Kriebel Hot Water System
Kriebel was very involved with steam heating and they made a device that worked in a similar way to Honeywell's Heat Generator. Thanks to Gerry Gill for finding this pate...
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Recent Articles
Mark C. Honeywell's Patent for a New Type of Tee
In a gravity hot water system, the hottest water is near the top of the horizontal main and tends to travel first to the upper-floor radiators. Mr. Honeywell, in 1909, pa...
Mark C. Honeywell's Patent for the "Unique" Valve
This valve, patented in 1907, gave the people installing hot-water heat a way to compete with the people who were installing one-pipe steam. The Unique valve allowed gave...
Mark C. Honeywell's Patent for the Heat Generator
By using a pot of mercury and a submerged pipe, this device separated the water in the system from the water in the expansion tank. Honeywell called it the Heat Generator...
McKeown Intensifier
The Intensifier, invented by W.C. McKeown, does a job similar to the one performed by Honeywell's Heat Generator. Thanks to Steve Pajek for finding this patent.
Modern and Modernized Hot Water Heating
Here is an interesting article from Western Plumbing and Heating Journal, April 1937, and a real call to arms!
Monoflo Tee Patent
Here is a patent issued to August Kehm for his tee fitting, later used by Bell & Gossett for their Monoflo. Thanks to Gerry Gill for the research, and for finding the pat...
O-S Fitting Patent
Thanks to Gerry Gill for finding Oliver Schlemmer's patent for the O-S fitting, which made one-pipe hot water heating possible.
Parker's Twin Tee Patent
Edward Parker received this patent in 1911 for a different way to pipe a hot water radiator. Thanks to Steve Pajek for finding it and sharing it with us.
Phelps Tee Patent
One of the earlier gravity-hot-water-heating devices. Water would stratify in the horizontal main, with the hottest water rising to the top of the pipe. It left the tee a...