Heerdt
Dieter B. Heerdt, Hendersonville, TN US
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20080237210 | Hot melt adhesive hose assembly with thermal fuse link - A hot melt adhesive hose assembly comprises a heater circuit wrapped around an external surface portion of the hose assembly, a temperature sensor, and an elongated thermal fuse which is likewise wrapped around an external surface portion of the hose assembly such that successive spiral turns of the thermal fuse are effectively interposed between successive spiral turns of the heater circuit. The thermal fuse may be electrically connected in series with the heater circuit so as to effectively terminate electrical power to the heater circuit as a result of the melting of the thermal fuse, or alternatively, the thermal fuse may be electrically connected in series with the temperature sensor, so as to detect abnormal temperature levels at substantially any location throughout the length of the hose assembly. | 10-02-2008 |
20090084773 | Information communication systems between components of a hot melt adhesive material dispensing system - A hot melt adhesive material dispensing system includes a communication system for transmitting information or data between the adhesive supply unit (ASU) and one or more applicator heads, wherein the number of hard wires actually interconnecting the adhesive supply unit (ASU) and the one or more hot melt adhesive material dispensing applicator heads can be reduced by the employment of signal couplers. In addition, the number of applicator heads that can be utilized in conjunction with a particular adhesive supply unit (ASU) can be increased by incorporating the temperature controller, normally disposed upon the adhesive supply unit (ASU), upon the applicator head. | 04-02-2009 |
Dieter Bernhard Heerdt, Hendersonville, TN US
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20120118136 | MOTOR CONTROL - A motor control system includes a piston chamber and a piston assembly disposed within the piston chamber to move therein between first and second positions. A magnet is coupled to the piston assembly to move therewith and a sensor is axially mounted with respect to the piston assembly to generate a continuous output signal corresponding to a position of the magnet relative to the sensor. The motor control system also includes a controller for processing the output signal from the sensor to monitor continuously the position of the piston assembly within the piston chamber and for actuating the piston assembly to move in an upstroke toward the first position and in a downstroke toward the second position. | 05-17-2012 |
Frank Heerdt, Shenzhen CN
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20110292551 | ARC EXTINGUISHING HYBRID TRANSFER SWITCH AND SWITCHING METHOD - The present invention discloses an arc extinguishing hybrid transfer switch, including a mechanical switch and a first thyristor branch connected in parallel with the first contact branch of the mechanical switch, wherein the first thyristor branch includes a first thyristor, a second thyristor, a first polarized capacitor and a second polarized capacitor, the first thyristor and the first polarized capacitor are connected in series in the same direction, the second thyristor and the second polarized capacitor are connected in series in the same direction, and a branch consisted of the first thyristor and the first polarized capacitor and a branch consisted of the second thyristor and the second polarized capacitor are connected in parallel in reverse direction. The invention further discloses a switching method for the arc extinguishing hybrid transfer switch for implementing an arc extinguishing of a mechanical switch. In the invention, a low-power thyristor may be used, thus the cost of the switch may be lowered greatly. Moreover, the thyristor may be replaced by the polarized capacitor for implementing the arc extinguishing when a short-circuit failure occurs on the thyristor. Thus, the load current is lowered greatly and the influence of thyristor failure on the load is reduced. | 12-01-2011 |
20120125894 | ARC EXTINGUISHING SWITCH AND SWITCHING METHOD THEREOF - The present invention discloses an arc extinguishing switch, including a mechanical switch and a first electric branch connected in parallel with a first contact branch of the mechanical switch, the first electric branch includes a first controllable unidirectional turn-on subbranch and a second controllable unidirectional turn-on subbranch, the first controllable unidirectional turn-on subbranch and the second controllable unidirectional turn-on subbranch are respectively controlled by two thyristors to be turned on in AC positive and negative periods correspondingly and share a first capacitor connected in series with the two thyristors. The invention further discloses a switching method using the arc extinguishing switch. In the invention, the high power requirement for the thyristor in the arc extinguishing switch and the product cost are lowered, and it is avoided that the mechanical switch is bypassed when the short-circuit failure occurs on the thyristor. | 05-24-2012 |
Frank Weiner Heerdt, Montgomery GB
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20140233136 | Electrical Protection Device And Method - A voltage measurement is made between two points in a circuit. If the measured voltage exceeds a predetermined amount, a switch is operated to electrically connect the two points. | 08-21-2014 |
20140246913 | Drive Circuit For Electrical Load - A circuit for an electrical load comprises a passive transformer, the secondary of which is connected to power cells for each phase according to the transformer tappings. Each power cell comprises a low cost but efficient power factor correction circuit to produce lower harmonics on the transformer. | 09-04-2014 |
Paul M. Heerdt, Greenwich, CT US
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20120214873 | CYSTEINE FOR PHYSIOLOGICAL INJECTION - This application describes methods of making and using physiological cysteine solutions useful for reversing a neuromuscular blockade caused by a cysteine-reversible neuromuscular blockade agent, that overcomes problems of cysteine precipitation and dimerization. | 08-23-2012 |