Abstract: The trailer chassis includes a plurality of frame members forming a substantially rectangular box frame. The rectangular box frame includes a central, elongate main sub-frame integral with a pair of spaced outboard frame rail sections where wheel wells are formed. The central main sub-frame is devoid of cross members to provide unhindered storage space. Select sections of the rectangular box frame are covered with rigid plating to strengthen the torsional rigidity of the trailer chassis. The front section of the rectangular box frame includes a raised platform with a hitch frame integral thereto for installing a hitch. The trailer chassis is detachably mounted to the trailer in order to permit separate shipment of the trailer chassis in a shipping container.

Abstract: A water spray system applied directly to cooking units in a kitchen rather than to the ventilating duct for the cooking units. The system may be a wet system with water pressure maintained at spray nozzles which open in case of fire, or an open head, or dry, system controlled by thermostats and a solenoid water valve. Safeguards are provided against loss of water pressure, surges in the water supply line, flare ups after partial cooling of the thermostats, closing of a solenoid gas valve supplying gas burners in the cooking units as a result of momentary outages in the electric service supplying the control circuits, and other contingencies.

Abstract: The shipping support tray of this invention comprises a single containerboard element containing integral members cut in the board to form a plurality of interlocking post elements for supporting and positioning tubes of wound yarn in a spaced relationship during shipment. The one element serves as both a base and top tray support.