Abstract: A system for producing a laminated facsimile sheet assembly to cover and conceal a facsimile message on a message sheet comprises a supply of message sheet material which may be a roll of sheet material. A printing head is disposed to print a message on a section of the sheet material. A supply of cover sheet material is disposed to superimposed a cover sheet on the recorded sheet to the message sheet. The attachment means can be spots of pressure sensitive adhesive preapplied in a predetermined pattern to one side of the cover sheet. The over sheet can be part of a roll or one of a pile thereof; other sides of the cover sheets have slippery surfaces to prevent the cover sheets from sticking to each other in a pile. A cutter device can be disposed to cut the message sheets one at a time from the roll of message sheet material; or it can cut both the message sheets one at a time from the roll of message sheet material; or it can cut both the message sheet and superimposed cover sheet taken from a roll thereof.

Abstract: This laryngoscope has a cylindrical metal casing serving as a handle. An insulated, plastic blade is rotatably mounted near one end thereof on the casing between angularly spaced operating and nonoperating positions. A blade projects from the blade assembly to depress a patient's tongue. Batteries in the casing apply positive electric polarity to an electrode on the casing and negative electric polarity to the casing. A lensed end lamp having a bulb, base and end terminal is mounted on the blade assembly with the terminal in contact with a leaf spring which in turn contacts the electrode when the assembly is rotated to an operating position. A flange on the casing contacts the lamp base to complete a power supply circuit when the blade assembly is rotated to the operating position for lighting the lamp bulb. A light conductive rod extends from the lamp bulb to project light into the patient's larynix while the blade depresses the patient's tongue.

Abstract: A screen projection apparatus includes a housing within which a pair of projection screens are stored in a rolled position on motor driven rollers. A pair of access doors are mounted on the housing and support an idler roller over which a screen passes. The access doors open, one at a time, and the idler roller ensures that each of the screens when unrolled hangs in a common plane thereby eliminating the need to refocus the optical projection equipment which is used with the apparatus.

Abstract: A syringe for controlling the amount of material or medical fluid in a syringe body which is expelled therefrom upon depression of a plunger in the syringe body. The syringe includes a syringe body having a chamber and a discharge end portion and an open opposite end portion, with a plunger received in the syringe body. A measuring ring having an inner thread in mesh with an outer thread on the plunger, with latch means for setting and holding the measuring ring and plunger and thus, permit an exact volume to be expelled from said chamber.

Abstract: This automatic battery charging circuit has two independent channels for charging first and second batteries respectively. Circuit control means in the battery charging circuit enable it to provide charging current in proportion to the state of charge of the two batteries. First and second electronic bar displays are connected to the two channels by wires. The channels provide readings which indicate the state of charge of each battery. The state of charge of each battery is sensed only when no charging current flows to each battery. Computer components in the circuit control means compute the charge level of each battery and this charge level is indicated by the respective bar displays.

Abstract: This syringe for dispensing multiple doses of a liquid medicament one at a time has a cylindrical barrel for containing the medicament. At one end of the barrel is a single outlet opening. A plunger in the barrel discharges the medicament. A syringe cap rotatable mounted on the barrel has guide means restraining the cap against axial movement. Ratchet means on the cap and barrel permit only unidirectional rotation of the cap and sequentially retain the cap in equally spaced detent positions on the barrel. Nozzles on top of the cap have passages for ejecting the medicament. Each passage terminates in a hole in the top of the cap. Only one nozzle at a time communicates with the barrel vis the outlet opening in each detent position of the cap on the barrel.

Abstract: A pictorial element display assembly adapted for mounting in a matrix of similar assemblies to present a character by transmitted and/or reflected light. The assembly has a rectangular opaque panel formed with a pocket defining a window in which is set a colored plate for displaying the illuminated pixel. A pair of light spot projecting caps set in keyhole shaped slots in the colored plate have parallel, coplanar axes aligned on a central axis midway between lateral edges of the panel. A D-shaped gate is rotatable through 180.degree. by an electromagnetic device, to open and closed positions on the window and on the panel for selectively uncovering and covering the covered plate. The caps engage ends of light transmitting fiber cords which carry light from a light source to project the light as light spots in intense beams out of central holes in ends of the caps. The axis of rotation of the gate is parallel to and spaced laterally from the central axis of the colored plate, away from the colored plate.

Abstract: This invention concerns apparatus and a method for preparing an embryo for cryogenic storage, and for thawing thereof prior to implantation. The apparatus employs a washing tube containing a microporous filter dividing the tube into two chambers between opposite open ends. A tubular coupling member is attachable to either end of the tube. A liquid driving device which may be an aspirator, drives holding, washing, and storing liquid through the tube while the filter retains the embryo in a washing chamber. A storage straw can be attached to the coupling member to receive by aspiration the storing liquid containing the embryo. The straw contains a movable plug or wick at one end to force the storing liquid and embryo out of the storage straw into the washing chamber, after the storing liquid is thawed.

Abstract: Apparatus for projecting an elongated light bar representing an artificial horizon on an interior surface of an aircraft cockpit in front of a pilot of the aircraft with respect to a reference datum line on the interior surface of the cockpit. A vertical reference means, located in the cockpit or remotely therefrom maintains a vertical reference axis for all attitudes of the aircraft. A light beam source, which may be a laser beam, is aligned with a movable optical system having mirrors or lenses to convert the light beam to a plane of light. A mechanical linkage or a servomotor coupled between the vertical reference means and the optical system controls the optical system, so that the datum line appears stationary and the light bar seems to turn angularly and move vertically when the aircraft rolls and pitches.

Abstract: A transfer device for selectively combining and switching microwave signals between selective ports in a housing in which is a cylindrical rotor. In a lower portion of the rotor is a first passage having three arms each of which terminates at one of the ports when the rotor is one position so that microwave signals entering the passage via two of the arms are combined and leave the rotor and housing via the third arm. In an upper portion of the rotor are second and third passages which are blocked when the rotor is in the first position to prevent switching of signals therein When the rotor is in the second and third positions the second and third passages pass microwave signals between selected pairs of ports, while the arms of the first passage are blocked to prevent combining of signals therein.

Abstract: A slip lock connector assembly for joining end-to-end first and second flat-sided ducts made of sheet metal, has a framelike structure defined by a plurality of similar connecting members arranged in coplanar array. Each connecting member is made of pliable sheet metal bent, rolled, and molded to proper form. Each member has a flat main wall with first and second walls at opposite sides defining first and second channels. Both channels are filled with sealant material. The flat end of a side of the first duct in slipped into the first channel and secured by auxilary fastening elements, whereby the sealant in the first channel seals the connector to the flat end of the first duct. The flat end of a side of the second duct is slipped into the second channel and sealed by the sealant therein. In addition the wall of the second channel is formed with a rolled ledge which engages with lock projections on a side of the second duct to secure the second duct to the second channel.

Abstract: An electric plug combination lock for locking the prongs of an electric plug thereto. The lock includes a casing enclosing a chamber having a lock subassembly therein which has a frame lock portion with lock hooks that lock into holes in the prongs of the electric plug, a spring biasing the frame lock portion to the locked position and a combination lock for preventing the frame lock from entering the unlocked position unless the correct combination is present.