Abstract: The disclosure is primarily directed to the reduction of excavating tooth and chain drag which makes possible the manual transport and manual propulsion of a ditcher through the earth to commercially acceptable specifications.
Abstract: Improvements in protective footwear, including work boots or shoes, are disclosed. The improvements include a new heel filler for the heel portion of the sole, the filler being formed of a light-weight moulded plastic material. The heel filler may be easily located in the heel area prior to the final boot forming step. When a shank or protective mid-sole is to be used the appropriate element is provided with a slot or other locating device which may be secured to a cooperating projection on the heel filler so that the two components may be positively located together prior to the final boot forming step. The boot is strengthened by providing a longitudinally extending rib or ribs in the arch region of the shank or mid-sole. The boot is less expensive to produce because there is less possible wear or damage in the production equipment. In addition there are fewer production rejects and the resulting boot is stronger than prior art boots.
Abstract: A combine tooth is attached to a combine belt by means of a bolt having an enlarged, substantially planar head. The base portion of the tooth has a recess carrying a friction plate. The belt is tightly clamped between the bolt head and the friction plate.
Abstract: A spectacle frame of one-piece molded plastic construction for film-like lens, e.g., lens used in viewing 3-D movies, includes a pair of temple pieces connected by a crossbar and a lens frame and bridge piece joined to the crossbar by a hinge web. A latch integral with the crossbar engages the bridge piece when the spectacle is in use.
Abstract: Porpoising control in a high speed planing hull is effected during straight, on plane running and in turning maneuvers by a novel configuration of aft tapered wedges bridging the aft, exit ends of the outboard and next adjacent, inboard running surfaces.
Abstract: A convertible traction device for permitting a road vehicle to be used in an off-road configuration is described. The device is provided as a trailer having a pair of retractable road wheels with a pair of traction belt assemblies mounted thereon. The traction belt assemblies each include an endless belt, a plurality of support wheels about which the belt is entrained and a supporting framework, each assembly being pivotally attached to the trailer chassis. During towing the road wheels support the trailer on the ground with the traction belt assemblies being held in a retracted position above the trailer platform. For off-road use the traction belt assemblies are pivoted downwardly until the belts engage the ground, the assemblies are locked in position and the road wheels are retracted. The vehicle is driven onto the platform so that the drive wheels thereof engage drive rollers mounted in the trailer chassis, which rollers, as the vehicle's drive wheels rotate, impart driving movement to the traction belt.