Abstract: Main and auxiliary fuel injectors are installed at an intake passageway connectable to the cylinders of the engine. Only the main fuel injector is operated to inject fuel therefrom during a relatively low load engine operation, and both the main and auxiliary fuel injectors are operated to inject fuel therefrom during a relatively high load engine operation.

Abstract: A 2-cycle engine having a transfer passage communicating the crank room with the combustion chamber. An accumulation tank having a volume which is larger than the stroke volume of the piston is arranged in the transfer passage. A reed valve is arranged in the transfer passage between the crank room and the accumulation tank.

Abstract: An idling speed control system for automotive vehicle engines is disclosed. A throttle valve bypass passage for intake air is provided with an air control valve of the on-off type. The air control valve is electrically energized by a pulse train of substantially constant pulse repetition rate and pulse duration modulation so that the duty cycle of the valve is varied according to deviation of the engine idling speed from a set point value. The pulse repetition rate of the energizing pulses is higher than the frequency at which the engine can respond to air supply pulsations in the intake manifold.

Abstract: To match the control adjustment speed of an internal combustion engine control system to operating speed thereof, a control loop is provided which includes an operating parameter sensor, a correlator comparing a sensed signal with an oscillating command signal, a controller responsive to a consequent error signal and which then controls operation of the engine; a speed transducer provides speed-dependent output signals which control (a) the frequency of oscillation of the oscillator and (b) the operating speed of the controller. If the controller is an integrating-type controller, then the time constant of the integrator thereof is changed, for example by varying a resistance value of an R/C circuit as a function of engine speed.

Abstract: An ignition timing control device for a turbo-charged internal combustion engine which retards or advances the ignition timing in accordance with the load condition on the engine. The control device acts on a timing adjustment mechanism attached to the distributor to control the ignition timing as a function of the intake manifold pressure. The control device has a housing and a yieldable wall, such as a diaphragm, in the housing forming a pressure chamber on one side thereof. A pressure line is connected to the pressure chamber and opens into the intake manifold at a point swept by the throttle. The manifold pressure, which at that point varies with changes in engine load, is transmitted through the line to the pressure chamber to act on the diaphragm. The diaphragm is coupled to the ignition timing adjustment mechanism so that the timing is advanced or retarded in response to the displacement of the diaphragm.

Abstract: In an exhaust gas recirculation system for an internal combustion engine, a flow control valve is disposed within a recirculation pipe and operatively connected to a pneumatically operated servomotor to control the flow quantity of exhaust gases through the recirculation pipe, and an orifice is disposed within the recirculation pipe upstream of the valve to form a space between the valve and the orifice. A pressure regulator serves to modulate negative pressure from an engine intake manifold to the servomotor on a basis of pneumatic pressure applied thereto and pressure in the space. The pneumatic pressure applied to the pressure regulator is electrically controlled to satisfy the following equation.Pd=f(Pv, N)where the character Pd is the pneumatic pressure applied to the pressure regulator, and the characters Pv and N respectively indicate the negative pressure in the intake manifold and the engine speed.

Abstract: An exhaust gas recirculation system for an internal combustion engine employs a recirculation control valve in a passageway connecting the engine exhaust passage to the engine intake passage downstream from the throttle valve. An air conduit having an air control valve therein furnishes atmospheric air to the intake passage downstream from the throttle valve. Vacuum responsive actuators are provided for each of the control valves and they are operated by vacuum pressure regulated by a regulating valve, which regulating valve is responsive to differential pressure between vacuum intensity in the intake passage upstream from said throttle valve and modified atmospheric pressure. The modified atmospheric pressure is obtained downstream of a restriction in the air conduit.

Abstract: A self-regulating electrically heated positive-temperature-coefficient (hereinafter PTC) carburetor stove for use in the fuel entry system of a gasoline engine is connected through the ignition system directly to the battery for rapidly heating of the stove upon starting of the car. This system comprises a plurality of PTC pills housed in a container with a high thermal conductivity top plate in direct heat transfer relation with the pills. Gasoline droplets are evaporated on this plate during cold start conditions to minimize the need to run a cold engine in the closed choke gasoline rich mode. During heat-up of the engine the PTC pills reach the anomaly temperature and at that point greatly increase their resistance thereby virtually terminating the power requirement of the stove in the heated engine mode.

Abstract: An induction system for a multi-cylinder internal combustion engine that improves fuel efficiency and reduces the emission of unwanted exhaust gas constituents, particularly at the low and medium load conditions. The engine induction system comprises a plurality of separate carburetor barrels which, at least under some running conditions, serve cylinders separately from each other through main induction passages. One carburetor barrel is provided with a different fuel discharge system than the other carburetor barrels for accomodating a certain engine operating condition. A separate sub-intake system connects this carburetor barrel with other cylinders not normally served by the particular carburetor barrel in question. This sub-intake system has a substantially smaller cross-sectional area in the main intake system so that the charge drawn into the cylinders through the sub-intake system enters at a substantially higher velocity.

Abstract: An induction system for a multi-cylinder internal combustion engine that improves fuel efficiency and reduces the emission of unwanted exhaust gas constituents, particularly at the low and medium load conditions. The engine induction system comprises a plurality of separate carburetor barrels which, at least under some running conditions, serve cylinders separately from each other through main induction passages. One carburetor barrel is provided with a different fuel discharge system than the other carburetor barrels for accomodating a certain engine operating condition. A separate sub-intake system connects this carburetor barrel with other cylinders not normally served by the particular carburetor barrel in question. This sub-intake system has a substantially smaller cross-sectional area in the main intake system so that the charge drawn into the cylinders through the sub-intake system enters at a substantially higher velocity.

Abstract: A fuel injection system for an internal combustion engine includes an air suction pipe, a throttle valve located in the pipe, and a member, upstream of the throttle valve, which is actuatable by air flowing through the suction pipe so as to move a piston valve to dose a quantity of fuel to a fuel injection nozzle. The system includes a duct which bypasses the throttle valve, the duct having a valve which closes the duct when the throttle valve is closed and when the engine is above the idling speed. Dosing of fuel is thereby stopped during coasting of a vehicle, leading to decreased fuel consumption.

Abstract: A fuel injection system is proposed which serves for the improved conditioning of the fuel-air mixture fed to a mixture-compressing, spark-ignited internal combustion engine. The fuel injection system comprises preferably an injection valve at the air intake pipe wherein a conditioning member, pivotable by the amount of air introduced in opposition to a resetting force, is arranged downstream of an arbitrarily operable throttle element, this pivoting action being arranged to cause a pressure drop at the conditioning member. The fuel injection takes place through an injection valve disposed in an air bypass beyond the throttle element and the conditioning member. Due to the pressure drop produced by the conditioning member, it is ensured that, in all positions of the throttle element, a constant air stream is maintained via the air bypass, which serves for conditioning the injected fuel.

Abstract: An injection pump with a full-load stop, preferably electronically controlled, which is adjustable against the force of a prestressed spring as a result of the control exerted by an electromagnet with a controllable stroke and which, when there is no current in the magnet, is displaceable by means of the spring into its terminal position which determines a reduced full-load quantity. Thus the maximum injection quantity is reduced in accordance with operating conditions and with the operational status of the engine; by this means, environmentally safer and smoother engine operation is possible at all operating conditions. The injection pump is also capable of continuing to function if the electrical or electronic parts fail.

Abstract: A dual spark plug ignition engine with an EGR system is provided with an ignition system which is arranged to achieve single spark plug ignition by sensing a considerably low intake vacuum which represents high power output engine operating range. The engine is further provided with an engine starting sensing switch to cause the ignition system to carry out dual spark plug ignition during engine starting although the intake vacuum is considerably low as at the high power output engine operating range.

Abstract: A rotary internal combustion engine fitted with ignition means for the fuel air mixture delivered to the cylinders comprising a rotor having an output rotor shaft, a housing forming the outer shell of the engine which is fitted with intake and exhaust openings for fuel and exhaust gases, the openings located in the outer periphery of the housing wherein the rotor housing comprises a rotatable support for the motor shaft and includes an irregularly shaped cavity which surrounds the periphery of the rotor. A plurality of radially disposed vanes are mounted in the rotor for radial reciprocating movement relative to the axis of rotation of the rotor. Novel interconnecting cam means are provided between the outer shell of the housing and the vanes to initially actuate the vanes radially outwardly upon rotation of the rotor to positively position and maintain the outer ends of the vanes in close operative proximity to the inner peripheral surface of the irregularly shaped cavity.

Abstract: An ignition system for spark-ignited internal combustion engines that measures the octane requirement of individual cylinders and optimizes the spark advance timing of the individual cylinders.

Abstract: A method of detecting knocking intensity of an internal combustion engine uses a detector for detecting vibration propagated within the engine and a first calculation circuit for obtaining an average value of vibration sensed by the vibration detector within a predetermined crank angle before the top dead center, and in which knocking is identified when the ratio between the above average value and the maximum value of vibration after the top dead center exceeds a predetermined value.

Abstract: Detonation (knock) control apparatus for an internal combustion engine, such as an outboard motor, comprises a transducer for sensing detonation and for providing a signal when detonation occurs to an electronic controller which then operates an electrically controllable valve to enrich the fuel/air mixture to the engine to thereby reduce detonation. The electronic controller is fail-safe and is responsive to loss of signal from the sensing device and to electrical power supply failure to operate the valve to enrich the mixture.

Abstract: A compact air-fuel mixture routing box mounted on an internal combustion engine is divided into first and second chambers by an internal diagonally positioned opening free fixed baffle. An air-fuel mixture from a carburetor mounted on top of the routing box passes downwardly through a top panel of the box and into the first chamber, along one side of the baffle, and outwardly through one side wall of the routing box to an inlet of a supercharger. The pressurized mixture from the supercharger enters the second chamber through another side wall of the box, passes downwardly along the opposite side of the baffle, and out through a bottom panel of the routing box to the intake manifold of an engine. A spring biased pressure relief valve limits the pressure of the air-fuel mixture fed to the engine.

Abstract: A dust shroud is disclosed for a pipe-cutting portable circular saw. The shroud comprises upper and lower blade housings which are nested and guided so that the lower housing can be moved into and out of the upper housing. The lower periphery of the lower housing generally conforms to the shape of the pipe to be cut. A device which cooperates with the saw and which fits into the pipe to collect dust from within the pipe is also described.

Abstract: Apparatus for separating joined-bricks includes a transport means for moving the joined-bricks and a separating means disposed along the transport means for separating the joined-bricks into two parts, the separating means including a pressure bar engageable with the joined-bricks and actuating means operatively connected to the pressure bar to effect actuation of the latter, the actuating means providing for synchronous movement of the pressure bar with the engaged joined-brick during the separation, whereby the joined-bricks are movable without interruption along the transport means during the separation.

Abstract: A food warming stove suitable for placement upon a serving or dining table, and including a shell mounted upon a revolving turn table, the shell enclosing several braziers each of which holds a quantity of sterno canned heat burning compound for producing flames under hot plates adaptable for placement of cooking vessels thereupon, so to warm various foods.

Abstract: An improved combustion chamber comprises a shell having a circular array of integral teeth formed at one end thereof. Shrunkfit onto said shell end at or near the roots of the teeth is a ring. The toothed end of the shell is received in an opening in a sheet header so that the ring engages against the header sheet and a continuous weld bead is formed between the ring and the header sheet all around the shell. The shell teeth are bent radially outward and engage the header sheet on the opposite side thereof from the ring so as to be in intimate thermal heat exchange contact with the sheet and these teeth are also welded to the header sheet. The aforesaid engagement between the chamber and rear head minimizes stresses on hot end of the chamber and prolong its useful life. Means engaged around the opposite end of the shell supports, and yet permits lengthwise movement of, that end of the shell.

Abstract: An ash-free ventilating apparatus for use in a fireplace is disclosed comprising a grate element adapted to detachably secure to the opposing end walls of a fireplace and extend therebetween, a ventilator housing centrally located within the fireplace and below the grate element and having an inlet port for connection to a source of fresh air and outlet ports in fluid communication with the inlet port, and a valve operationally connected to the outlet ports to regulate the flow of fresh air through the outlet ports. The ventilator housing has two elongated side walls with each side wall sloping downwardly and outwardly toward the immediately adjacent fireplace end wall to guide the fallen ash matter to an ash pit. An additional deflecting wall is disposed adjacent each end wall of the fireplace and opposite to the elongated side walls of the ventilator housing to also deflect fallen ash matter to the ash pit.

Abstract: A vitreous ceramic cooker hob plate with circumferentially surrounding frame permanently elastically adhesively fitted thereto is provided. The circumferentially surrounding frame is adhesively joined to the hob plate in such a way that a narrow gap is left between the bevelled edge of the frame and the hob plate, and the frame flange overlaps the same. The gap is filled in, flush with the frontal side of the bevelled edge, by a permanently elastic adhesive which makes a sealed and mechanically firm joint between the bevelled edge and the hob plate.

Abstract: A catalytic heating means is disposed in a heating chamber of a tubular body member defining a hair winding portion. The curling device includes a supply of a liquid fuel and aspirating means for vaporizing the fuel and mixing the vaporized fuel with air to supply a vaporized fuel/air mixture to the catalytic heating means. A self-contained ignition means proximate the catalytic heating means is provided for initiating the oxidation of the vaporized fuel/air mixture in the presence of the catalyst. The catalytic heating means includes a woven sleeve with an unravelled end to act as a flame arrestor and increase ignition efficiency.

Abstract: A solar energy concentrator comprises an elongated, linear collector for receiving concentrated solar energy, mounted to extend longitudinally in an East-West direction and spaced above a supporting surface. An array of separate, elongated solar energy reflectors are provided for reflecting received solar energy upwardly and focusing the same along the collector. The reflectors are mounted in parallel, elongated rows, parallel of the collector and at a level below the same. The reflectors are aligned coaxially in end to end relation in rows and are formed into modular columns transverse or normal to the collector. Each reflector is mounted in a support for individual pivotal movement about a longitudinal axis parallel of the collector and a novel drive system is provided for interconnecting the supports and pivoting the same in unison to substantially continuously reflect the received solar energy in a focused manner on the collector as the angle of elevation of the sun's rays is changed during the day.

Abstract: A parabolic cylindrical trough solar concentrator shell is disclosed having a pair of oppositely disposed end support members jointed by spanning structural support members which may be in the form of individual elongated generally triangular polygon members to form the parabolic cylindrical trough. The inwardly directed surface of each polygon member is concave in shape and rendered highly reflective and so disposed such that the composite produces a highly reflective, concave, generally parabolic surface which reflects and focusses radiant energy striking upon it along a line parallel to and above the surface of the trough. A radiant energy receiving and absorbing conduit which carries a fluid heat transfer medium is provided along the focal line. The conduit is structurally supported from the end support members in a manner which allows free rotation of the structure relative to the support.

Abstract: A solar panel has a series of channels through which water or other fluids may flow for exposure to and heating by solar radiation. Common to all the channels are inlet and outlet manifolds through which, respectively, the water is directed into and discharged from the channels. Construction of the panel is simplified and is rendered economical by fashioning of the same from a pair of superposed, inexpensive metal sheets, as for example roofing tin. The sheets are readily preformed with the manifolds and channels, in such fashion that when the sheets are connected along their peripheries by means of mechanical expedients well known in the sheet metal art, the several channels are automatically defined between the sheets, and are further automatically brought into communication with the inlet and outlet manifolds.

Abstract: The panel for converting solar energy to sensible heat of a working fluid comprises a thermally-insulated and impervious base member overlayed with and spaced from a solar-collecting member or collector. The collector is in turn overlayed with and spaced from a pair of mutually spaced impervious films which are essentially transparent to incident solar radiation and substantially opaque to radiation emitted by the collector. The solar-collecting member consists of a thermally-insulating porous matrix substance and of a second substance affixed thereto. The second substance is in divided and substantially discrete form. The second substance exhibits a high degree of absorptivity for solar radiation and low emissivity for long wave radiation. The working fluid to be heated is admitted to a chamber underneath the solar-collecting member. The working fluid has a pressure sufficient to cause it to percolate through the collector.

Abstract: The invention relates to a solar pick-up comprising a panel and means associated with this panel, suitable for absorbing the solar radiation and for heating a fluid, wherein said means are constituted by a thin metal foil which covers virtually all the panel and which presents at least one first face exposed directly to the solar radiation, blackened and treated on the surface to pick up the solar radiation and a second face, opposite the first, in direct contact over virtually the whole of its surface with said fluid, said foil transmitting the picked-up heat to said fluid through its thickness.

Abstract: A solar collector includes a plurality of panels overlapped along one direction such that each panel overlies a portion of one adjacent panel and underlies a portion of another adjacent panel to define overlapping areas. The panels are slightly transversely spaced from one another in the overlapping areas for flow of air therebetween to a plenum chamber at least partly enclosed by the panels. Heat absorbed by the panels from solar radiation is transferred to air flowing over the panels and through the spaces in the overlapping areas.

Abstract: A gravity protective system for pilots including a pressurized suit and a control system therefor for regulating the pressure in the suit in response to variations in acceleration along the thoracic axis of the pilot. Signals indicative of acceleration along the vertical axis of the aircraft and cosine function of the tilt angle of the pilot's seat are combined with a derivative function of their product to produce a control signal for regulating the air pressure within the suit. A threshold control limits regulation to acceleration above a predetermined level, and a feedback circuit from the suit ensures rapid response without oscillation.

Abstract: An improved cervical adjusting unit for applying a specifically directed force to the cervical spine of a patient to correct subluxations of the cervical spine, comprising an adjustable table for supportably positioning a patient in side posture thereon with the cervical spine in a preselected and prestressed configuration, the table including a first horizontal support surface for the pelvis and legs of the patient, a second adjustable support surface for supporting and positioning the thoracic and shoulder portions of the patient, and a headpiece which is adjustable in multiple directions to position the head of the patient; and a force applicator unit adjacent the headpiece of the table for directing a predetermined force against the cervical spine of the patient by means of a force-imparting stylus, the stylus being supported for universal adjustment with respect to the patient in a positionally adjustable force applicator head mounted on the outer end of an adjustable parallelogram section which is attac

Abstract: An adjustable finger splint made entirely of a single piece of spring steel wire which is bent into a configuration which includes a central arcuate section adapted to cup a portion of the circumferential curve of one of the dorsal and ventral surfaces of a finger or thumb. A pair of substantially arcuate arms extend in opposite directions from the ends of the central section in a lengthwise manner generally following the anatomical conformation of a finger which is to be splinted. A pair of arcuate support pieces in a somewhat rectangular shape are formed from the terminal ends of the arms. These support pieces are designed to cup the part of the finger into which they are in contact. The splint is worn with the terminal arm support pieces either under the finger for extension of the finger, or the terminal arm support pieces can be worn on the top of the finger for flexion of the finger. Heat sealed foam pads cover the central arcuate section and the terminal arm support pieces for comfort.

Abstract: An orthopedic device for precisely controlling the leg and hip movement of a handicapped individual in order to stabilize the position of the hips when walking and thus promote normal back muscle development and body growth. The apparatus of the invention includes a guide member and a slide mechanism operatively associated therewith. The guide member is rigidly connected to one of a pair of leg braces while the slide mechanism is similarly connected to the other leg brace of the pair. A very precise motion is translated from the guide and slide mechanism to the leg braces which directs the legs of the individual through a path of travel that holds the hips and pelvic region in a relatively normal horizontally aligned position.

Abstract: A therapeutic pressure strap primarily for the purpose of treating "tennis elbow" includes a flexible inelastic band having fastening means on both ends thereof for fastening around either the upper or lower extremities of a person, and includes a pressure concentrating portion on the inside of the strap for concentrating pressure on the particular portions of the extremity. The pressure applying portion includes a pair of resilient cylinders enclosed within a pocket. Alternate constructions show the cylinders to be either hollow or solid depending upon the force of the pressure to be applied.

Abstract: A piston type air pump, for forced lung ventilation, with a variable length of stroke and a variable timing of inspiratory and expiratory phases. The pump includes a stepless change, variable radius crank arm, controllable during pump operation for changing the volume capacity of the pump. The drive motor is arranged for movement for varying the timing of piston in-movement to the piston out-movement for varying the time ratio of inspiration to expiration.

Abstract: This disclosure describes an implantable microinfusion apparatus used to deliver an infusate systemically to an animal in accordance with a predetermined temporal program. The apparatus utilizes a pump to provide a hydrostatic force for the discharge of a plastic capillary tubing containing a linearly arrayed program of infusates. The tubing is charged with sequential discrete segments of fluid vehicle containing preselected concentrations of the product or products to be infused. The segments may be delimited by intervals of product-free immiscible fluid or the contents of the program tube may be stabilized by the inclusion of a gel in its fluid composition. The volume of the segments determines the infusion time of the various components of the program; the sequential position of the segments determines the order of their infusion, and the concentration of product in the segments determines the rate of their infusion.

Abstract: A pressure activated shut-off device which will prevent the flow of liquid in an intravenous administration set when the pressure in the system reaches a predetermined point. The shut-off device is utilized in an I.V. set wherein a pumping mechanism is utilized as the force for moving the liquid through a filter. The shut-off device has a biasing element which is set with a predetermined force so as to become activated and stop fluid flow so that the filter mechanism is not ruptured by excessive fluid pressure.

Abstract: A floating siphon-type regulator for incorporation in parenteral fluid administration sets and which is characterized by a design enabling a simplified, fast start-up procedure and which incorporates a simple, effective means for increasing or decreasing flow rates as called for by the viscosity of the particular solution being administered.

Abstract: A method and apparatus for delivering a small elongated flexible member into a body cavity. The apparatus includes a storage chamber opened at both ends for containing substantially the entire length of the member to be delivered with one end extending through the opening at the forward end of the chamber and the other end extending through the opening at the rear end of the chamber. A first valve is attached to the rear end of the chamber and has a passageway therethrough in communication with the interior of the chamber so that extension of the other end of the member through the valve and closing of the valve will retain the other end of the member in fixed position. A fluid port is positioned between this valve and the chamber and has a passageway in communication with the interior of the chamber. A second fluid port is attached to the forward end of the chamber in position on a nozzle and has a passageway therethrough in communication with the interior of the chamber.

Abstract: A cannula or catheter assembly has a cannula or catheter tube in a socket with a straight passageway. In order to equip such an assembly with a cheap and safe closure device which is easy to maneuvre without causing any movements injurious to the assembly, a connecting housing is fixedly or releasably connected to the socket and has a straight through-channel which is connected to the passageway of the socket and accommodates a hose section which seals against the channel wall and, to permit closing the through-channel, can be compressed at a location between its ends by means of at least one pressure body disposed in an opening in the wall of the through-channel and operable by means of a slide member movable in the axial direction of the through-channel on the outer side of the connecting housing.

Abstract: A novel hypodermic syringe and integral antiseptic dispenser, with the syringe having a barrel portion adapted to contain fluid to be injected. A needle is operatively mounted on one end of the barrel portion, and a plunger is located on the other end of the barrel portion, with appropriate manipulation of the plunger bringing about the injection of fluid from the needle. The improvement comprises a presoaked antiseptic dispenser that may be disposed on the barrel portion, with the antiseptic dispenser making it convenient to clean the intended injection site immediately before the injection. The antiseptic dispenser may take the form of a pad carried by the barrel portion of the syringe, or a generally cylindrical pad-carrying member encircling a portion of the needle end of the syringe, or any of a number of related configurations.

Abstract: The automatically acting injecting projectile, which may be fired from a rifle or handgun for anesthesia or drug treatment of animals, consists of a casing (9) on one end of which there is a plastic extension (10) and on the other a hollow needle (5). Gas propellant may be filled into pressure chamber (15) of the casing through a check valve (1) and channel (12). Upon impact of the injecting projectile in the body of the animal deformable projectile brake (7) is pushed back and jams on a stopping cone (6). At the same time outlet (5a) of hollow needle (5) is cleared by the moving sliding sleeve (8). Thus, piston (2) may be driven by the gas propellant, thereby injecting the drug contained in drug chamber (14) and the hollow needle into the surrounding tissue of the animal through outlet (5a).Charging with the drug before firing is carried out by puncturing a silicon caoutchouc seal (3) with a hypodermic needle through a puncture opening (4) in casing (9), and then injecting the drug into drug chamber (14).

Abstract: A device for breaking up impacted fecal from the rectum comprising an outer hollow tube having an opening at one end for introducing an enema solution into the tube cavity and having an opening at the other end for allowing the enema solution to pass from the tube cavity into the rectum, and a plunger assembly shaped to slidingly fit in the tube cavity and having prongs attached at one end which can be used to digitally break up the impacted fecal.

Abstract: A skin incising device for scar removal is disclosed comprising a holder and a first cutting member having an elongated relatively thin blade element with a continuous cutting edge characterized by a plurality of transversely disposed corrugations, the said corrugations being generally triangular in cross-sectional profile with at least one corrugation being rectangular in cross-sectional profile, said cutting member mounted on said holder such that the cutting edge projects outwardly therefrom. Also disclosed, as preferred embodiments, are means to adjust the depth of the skin incision of the device and imprint means releasably fastened to the device to first imprint an image on the skin of the intended incision pattern. Finally, a method for removing scar tissue is also disclosed in the present specification.

Abstract: A tourniquet, destined to be used in an emergency, particularly on the battlefield, comprises a strap and a combined mechanism for tightening the strap and indicating the pressure exerted on the limb. The mechanism consists of a casing which contains a spool on which the free end of the strap is wound up by means of a pawl and ratchet mechanism. This casing is slidingly movable on a plate attached to the second end of the strap and urged in a direction opposed to the tightening force by two spiral springs positioned between the plate and the casing. Two tongues integral with the plate are made to protrude out of the casing by a length proportional to the compression of the springs and are marked to indicate the pressure exerted on the limb by the strap. These marks also give an indication of the maximum force allowable for an arm or a leg, taking into consideration the circumference of the respective limb.

Abstract: Useful for removing kidney stones, gall stones and other objects from human body passages, the extracting device comprises a thin tubular rubber sleeve having its proximal and distal ends connected to the distal ends of outer and inner flexible tubes insertable into the body passage. The sleeve is inflatable by fluid pressure, supplied along the clearance space between the tubes to dilate the passage. The distal end of the sleeve is turned inside out and, when the sleeve is inflated, forms a soft annular flaring convex portion bulging beyond the distal end of the inner tube for sealing engagement with the stone, which is captured by suction, applied through the inner tube. Then, the inner tube is retracted, so that the suction pulls the stone within the sleeve while progressively turning the sleeve inside out around the stone to envelop the stone, for removal with the tubes.

Abstract: This invention relates to a cold therapy pack for use particularly in the relief of pain, swelling, or other discomforts of patients involved in cosmetic surgery in the facial area such as, rhinoplasty and blepharoplasty. The appliance comprises a goggle shaped plastic pack filled with a hydrophilic gel having the property of maintaining its pliability in a frozen state. As easily attached nose pack is provided when necessary.