Abstract: A synchronized gear shift mechanism is provided for a marine propulsion system. Using a hub and a sleeve that are axially movable relative to an output shaft but rotationally fixed to the shaft and to each other, the gear shift mechanism uses associated friction surfaces to bring the output shaft up to a speed that is synchronism with the selected forward or reverse gear prior to mating associated gear tooth surfaces together to transmit torque from an input shaft to an output shaft. The friction surfaces on the forward and reverse gears can be replaceable to facilitate repair after the friction surfaces experience wear.

Abstract: A drain system is provided for a marine vessel in which three types of drain operations can be performed at one common location near the transom of the marine vessel. A multiple conduit structure is provided with a plurality of fluid passages extending at least partially through its structure. A first fluid passage allows the bilge of the boat to be drained. A second fluid passage allows multiple locations on the engine to be drained through a common port. A second sealing plug is provided to close the second passageway that prevents fluid communication between the various fluid conduits used to drain the cooling water of the engine. A third fluid passage is provided through the multiple conduit structure to allow lubricating oil to be drained from the engine.

Abstract: A system for a trimable marine stem drive shifts the trimable range on a conventional hydraulic trim system. The system includes an enlarged cylinder anchor pin hole in the drive shaft housing, an anchor pin smaller in size than the enlarged anchor pin hole located in the drive shaft housing, and a movable trim adjustment insert that is inserted into the enlarged anchor pin hole to secure the anchor pin in a fixed position within the enlarged hole. It is preferred that the enlarged anchor pin hole be a substantially horizontal elongated hole, and that the trim adjustment insert be placed rearward of the anchor pin to position the anchor pin in a forward position, or forward of the anchor pin to locate the anchor pin in a rearward position. The invention shifts the trimable range of the drive, while maintaining vibration isolation characteristics available in conventional hydraulic trim systems.

Abstract: A filter selector generates a filter address value to select one of a number of frequency characteristics of a filter to resample a first data signal from a first segment of data in order to generate second sampled data signal in a second segment of data. The filter selector includes an adder which adds a resampling factor to a previous address value to generate a current address value if the previous address value is less than a comparator value and which subtracts the comparator value from the previous address value to generate the current address value if the previous address value is greater than or equal to the comparator value. The current address value is shifted by n bits, where n is an integer, to generate the filter address value.

Abstract: A marine drive (10, 310) has two counter-rotating propellers (12 and 14, 312 and 314). Inner and outer concentric counter-rotating propeller shafts (40 and 42, 340 and 338) are supported by a spool (38, 336) in the lower horizontal bore (28, 328). Passages are provided in the housing for communicating lubrication and/or exhaust with the horizontal bore. Locking structure (50, 404) holds the driven gears and bearings in place in the lower horizontal bore.

Abstract: A marine drive (10, 310) has two counter-rotating propellers (12 and 14, 312 and 314). Inner and outer concentric counter-rotating propeller shafts (40 and 42, 340 and 338) are supported by a spool (38, 336) in the lower horizontal bore (28, 328). Passages are provided in the housing for communicating lubrication and/or exhaust with the horizontal bore. Locking structure (50, 404) holds the driven gears and bearings in place in the lower horizontal bore.

Abstract: A marine drive (10) has a spool (36) positioned in the lower horizonal bore (28) and supporting a dual propeller shaft assembly (38, 40). An exhaust passage (130) includes a passage (132) in the drive housing (26) communicating with the horizontal bore (28) at the spool (36), and a spool exhaust passage (134) passing exhaust rearwardly through the spool to the propeller through-hub exhaust passages (136, 138), providing through-hub exhaust through dual propellers (12, 14). An oil passage (152) in the housing (26) communicates with the horizontal bore (28) forwardly of the exhaust passage (132) and lubricates the dual propeller shaft assembly.

Abstract: A sample rate conversion system converts from an input sample rate stream having a predetermined input sample rate to an output sample stream having a predetermined output sample rate by interpolating output samples from the input samples using first and second approximate sample rate ratios. The system includes circuitry which selects a sequence of interpolation filters from among a set of filters, the sequences being defined by one of these approximate ratios, and circuitry which monitors the magnitude of the accumulated error introduced by the approximation. When this accumulated error becomes greater than a threshold, the system changes to use a further sequence of interpolation filters based on the other approximate ratio. The accumulated error changes in a positive sense with each successive sample while one of the two approximate ratios is used. The accumulated error changes in a negative sense with each successive sample while the other of the two approximate ratios is used.

Abstract: The apparatus is configured as a dumbbell having an elongated hollow lifting bar with a pivotable handle for activating a wedge-shaped cam element mounted to the bar. The cam element longitudinally forces two rods carried in a passageway of the bar to move pin operator elements of each weight. Opposed sides of a weight respectively include a depression or cavity and a laterally extending boss with a boss of one weight fitting within a depression of an adjacent weight. Each boss carries a pair of diametrically opposed inwardly biased pins that are moved outwardly by the element to engage a grooved surface in the depression on an adjacent weight to secure the weights together. Oversized bar alignment rings with essentially identical grooved surfaces are engaged by the pins of a first weight in a series. A support base having a pair of convergent channels to accommodate the alignment rings guides the dumbbell into its resting place.

Abstract: A video signal processing system uses a sequence of interpolation filters to resample a 125M video signal to produce a 244M signal. In addition, the system allows an operator to specify a desired subcarrier-to-horizontal sync (SCH) phase and a desired horizontal position. The system automatically adjusts the starting point in the sequence of filters used for the resampling operation to implement each of the requested phase shifts.

Abstract: An improved freeweight locking mechanism employs a spring-biased lever having a locking end which blocks movement of the freeweight securing member from a first position whereby a weight is secured to a lifting bar and an operating end, which when contacted by the support frame for the weights, will cause the locking end to move a sufficient distance to allow movement of the weight-securing member to the release position. The member has a rib which defines two surfaces or shoulders to allow the member to be locked in either the weight-securing or weight-releasing positions. The movement of a weight away from the support frame allows spring bias to force the locking end of the lever into the locked position and this blocks accidental movement of the member from its weight-securing position.

Abstract: A system converts digital video signals between two digital video signal formats. The system includes a rate converter which receives digital samples of the video signal in the first format and at the clock frequency thereof and converts those signls to digital samples of the video signal at the clock frequency of the second signal format. The outputs of the rate converter are combined with appropriate coefficients in a digital filter to produce alternately coefficient modified chorma and luminance signals which are combined in an output circuit to produce the digital video signal in the second video signal format.

Abstract: Apparatus for improved alignment of the components of a freeweight barbell system include a weight tray employing spacing members for lateral support of the weights when stored upright thereon. The bar includes sleeves having shoulders to further align the weights when mounted on the bar. Guide channels include rearward downwardly disposed ramps to minimize contact of the weights with the tray surface until the bar has been moved to the rearward position. Interior weight support channels minimize bending of a weighted bar to ease movement and prevent lateral misalignment of the weights. Two alternate retaining clips are provided to improve the securing of the weights which themselves have been reformed to also improve support, guidance and alignment of the weights whether stored or secured to the bar.

Abstract: A split phase cam-controlled weight lifting exercise machine employs two independently selectable weight stacks connected by cable and pulley assemblies to a respective phase of the cam. Exercise arms are pivotally mounted for pivotal movement of the cams to which are connected the cables in a manner to provide for a different moment arm for one loaded weight than for the other during a part of the exercise. The weight loading is selected by a pin that fits through the weights and a guide rod mounted so as to not contact the weights and cause friction that degrades the benefits of the split cam operation. The guide rod is mounted on bearings that limit movement to the vertical direction. The weights include integral interlocks to align them vertically in a stack.

Abstract: A barbell weight lifting apparatus comprising a plurality of spaced weights stored on spaced apart support trays and arranged in two horizontal rows on a frame, the weights each having an identically positioned horizontal slot therein and a vertically disposed pin mounted in therein for securing the weights to a lifting bar. The lifting bar has a rotatable collar on each end with spaced circumferential grooves cut therein in positions to be in line with the pins in the weights when the lifting bar is positioned in the slots. The lifting bar has round wheels attached to the ends thereof which rest in a guide channel on each end of the frame and cooperate with a pair of spaced alignment bar mounted on the frame for control of the motion of the lifting bar to maintain the lifting bar in proper alignment with the frame and the weights during weight loading and unloading procedures. Weights not selected for attachment to the lifting bar are prevented from movement off the frame by a horizontal safety bar.

Abstract: When tape in a VTR moves in the same direction as the direction of peripheral motion of a headwheel across which the tape passes, release of one end of the tape during rewind may cause the tape to whip around the headwheel and jam. The tape accumulation resulting from the motion is accommodated by a tapered open-ended tunnel. After accumulation in the tunnel, the tape is reeled in by the take-up reel.

Abstract: A motorcycle fairing is disclosed herein which comprises a one-piece, formed or molded sheet of plastic, such as acrylic or fiberglass, having portions which extend in front of and above the motorcycle handlebars, and further including leg portions which extend downwardly along the opposite sides of the front fork of the motorcycle. The leg portions include panels pivotally attached thereto and positionable to direct air onto the engine or the rider in warm weather and to seal off the air in cooler weather. The motorcycle fairing is attached to the handlebars with brackets, and also with a gasket which extends along the inside edge of the fairing and engages the front fork and lights of the motorcycle. The gasket aids in securing the fairing to the motorcycle, absorbing vibrations due to the road and motorcycle, and permits the fairing to fit different size motorcycles.

Abstract: A motorcycle fairing is disclosed herein which comprises a one-piece, formed sheet of acrylic plastic having portions which extend in front of and above the motorcycle handlebars, and further including leg portions which extend downwardly along the opposite sides of the front fork of the motorcycle. The bottoms of the leg portions are shaped to direct air which confronts a moving motorcycle downwardly and toward the intake manifold of the motorcycle engine. The top of the fairing includes a lip which directs air upwardly and over the head of the motorcycle rider. The motorcycle fairing is attached to the handlebars with brackets. The fairing further includes a gasket which extends along the edge of the fairing and engages the front fork and lights of the motorcycle.