摘要:
Disclosed herein is a hand tool comprising a first hand tool member comprising a pin, a hole, a bearing surface, and at least one groove, and a second hand tool member comprising a hole, a bearing surface, and at least one groove. The groove of the first hand tool member engages the groove of the second hand tool member when the hand tool is in a closed position. Further, the groove of the first hand tool member disengages from the groove of the second hand tool member when the hand tool is in a fully open position.
摘要:
A method and apparatus for curing dental material with radiation from a halogen lamp provides for a shifting of a spectrum of the radiation to a shorter wavelength for increased rate of curing by adjusting current flow within a heating element of the lamp. The current is applied over an interval of time for accomplishing the curing. Feedback and feedforward circuitry, operative with a control signal of a regulated power source to reduce voltage applied by the power source to the heating element during an initial portion of the interval of time, prior to obtaining an operating temperature of the heating element, to maintain an upper bound on the magnitude of the current applied to the heating element, thereby to the vivid unnecessary and operations of the heating element for increased operating lifetime of the lamp.
摘要:
A strobe light curing apparatus (10) includes trigger electronics (50) for producing a series of pulses at a predetermined frequency. A flash lamp (30) is coupled to the trigger electronics (50) for producing flashing light according to the series of pulses. A reflector (32) is further disposed from the lamp (30) at a predetermined distance for reflecting, and focusing the flashing light at a second predetermined distance.
摘要:
A curing lamp apparatus is used for providing electronic voice information to report a number of operating conditions associated with the curing lamp (40). The apparatus includes a light sensor for sensing output power (240), voltage and current sensors for sensing input power (45-48), a microcontroller for providing a digital number in response to receiving signals from one or more sensors (70), a programmed voice circuit for retrieving a voice message signal from a memory (140), address associated with the digital number (110), and a transducer for receiving and audibly reproducing the voice message signal (130).
摘要:
In a switching voltage power supply, a series regulator circuit interconnects an input voltage section (44) with an output voltage section (20B) of the switching power supply. The regulator circuit has an n-channel MOSFET transistor (Q1) serving as a regulator element. A gating circuit applies a gating voltage to the gate terminal relative to the drain terminal for establishing states of current conduction and current cut-off in the transistor. A biasing circuit interconnects the gating circuit with the drain terminal for establishing an offset potential of the gate terminal relative to the drain terminal during the state of current conduction, the offset potential counteracting a gate-to-source threshold voltage for reduction of a voltage drop between the drain terminal and the source terminal with a corresponding reduction in power dissipation of the regulator element.
摘要:
A strobe light curing apparatus (10) includes trigger electronics (50) for producing a series of pulses at a predetermined frequency. A flash lamp (30) is coupled to the trigger electronics (50) for producing flashing light according to the series of pulses. A reflector (32) is further disposed from the lamp (30) at a predetermined distance for reflecting, and focusing the flashing light at a second predetermined distance.
摘要:
A pliable dispensing bag (10) containing a flowable material (12) includes an internal rigid adaptor plate (14) having an offset or asymmetric integral nozzle (36) through which the flowable material may be extruded. The deformable material of the bag (10) is clamped around a collar (30) provided at the base of the nozzle (36) so as to form a permanent first leakproof seal. Additional material from the foil bag (12) is gathered at the top of a cap (38) fitted over the nozzle (36) and clamped (54) against the top of the cap (38) to form a removable or temporary second seal and to further hold the cap in place on the nozzle.
摘要:
A dental post (24) for securely retaining a dental restoration on a prepared tooth stub. The dental post (24) is formed of an elongated cylindrical rod (26) having intermittent thread segments (38) which actively engage the dentin of the tooth stub and passive land portions (40) between the thread segments.
摘要:
A dispensing and mixing apparatus (10) for simultaneously dispensing from a cartridge (12) into a static mixing element (14) components which harden when mixed. The components exit the cartridge into the mixing element without intermixing as the components leave the cartridge. The initial intermixing of the components takes place within the mixing element. The cartridge is reusable since the components do not become mixed and harden as they come out of the cartridge. The chambers (22, 24) in the cartridge are of semi-cylindrical configuration and have rounded corners (36, 38, 40, 42). Ribs (100) can be provided on the cartridge for stiffening the cartridge from deforming under extrusion.