Electric Heating Co., Inc

Straight Out

Camber is defined as a slight convexity - a shape that curves or bulges outward. It comes into play as an advantage for Watt-Flex® cartridge heaters. Two factors present problems with the use of conventional cartridge heaters in long bores:

• A drilled bore or hole into which a cartridge heater is inserted is often not perfectly straight. If a perfectly straight heater is inserted into the bore, it will bind to the point that it cannot be installed. The conventional heater does not have flexibility to give with a slight camber in the hole over a long distance of 20"+. If the hole is a bit oversized to aid in insertion, the heater will not make effective metal to metal contact to ensure maximum conduction of the heat generated.
• Conventional heaters will often have a slight camber which will interfere with ease of insertion in a long bore. In oversized bores, this will diminish heat transfer on different surfaces of the heater, causing different grain growth in the metal sheath and resulting in further warping of the heater.

Conventional cartridge heaters can warp and bind up in the bore because of temperature differentials from one side of heater to the other.

The Watt-Flex cartridge heater has a flexibility resulting from its split-sheath design. A long heater will display an ability to slightly bend with camber in a bore, maximizing ease of installation, while affecting the optimum surface contact with the walls of the bore. In our production process heaters will occasionally exhibit a slight camber resulting from manufacturing. The convexity is easily straightened and, because of the flexibility of the heater, will never be a problem with customers.

Friday Punnies

The roundest knight at King Arthur's round table was Sir Cumference. He got his size from too much pi.

I thought I saw an eye doctor on an Alaskan island, but it turned out to be an optical Aleutian.

She was only a whiskey maker, but he loved her still.

A rubber-band pistol was confiscated from algebra class because it was a weapon of math disruption.

Dalton Electric Heating Co., Inc (978)356-9844
28 Hayward Street Ipswich, MA 01938 USA

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