Abstract: A large diameter low pressure collapsible pin relief valve adapted to be connected with a vessel containing fluid under low working pressure is formed by a normally closed valve initially released to open by excess fluid pressure in the vessel applied through telescoping valve stems to a diaphragm opposite the valve for releasing a latch in the telescoping stems and collapsing the pin. Springs connected with the valve move it to full open position.

Abstract: An illuminated toothbrush is formed by a clear plastic body toothbrush having modified plastic filament bristle tufts in its head portion for admitting light into the bristles from a light source illuminated shaft inserted into a socket in the end of the toothbrush handle opposite the head.

Abstract: A frusto-conical thread protector on the pin end portion of a sucker rod is removed by a cylindrical housing axially surrounding, at one end portion, the thread protector and the adjacent end portion of the sucker rod. Stop means diametrically mounted on the periphery of the tubular housing at the sucker rod end portion projects inwardly of the housing wall in confronting relation to abut the large diameter open end of the thread protector for removing the thread protector from the sucker rod in response to a plunger axially projecting into the housing opposite the sucker rod and forcibly moved longitudinally to pierce the wall at the small end of the thread protector and axially abut the adjacent end of the sucker rod and separate the thread protector from the sucker rod.

Abstract: An apparatus for unlocking the door to a hygienic area is formed by a circuit having a pair of series connected, normally open push button switches disposed in spaced apart relation at lateral limits of a lavatory. When the switch buttons are simultaneously depressed for a predetermined time, as by the little finger of each hand of a worker, soap sprays from overhead spray heads on the worker's hands, and after the predetermined time delay, unlocks the door.

Abstract: Fluid pressure above a predetermined limit in a fluid pressure system is reduced by operating a relief valve, having its inlet port connected with the system, in a throttling action. A normally seated valve member is maintained in relief valve closed position by pneumatic pressure on a piston in a chamber of the relief valve. A fluid pressure sensor communicating with the inlet port generates a signal in response to fluid pressure above a predetermined limit received by a sensor signal processor energized by a source of electrical energy which releases pneumatic pressure in the chamber for a predetermined time interval allowing system fluid pressure to unseat the valve member and exhaust fluid pressure through the relief valve outlet port.

Abstract: A crowd control barrier is formed by a plurality of congruent rectangular fence panels joined end to end by pins in a plurality of sleeves secured to panel end posts in axi-ally aligned vertically staggered relation. A knee brace secured to adjacent panel end posts by cooperating knee brace sleeves stabilizes the barrier in cooperation with a base platform hingedly connected longitudinally with each fence panel opposite the knee brace on which pedestrians stand when adjacent the fence panels.

Abstract: A trigger safety device for a firearm having a trigger pivotal within a trigger guard on the firearm is formed by an integral end, side wall and bight portion body forming a socket substantially enveloping the trigger guard and including J-shaped hook means engaging the trigger guard and supported by the side walls with an axial compression spring biasing the hook means into engagement with the trigger guard.

Abstract: A liquid spaying apparatus is formed by a molded plastic generally rectangular container having a forward surface contoured for contacting the back of a user in backpack fashion. A wheel and axle assembly secured to the forward lower portion of a container support panel in cooperation with a handle on the container permits movement of the apparatus in two wheel dolly fashion. An on board battery drives a motor/pump assembly for spraying liquid through a manually controlled wand.

Abstract: A selectable height computer monitor stand is formed by one or a plurality of rectangular rigid spacers underlying a top secured to at least one of the spacers by bolts extending through lateral edges of the top and respective end portions of a clamp plate laterally projecting through one of the spacers. The stand height is increased or decreased by inserting or removing additional spacers under the primary monitor stand.

Abstract: A fluid pressure relief valve of the excess pressure collapsible pin relief valve type which monitors fluid pressure in a system and automatically recloses after opening and discharging an initial volume of high pressure fluid. The relief valve includes a valve body connected with a fluid system being monitored with a valve head closing an inlet port and having a valve stem projecting axially beyond the valve head through the valve body and maintained closed by a pin cage having a collapsible pin axially abutting the outward end of the valve stem. A cylinder surrounds the valve stem between the valve body and the pin cage with a piston connected with the valve stem at the cylinder end opposite the valve head. A proximity switch responsive to outward movement of the valve stem upon collapse of the pin energizes a circuit opening a valve connecting a source of pressurized gas with the piston end of the cylinder to force the valve head toward end of the seat and close the relief valve.

Abstract: An excessive fluid pressure safety valve for a fluid processing heat exchanger transferring thermal energy to fluids in the heat exchanger by piping extending through the heat exchanger is formed by a valve, normally maintained open by a pressure responsive collapsible pin, interposed in the thermal energy conductor upstream from the heat exchanger. Fluid pressure above a predetermined value in a tube connecting the heat exchanger with the valve axially moves a piston in the valve toward and collapses the pin to close the valve.

Abstract: A toxic and corrosive fluid monitoring relief valve is formed by a valve body containing inline fluid pressure relief valves respectively opened in response to a first and a second fluid pressure. Fluid pressure in excess of the first fluid pressure opens the first valve by rupturing a pin normally maintaining the first valve closed to allow fluid contained by the valve body, to act on the second downstream relief valve. The second downstream valve being spring-loaded to open at the second predetermined fluid pressure and exhaust fluid pressure in a blow down action and reclose the valve when the excess fluid pressure has been reduced.

Abstract: An intravenous catheter shield is formed by a base having side walls underlying a portion of a hand and forearm of a patient having an inserted infusion needle. The side walls at one side of the base define a thumb nesting recess therebetween. Resilient padding is interposed between the base and the patient's hand and forearm and straps extending transversely across the patient's hand releaseably secure it to the base. An inverted transparent generally U-shaped shield has leg portions removably secured to the base side walls with the bight portion of the shield in vertically spaced relation, with respect to the patient's hand, permitting visual inspection of a venipuncture site at all times.

Abstract: Wire drawing apparatus for ease in manually drawing precious metal wire is formed by an elongated base having a forward end portion transversely supporting a draw plate through which wire stock may be drawn and a downturned rearward end portion having a pivotally connected upstanding lever moveable at its upper end portion toward and away from the draw plate by pivoting about a horizontal axis. A wire grip for grasping wire dawn trough the draw plate is attached to the lever by a link chain extending through a keyhole slot in the depending end portion of the lever for edgewise nesting one link of the chain prior to manually moving the lever in a direction opposite the draw plate.

Abstract: An air hose reel is formed by an upright L-shaped support horizontally journaling an axle having reel forming spokes secured to one end portion for angular rotation in a vertical plane. A tension spring and friction washers surround the axle for retarding free wheeling movement of the reel. Couplings at respective ends of the axle are connected with air hose.

Abstract: An environmentally safe apparatus for reclaiming uncondensed hydrocarbons normally exhausted to the atmosphere from the still column of a glycol dehydrator system, and utilizing the uncondensed hydrocarbons as fuel in the burner of a reboiler fire-tube by natural draft of the fire-tube exhaust stack.

Abstract: .?.In a nurse administered medication dispensing system a mobile cart contains a plurality of doctor prescribed medication in accordance with a like plurality of patients scheduled to receive such medication. The medication containers stored in the cart is accessible by the nurse only in response to a patient ID code entered by the nurse into the keyboard of a cart supported microprocessor including a software program responding to the input code energizing mechanical components which obtains the medication from an onboard supply and transfers it to a specified nurse accessible cubicle or which releases secured medication dispensing units on or in the cart and records the time, date and quantity of medication dispensed..!..Iadd.A fully automatic apparatus for dispensing medications in tablet or capsule form for a patient is disclosed.