| Patent Number |
Title Of Patent |
Date Issued |
| 5193611 |
Heat exchangers |
March 16, 1993 |
| A heat exchanger including a plurality of fluid pathways (13, 15, 16, 17, ) in which at least some are defined between surfaces of unperforated primary plates (10). Between the primary plates (10) are at least two secondary perforated plates (12) extending along the fluid pathway (13, |
| 5036710 |
Multi-phase flowmeter |
August 6, 1991 |
| A flow meter for measuring liquid and gaseous flow rates in a mixed fluid ow has one or more helical fins (17) positioned between a cylindrical sleeve (10) and a core member (11). Centrifugal effects resulting from fluid flow though channels (29) defined between fins (17) sleeve (10) and |
| 4987574 |
Helium-neon lasers |
January 22, 1991 |
| A stabilized helium-neon laser emits radiation in the ranges of ultra-violet, infra-red and visible other than red in at least two modes. A stabilizing system consists of an alignment heater (19) which bends the laser tubes toward optimum alignment, a coil heater (20) which cyclically |
| 4947356 |
Aircraft cabin noise control apparatus |
August 7, 1990 |
| In propeller of fan driven aircraft, cabin noise levels may be reduced by adjustment of the phase relationship between a reference propeller or fan and some or all of the other propellers or fans. An aircraft cabin (1) contains four microphones and two loudspeakers which form the active |
| 4944606 |
Precision motion slideways |
July 31, 1990 |
| A plain bearing slide system has a carriage mounted on a slide by use of bearing pads. Each bearing pad is coated with a layer of polymeric material having a convex surface, and is arranged to ride on a counterface. The combined thickness of the layer and a layer providing the counte |
| 4905972 |
Damped spring |
March 6, 1990 |
| A combined spring and damper comprises a plurality of spring elements (1), each of zig-zag form, disposed in radial planes with respect to a common axis. Also situated on the axis is a mass (7) of resilient material. When the spring is compressed along the axis the inward contraction of |
| 4905540 |
Fibre reinforced plastic connecting rod |
March 6, 1990 |
| A connecting rod has a rod member formed from fiber reinforced plastic material secured to a cap member to define the big end of the connecting rod. Securement is by a metal member rigidly attached to the rod member, to which the cap member is secured. Attachment of the rod member and th |
| 4643822 |
Method of separation of material from material mixtures |
February 17, 1987 |
| A method of separating the constituent minerals of a mixture of minerals requires the introduction of fine particles of magnetic material such as finely ground particles of magnetite. The control of the zeta-potential of the minerals and particles of magnetic material provides heterocoag |
| 3971217 |
Reciprocatable devices |
July 27, 1976 |
| A fluid operated reciprocatable device has an outer, usually fixed, member nd an inner relatively movable member joined by a resilient member e.g., of rubber. The outer member is closed at one end so as to form an enclosure into which fluid under pressure can be admitted so as to displace |
| 3967393 |
Underwater solids collecting apparatus |
July 6, 1976 |
| The invention concerns an apparatus for collecting solids from the bed of a iquid or for establishing an anchorage in the bed of a liquid. The apparatus comprises essentially a substantially hollow structure into which solids from the liquid bed are induced as solids in liquid suspens |
