Glam girl Heddy Lamar may have used her good looks to good effect on the silver screen, but she put her smarts to better use as an inventor. During World War II, she co-patented a frequency-switching system for torpedo guidance that was considered years ahead of its time.
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| Number | Title | Issue Date |
| 4902176 | Processing apparatus which may be selectively set in two positions in accordance with fluid pressure A drive shaft rotated by an electric motor is disposed to penetrate through a main body, and a spindle is concentrically mounted at the distal end of the drive shaft so that the rotational force of the drive shaft moving in an axial direction thereof is t... | 02/20/1990 |
| 4560373 | Surgical nozzle apparatus A surgical nozzle apparatus used for removing an undesired tissue with a jet of pressurized fluid. A handpiece including a fluid injecting nozzle piece and a valve assembly capable of cutting off the supply of the pressurized fluid to the nozzle piece, fu... | 12/24/1985 |
| 4505638 | Underwater hydraulic motor A turbine-type underwater hydraulic motor includes a hermetically sealed chamber filled with oil, and bearings of rotating parts and a reduction gear unit are sealed in said sealed chamber. A part of the partitions isolating the sealed chamber from the ex... | 03/19/1985 |
| 4500262 | Variable pressure and displacement reciprocating pump The present invention relates to a reciprocating pump in which a plunger is reciprocated by means of a crankshaft, a connecting rod and a crosshead. The reciprocating pump further includes cushioning means which is disposed between the crosshead and the p... | 02/19/1985 |
| 4196609 | Tube expander Disclosed is a tube expander in which a mandrel itself is in the form of a short metal bar and the mandrel is fitted into a cage having loosely fitted therein a plurality of rollers adapted to perform a tube expanding function. The forward end of the mand... | 04/08/1980 |