A window mounted support platform for an electrical generator. The support platform is securable to a window frame and provides a movable platform that can be orientated on the interior side of the window frame for ease of accessing a generator secured to the platform. The movable platform can further be moved to a position external the window frame where the generator can operate without introducing fumes inside the window frame. The generator is secured to the top of the platform. The support platform employs a runner extending from a bracket configured for placement on the inside of a window frame, allowing movement of the shelf platform from an internal orientation to an external orientation. Doors are used to isolate the generator from the interior living space. An electrical cord can be routed through a sealing mechanism in the doors.

A window mounted support platform for an electrical generator. The support platform is securable to a window frame and provides a movable platform that can be orientated on the interior side of the window frame for ease of accessing a generator secured to the platform. The movable platform can further be moved to a position external the window frame where the generator can operate without introducing fumes inside the window frame. The generator is secured to the top of the platform. The support platform employs a runner extending from a bracket configured for placement on the inside of a window frame, allowing movement of the shelf platform from an internal orientation to an external orientation. Doors are used to isolate the generator from the interior living space. An electrical cord can be routed through a sealing mechanism in the doors.

A method and apparatus are provided for implementing an ultra-high stability stage with combined degrees of freedom for multiple axes of motion. The ultra-high stability stage includes a base, a driving wedge supported by the base and a following wedge supported by the driving wedge. The base and each wedge are formed of a selected stable material having predefined rigidity and low thermal expansion coefficient. Integrated air bearings, respective driving mechanics associated with each of the wedges and guiding components having selected degrees of freedom enable movement about multiple axes of motion, such as X, Y, Z translation axes, and rotation X and rotation Y axes. Another ultra-high stability stage with combined degrees of freedom for multiple axes of motion includes an intermediate wedge between the driving wedge and the following wedge to enable additional movement about a rotation X axis.

A kit may include at least one frame lifting mechanism configured to be mounted within the support frame. The lifting mechanism may include a movable element configured to be movably mounted to the frame and an extendible member configured to extend between the movable element and a static member mounted on the frame. The movable element includes at least one support portion extending from a lower surface of the movable element when the movable element is mounted to the frame. The extendible member is configured to be movable between a compressed state and an extended state. The movable element is configured to be mounted to the frame such that on extension of the extendible member the movable element is pushed downwards and the at least one support portion moves below a base of the frame and provides a lifting force to the frame.

An adjustable levelling pad includes a first component provided with first screw threads, a second component provided with second screw threads cooperating with the first screw threads of the first component and a bearing element having a bearing surface cooperating with the first component. The second component has an upper surface having an inclined surface portion, the inclined surface portion being inclined in the radial outward direction at an angle relative to an axis perpendicular to the axis of elevation of the adjustable pad.

An adjustable levelling pad includes a first component having first screw threads, a second component having second screw threads cooperating with the first screw threads of the first component, a bearing element having a bearing surface cooperating with the first component and a protection cap fastened to the first component and extending towards the second component. The protection cap at least partially surrounds the second component and is configured to cooperate in a sealing manner with the second component.

An adjustable levelling pad includes a first component having first screw threads, a second component having second screw threads cooperating with the first screw threads of the first component, a bearing element having a bearing surface cooperating with the first component and a protection cap fastened to the first component and extending towards the second component. The protection cap at least partially surrounds the second component and is configured to cooperate in a sealing manner with the second component.

An adjustable levelling pad includes a first component having first screw threads, a second component having second screw threads cooperating with the first screw threads of the first component, a bearing element having a bearing surface cooperating with the first component, and a shear plate mounted in the second component below the first component, the shear plate having an inner diameter less than or equal to an inner diameter of the first component and being configured to provide support for the first component.

An adjustable levelling pad includes a first component having first screw threads, a second component having second screw threads cooperating with the first screw threads of the first component, a bearing element having a bearing surface cooperating with the first component, and a shear plate mounted in the second component below the first component, the shear plate having an inner diameter less than or equal to an inner diameter of the first component and being configured to provide support for the first component.

An adjustable levelling pad includes a first component provided with first screw threads, a second component provided with second screw threads cooperating with the first screw threads of the first component and a third component having a bearing surface cooperating with the first component. The thread entrance angle of the second screw threads of the second component is less than 35°.