Zanardi v. Pacific Telephone & Telegraph Co.

284 P.2d 851, 134 Cal. App. 2d 3, 1955 Cal. App. LEXIS 1710
California Court of Appeal·Decided June 22, 1955·No. Civ. 8536·Published·Cited by 3 cases

Opinion

VAN DYKE, P. J.

Plaintiff appeals from the judgment entered upon a jury verdict in favor of defendants, Pacific Telephone and Telegraph Company, a corporation, hereinafter called “the company,’’ and Jane Dubois, its employee.

Appellant was injured by an explosion occurring within an automatic oil burning circulating heater manufactured by H. C. Little Company. The explosion occurred when appellant removed a so-called inspection plate, allowing a large indraft of air. The respondents put on no evidence material here.

Appellant’s evidence may be summarized as follows: The heater operates by vaporizing fuel oil into gas and then burning the gas. The oil reaches the heater by gravity from an oil tank located without the company’s building. The flow into the heater of the oil is subject to automatic control. As the oil reaches the control unit it remains there until a valve, operated by thermostatic control, opens to allow the oil to flow into the combustion chamber of the heater. The amount of oil in the control unit is limited by a float and valve operating somewhat on the same principle as the carburetor for a gasoline engine. A second float in the control unit is designed to trip a mechanism on the side of the heater, referred to by the witnesses as a “trip,” shutting off the oil supply in case there is an excess of oil. A feed control on the outside of the control unit determines the amount of oil which can flow from the control unit into the heater in a given space of time. The device has a setting range divided into six positions and can be manually set at any of the positions numbered 1 to 6. The higher the setting the more oil can flow into the heater, and *5 the maximum flow at position 6 amounts to 45 cubic centimeters per minute. After the oil leaves the control unit it flows into the lower portion of the combustion chamber, known as the firebox, where it is ignited by an electrically heated element. The resulting heat vaporizes the oil into gas, sending it into the heat chamber, a separate portion of the heater located above the firebox. There the gas is consumed, providing heat. The inspection plate is a 2 inch by 2% inch plate attached to the firebox by two screws. When the heater is operating it is possible, by opening a door on the side of the heater, to observe the flame in the firebox through a small hole in the inspection plate. It is not uncommon for this or for other automatic oil heaters to become flooded and when this occurs the combustion flame may be located entirely in the heat chamber and not be visible through the hole in the inspection plate. But there is no danger of such a heater exploding under these conditions if it is left alone. If, on the other hand, the heater is flooded with oil and the combustion is confined to the heat chamber, the gases therein not being all consumed, the sudden intrusion of additional air supply into the combustion area can cause an explosion. Removing the plate may supply this condition through allowing a larger supply of air to enter. This does not happen unless the plate is either removed or opened by loosening one screw and removing the other so that it swings free. Plaintiff’s expert witness, one Mills, who sells and services the H. C. Little automatic heaters, testified that the inspection plate is removed: 1. To replace the element which ignites the oil; 2. To replace the asbestos wick, a part of the burning device, and, 3. To clean out carbon that has accumulated. He testified that usually the heater is drained of oil before the inspection plate is removed. He testified that generally, and as a precaution against explosion, accumulated oil is drained out of the heater before the inspection plate is removed; that the burner would have to be warm before it would generate gas sufficient to cause an explosion, since a cold burner would not do that; that after the accident out of which this suit arose he was called in to service the heater and found that about a quarter of an inch of oil had gathered in the bottom of the firebox; that the manually operated feed control was set at 6, the maximum setting; that after servicing the heater and putting it back into operation he reset this control at 4 to 4%, allowing less oil to feed into the firebox; that normally there would be little oil in that form in the firebox, it being vaporized practically as fast as it *6 entered unless, as he put it, “the feed control is set too high.” Neither this witness nor any witness testified that the setting of the feed control at position 6 was a dangerous thing to do and it is apparent from the testimony that the setting range was one fixed by the manufacturer as permissible in the use of the heater. There was testimony that this manual control was sometimes locked into the position at which it was set by the installer of the heater if there were either children about who might vary the setting or persons described by the witness as being persons who never can leave things alone. It appears that the heater is one designed and sold for use as an ordinary household appliance, appellant himself testifying that he supplied oil to more than a hundred of such heaters in his community as a part of his business of running a gas service. Mills testified that he had sold and installed upwards of 150 of such heaters.

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Zanardi v. Pacific Telephone & Telegraph Co., 284 P.2d 851, 134 Cal. App. 2d 3, 1955 Cal. App. LEXIS 1710 (Cal. Ct. App. 1955).

284 P.2d 851 (Zanardi v. Pacific Telephone & Telegraph Co.) — published by Counsel Stack Legal Research, free access to 12M+ legal documents.

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