Abstract: Data items such as files or database records associated with particular applications (such as messaging applications and other applications) can be stored in one or more remote locations, such as a cloud storage system, and synchronized with other devices. The remote storage can be configured such that each application executing on a client device can only view data items stored at the remote location to which the application has permission to access. An access manager on each client device enforces application specific access policies. Storage at the remote location can be secured for each application associated with a user or user account, for example, using isolated containers. The cloud storage of data can be anonymized and anonymous group data can be stored in the cloud storage.

Abstract: There is provided a safety switch having a housing configured to receive a removable key, and a mechanism arranged to be operated when the key is moved from an engaged position to a partially disengaged position, the mechanism being arranged to cause a signal to pass to a separate apparatus, wherein the safety switch further comprises a lock which is controlled by the separate apparatus and is arranged to prevent the key from being fully disengaged from the safety switch until a signal has been received in response from the separate apparatus.

Abstract: There is provided a safety switch having a housing configured to receive a removable key, and a mechanism arranged to be operated when the key is moved from an engaged position to a partially disengaged position, the mechanism being arranged to cause a signal to pass to a separate apparatus, wherein the safety switch further comprises a lock which is controlled by the separate apparatus and is arranged to prevent the key from being fully disengaged from the safety switch until a signal has been received in response from the separate apparatus.

Abstract: A rocket engine assembly is provided for a vertically launched rocket vehicle. A rocket engine housing of the assembly includes two or more combustion chambers each including an outlet end defining a sonic throat area. A propellant supply for the combustion chambers includes a throttling injector, associated with each of the combustion chambers and located opposite to sonic throat area, which injects the propellant into the associated combustion chamber. A modulator, which may form part of the injector, and which is controlled by a controller, modulates the flow rate of the propellant to the combustion chambers so that the chambers provide a vectorable net thrust. An expansion nozzle or body located downstream of the throat area provides expansion of the combustion gases produced by the combustion chambers so as to increase the net thrust.

Abstract: An extruder and methods for converting pressurized liquid CO.sub.2 feed into dry ice pellets of predetermined shape and size, wherein the CO.sub.2 snow formation, CO.sub.2 snow compaction, and dry ice pellet extrusion phases occur simultaneously to achieve production rates on the order of 700-1000 lbs/hr. The increased production rates are achieved utilizing sintered plastic filter media to provide enhanced removal of CO.sub.2 gas from the CO.sub.2 snow formation chamber.

Abstract: An extruder for converting pressurized liquid CO.sub.2 feed into dry ice pellets of predetermined shape and size, wherein the CO.sub.2 snow formation, CO.sub.2 snow compaction, and dry ice pellet extrusion phases occur simultaneously to achieve production rates on the order of 700-1000 lbs/hr. The compacted CO.sub.2 snow may be in the form of a solid cartridge or irregularly shaped solids, and such compacted particles may constitute an end product by themselves. The increased production rates are also achieved by enhanced removal of CO.sub.2 gas from the CO.sub.2 snow formation chamber, and use of a bidirectional internal regeneration cylinder to provide compactive force. The extruder is portable, since it only weighs approximately 1000 lbs., can be powered with a non-stationary energy source, and may be used to remanufacture partially sublimated dry ice solids into extruded dry ice pellets of a predetermined shape and size.

Abstract: An amplified mixer-blower device for discharging a feed material at high velocity and enhanced volume using a venturi transport principle. Preferably, carbon dioxide vapor is used as a means for propelling the feed material which may have a different phase of the same composition of the propulsive gas, or constitute an entirely different material. The apparatus is suitable for a number of applications such as neutralizing airborne ammonia vapor or droplets, extinguishing a flammable liquid, and conveying solid materials.

Abstract: A holder for Christmas trees which includes a container supported above ground level, legs to support the weight of the tree attached to the container, and holding members extending from the legs. The container is provided with sharpened points or a spike upon which the tree base rests, and can hold a reservoir of water. The legs are mounted to the container so that as the weight of the tree depresses the container, the legs spread on the floor and the holding members are forced to engage the tree trunk and hold it in place. Springs are provided at the point at which the legs are attached to the container so that the container may set above ground level at rest position with the holding members spread wide enough to accommodate various tree trunk sizes. Alternatively, a resilient stabilizing member integral with the legs and extending over the rim and into the container is provided which acts similarly to the springs of the first embodiment to hold the legs open prior to tree insertion.

Abstract: A holder for Christmas trees which includes a container supported above ground level, legs to support the weight of the tree attached to the container, and holding members extending from the legs. The container is provided with sharpened points or a spike upon which the tree base rests, and can hold a reservoir of water. The legs are mounted to the container so that as the weight of the tree depresses the container, the legs spread on the floor and the holding members are forced to engage the tree trunk and hold it in place. Springs are provided at the point at which the legs are attached to the container so that the container may set above ground level at rest position with the holding members spread wide enough to accommodate various tree trunck sizes.Alternatively, a resilient stabilizing member integral with the legs and extending over the rim and into the container is provided which acts similarly to the springs of the first embodiment to hold the legs open prior to tree insertion.

Abstract: A holder for Christmas trees which includes a container supported above ground level, legs to support the weight of the tree attached to the container, and holding members extending from the legs. The container is provided with a sharpened point or spike upon which the tree base rests, and can hold a reservoir of water. The legs are mounted to the container so that as the weight of the tree depresses the container, the legs spread on the floor and the holding members are forced to engage the tree trunk and hold it in place. Springs are provided at the point at which the legs are attached to the container so that the container may set above ground level at rest position with the holding members spread wide enough to accommodate various tree trunk sizes. Stabilizing pads are provided on the base of the legs at the contact with the floor surface.

Abstract: There is disclosed a flying saucer device which basically has a flat top surface including symmetrically disposed apertures. A bottom section consists of a central cone shaped portion having a top surface containing additional apertures in a predetermined alignment with the apertures in the flat surface. A bottom section surrounds the central cone section and contains apertures which are aligned with the apertures in the top section. The apertures in the top and bottom sections communicate one with the other and with the apertures in the central cone section by means of an annular cavity which is formed when the top section is emplaced with the bottom section. The top and bottom sections are emplaced with respect to a relatively central sloping wing section to afford lift to the device and which surrounds and extends beyond the top and bottom sections of the flying saucer device.