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US 4,054,859 AGranted
Flame probe
AssigneeRobertshaw Controls Company
InventorsAllen L. Teichert, Richard E. Jones
Life of this patent
Estimating the term…
Abstract
A flame probe for use in an automatic pilot ignition system includes both a thermally responsive flame switch and a sensing electrode located in the flame for use in a flame conductivity sensing circuit. Separate conductive paths are provided for the flame switch and for connection to the sensing electrode and the conductive paths are completely insulated from each other.
Claims17
A flame probe comprising
- a tubular electrode,
- a thermally responsive motive device at least partially contained within the tubular electrode,
- first, second and third terminals,
- a first conductive path electrically connecting the first terminal to the electrode, and
- a second conductive path electrically connecting the second terminal to the third terminal in response to the operation of the thermally responsive motive device,
- the first and second conductive paths being electrically insulated from each other.
3 more elements
A flame probe comprising
- a thermally responsive motive device,
- a tubular electrode mounted on the thermally responsive motive device,
- electrical conductive means connecting to the tubular electrode through the thermally responsive motive means,
- a pair of switch contacts, and
- insulating operator means transmitting the movement of the thermally responsive motive device to the pair of switch contacts to operate the switch contacts in response to the movement of the thermally responsive motive device.
2 more elements
Dependencies are inferred from the claim text.