Abstract: A no-slip, imposed differential uses a first unlimited slip differential 15 connected for driving a pair of axle shafts 16 and 17 and a second unlimited slip differential 20 connected between a pair of control shafts 22 and 23. One of the axle shafts and one of the control shafts are connected for rotation in the same direction, and the other axle shaft and the other control shaft are connected for rotation in opposite directions. An input control gear 40 meshed with a ring gear 21 for second differential 20 can rotate control shafts 22 and 23 to impose differential rotation on axle shafts 16 and 17 via the shaft connecting means. This provides a no-slip drive when control gear 40 is not turning and a steering drive by imposed differential rotation when control gear 40 turns. A clutched power take-off 82 can direct propulsion torque to the steering control input for rapid pivot turns.

Abstract: A double-walled plastic box 20 is molded from a single parison 50 in an unlimited depth by closing and holding a bottom region of the parison at the bottom of a cavity 30, bringing together parts of a core 40 above the cavity to close off an upper region of the parison, moving the core, the cavity, or both vertically to position the core within the cavity and invert the parison so that a lower region of the parison forms an outside wall of the box against an inside surface of the cavity and an upper region of the parison forms an inside wall of the box against an outer surface of the core. The parison is then blown into a double-walled box 20 in the shape of an enclosed space between the cavity and the core.

Abstract: A glide (10) for a shelf (25) of a mini-load warehouse rack has a bearing plate (12) held in place on the shelf by a detent (24) raised up from the upper surface (26) of the shelf and fitting a hole (18) in the bearing plate. A clip (14) on an edge (15) of the guide fitting around an inner edge (27) of the shelf resiliently engages an underside (28) of the shelf to hold the bearing plate in its locked position on the detent. Trays (30) can slide in and out on the shelf glides without dislodging the bearing plates from the detents.

Abstract: An air conditioner condenser manifold uses a tube having a flat side and a semi-oval cross-sectional shape, with holes pierced into the flat side of the tube without removing any material from the tube. The material of the flat side of the tube within an indentation around each of the holes is formed into a cylindrical collar recessed into the tube and having an inside axial length longer than the unpierced thickness of the tube. The ends of smaller tubes are bonded into each of the collars so that bonding material is disposed in the indentations around the holes.

Abstract: A purging and recharging system improves the repeating of detonations from a detonation device 10 having a detonation chamber 20 separated from an ignition chamber 25 by a detonation plate 22 having an opening 23 through which a flame jet can pass from ignition chamber 25 to detonation chamber 20. A differential piston 30 driven by a detonation in a differential cylinder 31, 32 around detonation chamber 20 affords a fluid passageway between differential piston 30 and detonation chamber 20. On a power stroke, differential piston 30 compresses recharging air and draws in cooling and exhaust purging air to surround detonation chamber 20. On a return stroke, differential piston 30 forces cooling and purging air into detonation chamber 20 and then admits compressed recharging air into detonation chamber 20.

Abstract: An automatic focusing microscope switchable between light-field and dark-field positions, so designed that the automatic focusing is operative in the dark-field condition or mode as well as in the light-field condition. In a first embodiment, auxiliary illumination of special wavelength (infrared or ultraviolet) used for the automatic focusing is reflected into the illumination-light ray path or beam, and in the dark-field mode the central portion of this beam is intercepted by a filter member which is opaque in the visible spectral region but transmits in the spectral region of the auxiliary illumination used for the automatic focusing function.

Abstract: A multi-axle vehicle steer drive system divides driving torque with a driving differential 15 and steering torque with a steering differential 20 and combines the divided torque outputs additively on one side of the vehicle and subtractively on the other side of the vehicle. This produces steer driving torque distributed via axle differentials 50 and 51 between left and right side drive axles. By using unlimited-slip differentials for dividing the driving and steering torque and no-slip differentials for distributing the steer driving torque between drive axles, the vehicle applies torque to the wheels with the best traction and drives all wheels proportionally to their tracking ability.

Abstract: A combination brake light and convenience light for use in the rear of an automotive vehicle is disclosed. A brake light 8 faces and illuminates through the rear window 4, and the convenience light 14 faces forward and downward over the shoulder of a rear seat occupant. A hinged cover 20 over the convenience light 14 serves three purposes: it esthetically covers the light when not in use; it prevents direct incidence of its light upon the driver's rear view mirror or the driver's line of sight; and it operates the on-off switch for the convenience light.

Abstract: Automatic starting of a hydrokinetic amplifier 10 is accomplished by: an overflow pilot valve 32 responsive to output pressure for opening an overflow line 30 when output pressure drops below a predetermined level; and a start-up pilot valve 36 responsive to reduced pressure within amplifier 10 upon opening of overflow pilot valve 32 so that the reduced internal pressure opens the start-up pilot valve and admits vapor into the amplifier to merge with the already flowing liquid and start up the amplifier. Preferably a safety pilot valve 38 arranged in the vapor input line 13, in series with start-up pilot valve 36, closes the vapor input line whenever liquid input pressure to the amplifier falls below an adequate level.

Abstract: A method used for the inspection of semiconductor structures under a light scan microscope which scans the surface of the wafer or other specimen (12) with a beam of light which is focused in spot form by the objective (18). In order to produce a dark-field image in which the linear semiconductor structures of the wafer are suppressed and only defects and particles of dirt are visible, the signals of four detectors (10a-10d) arranged outside the illuminating aperture of the objective within the channel of the dark-field ring condenser (6) are subjected to a logical "and" operation.

Abstract: An eyeball fitting 10 for directing return water into a swimming pool has an eyeball 20 with a smooth and even inside surface 25 curving continuously from an entrance opening 26 to a discharge opening 21 having a sharp edge 22. The curvature of inside surface 25 has a radius that gradually increases as inside surface 25 gradually diminishes in cross-sectional area proceeding from larger diameter entrance opening 26 to smaller diameter discharge edge 22. Fitting 10 includes a seat 30 having a spherical recess 33 to receive a spherical outside surface 24 of eyeball 20, and seat 30 has an internal surface 35 continuously curving at a gradually increasing radius of curvature proceeding from an entrance side toward the spherical recess 33.

Abstract: A mounting fastener 2 which includes various combinations of base plate 30, mounting bracket 4, and fastener 18 is disclosed. The mounting bracket 4 is a formed wire bracket to provide the stand-off distance between a supporting structure and a mounted panel. Mounting bracket 4 has a pair of parallel feet 6 and a pair of parallel legs 8 extending upward from these feet and a yoke 10 joining the legs in a generally transverse plane (which may or may not be parallel with the feet 6) over the feet, yoke 10 defining a collar 14 into which fastener 18 is resiliently snapped. Opposed tips 16, one extending at the end of each foot 6, adapt mounting bracket 4 for resilient snap engagement to a panel member. Bracket 4 snaps into engagement in channels 38 and tip holes 40 of the base plate 30. A simpler form of bracket 50 is adapted to hang on a supporting structure, also effecting the spacing of the mounted panel from the supporting structure.

Abstract: A microscope for examinations and surgical operations on the eye, having provision for projecting onto the eye a hollow beam of illuminating light, the beam having a dark center portion of the same diameter as the pupil of the eye. Thus the surgeon may have adequate illumination of the external surface of the eye around the pupil, without projecting light which might be disturbing or damaging to the patient, onto the retina or fundus of the eye. The light blocking structure, in the form of an annular diaphragm with a light-impervious central portion, is located in the illuminating light beam at a point which is conjugated with respect to the object plane, i.e., the plane of the pupil of the eye being examined. The diaphragm may be moved aside to an ineffective position when required.

Abstract: A detonating impact tool 10 has a manual recycler that works by manually pressing the tool and a fastener 25 against a work piece 51 to push a front housing 12 into a main housing 11 against a compression spring 30. This charges a detonation chamber 15 with a fuel and air mixture that is precompressed and detonated to drive a piston 20 and its impact rod 22 forward, driving the fastener into the work piece. On completion of its impact stroke, the piston clears an exhaust port 31, allowing exhaust gases to escape through an exhaust passageway 32. Following this, purging air rushes in through inlet 27 as the exhaust gases collapse; and as the tool is retracted from the work piece, pumping seal 26 draws purging, cooling, and recharging air into detonation chamber 15 as front housing 12 is returned to its forward position by the spring.

Abstract: A particularly durable and thermally stable chassis (housing, frame, or body) for optical instruments is obtained by the use of compacted ceramic material. The coefficient of thermal expansion of this material can be made equal to that of the optical glass used. It is particularly favorable to develop the chassis as a three-dimensional hollow structure.

Abstract: For mounting relatively thick wheels ("mag" wheels, etc.) on the hubs of motor vehicles, a sleeve is provided, internally threaded to screw onto the mounting stud, and externally formed as a smooth cylinder dimensioned to fit snugly in the stud hole of the wheel, the sleeve being of a length to extend only part way (usually about half way) through the thickness of the wheel. The sleeve is screwed onto the stud tight against the hub. When the wheel is placed on the sleeves (one on each stud, of course), the lug nuts are then placed on the studs and tightened as usual. The sleeves are of such length relative to the lengths of the cylindrical shanks of the nuts that there is a slight gap between sleeve and shank. The sleeve supports that portion of the wheel thickness closest to the hub, and the shank of the nut supports that portion farther from the hub.

Abstract: A basketball return device 20 is formed as a resilient deflector having an upper wing 30 positioned behind a basketball net 15 and a lower wing 35 positioned below the bottom of basketball net 15, device 20 being hooked onto the rim 11 and braced under a bracket 12 that supports the rim on a backboard 13. A pair of resilient loops 22 extend between a brace 25 engaging the underside of bracket 12 and hooks 21 that are spaced apart to hook over rim 11 on opposite sides of the bracket. The device can be formed of resilient resin material to be deformed by engagement with a basketball and to spring back to direct the basketball back toward its shooter.

Abstract: An overhead projector transparency transport system uses a transparent platen 20 extending over projection window 11 and beyond both sides of projector 10. A transparent belt 80 made of a base web 84 and a pocket web 85, fused together to form a series of pockets, receives a sequence of transparencies 100, and transverse fold lines formed between pockets 81 allow belt 80 to fan fold. Pocket web 85 is fused to base web 84 at inturned edges 95 of an open side 96 of each pocket 81 to trap a transparency 100 within its pocket, once inserted. Platen 20 is positioned so that transparent belt 80 can advance across platen 20 from a fan-fold supply stack 82 next to projector 10 and proceed to an automatically formed take-up stack 83 next to the other side of projector 10.

Abstract: A rotor 20 having several impellers 21 interleaved with a multi-stage stator 30 pumps ambient air through each stage in a path that flows radially outward through impeller vanes 27 against a stator wall 32 where the air is retroverted and directed radially inward through a stator passageway 36 to the next rotor impeller 21. Flow through each stage increases air temperature so that the output air, in addition to being blown forcibly enough to pass through ductwork, is warmed enough to afford space heating.