Abstract: A hitch guide is a device to aid the driver of a pickup truck in mounting a gooseneck trailer hitch onto the hitch ball mounted in the bed of a pickup truck. the present device has a strap mounted between tow end pieces which in turn mount on the side rails of a pickup truck bed to that the end pieces may be moved along the length of the pickup truck bed for adjustment purposes. A marker, mounted on the strap, may be adjusted laterally between the two pickup bed rails. When the strap and marker are properly adjusted, the pickup truck when backed up to the mounting pole of a gooseneck trailer so that the marker is just touching the mounting pole will be oriented so that the mounting pole and gooseneck trailer hitch are aligned directly over the hitch ball in the pickup truck bed.

Abstract: A step holding member has a first end which is insertable into a receiver-type trailer hitch and a second end which is adapted for holding a step member for stepping onto the tailgate of a pickup truck. In another embodiment of the invention the step holding member telescopes in and out towards a side of a pickup truck allowing for easy storage when telescoped in. In a third embodiment the step holding member folds inwards from the pickup towards the trailer hitch for storage. A fourth embodiment is adapted for mounting directly onto a trailer hitch drawbar so that the hitch may be used for towing with the step in place for use.

Abstract: The invention relates a DNA molecule which is a partial fragment of an intergenic region of a BBTV component or alternatively which DNA molecule is derived from said intergenic region whereby the DNA molecule is capable of promoting, enhancing, regulating, or modifying transcription of a non-BBTV gene.

Abstract: The invention provides DNA molecules consisting essentially of a nucleotide sequence or part thereof which are asosciated with the genome of banana bunchy top virus (BBTV) as illustrated in FIGS. 1 through 8 (SEQ ID NOS: 49-54, 27-37, 55-60, 38-48, and 9-23, respectively) of the specification attached herewith.

Abstract: Apparatus for soldering surface mounted devices to printed circuit boards utilizing a combination of forced convection and infrared radiation. Fans are disposed in each heating zone which force gas through a heating plate which heats the air, emits infrared radiation for heating of printed circuit boards, and establishes a flow pattern for the gas. Flows are controlled in each zone by selectively introducing unheated gas into each zone, and by selectively exhausting gas from each zone. The volume of gas introduced and exhausted from each zone can be controlled. Closures are provided in the return channels to the low pressure side of the fan for controlling the volume of gas recirculated from the conveyor. Flow is controlled such that cooler air is always introduced into the zones which have a lower temperature and is exhausted from zones which have higher temperatures.

Abstract: Apparatus for soldering surface mounted devices to printed circuit boards utilizing a combination of forced convection and infrared radiation. Fans are disposed in each heating zone which force gas through a heating plate which heats the air, emits infrared radiation for heating of printed circuit boards, and establishes a flow pattern for the gas. Flows are controlled in each zone by selectively introducing unheated gas into each zone, and by selectively exhausting gas from each zone. The volume of gas introduced and exhausted from each zone can be controlled. Closures are provided in the return channels to the low pressure side of the fan for controlling the volume of gas recirculated from the conveyor. Flow is controlled such that cooler air is always introduced into the zones which have a lower temperature and is exhausted from zones which have higher temperatures.

Abstract: A foam sandwich construction and a method for generating same. The construction includes a central foam layer which is formed of materials selected so that central layer can be a stress carrying member of the construction.

Abstract: A modular flat plate solar collector for fluid such as air or water includes a plurality of stacked, separable solar collector elements or sub-assemblies. Removable fastening members maintain the sub-assemblies in intimate contact with each other during operation and permit access and replacement of the sub-assemblies for repair purposes. This modular approach provides a reliable, low-cost and structurally strong unit. The use of a flow channel plate having passages with aspect ratios substantially in the range of 20 or greater further improves the performance and efficiency of the collector.

Abstract: A code detector for detecting the presence or absence of particular binary digital signalling codes in the digital bit stream from extension telephones of a digital PABX telephone system. The detector is connected to a telephone being monitored and receives digital data from the telephone, which data may be random speech data or a signalling code. The detector consists essentially of a ROM which uses each of the data bits arriving in serial form as the least significant bits of the address for a micro-program stored in the ROM which provides the other address bits, thus causing the program to be stepped through a sequence of addresses which depend upon the sequence of the incoming data bits. For a program to end up at a specified address the ROM must receive the code which is unique in causing the program to arrive at that address. The detector then outputs a code representative of the detected code.