Gm Global Technolgoy Operations, Inc.

Kenneth R Deming

Gamdur S Mann

Michael P Murphy

David R Fredericks

A readily manufacturable heated solid electrolyte oxygen sensor having an elongated heater supported in subassembly with a tubular terminal for a reference electrode of the sensor. The heater is coaxial with the electrode terminal for predetermined disposition with respect to the sensor solid electrolyte member. The heater includes a rod coaxially in a ceramic tube and a resistance heating coil and crimped outer connector around the ceramic tube. Fused glass, directly bonded to the ceramic tube, supports the heater in the electrode terminal.

Heated solid electrolyte oxygen sensor

An improved 'reset' type odometer assembly having counting wheels rotatably supported on a shaft and interconnected by pinion gears therebetween for sequential counting as mileage progresses. A gear wheel between each of the counting wheels is engaged on its right side by a pinion gear which moves with each revolution of the counting wheel located to its right. In turn the gear wheel engages an outer pawl on a molded ratchet spring to cause corresponding rotation of the leftwardly positioned counting wheel. The ratchet spring also has an inner pawl which is engaged by a groove in the shaft when rotated to cause the ratchet spring and counting wheel to rotate during a reset mode of operation. During resetting, the gear wheel and pinion gears are stationary and the outer pawl moves between circumferentially spaced detents in the gear wheel. The ratchet spring itself is formed with inner and outer hoop portions and is of a relatively flexible plastic material to permit movement between the hoop portions and the two pawls.

Reset odometer mechanism

An odometer assembly having a shaft on which a plurality of numbered counting wheels are mounted for rotation and including a rotatable service indicator wheel supported on the shaft next to the highest order counting wheel for rotation therewith until a flag portion which overlays the indicator wheel becomes visible to the vehicle operator. A drive mechanism between the service indicator wheel and the highest order counting wheel couples the wheels together for the aforementioned rotation and thereafter permits the highest order counting wheel to rotate with respect to the service indicator wheel. A rotatable reset lever means is also provided to counter-rotate the service indicator wheel back to its original non-indicating position.

Growing community of inventors

Flint, MI, United States of America

Kenneth R Deming