Abstract: The specification sets forth a hammerspring for a dot matrix printer having a plurality of such hammersprings spaced along a hammerbank with permanent magnetics to draw said hammersprings into a retracted and uniformly stressed mode through a spring portion which are released by overcoming the magnetic retention, the hammerspring formed with a base portion connected to the hammerbank with a spring portion extending from said base portion having a decreasing transverse cross sectional area extending to an enlarged end portion for improved magnetic retention against said permanent magnets.

Abstract: The disclosure sets forth a diver's gauge boot having a first portion for receipt of a depth gauge and second portion for receiving a tank pressure gauge therein, with a sleeve for connecting the tank pressure gauge into a high pressure hose adapted for connection to a tank for indicating pressure in the tank, and a rotational connector between the first portion and the second portion with a pocket in the second portion for receiving a second instrument on a side of said second portion disposed away from said tank pressure gauge.

Abstract: The following disclosure comprises a medical autotransfusion and blood drainage reservoir for withdrawing blood from the site of an operation under vacuum. A walled reservoir is connected to the operation site and a vacuum is drawn therein to draw fluids from the operation site. Vacuum is provided by a piston pump connected to check valves. The check valves allow for movement of the piston pump in one direction to discharge air therefrom, and in the other direction to withdraw air from the reservoir. Alternatively a spring driven bellows can be used to draw a vacuum with attendant check valves. The inlet of blood flow is through a filter. Blood is then capable of flowing outwardly to be reinfused by autotransfusion or reinfusion at a later time. Vacuum indication means and bleed off valves are included for maintenance of a proper vacuum.

Abstract: The specification discloses a diver's snorkel having an elongated tube with a fitting at the end incorporating a mouthpiece. Distal from the mouthpiece is a water drainage purge chamber extending away from the mouthpiece. The entrance conduit interconnecting the elongated tube to the mouthpiece and the purge chamber is at an angle sloping downwardly from the mouthpiece during use. The purge chamber is angled inwardly toward a diver's chin when in use so that the axis thereof is at an angle to the axis of the mouthpiece. The purge chamber has a purge valve distal from the mouthpiece and incorporates a chamber of significant volume for drainage from the mouthpiece and the elongated tube in an unobstructed manner.

Abstract: Biomedical information is directly digitally telemetered from the patient through a frequency modulated transmitter to a remote receiver and computer station. A phase-lock-loop circuit in the digital transmitter compensates for DC data bias by averaging and generating a scaled measure of the DC content of the digital data fed into the phase-lock-loop circuit. The average signal is then provided as a control signal to a first voltage controlled crystal oscillator, the output of which is then used as a reference frequency for the phase-lock-loop circuit. Frequency modulation of the digital data is provided by coupling the digital data directly into the voltage control input of the voltage controlled oscillator which generates the output frequency. Further control of the phase-lock-loop circuit in the transmitter is achieved by prepositioning the operating frequency of the voltage controlled oscillator by means of a microcontroller.

Abstract: A plastic coupler for a catheter assembly including a distal member for attachment to a catheter tube and having a female luer lock connector for separable interconnection with a male connector of a proximal member having a self-sealing material disposed within a through passage for injection and a outer protective cap containing a sponge saturated with an antiseptic to bathe the self-sealing material and interconnection with an antiseptic, and a method for maintaining a coupler for a catheter assembly in aseptic condition.

Abstract: Poly(2-methoxy,5-(2'-ethyl-hexyloxy)-p-phenylenevinylene), MEH-PPV, useful as conductors or as sensors for halogens.

Abstract: An adjustable regulator of the type having fluid coupling oil within a cavity exposed to ambient pressure and overlying a diaphragm which operates based upon imbalances of said ambient pressure and an intermediate pressure zone on the other side of said diaphragm. The adjustment of the spring on the diaphragm is accomplished by means of a cap screw which is screwed into the sidewalls of the regulator within the cavity holding the oil. The oil is prevented from draining from the cavity by a second diaphragm overlying the oil in the cavity which can flex based upon changes in ambient pressure. The cap screw has a threaded extension in the form of a stem and tool surface on the other side of said stem for turning said cap screw.

Abstract: Method for the production of ultrapure sulfuric acid including distillation of sulfuric acid material for the removal of soluble impurities and insoluble and non-volatile particles of 10 microns to 0.2 micron or less in size. Reprocessing is also provided. Distillation takes place in a distillation chamber having walls which are provided with means within the chamber to provide smooth convective upward flow of distilling liquid and vapor proximate the walls and means for smooth convective downward flow substantially centrally of the distillation chamber. Redirection means and packing together with reflux means insure the washing of rising vapor and direct the condensing vapor substantially centrally of the distillation chamber. Ultrapure sulfuric acid is also provided having 5 or less particles per cubic centimeter of a size of 0.5 micron and larger and less than 10 ppb of any specific trace impurity such as cations.

Abstract: A combined cardiotomy and venous reservoir with filtration for autotransfusion of cardiotomy blood and venous blood during surgery and for postoperative wound site pleural drainage of shed blood for continued autotransfusion using the same unit. Vacuum regulation in the form of a manometer combined with a water seal are integral with the unit.

Abstract: Voice message storage from a first plurality of telephones, such as a plurality of coin operated pay phones, is provided by a multiprocessor system including a CPU, a software driven line card connected to each coin operated telephone line, and a single voice message computer. The voice message computer and the line cards are coupled together through a private internal data bus which is independent of the telephone lines and the central office switch systems. The voice message computer provides spot advertising of selected messages during dead times in the telephone connection, provides abbreviated, coin-free, speed dialing, coin box accounting, and remote automated coin box diagnostic monitoring. Voice messages are stored in the voice message computer, which originate both at a pay phone for later delivery to a phone through the central office switching system, or which originate with a telephone directly connected to the central office switching system.

Abstract: A process for coating metal on a substrate. The process uses organometallic compounds such as (trimethyl)(cyclopentadienyl) platinum in the presence of a reducing fluid such as hydrogen gas to produce high purity films capable of selective deposition on substrates containing, for example, tungsten and silicon. The films are deposited using chemical vapor deposition (CVD) or gas phase laser deposition. The invention also comprises devices made from the process of the invention.

Abstract: A printer tractor drive assembly is specified having a belt with pins which engage paper which is to be moved across a print station. The assembly includes a split lid covering the paper being driven. One portion of the split lid can be opened to expose and remove the paper along its perforations, while the other portion of the split lid retains the paper on the tractor pins.

Abstract: A dot matrix line printer is disclosed in which the amount of wear of an ink ribbon is measured by continuously compiling data representing impacting action of the printer as the printer prints.In one embodiment, this is accomplished by initially determining a dot count based on the length of the ribbon and representing the maximum theoretical useful life of the ink ribbon and then decreasing the initial dot count as printing thereafter commences. The dot count remaining is continuously divided by the initial dot count to determine the percentage of ribbon life remaining. When the dot count has been increased substantially to zero, a worn ribbon indication is provided to initiate an audible or visible alarm and to prevent further printing until the worn ribbon is replaced. As printing occurs the dots actually printed are counted, and this count is applied to reduce the initial dot count at a rate determined by the type of printing being undertaken.