133results about How to "Cheap and simple" patented technology

Multiple inventions are included. Also users of an email system are limited in ways including to be able to send only a certain number of emails per day. This can ensure for example that if they spam the system they can be suspended before they can send an economically worthwhile amount of spam.

Being related to end-to-end safety comm area in global mobile comm system, concretely the invention is related to end-to-end speech sound encryption unit and method of anti vocoder compression realized on traditional voice channel of GSM mobile comm system. The encryption unit is composed of encryption module at sending end and decryption module at receiving end. The encryption module at sending end includes compression module in low code rate (CMLCR) 4, an encryption module, orthogonal multicarrier modulation module (OMMM) 6, first carrier wave generator module (CWGM), first key management negotiation module (KMNM) 8, and first sync module. Decryption module at receiving end includes OMMM 14, second CWGM, decryption module, CMLCR 17, KMNM 18, and second sync module. Through GSM speech sound channel, the invention carries out end-to-end speech sound encryption transmission. Advantages are low time delay, high security, and flexible and convenient.

A rear lock of a brassiere comprises a strip of an inelastic textile material, said strip fastened to one end of one of the rear parts of the brassiere and supporting a plurality of series of eyelets disposed on the rear side, said series extending in the lateral direction and being at a distance from one another in the longitudinal direction, wherein each series comprises at least two eyelets that are disposed at a distance from one another in the lateral direction. A flat base member has an inner end that is fastened to the end of the other rear part, an opposite outer end, a front side that at least partially overlaps the rear side of the material piece at the outer end, and a rear side opposite the front side. Corresponding plastic hooks which are generally designed to be complementary to the eyelets and which can be engaged therewith in paired fashion, are fastened to the front side of the member at the outer end thereof in such a way that the hooks can be engaged with the eyelets in alignment therewith and affixed thereto. A laterally extending rigid bar disposed on the base member or designed as a part thereof prevents relative motions of the hook from occurring in the lateral direction and bending of the base member near the hook.

A device for removal of trimmings obtained from cutting of logs of web material by means of a log cutting machine which include a cutting blade for log cutting and a supporting surface downstream of the cutting blade to support cut out rolls. The device for removal of trimmings is disposed downstream of the supporting surface and at least one pair of conveyor belts for conveying the rolls toward an unloading station, the lower conveyor belt having a back-up horizontally movable roller able to move toward or away from the supporting surface thus creating a gap between the supporting surface and the conveyor sufficient for the trimmings to pass through and fall beneath the machine, while the cut out rolls pass form the supporting surface to the conveyor.

A method of determining the position of a rotor of a permanent-magnet motor. The method uses two different schemes to determine the position of the rotor. A first scheme is used when the rotor rotates within a first speed range, by sequentially exciting and freewheeling a winding of the motor, measuring a parameter that depends on the rate of change of current in the winding, and comparing the parameter against a threshold. A second scheme is used when the rotor rotates within a second speed range, by generating a voltage signal that is proportional to the voltage across the winding, generating a further voltage signal that depends on the rate of change of current in the winding, and comparing the two signals.

The present invention provides a motor control device, which realizes desired high-accuracy advanced angle control of brush-less DC motor with simple and low-cost structure. In the motor control device, a phase adjusting circuit is provided, which is composed of a combined circuit of resistances (R1-5) and diodes (D1-4), and processes the speed instruction into voltage similar to fold lien of optimum phase angle control characteristic corresponding to speed of the brush-less DC motor to form phase angle signal, and by adjusting the combination of resistances (R1-5) and diodes (D1-4), the speed instruction is processed into voltage similar to fold lien of optimum phase angle control characteristic corresponding to speed of the brush-less DC motor to form phase angle signal of the voltage corresponding to the optimum phase angle control characteristic, and execute high-accuracy advanced angle control for phase of power supply of the brush-less DC motor according to the phase angle signal.

The invention discloses a liquid container, a liquid delivering device equipped therewith and a liquid delivering method. The liquid container can maintain the filled liquid with high quality, wherein the space is saved for storing liquid and the residual liquid is reduced to the minimal amount when the liquid is discharged. According to the liquid delivering device and the liquid delivering method, the installation and replacement operation of the liquid container is operated conveniently, which is simple in structure and low in cost. Meanwhile, the amount of the residual liquid in the container is largely reduced and the liquid is discharged safely. The liquid container (1) comprises a round-bottomed main body (2) and a supporting platform (3) made of thermoplastic resin with a bending elastic rate of at least 700 MPa. The inner surface of the main body (2) is made of thermoplastic resin of high purity and the supporting platform (3) is equipped with a through part (9). According to the liquid delivering device (20) arranged on the liquid container (1), the end (23a) of a liquid feeding pipe (23) is inserted to the round bottom (6) of the container. The upper end and the lower end of the main body (2) are respectively clamped by a protrusion part (32) and a pressing member (34). When gas with a pressure of 200 kPa is supplied, the liquid in the container is discharged.

The invention provides a hybrid electric vehicle capable of realizing effective utilization and operation of inverters, which includes a motor-generator driven by an engine to generate alternating current, wherein the motor-generator is further configured to start the engine, a motor for driving the vehicle, a diode rectifier to rectify alternating current generated by the motor-generator, an inverter connected to a feed circuit between the diode rectifier and the motor to convert direct current in the feed circuit into alternating current, a power supply connected to a line connecting the diode rectifier with the inverter, a first feed circuit to supply current to the motor to drive the vehicle through the diode rectifier and the inverter in series a second feed circuit to connect the motor-generator with the power supply while bypassing at least the diode rectifier, and an alternating current converter provided in the second feed circuit.

Magnetic fastener pairs with low-profile designs which allow strong magnetic coupling between the constituting magnetic fastening members while also permitting easy intentional separation. Each of the magnetic fasteners includes a magnet receptacle and a permanent magnet made preferably of a strong magnetic alloy. Each magnet member is backed by a ferro-magnetic base of the magnet receptacle of the fastener member and with an exposed coupling surface for strong magnetic coupling while allowing easy intentional separation.

Disclosed is a burst communication system utilizing transient peak energy. A transmitter adopts a simplified expanded binary phase shift keying modulation mode, a receiver comprises a receiving antenna, the receiving antenna is connected with an analog receiver, the analog receiver is connected with an analog-to-digital converter, the analog-to-digital converter is connected with an EBPSK (expanded binary phase shift keying) digital modulator, and the EBPSK digital modulator is connected with a frame processor; the analog receiver comprises a pre-amplifier, the pre-amplifier is connected with a frequency mixer, and the frequency mixer is connected with an intermediate-frequency amplifier; and the EBPSK digital modulator comprises a digital impacting filter, the digital impacting filter is connected with a preprocessor, the preprocessor is connected with a return-to-zero decision device, the return-to-zero decision device is connected with a delay calculation module, both the delay calculation module and the preprocessor are connected to a variable delayer, the variable delayer is connected with an integration decision device, the return-to-zero decision device is further connected with a clock generator, the clock generator is connected to the integration decision device, and a frequency synthesizer is respectively connected to the frequency mixer and the clock generator.

The invention provides a nanometer carbon fiber electrode preparation method, and firstly the method uses the carbon fiber with diameter of not more than 10mum attached with the silver glue and metal thread to pass the capillary, and piercing a segment from the capillary; then, putting the carbon fiber tip piercing from the capillary on the flame to etching to nanometer scale; then, withdrawing the carbon fiber tip into the capillary; in capillary, injecting epoxy resin, making the carbon fiber electrode from the nanometer tip to the link part of carbon fiber and metal thread buried and sealed by epoxy resin; and finally, after epoxy resin solidifying, carefully polishing the front-end of capillary to expose the nanometer tip of carbon fiber, and obtaining nanometer carbon fiber electrode. The invention method is simple, low cost, and the prepared nanometer carbon fiber micro-electrode has the advantages of tightly sealed, easy to update disk electrode surface, strong shaking resistance, and so on.

A battery charger comprising input terminals for connection to an AC source, output terminals for connection to a battery to be charged, and a power factor correction (PFC) circuit connected between the input terminals and the output terminals. The PFC circuit comprises a current control loop for regulating an input current drawn from the AC source. The voltage at the output of the PFC circuit is regulated by the voltage of the battery which is reflected back to the PFC circuit. As a result, the battery charger acts as a current source that outputs an output current at the output terminals, and the waveform of the output current is periodic with a frequency twice that of the input current and a ripple of at least 50%.

The invention relates to a short wave speed change communication system and a multipath estimation and separation method used by the short wave speed change communication system. The short wave speed change communication system comprises a communication terminal A and a communication terminal B which communicate through a short wave channel, wherein the communication terminal A comprises a modulator A and a demodulator A, and the communication terminal B comprises a modulator B, a demodulator B and a multipath estimation and separation module; the multipath estimation and separation module is connected with the modulator B and used for calculating a code element period value required in the multipath separation, sending the code element period value into the modulator B, and finally transmitting the code element period value to the communication terminal A through the short wave channel; and the demodulator B comprises an analog-digital converter, the analog-digital converter is connected with a shock filter, the shock filter is connected with a detection judgment module, and the detection judgment module is connected with a bit synchronization module which is used for outputting an information sequence. According to the short wave speed change communication system and a multipath estimation and separation method used by the short wave speed change communication system, the multipath interference can be separated without complex channel equalization, the transmission efficiency and the demodulation performance are improved, and the cost and the complexity for realizing communication system hardware are reduced.

A method of controlling a brushless motor that includes storing a lookup table of control values, periodically obtaining a speed-adjusted control value, and exciting a phase winding of the motor. The speed-adjusted control value is then used to define the phase and/or length of excitation. Obtaining the speed-adjusted control value includes measuring the speed of the motor, increasing or decreasing a speed-adjust variable in the event that the measured speed is greater or less than a threshold, selecting a control value from the lookup table using the measured speed, and adjusting the selected control value using the speed-adjust variable to obtain the speed-adjusted control value. Additionally, a control system that implements the method, and a motor assembly that incorporates the brushless motor and the control system.

The invention provides an engine starting device which prevents intermittent disconnection with a simple circuit structure without damaging the function of the starting device even in the case of action failure of a short-circuiting switch. The engine starting device includes: a starter switch 5 which is serially connected between a power supply 3 and a starting engine 2; a resistor 6 which is serially connected with a starting engine switch; the short-circuiting switch 7 which makes the resistor be short out; and a timing circuit 8 which controls the on-off of the short-circuiting switch, electrifies the starting engine by the power supply via the starter switch and the resistor through shutting off the starter switch 5 to shut off the short-circuiting switch 7 after a delay period afterthe starter switch is shut off, such that the short-circuiting switch 7 is shut off and the resistor is short out; the contact of the short-circuiting switch 7 is a normally closed contact; before the contact of the starter switch 5 is closed, the contact of the short-circuiting switch 7 is disconnected; and after the contact of the starter switch is closed, the contact of the short-circuiting switch 7 is closed.

The invention relates to an automatic vendor. Commodity housing channels capable of arranging a plurality of commodities at the horizontally inclined state along the fore-and-aft direction into a line and housing the line of the commodities are arranged on upper, lower multi-layers in an inclined commodity shelf rack. Outlets of commodities of each commodity housing channel are arranged on a same vertical line. A first stopping piece is used for keeping the commodity(selling commodity) on the first selling order in a commodity sending-out device adjacent to the outlet of the commodities of each commodity housing channel and comprises an abnormal shaped groove on the back, wherein a locking pin driven by an electromagnetic solenoid slides on the abnormal shaped groove, and the first stopping pieces extends out or retracts relative to the commodity housing channel by the locking pin sliding in the abnormal shaped groove. In the automatic vendor, when the first stopping piece moves to the retreat position, the locking pin is fastened with a clearance groove of the abnormal shaped groove and the first stopping piece is kept on the retreat position, thus the commodity is stably sent out.

A method of determining the position of a rotor of a brushless permanent-magnet motor is provided. The phase winding is freewheeled when a phase current exceeds an upper threshold. The method further includes measuring a parameter that corresponds to either: (i) the magnitude of the phase current during or at the end of freewheeling when the phase winding is freewheeled for the fixed period of time, or (ii) the time interval between the start and end of freewheeling or the start and end of excitation when the phase winding is freewheeled until the phase current falls below the lower threshold. The measured parameter is then used to define a saturation threshold. The phase winding is subsequently excited and freewheeled in the same manner, and the parameter is measured again. The method then compares the measured parameter against the saturation threshold, and determines that the rotor is at a predetermined position.

The object of the invention is a method for installing the hoisting roping of an elevator, in which method the hoisting roping (6) of the elevator is lifted upwards into the elevator hoistway (1) by means of a hoisting device (7). The hoisting roping (6) is lifted upwards into the elevator hoistway (1) in steps such that a) at least one rope of the roping (6) is lifted by pulling it to the height (hi) and the aforementioned at least one rope is fixed to the elevator hoistway or to another fixed structure of the building, b) at least one of the ropes of the roping (6) that is at the height (hi) and was lifted in phase a) is detached, c) at least one rope detached in phase b) is lifted by pulling it to the next height (h2) and the aforementioned at least one rope is fixed to the elevator hoistway (1) or to another fixed structure of the building.

The invention relates to a threading device (1) for the threading of a line through a ring member or the like that comprises a body (2), a rotatable arc-shaped element (14) suspended in the body and having an opening (26), and a line holding means (16) arranged to slide on the arc-shaped element, where the arc-shaped element is adapted to assume a first position with the opening in a first direction and a second position with the opening in a second position, and where the threading device further comprises transfer means (18) adapted to transfer a movement to the outer surface of the arc-shaped element in order to rotate the arc-shaped element between the first and the second position. The advantage of the invention is to provide a threading device that is easy to operate, that can be used by both pushing and pulling and that can be manufactured in a cost-effective way.

The invention discloses a back bolt dry hanging structure of a stone curtain wall and a construction method thereof. The stone curtain wall comprises a stone face plate and back bolt implanting holes formed in one side facing the interior of the stone face plate in a dry hanging state. The back bolt dry hanging structure comprises back bolt bodies. One ends of the back bolt bodies are implanted into the back bolt implanting holes, and the other ends of the back bolt bodies lean out of the back bolt implanting holes and are connected with an adapting mechanism in the dry hanging state. The back bolt dry hanging structure has the characteristics that the back bolt dry hanging structure further comprises stone face plate crazing-preventing reinforcing plates fixed to the inward-facing side of the stone face plate, and back bolt place-giving holes are formed in the stone face plate crazing-preventing reinforcing plates; one ends of the back bolt bodies are locked by back bolt locking nuts matched on the back bolt bodies in a screwed mode; and the other ends of the back bolt bodies lean out of the back bolt place-giving holes are connected with the adapting mechanism. Breakthrough preventing and crazing preventing capacity of the back portion of the stone face plate is strengthened; the requirement of horizontally hanging the downward-facing side of the top of a building gallery is met; the structure is simple and low in cost; and the construction method is simple and convenient to operate, the construction cost is not increased, and the technical effect of the back bolt dry hanging structure can be guaranteed.