Abstract: A barometer having an index on the crystal. The crystal is freely rotatable for setting the index. The barometer case has spring fingers preventing the crystal from being removed therefrom unless the fingers are disengaged by means of a suitable tool.

Abstract: A sphygmomanometer system having a cuff, etc, and including both a regulator valve which normally bleeds the cuff pressure down at a substantially constant slow rate, and an exhaust valve which is operable to provide three rates of bleed, to wit nil, fast (as compared to the regulator valve bleed rate) and dump, the two valves together providing cuff bleed in accordance with predetermined schedule. The exhaust valve includes an elastic annular member compressible to achieve the fast and dump rates.

Abstract: A sphygmomanometric system having a pump for pumping air into a sphygmomanometer cuff connected to the cuff via a regulator valve for bleeding the cuff pressure at a constant rate. The pump has a leak to atmosphere so that the regulator valve can bleed the cuff through the pump. An exhaust valve is also provided for dumping the cuff pressure to atmosphere and/or bleeding the cuff, independently of the regulator valve.

Abstract: A sphygmomanometric system having a cuff, etc., and regulator valve for bleeding air out of the sphygmomanometer cuff so that the cuff pressure drops at a substantially constant rate. The valve is in the form of a closed rubber tube having a slit with a pin holding the slit slightly open. Air can therefore be freely pumped into the tube, out the slit and into the cuff, but cannot flow back except at a restricted rate.

Abstract: An electromagnetic flowmeter having a small-bore flow tube having a thick-walled plastic tube having a conically-relieved electrode-receiving bore. A compression ring around the conical part of the tube squeezes the plastic sealingly between the electrode and the ring. In assembly, compressive force exerted by Belleville springs or washers causes the plastic to flow into sealing contact with the electrode.

Abstract: A blood pressure testing kit having the usual elements, namely, pressure gauge, humeral cuff, pump, bleed valve, and appropriate interconnections, and a stethoscope, is provided with a case which is in two parts hinged together but made of one integral piece of "living hinge" plastic material. One part of the case provides for storing all the said elements but the pressure gauge, which is mounted in the other case part, which acts also as lid for the same part. When the case is open, all the elements are manually accessible for use in blood pressure testing, and at the same time, the pressure gauge can be read while the testing procedure is being carried out.

Abstract: A magnetic flow meter nulling system wherein each electrode has connected thereto an in-phase voltage adjusting network and a phase-shifted voltage adjusting network. In particular, each electrode is connected in a loop with a slide wire of a potentiometer. The slider of one potentiometer is connected directly to the measuring circuit whereas the other potentiometer's slide wire has the slide wire of a third potentiometer connected across, the said other potentiometer having its slides connected directly to the measuring circuit and the slider of the third potentiometer being connected to the measuring circuit via a capacitor.

Abstract: A dental chair having a backrest and a seat each of which is angularly adjustable about a common horizontal axis. A motor drives a linkage system which simultaneously angularly adjusts both backrest tilt and seat inclination to positions ranging from one in which the chair supports the patient in substantially sitting position, to one in which the patient is reclining with his head below the rest of his body. As compared to the seat, the angular motion of the backrest is relatively uniform over the range of adjustment, whereas most of the angular motion of the seat occurs during the middle 50% of the range.

Abstract: An electromagnetic flowmeter having a flow tube wherein the electrodes leads pass through potting material forming part of the lining of the flow tube. The leads emerge at the exterior of the flow tube at three points, two of which substantially are at the electrodes, and one of which is between the two electrodes, via conduits embedded in the potting material and exiting from the flow tube at said points. The leads are accessible for repair or replacement.

Abstract: A magnetic flowmeter system having a high impedance double ended AC preamplifier stage for amplifying voltages induced in a fluid flowing in and transverse to the field of an AC energized electromagnet. The preamplifier output voltages are amplified in a single-ended AC amplifier. The output voltage of the AC amplifier is demodulated by a phase sensitive detector. The DC output voltage is divided by a DC voltage derived from the AC source of energization for the electromagnet, so a net output voltage results which is free of common mode and quadrature voltages and independent of field fluctuations, but is obtained without feedback to the input of the system.

Abstract: An infrared generator wherein an ellipsoidal reflector has a source rich in infrared radiation at one focus thereof. The end of the reflector at the other focus merges with a paraboloidal reflector positioned so that the focus of the latter reflector coincides with the said other focus of the former. The axes of the reflectors intersect at right angles to each other.

Abstract: An electromagnetic flowmeter having its field coils inside a flow tube through which conductive fluid passes. The tube has a lining of material which is appropriate to the nature of the fluid. The coils are contained within boxes which are fixed to the inner wall of the flow tube, and embedded in or under the lining material.

Abstract: An infrared generator wherein an ellipsoidal reflector has a source rich in infrared radiation at one focus thereof. The end of the reflector at the other focus merges with a paraboloidal reflector positioned so that the focus of the latter reflector coincides with the said other focus of the former. The axes of the reflectors intersect, preferably at right angles to each other.