Abstract: A binoculars has lenses carried by sheet structure defining a box that is foldable between collapsed position and focus adjusting extended positions; the box in adjustable extended position having front and rear walls carrying the lenses; the box in extended position having top and bottom walls each defining fold lines, and also having left and right side walls defining fold lines; the fold lines enabling folding of the box from extended to collapsed position, during which the top and bottom walls move relatively apart and the left and right walls move relatively toward one another; the left and right side walls having fold connection to the top and bottom walls to block light entrance into the box interior in each of the referenced extended positions.

Abstract: A motorcycle exhaust pipe heat shield structure comprising a series of telescopically interfitting semi-annular shield members defining a lengthwise elongated shield sized to fit over the outer side of the exhaust pipe; and a rod extending adjacent the members and connected thereto; the rod being bendable, accompanied by relative angular adjustment of the members, to conform to a bend or bends in the exhaust pipe; the shield being attachable to the exhaust pipe, to extend lengthwise thereof, and at the outer side thereof.

Abstract: An ignition system for a motorcyle two cylinder internal combustion engine includes magnetically coupled primary and secondary coils, spark plugs at the cylinders, a source of electrical current, and first and second pairs of contacts respectively controlling electrical current flow to the primary coil for producing high voltage output from the secondary coil to be delivered to the spark plugs; the system includes a rotary cam driven by the engine for controlling opening of the contacts, the cam rotatable about a first axis; first and second carriers respectively carrying the first and second contacts, and adjustably rotatable about that axis; and non-rotary support structure to which the carriers may be connected, in adjusted positions of the first and second contacts about the first axis; whereby the timing of spark effected ignitions by the spark plugs may be controlled.

Abstract: A tank oil drain device comprises a drain receptacle associated with the tank, the receptacle defining a bore having a mouth opening to the tank exterior, the receptacle having a first port communicating between the tank interior and the bore; a plunger received in the bore, and a spring urging the plunger toward a position in the bore in which the first port is blocked; a seal normally sealing off between the bore and the side of the plunger at a location between the first port and the mouth; and lock structure carried by the receptacle, near the mouth, for retaining a tubular drain plug pushed into the bore for displacing the plunger in the bore sufficiently to unblock the first port thereby establishing oil draining communication via the first port and the plug to the exterior. The first port remains blocked by the plunger while the seal engages and seals off about the drain plug through a predetermined range of movement of the drain plug in the bore.

Abstract: An oil filtering apparatus includes a check valve at the bottom of and within a cylindrical porous filter unit, to pass oil directly into an oil tank in case of clogging of the filter unit or cartridge. Channeling in the check valve inverted cap by-passes flow around the valve within the cap, when the valve is depressed; and a well formed around the cap collects dirt and other particles, within the filter unit lower interior.

Abstract: Valve apparatus for controlling flow of fluid via one or the other of two inlets defined by said apparatus, and via one or the other of two outlets defined by said apparatus, includes: a body defining a cavity; and a rotor defining porting, and rotatable in the cavity between a first position in which porting in the rotor communicates between one of the inlets and one of the outlets, and a second position in which porting in the rotor communicates between the other of the inlets and the other of the outlets; and an annular collector extending about the rotor and having an annular plenum with a discharge opening, the plenum adjustably rotatable about the rotor to angularly orient the discharge opening; the body having a through passage remaining in communication with the annular plenum as the annular collector is adjustably rotated, the through passage selectively alignable with one of the outlets in the first position of the rotor, and selectively alignable with the other of the outlets in the second position

Abstract: An improved hub assembly construction enables quick replacement of bearing and/or seal parts of a motorcycle wheel hub assembly; it basically includes a novel hub and flange for a motorcycle spoked wheel, and incorporates: a tubular hub adapted to be received and mounted on an axle, the hub defining an axis; two flanges rigidly mounted on the hub, the flanges having inner annular portions extending generally radially, and outer annular portions that extend angularly axially and radially, the outer portions defining holes spaced about the axis to receive spokes; the hub having opposite end portions and defining a bore between the end portions, and second counterbores at the respective end portions, each first counterbore located between the bore and a second counterbore; a bearing assembly located in each first counterbore, each such assembly including an annular outer race fittingly received axially by its respective first counterbore, an annular inner race spaced radially inwardly of the outer race, and roll

Abstract: Freeze resisting valve apparatus, for controlling water flow, includes: a vertically elongated, hollow valve body having a lower portion adapted for installation underground, the body having a lower water inlet associated with that lower portion, and an upper water outlet, for passing a stream of pressurized water through the body; a water reservoir adapted for installation underground and having communication with the body lower portion via a port; a valve seat in the lower portion of the body and having a narrowed passage positioned to increase pressurized water flow velocity in proximity to the port; and a stopper movable toward and away from the seat to effect drainage of water in the valve body downwardly past the stopper to the reservoir when the stopper is closed on the seat, and to effect inducing of water flow from the reservoir and into the stream via the seat passage when the stopper is retracted from the seat.

Abstract: An adjusting tool is easily usable on valve stem pusher structure to enable gap indication and adjustment. A socket grips a nut associated with that structure; a gripper locks the socket on the nut; and an indicator on the gripper indicates the gap dimension as the gripper is moved toward and away from the valve stem structure with the socket locked on the nut. The tool is also usable for other purposes.

Abstract: A chain tensioner comprises a plunger yieldably urged and displaceable in one direction to transmit chain tensioning force to a chain, and a wedgable means co-acting with the plunger to block its retraction. Body structure associated with the plunger and wedgable means may incorporate an outer body and an inner body movable relative to the outer body and defining a ramp surface engaging the wedgable means.