Abstract: A door security device includes a support bar, a first support member, a second support member, and an engagement portion. The first support member is provided on one end of the support bar and is adapted to abut against a surface of an associated door. The second support member is provided at another end of the support bar and is adapted to abut an associated structural surface. The engagement portion is secured to the support bar and is configured to releasably engage a door part of the associated door or an emergency entry device affixed to the associated door. The engagement portion applies a pulling force on the door part in a direction toward the support bar.

Abstract: An outdrive system for water craft includes in an embodiment use of plastic or other relatively flexible material, e.g., compared to metal, as a housing material, and techniques which enable and/or at least facilitate use of such housing material. Several of those techniques employ a flexible member, such as a belt, to couple power between the input and output of an outdrive, and heat conducting back bending surfaces to urge the belt legs toward each other and to remove heat from the outdrive, an anti-shear stuffer or fence to reduce energy losses such as heat, and lubricant requirements, and/or an eccentric mechanical tensioning device for the belt. The invention also relates to use in a vehicle drive, especially for water craft, of housing materials a substantial part of which are not subject to corrosion, galvanic action and the like.

Abstract: An outdrive system for watercraft includes use of plastic or other relatively flexible material, e.g., compared to metal, especially as a housing material, and techniques which enable and/or at least facilitate use of such housing material. One of those techniques employs a flexible member, such as a belt, to couple power between the input and output of an outdrive and another employs a cooling system to remove heat. The invention also relates to use in a vehicle drive, especially for watercraft, of housing materials that are not subject to corrosion, galvanic action and the like.

Abstract: A propeller includes a rotatable hub with a plurality of sockets, blades with roots that fit in the sockets and a plurality of pitch blocks which fit between the blade root and the socket walls. Hubs with two, three, and four sockets are shown. The blades have no twist and are formed of molded, glass reinforced nylon. The pitch blocks are also nylon and different pairs of pitch blocks may be used to hold the blades at different angles. All nylon components are designed to minimize stress concentrations. The hubs although also of nylon have steel reinforcing plates within them which take the centripetal forces. These forces are transmitted through bolts to passage walls in the pitch blocks, and from the pitch blocks through interengaging teeth to the blade roots. A snap on, snap off aerodynamic spinner is also provided.

Abstract: 1. A steam boiler-reactor comprising;A. a cylindrical casing having closures at opposite ends thereof,B. a steam generating tube, formed in a helical coil, disposed adjacent the nner surface of said casing and extending substantially between its opposite ends, said coil having an inlet end to which feed water may be delivered and an outlet end from which steam may be delivered to a steam engine,C. a cylindrical screen disposed within and adjacent the helical coil,D. an elongated oxidant injector nozzle tube, having a row of axially spaced injection orifices, extending longitudinally of said casing and within the space within said screen,E. a solid grain of cast lithium substantially filling the remainder of the space within said screen,F. an oxidant comprising a source of sulphur hexafluoride under pressure communicating with said nozzle tube through a valve adapted to control the rate of flow of same,G.