Littelfuse, Inc.

Hamlin Electronics (suzhou) Ltd.

Paulius Kabisius

Efrem Fesshaie

Jianhua Chen

Dong Liu

Mindaugas Ketlerius

Rimantas Misevicius

A self-limiting heater and method for building the self-limiting heater are disclosed. The self-limiting heater consists of a resistor and a PTC resistor coupled together in series with a power supply. Both resistive devices have good thermal coupling. The resistor has a minimal resistance change over changes in temperature while the resistance of the PTC resistor increases with an increase in temperature. The ohmic resistance ratio between the resistor and the PTC may be used to adjust the heater characteristics and limit the characteristic sharpness.

Self-limiting heater

Provided are waveguide sensors and position sensing systems. In some embodiments, a position sensing system may include a waveguide configured to receive and transmit a pulse, and a magnet moveable relative to the waveguide. The waveguide may include a first core layer and a second core layer, a magnetic layer between the first and second core layers, and a conductive winding around the first core layer, the second core layer, and the magnetic layer. The position sensing system may further include a first substrate layer above the conductive winding and a second substrate layer below the conductive winding.

Waveguide for propagation velocity compensated position measurement magnetic sensor

A pPTC heating device having areas with different power densities distributed over the surface of the device. The device is constructed using a base layer composed of a pPTC material having a layer of sectioned conductive plates disposed over and under the layer of pPTC such as to control the path of the current through the device, thereby controlling resistance of the device and the power density of the device.

PPTC heating element having varying power density

An ignitor for an electronic detonator, the ignitor including a microcontroller and a capacitor mounted on a printed circuit board (PCB) and electrically connected to one another, the microcontroller configured to discharge the capacitor in response to an actuation signal received by the microcontroller, a pair of conductive traces extending from the capacitor, a resistive element extending between the conductive traces and configured to radiate heat in response to current flowing therethrough, and a shroud disposed over the resistive element, the shroud containing a pyrotechnic composition that at least partially covers the resistive element.

Ignitor for electronic detonator

An integrated rain and solar radiation sensing module including at least two light emitting elements, a plurality of input lenses, wherein at least two of the plurality of input lenses are configured to receive and collimate light emitted by each of the light emitting elements, a plurality of output lenses numbering at least twice as many as the plurality of input lenses, wherein each output lens is configured to receive and focus light that is collimated by at least one of the plurality of input lenses and reflected off of a transparent substrate, and a plurality of light receiving elements, wherein each light receiving element configured to receive focused light from at least one of the output lenses and to convert the received light into an electrical output signal proportional to the received light.

Growing community of inventors

Kaunas, Lithuania

Paulius Kabisius