Abstract: A speed change pulley is disclosed in which, for relative centering of the movable side plate with respect to the diaphragm, the diaphragm is provided with engagement members projecting therefrom and axially received in notches in the movable side plate. The engagement members also comprise weight members for enhanced sensitivity to centrifugal force.

Abstract: An improved drive assembly for a powered chain saw or the like, which drive assembly includes a drive sprocket having a hub portion centrally and presenting a hub extension at one end for coaxially registering within the centered opening of the end wall of a clutch drum, and an axially extending apertured reinforcing washer disposed between the teeth of the sprocket wheel and surrounding the tips thereof in the region of abutment of the drive sprocket and clutch drum so as to register within the recesses of the sprocket teeth and present an extended joining area therebetween for securing same against separation.

Abstract: A belt tensioning device including a mounting bracket, a pulley support arm pivotally mounted at one end on the mounting bracket and having an idler pulley rotatably mounted at its other end. A spring yieldably biases the arm in a direction to press the idler pulley against the belt. The arm has opposed wall faces disposed in planes perpendicular to the pivot axis of the arm and mounted on the bracket and have pad faces pressed into engagement with respective ones of the opposed wall faces on the arm to dampen vibration or oscillation of the arm.

Abstract: A torque-sensing pulley is disclosed wherein one of the pulley sections is attached to a central shaft, the other pulley section has a cam operatively connected to a matching cam carried by the shaft, means are provided for biasing the cams apart and biasing the pulley sections together, and including damping means for preventing sudden change in the axial spacing of the pulley sections.

Abstract: Complementary relatively stationary pulleys having axially oppositely stepped diameter portions form a variable speed drive between a motor coupled with one stepped pulley and a driven device coupled with the oppositely stepped pulley such as the spindle of a drill press on which the device is mounted. A transmission belt for the stepped pulleys is bodily shifted with an associated belt tensioning idler pulley, a belt shaper guide, and a compression belt former selectively to position the belt in alignment with chosen diameter portions of the two stepped pulleys to effect a desired speed change while the belt is in a deformed state out of contact with the stepped pulleys, following which the belt is retensioned to engage it with the chosen stepped portions of the complementary stepped pulleys.

Abstract: An automatic transmission case is formed with a power output shaft support hole including a bearing portion and a sealing portion, and is further formed with a lubricating oil supply hole. A power output shaft formed with an axial through hole and at least one radial hole for conducting lubricating oil is assembled into the power output shaft support hole. A sleeve formed with a circumferential groove in its outside surface is fitted closely over the power output shaft from the side of the sealing portion, and a seal ring is mounted and received in the circumferential groove and in contact with the second portion so as to seal the annular space in the power output shaft support hole around the power output shaft, the sleeve including an oil communication passage extending between the lubricating oil supply hole in the case and the radial hole in the power output shaft.

Abstract: A portable tent adapted to be mounted on the top of a vehicle having a rigid roof, with a pair of transversely extending supports thereon, with the portable tent comprising a rectangular support frame including a horizontal flange, a peripheral flange, and the support frame adapted for positionment across the supports, with a floor mounted within the support frame and extending on the horizontal flange for supporting the user of the tent. A flexible water repellent canopy is provided and includes a base and upwardly extending walls joined together, and having an opening along one of the walls to gain access to the canopy, with the base extending in overlapping relationship to the floor.An upwardly extending collapsible frame is adapted to extend within the canopy in an assembled position supporting same during use thereof, and readily dis-assembled when not in use.

Abstract: A collapsible umbrella which is detachably mounted to the shoulders of a garment so as to be supported above the head of a wearer of the garment, in the opened position of the umbrella. A pair of semi-rigid strut members are pivotally mounted each to a tip of an opposed umbrella rib and to a hinged bracket fastened to an external top shoulder section of a garment with a pair of flexible tension members, one fastened to the top of a forward umbrella rib and the other to a top of a rear umbrella rib each fastened respectively to a forward and a rear section of the garment. The ribs are each pivotally joined by individual semi-rigid stretcher members to a tubular handle that is slidably mounted over a central post to the top of which the ribs are all pined such that sliding of the handle towards the top of the central post extends the umbrella ribs.

Abstract: A vertical sleeve secured to a side of a structure on which a man is working receives and supports the lower end portion of a pole that has a much longer inclined upper portion so that its upper end will be directly above a point spaced laterally from the sleeve. A safety line suspended from the upper end of the pole is connected to a safety belt worn by the workman and is long enough to permit him to work close to the sleeve. The pole is rotatable in the sleeve to allow its upper end to be moved in an arc around the sleeve to increase the size of the area in which the man can work.

Abstract: A double walled tent is supported by outwardly leaning pairs of arches and an interconnecting flexible ridge member. The ridge member is associated with the outer wall or cover, so that the outer wall may be tensioned to form the shelter. An inner wall or cover is suspended from the outer wall by netted webbing which allows circulation between the walls.

Abstract: A self-supporting inflatable structure useful, for example, as an inexpensive, readily assembled planetarium, such structure being made of an extensible material having a plurality of panels, each shaped so as to form, when inflated, a hemispherical dome-like structure. A first channel, also made of extensible material is used to supply air, as from an inexpensive, conventional window fan for inflating the structure and a second channel permits the exit of such air in a controlled manner while at the same time acting as an entrance/exit channel for persons using the inflated chamber.The extensible material is preferably formed of co-extruded, or laminated, opaque plastic sheets, one sheet having a white surface for use as the interior display surface of the planetarium and one sheet being black to prevent light entry into the chamber. The air input and exit channels have a curved configuration which prevents light from entering into the inflated chamber.

Abstract: A portable device for covering vehicles comprising attaching clamps for connecting to the front and rear of the vehicle, extendable rods attached at one end to the clamps and extending above the vehicle, and a waterproof covering extendable over the vehicle and attachable in a fixed position at either end to the rods.

Abstract: A pair of slotted, sector-shaped centrifugal weights 7, 8 are radially slidable on posts 5, 6 upstanding from a disk 4 mounted on the drive shaft 2 of a reversible electric motor 1. A cup member 11 carrying a pinion gear 13 is rotatably journalled on the shaft, and includes a cylindrical wall 11a surrounding the weights. A reduction gear mechanism 12 transmits the rotation of the pinion gear to a pivotally mounted sector gear 16, to which a linearly movable actuating rod 17 is connected. Alternatively, a plurality of sector-shaped weights 27 may be accomodated in similar shaped cavities between a pair of radially partitioned discs 24a, 24b.

Abstract: A safety working lanyard interconnects with a D-ring on a safety belt to provide a safety line that is versatile and readily adjustable in length while in use. End hooks connectable to the D-ring are secured to each end of a length of safety line, and a working hook has an eye that is freely slideable along the length of the line and is also trapped between the end hooks. The end hooks are sized to pass through the D-ring on the belt and connect to the working hook, which is too large to pass through the D-ring and large enough to hook onto a ladder rung.

Abstract: The walker disclosed herein comprises one equipped with wheels and is hinged at one or two front vertical supports so that it may be easily folded for carrying or for storage. In spite of its collapsible design, the walker is equipped with a locking device to prevent inadvertent folding, the locking device being one which is easily put into or removed from its locking position.

Abstract: A self-locking hinge for use as a pivotal connector between two pivoted members and adapted to lock the members in a fixed angular relation. The hinge comprises a pair of circular plates that are rigidly affixed to opposite faces of one member and rotatably connected to the other member. The circular plates are used to laterally support both of the members and to guide the other member as it is rotated from a folded position to a fully extended position. The hinge is locked in the fully extended position by means of a locking ring that is slidably engaged with the other member. When such other member is fully extended, the ring engages corresponding locking indentations at the periphery of the circular plates and thereby blocks the movement of the other member in one angular direction. The movement of the other member is blocked in the opposite angular direction due to the abutting of the hinge ends of the members.

Abstract: A portable shelter including a plurality of sidewall framing sections, a plurality of connectors joining adjacent sidewall sections to form spaced parallel vertical sidewalls, a plurality of arched crossmembers joining the top portions and the end portions of the spaced vertical sidewalls, crossbrace members extending between adjacent end portions of the spaced sidewalls, and a covering of a flexible sheet material disposed over the assembled sidewall sections and arched crossmembers; the sidewall framing sections being formed of four straight lengths of tubing affixed perpendicular to each other with the ends of each length of tubing extending a significant distance beyond the crossing point thereof with lengths of tubing perpendicular thereto, certain of the sidewall framing sections being of a square configuration of equal height and width and having a length of tubing disposed intermediate and parallel to the lengths of tubing forming opposite sides of the sidewall sections, and other of the sidewall sect

Abstract: A collapsible shelter structure having a pair of collapsible frame members disposed at opposed ends thereof for supporting panel means which extend therebetween, wherein the collapsible frame means include a braced lazy-tong structure which is designed to maintain the frames in erect disposition, and wherein bracing strut means are pivotally coupled to alternate outer apices of the lazy-tong structure for rendering the frame means both stable and rigid. To further enhance rigidity of the erect structure, the inner apices are normally formed as a straight angle when the shelter structure is in erect form, with these inner apices forming a series of spaced points along a semicircle of fixed radius. The collapsible shelter means may be taken down and stored in collapsed form when desired, with generally rigid or durable base side panels being provided to protect the structure from inadvertent damage during use and during storage.

Abstract: A cover which may be removably installed over a vehicle including a shroud mounted on an umbrella-like frame which fits in close relationship to a vehicle to be covered. The frame may include a plurality of supports or ribs extending outwardly from a central hub and downwardly so as to generally encompass a vehicle which may be covered. An extensible means may be provided to join some or all of the support ribs about the lower ends thereof in order to firmly hold the cover in place. An articulated lever-like handle may be mounted on the hub. The lever may be locked so that its sections are in linear relationship, thereby facilitating lifting one cover over a car during installation or removal. A slidable latch is illustrated for locking the lever in its linear configuration. A spring biases the articulated sections of the lever into the linear relationship.

Abstract: A vaulted membrane structure that has a series of substantially curved vertical arches that can be arranged in a modular construction to support a flexible membrane that is attached to the arches and tensioned between them in a formed inward depression to minimize vibration and flutter and to increase its ability to withstand heavy live loads such as snow or pulsating loads created by high winds.This construction applies particularly to comparative small shelters where the membrane can slide in its fastener on the arch, or slide along the arch to stretch the membrane over the arches when it is fabricated in one piece or in multiple sections.The membrane is tensioned in several ways: by pulling the membrane towards the base or by pulling the arches apart by anchor lines and/or by end closures that are fastened to the base, or by adjustable purlins or jacks between arches to force them apart. A combination of two ways is also used.