The micropolarizing equipment of the present invention consists in a pair of capillary tubes of black glass or glass with a black outer coating which fit into sockets in three prisms, the first being a 45.degree. prism over the central aperture of the microscope stage which reflects the plane polarized beam at right angles through one of the capillary tubes; a second prism, which is double, reflects light emerging from the first capillary tube at right angles up to a second 45.degree. prism into...

A siphon arrangement for removing sludge from the bottom of a sewage settling tank and discharging it into a sludge tank from which it is removed. The inlet of the siphon is submerged in the sewage adjacent the bottom of the settling tank and its outlet is submerged in the sludge discharged into the sludge tank. The siphon is carried by a float supported by the liquid in the settling tank, the level of which may vary as more or less sewage to be treated flows into the tank. The level of the slud...

Structure having an inner core comprising a high-strength zirconium alloy, a layer of a gas diffusion-impeding material on the surface of the core and a highly corrosion-resistant zirconium alloy layer engirdling the core and in intimate contact with the gas diffusion-impeding layer.

Photometer enabling simultaneous observation of an object being investigated and of a measuring diaphragm, provided with visual and measuring systems, wherein one or two polarizing been splitters divide the main light beam entering into the instrument into two beams which are linearly polarized. The image of the measuring diaphragm is projected on the background of the image of the object being investigated by means of special plates which turn the direction of the light vibrations and change th...

Apparatus for aiming a tool used to perform a mechanical operation on a semiconductor device, including a light pencil which directs a thin beam of light in the area where the tool is to be aimed. The position of the light beam indicates one of the positions of the moveable tool.

A portable tape dispenser for dispensing dry wall tape comprises a hopper for containing a supply of dry wall joint cement in fluid form and means serving to support the hopper from the waist of a workman in a manner freeing both of his hands. A roll of dry wall joint tape is carried and supported for rotation from the hopper whereby guide means lead the tape from its roll into and out of the supply of joint cement. A dispensing slot is formed between a stationary knife edge member and a movable...

The invention is concerned with an emergency system for safely landing disabled aircraft without serious damage to the aircraft or to the occupants thereof. The system preferably includes a parachute connected to the aircraft by a flexible cable and normally housed in a turret from which it may be quickly ejected and deployed in times of emergency to preliminarily reduce both the forward motion and the rate of descent of the aircraft. The system also includes an inflatable envelope or balloon wh...

A leg and foot rest device to alleviate leg and foot fatigue, which device is readily insertable between the mattress and its support of a bed, to project from lateral sides thereof and also acts not only as a leg and foot rest, but also to preclude both the bed covers and occupant from inadvertently inadvertently off the bed, as contrasted to means elevating bed covers at the lower end of the bed to preclude contact thereof with the occupants legs and feet.

A remote position indicator for a movable member located in an inflammable atmosphere which comprises a variable resistor mechanically connected for adjustment by the movable member, an intrinsically safe power supply arranged to pass current through the variable resistor, an amplifier comprised entirely by one or more transistors and one or more resistors connected to receive the voltage signal delivered by the variable resistor, and a meter connected to receive the amplified signal delivered b...

Means are provided to remove an assembly comprising a frame, a chip and a substrate from the support on which they are assembled. That means comprises moveable fingers which are rotated out of frame contacting position by power means such as compressed air and which are rotated into the frame contacting position by springs.