Abstract: A motion guide device includes a ball nut attached onto a shaft and having helical grooves for receiving ball bearing elements, and a ball coupler including a flexible coupling member having a number of openings formed between spacers for receiving ball bearing elements, the ball bearing element is contacted with the ball nut at a contact point which is spaced from the inner peripheral surface of the ball nut for a spacing distance, and the ball bearing element is contacted with the screw shaft at a contact point which is spaced from the outer peripheral surface of the screw shaft for a spacing distance that is preferably smaller than the spacing distance between the contact point of the ball bearing element and the ball nut.

Abstract: An electrostatic discharge protection device for protecting an inner circuit, which is operated in a source voltage, is provided and includes a protection unit and a control unit. The protection unit provides a discharge path for transmitting an electrostatic signal from a pad to a ground line. According to a voltage level at a control end, the protection unit adjusts a holding voltage and a triggering voltage determining whether to conduct the discharge path. When the source voltage is supplied, the control unit transmits the input voltage to the control end of the protection unit, so as to raise the holding and the triggering voltages of the discharge path. When the source voltage is not supplied, the control unit switches the control end of the protection unit to a floating condition by the electrostatic signal, so as to lower the holding and the triggering voltages of the discharge path.

Abstract: A light emitting bulb, a luminary and an illumination device are provided. The light emitting bulb includes a main body and a bulb base. The main body has a plurality of the light emitting units. The bulb base has a plurality of flexible pieces. The flexible pieces are connected to the light emitting units respectively to form a plurality of electrical transmission paths. The luminary further has a lamp holder for holding the light emitting bulb. A control unit in the illumination device is connected to the light emitting bulb through the lamp holder for selectively providing a supply of a power to the light emitting units to control brightness of light emitting units, respectively. The light emitting bulb may facilitate color changing and brightness control without having a control circuit disposed within the light emitting bulb and is associated with a longer lifetime and a lower manufacturing cost.

Abstract: Systems and methods for rig assembly and for erecting a mast of a rig and such systems with roller apparatus to facilitate movement of a mast section from a mover. In a first embodiment, the method includes erecting a rig mast section on a substructure, the substructure including a first substructure box spaced-apart from a second substructure box, the first substructure box comprising a first upper box above a first lower box and the second substructure box comprising a second upper box above a second lower box.

Abstract: Implementation of opportunistic use of stations in a wireless network as repeaters is described. In one implementation, a station detects the existence of rate anomaly in a wireless network. In response to the rate anomaly, the station may transform into a software repeater for certain other neighboring stations. The repeater function allows for the relaying of packets sent by these neighboring stations to the access point and vice versa. The other neighboring stations, owing to their relative proximity to the repeater station, transmit data at a higher rate to the repeater station. Thus, the removal of the slower stations reduces clogging of the access point and increases the overall data rate within the wireless network. Further, a zero-overhead network coding protocol may be implemented in conjunction with the repeater function to increase capacity of the wireless network.

Abstract: A chain type transmission assembly doesn't have the problem that the chain interferes with the transmission assembly, the thickness of the links of the chain of the transmission assembly is precisely calculated by an equation, so that the chain can be prevented from interfering with the outer surface of the screw, thus substantially improving the efficiency and service life of the transmission assembly.

Abstract: A ball screw with a buffering circulation member comprises: a screw, a nut, a circulation member, a plurality of rolling elements and a plurality of flexible members. The circulation member comprises a first structure and a second structure. The flexible members are disposed at the combining portion between the circulation member and the nut to allow the first and second structures to be assembled more closely in a seamless manner. The flexible members which support the circulation member can absorb or buffer the collision of the rolling elements, thus reducing the vibration of the rolling elements or the noise caused by the collision of the rolling elements.

Abstract: A ball screw device includes a screw engaged into a nut member for forming an endless ball guiding passage and for receiving a number of ball bearing members, a ball return device includes a U-shaped structure having a central carrying member and a protrusion extended out from each end for engaging into the nut member and for increasing the curvature of the ball return pathway of the ball return device, and a return device holder engaged with the protrusions of the ball return device for retaining the ball return device to the nut member and for preventing the ball return device from moving laterally relative to the nut member and for suitably guiding the ball bearing members to smoothly move through the endless ball guiding passages of the ball screw device.

Abstract: A motion transmission apparatus with a chain, wherein the chain comprises a plurality of spacers and two links two links at both sides of the respective spacers for connecting spacers together. The spacers are equidistantly spaced from one another by a receiving space which is longitudinally asymmetrical and provided for holding rolling elements.

Abstract: An LED module includes a first dielectric layer, and a first patterned conductive layer having first, second, and third die-bonding pads. Each die-bonding pad includes a pad body having a die-bonding area, and an extension extended from the pad body. The extension of the first die-bonding pad extends in proximity to the die-bonding area of the second die-bonding pad. The extension of the second die-bonding pad extends in proximity to the die-bonding area of the third die-bonding pad. A second dielectric layer disposed on the first patterned conductive layer includes three dielectric members corresponding respectively to the die-bonding pads of the first patterned conductive layer. Each dielectric member includes a chip-receiving hole exposing the die-bonding area of a respective die-bonding pad for attachment of an LED chip thereto, and a wire-passage hole spaced apart from the chip-receiving hole to expose partially the first patterned conductive layer for bonding a wire.

Abstract: A ball screw device includes a screw engaged into a nut member for forming an endless ball guiding passage between the nut member and the screw and for receiving a number of ball bearing members, the nut member includes two orifices aligned with the helical grooves of the nut member and an axial ball return channel communicating with the orifices of the nut member, a deflecting device includes two deflecting members engaged into the orifices of the nut member and each having a ball deflecting channel communicating with the helical grooves and the axial ball return channel of the nut member for increasing the strength and the working life of the deflecting device.

Abstract: Methods and systems for installing a drawworks on a drilling rig, the method, in certain aspects, including moving a drawworks on movement apparatus on the ground adjacent a drill floor of a rig, connecting the drawworks to the drill floor, moving the movement apparatus away from the rig, and raising the drill floor with the drawworks thereon using raising apparatus of a rig substructure supporting the drill floor. This abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 C.F.R. 1.72(b).

Abstract: Implementation of opportunistic use of stations in a wireless network as repeaters is described. In one implementation, a station detects the existence of rate anomaly in a wireless network. In response to the rate anomaly, the station may transform into a software repeater for certain other neighboring stations. The repeater function allows for the relaying of packets sent by these neighboring stations to the access point and vice versa. The other neighboring stations, owing to their relative proximity to the repeater station, transmit data at a higher rate to the repeater station. Thus, the removal of the slower stations reduces clogging of the access point and increases the overall data rate within the wireless network. Further, a zero-overhead network coding protocol may be implemented in conjunction with the repeater function to increase capacity of the wireless network.

Abstract: A motion transmission apparatus with a chain, wherein the chain comprises a plurality of spacers and links for connecting the spacers together, each of the spacers is provided at both sides thereof in an axial direction of an elongated shaft with a plurality of holding protrusions and inclined at an angle from a center of each of the spacers toward a peripheral edge thereof in such a manner that a distance between outer ends of two opposite holding surfaces on two neighboring spacers is smaller than a diameter of the rolling elements, the holding protrusions of the chain are annularly arranged in 120 degree intervals in such a manner that the holding protrusions on the same side of each spacer are alternatively arranged in a direction which is vertical to the links, and two of the holding protrusions are arranged in a line parallel to a direction of the links.

Abstract: An RC delay circuit for providing electrostatic discharge (ESD) protection is described. The circuit employs an NMOS transistor and a PMOS transistor to produce a large effective resistance using a relatively small circuit layout area.

Abstract: An LED module includes at least two LED package units and at least one connecting unit. Each LED package unit includes at least one first engaging portion, at least one first conductive portion, and at least one LED chip connected electrically to the first engaging portion. The connecting unit includes at least two second engaging portions, and at least one second conductive portion having two opposite end sections extending respectively to the second engaging portions. When the second engaging portions of the connecting unit engaged with the first engaging portions of the LED package units, respectively, the end sections of the second conductive portion contact electrically and respectively the corresponding first conductive portions so as to connect electrically the LED chips of the LED package units.

Abstract: An electrostatic discharge tolerant device includes a semiconductor body having a first conductivity type, and a pad. A surrounding well having a second conductivity type is laid out in a ring to surround an area for an electrostatic discharge circuit in the semiconductor body. The surrounding well is relatively deep, and in addition to defining the area for the electrostatic discharge circuit, provides the first terminal of a diode formed with the semiconductor body. Within the area surrounded by the surrounding well, a diode coupled to the pad and a transistor coupled to the voltage reference are connected in series and form a parasitic device in the semiconductor body.

Abstract: An apparatus for cutting foil strip from a spool includes a holding device, a pulling unit, a cutting unit, a brake unit, a detection unit, and a controller. The supporting is configured for receiving the spool. The pulling unit, the cutting unit, the brake unit are fixed on the holding device. The pulling unit is configured for pulling the foil apart from the spool to the cutting unit. The cutting unit is configured for cutting the foil into pieces. The brake unit is mechanically coupled to the reel and configured for applying a resistance to the spool. The detection unit is mechanically connected with to the reel and configured for sensing the rotation number of the spool. The controller is electronically connected to the sensor and the brake unit and configured for controlling the resistance the brake unit applying to the spool according signal of the detection unit.

Abstract: A motion guide device includes a ball nut attached onto a shaft and having helical grooves for receiving ball bearing elements, a ball circulating member is engaged with the ball nut and includes a ball circulating channel communicative with the helical groove of the ball nut, and includes an intermediate segment and two end segments, a ball coupler includes two flexible coupling members for engaging with the ball bearing elements, and the ball circulating member includes two opposite guide pathways for receiving the flexible coupling members of the ball coupler, and curved relative to the ball circulating member for an angle ranged between 160-220 or 175-185 degrees, such as 180 degrees for smoothly guiding the flexible coupling members to move through the ball circulating member.

Abstract: An electronic device and hypnosis method includes setting a hypnosis volume level and a playing duration of the electronic device. An audio file is played in response to the electronic device being activated, and a brain wave frequency of a user is determined. The electronic device and hypnosis method further includes analyzing the brain wave frequency to determine if the user is in a sleeping state, and playing the audio file for the playing duration at the hypnosis volume level.