Abstract: A housing for a handheld vacuum cleaner includes a suction opening, a cyclone chamber, and a helical passage. The suction opening is defined in the housing. The cyclone chamber is in fluid communication with the suction opening. The helical passage includes a first end, a second end, and at least one sidewall. The first end is in fluid communication with the suction opening. The second end is in fluid communication with the cyclone chamber. The at least one sidewall extends between the first end and the second end. The at least one sidewall separates the helical passage from the cyclone chamber.

Abstract: A stiff key provides rigid coupling between a pair of shafts, such as a motor shaft and a rotary position sensor. The key may have a main body and a protrusion from the main body, such as from a middle portion of the main body. One of the protrusion or the main body may engage one part of one of the shafts being coupled together, and the other of the protrusion or the main body may engage a part of the other of the shafts. For example the protrusion may be in a keyway of one shaft and the main body may engage a recess or flat of the other shaft. The key and the coupling may be used in applications where space is at a premium, for example in a missile.

Abstract: A stiff key provides rigid coupling between a pair of shafts, such as a motor shaft and a rotary position sensor. The key may have a main body and a protrusion from the main body, such as from a middle portion of the main body. One of the protrusion or the main body may engage one part of one of the shafts being coupled together, and the other of the protrusion or the main body may engage a part of the other of the shafts. For example the protrusion may be in a keyway of one shaft and the main body may engage a recess or flat of the other shaft. The key and the coupling may be used in applications where space is at a premium, for example in a missile.

Abstract: A protective cover (10) for an instrument dome (12) extending from a body (20) of a vehicle, such as a missile. The cover (10) includes multiple segments (14 and 16) having trailing ends (18) connectable to the body (20) at joints (22) that allow for rotational movement. The cover (10) further includes a releasable holder (26) that includes a retention device (28) that holds leading ends (24) of the segments (14 and 16) together, and a release mechanism (30) for causing the retention device (28) to release the leading ends (24). The joints (22) hold the trailing ends (18) of the segments (14 and 16) to the body (20) through a predetermined range of motion beyond which the segments (14 and 16) will be released to separate from the body (20) when the segments (14 and 16) rotate beyond the predetermined range.

Abstract: A recirculating bearing allows two-axis translational motion of a supported member along a bearing surface. The recirculating bearing combines a bearing surface upon which a plurality of ball bearings are free to roll in any direction along the bearing surface with a recirculating volume that recirculates ball bearings to and from the bearing surface. Unless limited by the application, the recirculating bearing provides for unlimited range of motion of the supported member in both axes.

Abstract: A protective cover (10) for an instrument dome (12) extending from a body (20) of a vehicle, such as a missile. The cover (10) includes multiple segments (14 and 16) having trailing ends (18) connectable to the body (20) at joints (22) that allow for rotational movement. The cover (10) further includes a releasable holder (26) that includes a retention device (28) that holds leading ends (24) of the segments (14 and 16) together, and a release mechanism (30) for causing the retention device (28) to release the leading ends (24). The joints (22) hold the trailing ends (18) of the segments (14 and 16) to the body (20) through a predetermined range of motion beyond which the segments (14 and 16) will be released to separate from the body (20) when the segments (14 and 16) rotate beyond the predetermined range.

Abstract: A pointing device is provided for directing electromagnetic radiation along a line of sight within a flight vehicle. The pointing device includes a beam deviation structure; a rotation assembly configured to support the beam deviation structure such that the beam deviation structure is pivotable about the rotation axis; and a nod gimbal configured to support the rotation assembly and the beam deviation structure such that the rotation assembly and the beam deviation structure are pivotable about a nod axis.

Abstract: A seeker/receiver system for a moving body, such as for guiding the moving body to a target, includes an optics/receiver portion that tilts as a unit relative to other parts of the moving body. The optics/receiver portion includes a window which may be used to enclose and protect one or both of a pair of receivers or detectors, such as a laser energy detector or receiver, and an infrared energy detector or receiver. By moving the window and the receivers as a unit a set positional relationship is maintained between all of the elements of the optics/receiver portion. This simplifies the optics by obviating the need for all aspects of the window to present the same properties to energy detectors that tilt relative to it. The optics/receiver portion may be tilted using a tilt mechanism such as a gimbal.

Abstract: A pointing device is provided for directing electromagnetic radiation along a line of sight within a flight vehicle. The pointing device includes a beam deviation structure; a rotation assembly configured to support the beam deviation structure such that the beam deviation structure is pivotable about the rotation axis; and a nod gimbal configured to support the rotation assembly and the beam deviation structure such that the rotation assembly and the beam deviation structure are pivotable about a nod axis.

Abstract: A seeker/receiver system for a moving body, such as for guiding the moving body to a target, includes an optics/receiver portion that tilts as a unit relative to other parts of the moving body. The optics/receiver portion includes a window which may be used to enclose and protect one or both of a pair of receivers or detectors, such as a laser energy detector or receiver, and an infrared energy detector or receiver. By moving the window and the receivers as a unit a set positional relationship is maintained between all of the elements of the optics/receiver portion. This simplifies the optics by obviating the need for all aspects of the window to present the same properties to energy detectors that tilt relative to it. The optics/receiver portion may be tilted using a tilt mechanism such as a gimbal.