Abstract: A soot sensing system includes a soot sensor having a first element, and circuitry to an amount of soot accumulated on the element and to control heating of the element in response to the soot accumulation. An electrostatic repelling voltage (ERV) may be applied to a sensor/heater element(s) during a contamination prevention mode (CPM) to repel ash and reduce contamination of the sensor. A pulsed heating voltage (PHV) may be applied to the elements during the CPM and a pulsed ERV may be applied to the elements during the “off” period of the PHV. All voltage to the elements may be turned off during the CPM and the elements may be floating/ground. A PHV may be applied to the elements during the CPM and no voltage may be applied to the elements during the “off” period of the PHV. A heating voltage may be applied to the elements during a CPM corresponding to a cold start.

Abstract: A toy launch apparatus for discharging circular projectiles of predetermined diameter and height. The apparatus includes multiple safety features to prevent inappropriate objects inserted into the apparatus from enabling the apparatus to operate. A side latch is mounted that locks a shuttle to a housing assembly unless a properly sized projectile is inserted that rotates a side latch bar rotatably mounted to the shuttle out of engagement with an abutment surface in the housing assembly. A top latch is mounted that locks the shuttle to the housing assembly unless the inserted projectile also rotates a top latch bar mounted to the shuttle out of engagement with another abutment surface in the housing assembly.

Abstract: A toy launch apparatus for discharging circular projectiles of predetermined diameter and height. The apparatus includes multiple safety features to prevent inappropriate objects inserted into the apparatus from enabling the apparatus to operate. A side latch is mounted that locks a shuttle to a housing assembly unless a properly sized projectile is inserted that rotates a side latch bar rotatably mounted to the shuttle out of engagement with an abutment surface in the housing assembly. A top latch is mounted that locks the shuttle to the housing assembly unless the inserted projectile also rotates a top latch bar mounted to the shuttle out of engagement with another abutment surface in the housing assembly.

Abstract: A toy drive mechanism having extensions such as leg and neck members covered with a plush covering. The drive mechanism is operative to move the leg, back, and head members in coordinated movements imitating an animal tugging or pulling on a rope. The realistic movement is provided by a series of rotating devices, some on differing axes relative to the drive shaft, and an information processor activated by one or more switches located throughout the body. One switch in particular, located between the neck and head and motivated by a user pulling on the rope in the toy's mouth, will cause the toy to exert a pulling motion accompanied by sound effects.