Abstract: A multi-mode one-way wrench includes a head, a toothed wheel, a leading pawl, at least one following pawl and a switch. The head includes cutouts in communication with a chamber. The toothed wheel rests in the chamber and includes teeth. The pawls are movably rest in the cutouts and adapted for alternate engagement with the toothed wheel. The following pawl includes a stem. The switch rests on the head and made with at least one arched groove for receiving and guiding the stem to move the following pawl between a first mode for engagement with the toothed wheel and a second mode kept from the toothed wheel. The cutouts are biased from one another by an angle of 360°×(M+1/L)÷N, wherein L is an integer for representing the number of the cutouts, M is any proper integer, and N is an integer for representing the number of the teeth.

Abstract: A multi-mode one-way wrench includes a handle, a toothed wheel, two pawls and a switch. The handle is formed with a head and two grooves. The toothed wheel is rotationally placed in the head and formed with teeth. The first pawl is movably placed in the first groove for engagement with the toothed wheel. The second pawl is movably placed in the second groove for engagement with the toothed wheel when the first pawl is disengaged from the first pawl. The switch is operable for moving the second pawl between a first mode for engagement with the toothed wheel and a second mode kept from engagement with the toothed wheel. The first groove is biased from the second groove by an angle of 360°×(M+½)÷N, wherein N is an integer that represents the number of the teeth and M is any proper integer.

Abstract: A device for calibrating a torque wrench includes a base plate, a strain gauge, a display, a cup, a rod and a ring. The strain gauge is non-rotationally connected to the base plate. The display is electrically connected to the strain gauge. The cup is non-rotationally connected to the base plate. The rod is non-rotationally connected to the cup. The ring is inserted in the cup so that the ring and the cup together define an annular gap for tightly receiving a socket.

Abstract: A wireless connective apparatus includes a connective rod, a transmission unit and a reception unit. The transmission unit includes a sensor for detecting a change in the status of the connective rod and a wireless transmitter for transmitting a wireless signal based on the change. The reception unit includes a wireless receiver for receiving the wireless signal from the wireless transmitter and a display for showing the change based on the wireless signal.

Abstract: A multi-mode one-way wrench includes a handle, a toothed wheel, two pawls and a switch. The handle is formed with a head and two grooves. The toothed wheel is rotationally placed in the head and formed with teeth. The first pawl is movably placed in the first groove for engagement with the toothed wheel. The second pawl is movably placed in the second groove for engagement with the toothed wheel when the first pawl is disengaged from the first pawl. The switch is operable for moving the second pawl between a first mode for engagement with the toothed wheel and a second mode kept from engagement with the toothed wheel. The first groove is biased from the second groove by an angle of 360°×(M+½)÷N, wherein N is an integer that represents the number of the teeth and M is any proper integer.

Abstract: A locking mechanism includes a sleeve, a body, a pawl and a lever. The sleeve is non-movably connected to a grip and formed with teeth. The body is non-movably connected to a knob, partially inserted in the sleeve, and includes a recess in communication with a cavity. The pawl is movably inserted in the recess and formed with teeth. The lever includes an end for pressing the pawl and another end pivotally connected to the body. The lever is movable in the cavity of the body between a first position to press a first portion of the pawl to engage the teeth of the pawl with the teeth of the sleeve and a second position to press a second portion of the pawl to disengage the teeth of the pawl from the teeth of the sleeve.

Abstract: A multi-scale mechanism comprising a rotatable driving shaft; a first scale mounted along the axis of said rotatable driving shaft, said scale including first and second sets of coarse scale divisions for indicating a coarse range of magnitude in two different systems of units as a function of the position of said first scale with respect to said rotatable driving shaft; a second scale for indicating a fine scale range of magnitude in one of said systems of units; a third scale for indicating a fine scale range of magnitude in the other of said systems of units; said third scale operatively connected to said rotatable driving shaft; and a gear assembly coupled to said rotatable driving shaft and connected to said second scale and said third scale, said gear assembly having a predetermined gear ratio such that said second scale and said third scale are each caused to move at the same time but at a different rate that is a function of their respective system of units.

Abstract: A one-way torque tool includes a head, a rotor placed in the head, a number of ratchets formed on the head, two pawls pivotally connected to the rotor and detachably engaged with the ratchets. The ratchets are separated from one another by a first angle ? identical to 360 degrees divided by the number of the ratchets. The pawls are separated from each other by a second angle ? identical to a multiple of the first angle ? plus a third angle ? that is smaller than the first angle ?.

Abstract: A one-way torque tool includes a head, a rotor placed in the head, a number of ratchets formed on the head, two pawls pivotally connected to the rotor and detachably engaged with the ratchets. The ratchets are separated from one another by a first angle ? identical to 360 degrees divided by the number of the ratchets. The pawls are separated from each other by a second angle ? identical to a multiple of the first angle ? plus a third angle ? that is smaller than the first angle ?.

Abstract: A multi-scale mechanism comprising a rotatable driving shaft; a first scale mounted along the axis of said rotatable driving shaft, said scale including first and second sets of coarse scale divisions for indicating a coarse range of magnitude in two different systems of units as a function of the position of said first scale with respect to said rotatable driving shaft; a second scale for indicating a fine scale range of magnitude in one of said systems of units; a third scale for indicating a fine scale range of magnitude in the other of said systems of units; said third scale operatively connected to said rotatable driving shaft; and a gear assembly coupled to said rotatable driving shaft and connected to said second scale and said third scale, said gear assembly having a predetermined gear ratio such that said second scale and said third scale are each caused to move at the same time but at a different rate that is a function of their respective system of units.

Abstract: A multi-scale mechanism comprising a rotatable driving shaft; a first scale mounted along the axis of said rotatable driving shaft, said scale including first and second sets of coarse scale divisions for indicating a coarse range of magnitude in two different systems of units as a function of the position of said first scale with respect to said rotatable driving shaft; a second scale for indicating a fine scale range of magnitude in one of said systems of units; a third scale for indicating a fine scale range of magnitude in the other of said systems of units; said third scale operatively connected to said rotatable driving shaft; and a gear assembly connected between said second scale and said third scale having a predetermined gear ratio such that said second scale is caused to move at a different rate than said third scale.

Abstract: A wrench includes a shank including a slot defined therein longitudinally, a handle attached to an end of the shank, a head, a torque assembly for connecting the head to another end of the shank, a torque-setting device and a torque-measuring device. The torque-setting device includes a knob inserted in the handle and a pin movable in and along the slot as the knob is spun. The torque-measuring device includes a measurement sleeve and a collar. The measurement sleeve is rotationally located around the shank and includes a helical groove defined in an internal side and a scale provided on an external side. A portion of the pin is movably inserted in the helical groove so that the measurement sleeve is spun as the pin is moved in and along the slot. The collar is located around the shank and includes a window through which the scale is observable.

Abstract: A wrench includes a shank including a slot defined therein longitudinally, a handle attached to an end of the shank, a head, a torque assembly for connecting the head to another end of the shank, a torque-setting device and a torque-measuring device. The torque-setting device includes a knob inserted in the handle and a pin movable in and along the slot as the knob is spun. The torque-measuring device includes a measurement sleeve and a collar. The measurement sleeve is rotationally located around the shank and includes a helical groove defined in an internal side and a scale provided on an external side. A portion of the pin is movably inserted in the helical groove so that the measurement sleeve is spun as the pin is moved in and along the slot. The collar is located around the shank and includes a window through which the scale is observable.

Abstract: A multi-scale mechanism comprising a rotatable driving shaft; a first scale mounted along the axis of said rotatable driving shaft, said scale including first and second sets of coarse scale divisions for indicating a coarse range of magnitude in two different systems of units as a function of the position of said first scale with respect to said rotatable driving shaft; a second scale for indicating a fine scale range of magnitude in one of said systems of units; a third scale for indicating a fine scale range of magnitude in the other of said systems of units; said third scale operatively connected to said rotatable driving shaft; and a gear assembly connected between said second scale and said third scale having a predetermined gear ratio such that said second scale is caused to move at a different rate than said third scale.

Abstract: A torque-indicating wrench includes a hollow handle, a head, strain gauge and a threaded bolt. The hollow handle includes an aperture defined therein and a screw hole defined therein opposite to the countersink hole. The head includes a reduced portion. A strain gauge includes a receptacle for receiving the reduced portion of the head and an insert inserted in the hollow handle and formed with an aperture. A threaded bolt is driven in the screw hole through the apertures.

Abstract: A torque-controlling wrench includes a handle, a socket-driving unit installed on the handle and a torque-controlling device. The torque-controlling device includes a rod installed in the handle and connected to the socket-driving unit, a knob installed on the handle and a spring compressed between the rod and the knob so that the knob can be turned to adjust a force exerted on the rod by the spring. An intermediate mechanism includes a first roller connected to the rod, a frame connected to the spring, a wheel installed on the frame and engaged with the roller and a second roller installed on the frame and engaged with the wheel. The centers of the first and second rollers are located on a same side of a vertical line passing a center of the wheel.

Abstract: Method and apparatus for handwriting recognition system for ideographic characters and other characters based on subcharacter hidden Markov models. The ideographic characters are modeled using a sequence of subcharacter models and by using two-dimensional geometric layout models of the subcharacters. The subcharacter hidden Markov models are created according to one embodiment by following a set of design rules. The combination of the sequence and geometric layout of the subcharacter models is used to recognize the handwriting character.

Abstract: A hysteresis circuit for use in a comparator having a first and a second transistors as an input stage and a constant current source. The hysteresis circuit comprises a first resistor disposed between a source of the first transistor and the constant current source and a second resistor disposed between a source of the second transistor and the constant current source, and comprises a first and a second current generating means. The first current generating means supplies a current to the source of the first transistor and derives a current out from the source of the second transistor if an output signal of the comparator is a first logic value, while the second current generating means supplies a current to the source of the second transistor and derives a current out from the source of the first transistor if the output signal of the comparator is a second logic value.

Abstract: A hysteresis circuit for use in a comparator having a first and a second transistors as an input stage and a constant current source. The hysteresis circuit comprises a first resistor disposed between a source of the first transistor and the constant current source and a second resistor disposed between a source of the second transistor and the constant current source, and comprises a first and a second current generating means. The first current generating means supplies a current to the source of the first transistor and derives a current out from the source of the second transistor if an output signal of the comparator is a first logic value, while the second current generating means supplies a current to the source of the second transistor and derives a current out from the source of the first transistor if the output signal of the comparator is a second logic value.