Abstract: This invention relates to a self adhering patch which is positioned upon the needle of a syringe. When the skin of the patient is pierced with the hypodermic needle the patch comes into contact with the skin, self adhering to the skin. As the needle is withdrawn from the patient, the patch remains upon the skin of the patient and serves as a seal against the expulsion of blood or other body fluids from the injection site.

Abstract: A syringe which carries a hypodermic needle for administering an injection to a patient. The syringe also includes a body and a plunger with the plunger including a spring-loaded retractor which draws the needle into the plunger immediately after the injection is administered.

Abstract: A gas monitor for detecting the presence of absence of a noble gas in the space between two window glazing panels. The monitor is preferably non-reactive with the noble gas, but reactive in a visible way with ambient air. When the noble gas leaks out of the space between the glazing panels and ambient air infiltrates, the monitor provides a visual indicator of the occurrence.

Abstract: A window security device which operates on differential gas pressure theory to trigger an alarm upon pressure equalization. A plug which completes the electric activator circuit includes biasing springs or similar devices to urge the plug out of contact with the activator circuit to trigger the alarm upon disturbance or breakage of one of the window glazing panels.

Abstract: A window security device adapted for use in a vacuum environment. The device includes a conductive seal in electrical communication with an alarm. When the vacuum is disturbed the seal falls out of contact with the alarm circuit, activating the alarm.

Abstract: This invention relates to a fluid closure for preventing gaseous and particulate material from flowing through an opening in a fluid confining structure, and more particularly relates to a fluid curtain for sealing a lance port in a gas collecting hood for an oxygen steelmaking furnace.

Abstract: Oil pressure delay check valve and pressure switch for unattended Diesel engine to shut off the fuel supply valve after a low oil pressure signal, and to delay opening of the valve for a predetermined time interval. This delay is attained by the closing of a normally open pressure switch upon pressures decreasing from the order of 8 psi and by bleeding the oil pressure past a check valve through a bleeder tube in cooperation with an accumulator, from a pressure in the order of 8 psi to a pressure in the order of 5 psi to accommodate the opening of a normally closed switch as the pressure decrease from the order of 5 psi. The two switches are in series and when closed, energize the solenoid of an electrically energizable valve to shut off the supply of fuel to the Diesel engine. As the oil pressure decreases, one pressure switch will close and remain closed while the other pressure switch will open in a predetermined time delay interval and effect opening of the fuel supply valve.

Abstract: A cooling system for cooling steel slabs or the like comprises an elongated tank with parallel rollers for conveying the heated slab horizontally beneath the surface of a water bath. Water curtains from angularly directed upper and lower nozzles seal the entry opening in the end of the tank through which the slab is introduced into the tank and also supply cooling water to the tank. The rollers have axially spaced disk portions for supporting the slab in spaced relation above guide plates or aprons extending between the rollers. Inlet cooling water from the lower water curtain impinges against the lower surface of the slab and is diverted into and flows at high velocity through the restricted cooling channel defined between the guide plates or aprons and the underside of the slab. In a continuous form of the cooling system, a water curtain sealed outlet opening for the slabs is also provided in the opposite end of the tank. Intermediate cooling water nozzles may also be provided between the ends of the tank.