequentially pressing a plurality of travel switches of the operating mechanism under rotation of the cam body. The change amount of original equipment is small, only the cam is transformed, and the contactor and the time relay are replaced, so that the operation is simple, and the field change workload is small; a control system, a clutch module and a motor power supply loop in a generator circuit breaker isolation switch control system can be effectively optimized, and the situation that a travel switch S5 / S6 directly cuts off large inductive current is effectively avoided.

A system and method for operating a vacuum interrupter in a self-resetting interrupter. The method includes detecting fault current, opening the vacuum interrupter a first time using power harvested from the current transformer when the fault current is detected, and storing a polarity of the detected fault current when the vacuum interrupter is opened. The method then determines a close time to close the vacuum interrupter so that the current has the same polarity that was stored when the vacuum interrupter was opened and that actuation of closing the vacuum interrupter ends at a current zero crossing, closes the vacuum interrupter at the close time, and opens the vacuum interrupter a second time after the vacuum interrupter is closed using power harvested from the current transformer.