Abstract: An Aqua-Blok that fits into a frame or cone of a manhole directly beneath the cover, in the frame below the cover or within the cone to catch water that seeps into the manhole. Aqua-Blok is a polyurea, flexible bowl that rests on the frame directly under the cover or is mounted in frame or the cone. When used in the lower frame, it has a closed cell gasket on its outer top side, and an adjustable stainless steel ring on its inner circumference to press it against the frame. When Aqua-Blok is placed in the cone, it uses a rubber mount placed within the cone to mount Aqua-Blok. The rubber mount has a core with concentric rubber rings on its outer periphery that match the sloped sides of the cone. It has a circular cavity in its inner circumference to receive the pressure ring. The pressure ring forces the core and the concentric rings against the wall of the cone in a watertight fit. The bowl is seated on the mount where it catches any water that flows into the manhole from above it.

Abstract: A watertight waste water access fitting that is placed below ground level to mate with a pipe from a waste water source and a pipe from a sewer system and with access to its inside from ground level. The fitting is a preformed, polyethylene, one piece hollow body with three formed extensions from the body. Two of the extensions are formed at the bottom sides of the fitting, and one is formed at the top. The bottom side extensions mate with water pipes, and the top extension can be opened to expose the inside of the fitting for maintenance. The bottom extensions are formed of connected segments of decreasing outer diameter with a cutting guide on each segment. The segments can be cut to mate with various diameters of pipe. The top segment has a cap and cutting guide where the cap can be removed by cutting the segment at the cutting guide.

Abstract: A safety lock device for a toggle switch has a cylindrical head with slotted opening in its perimeter, a threaded outer surface, flared skirt and an open base. Vice arms are attached within the device with its arms protruding through its slotted perimeter. The vice arms have opposed, grooved heads spaced within the open base. A lock ring with teeth on its inner surface and a plurality of screw holes through its upper surface, slides over the cylindrical head with the teeth in the slotted outer perimeter of the cylindrical head. The lock ring forces the grooved heads into a clamping position of the toggle switch. A flanged lock nut with a hole in its flange is threaded to mate with the cylindrical head and lock ring. The hole in the flange is aligned with one of the screw holes of the lock ring and a screw is inserted into the aligned holes to lock the device in locking position.

Abstract: A camera shutter in which opening and closing shutter blades are sequentially movable between terminal light unblocking and blocking positions of an exposure aperture respectively. Each blade defines a notch located to be movable relative to a pin positioned within the path of movement of the notch to engage the notch and arrest the motion of the blade at its respective terminal position.

Abstract: Camera diaphragm control apparatus in which slidable diaphragm blades are adjustable by a differential motor to establish and continually maintain an exposure aperture of size related to ambient scene brightness. A linkage, responsive to mounting a flash unit on the camera, connects the differential motor to a focus control member. Through the linkage, the focus control can override the adjustment of the diaphragm by the differential motor, and permit diaphragm adjustment with both ambient light and focus of the camera with distance to the photographic object.