A cycle lock having at least one plurality of disc-like tumblers loosely mounted on a shaft parallel with the axis of rotation of the key rotated lock cylinder. Each tumbler has a two spaced lobes which, in the neutral state of the tumbler, contact the arcuate surface of the cylinder but one of the lobes may drop into the key slot in the cylinder if not occupied by a high segment on the key. A key is initially inserted into the lock at a special location at which all tumblers are in their neutra...

A refrigerating cycle composed of a compressor, a condenser, a pressure differential valve, a throttle, an evaporator and a check valve. The check valve is connected back to the compressor. The above mentioned pressure differential valve is divided into a valve section and a control section. The control section is further divided into two chambers by a diaphragm. Two pressure introducing tubes are connected to the pipe on the respective sides of the check valve. During operation of the refrigera...

A cycle seat of a type having a housing adapted to be attached to a bicycle or tricycle. A first buttock-supporting member having a front end and a rear end thereof is pivotally attached to the rear end of the first buttock-supporting member, and a second buttock-supporting member having a front and a rear end thereof is pivotally attached at the rear end thereof to the housing along a substantially horizontal axis. A coordinating apparatus is provided for supporting bottom portions of the first...

A cycle timer comprises an angle encoder for converting an mechanical angle information into an electrical angle information, a memory unit for storing timing information and a control program for setting an output if the angle information falls within an on region of predetermined timing information and for resetting the output if the angle information falls within an off region of the predetermined timing information, an arithmetic processing unit for reading out and outputting from the memory...

There is provided a frame assembly for a foldable cycle. The assembly has a rear frame portion including a mounting for a rear wheel; a forward frame portion, hingedly connecting to the rear frame portion such that the two are foldable towards each other; and hingedly connecting to the forward frame portion, a pivot assembly for a mounting arm including a mounting for a forward wheel. On folding of the cycle, hinged movement of the pivot assembly relative to the forward frame portion moves the m...

Cycle pedals, for cycles in which the pedal axle is mounted inside a bearing, are equipped with means of adjustably fixing the bearing on the platform, and include means for fastening a pedal-stop provided under the sole of the cyclist's shoe. The bearing is mounted on the upper face of the platform, in such a way that two lugs provided on the pedal-stop are engaged one on each side of the bearing, and the plate of the pedal-stop is in contact with the bearing and is held in its center, which co...

A variable displacement compressor driven by an engine, such as an engine for driving an automotive vehicle is used as a compressor, and the capacity of the compressor is controlled by a capacity control valve such that the differential pressure between discharge pressure and suction pressure of refrigerant becomes equal to a predetermined differential pressure determined by an external signal. Pressure substantially equal to pressure applied across the compressor is applied across the ejector, ...

In a CO.sub.2 refrigerant cycle, a lubricating oil for a compressor has a compatibility relative to CO.sub.2 refrigerant, and the compatibility of the lubricating oil relative to the CO.sub.2 refrigerant at a pressure lower than a critical pressure of the CO.sub.2 refrigerant is lower than that at a pressure higher than the critical pressure of the CO.sub.2 refrigerant. Thus, in a low-pressure side such as an accumulator of the CO.sub.2 refrigerant cycle, because a liquid lubricating oil is sepa...

A refrigeration cycle that controls the deposit of foreign matter at inlet or outlet of a capillary tube, which forms an expansion device in the refrigeration, regardless of changeover from a cooling operation to a heating operation. In particular, in a refrigeration cycle using an alternative refrigerant, a junction is provided for joining an end of a capillary tube forming an expansion device to the piping through which the refrigerant flows. The junction has a slope defined by the inside diam...

In a heat transfer tube for a zeotropic refrigerant mixture, the inner surface of the tube in which the zeotropic refrigerant mixture flows is formed with grooves having cross portions where the grooves intersect with each other, or the inner surface of the tube is formed with a plurality of independent projections. Thus, concentration boundary layers generated in the zeotropic refrigerant mixture are stirred to reduce the thickness of the concentration boundary layers, thereby decreasing the di...