An electrical clock is provided in which pulses of a 10% duty cycle are repeatedly applied at a one second rate to a solenoid which attracts an armature attached to a reciprocating ratchet once every second, the reciprocating ratchet being returned to a neutral position between each pulse. The reciprocating ratchet drives a toothed wheel which is located on a main axis of the clock frame view suitable pawls. The second hand of the clock is directly coupled by a second hand shaft to the toothed wheel. The toothed wheel, by means of a pinion, drives an intermediate gear which is located outbound from the main axis. The intermediate gear drives a minute gear, the minute gear being mounted on a minute tube concentric with the second hand shaft. The minute hand is directly affixed to the minute hand tube. The minute gear, by means of a pinion, drives an outbound motion gear, the motion gear in turn driving an hour gear coupled to an hour tube whose axis is concentric with the second shaft and the minute tube. The hour hand is affixed directly to the hour tube. Various other embodiments of the electrical clock mechanisms of the subject invention are described in more detail herein.
The reducing gear train of an electronic watch with analog display comprises a driving pinion of a step-by-step motor, a second wheel and pinion, a third wheel and pinion and a great wheel. A cannon pinion non-coaxially mounted in relation to the great wheel meshes with an intermediate wheel meshing with a great-wheel-arbor pinion frictionally coupled to the great wheel.
The present invention in an improved orthopedic appliance is for attachment in supporting engagement to a patient's spine, during an anterior surgical procedure thereof. The installed appliance provides for decompression of the contents of the spinal canal and/or is to obtain sufficient fusion mass to provide long-term spinal stability. The appliance incorporates a pair of contoured rocker arm brackets that are each attached to a separated vertebral portions of healthy vertebra, with a damaged or diseased vertebra therebetween. Spacing adjustment and columnar support between the brackets is provided by a single spacing adjustment rod whose ends are threaded oppositely and are turned into appropriately threaded portions of the brackets. A second slide rod is preferably provided that also extends between the brackets and is arranged to slide freely therein but preferably is arranged to accommodate nuts, or the like, turned thereon against the brackets to provide columnar support thereacross.
