Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 4669584 | Inertia stop for sudden loads An inertia stop by which excessive movement between two members may be prevented, includes a unit that may be fixed to one of the members and a further unit that includes a free component and a component that may be fixed to the other of the members, one ... | 06/02/1987 |
| 4635567 | Monitoring of burner operation Three burners are supplied with pulverized fuel entrained in air from a splitter and are brought to combustion under optimum conditions by adjustment of the secondary air flow to each. The rates of flow of primary and secondary air are determined and sign... | 01/13/1987 |
| 4612958 | Boiler safety valve installations A boiler safety valve installation with a safety valve discharging relief steam through an upstand into a separately supported vent pipe. The upstand discharges through a belled nozzle approximately 30° (0.5 steradian) included angle into the vent pipe t... | 09/23/1986 |
| 4601222 | Tool head assembly A tool head assembly for use in preparing a tube for welding including a center pilot which is rotatable. The center pilot is adapted to enter a bore of a tube to center the tool head assembly by being provided with ball bearings which rotate around the i... | 07/22/1986 |
| 4449387 | Tube bending machine A tube bending machine with rotary arms carrying a bending moment roller and a bending fulcrum roller has arm shafts mounted for axial movement. The arms are rotated for the tube bending action, whereby the bend so made in the tube lies in a predetermined... | 05/22/1984 |
| 4442678 | Vapor generating and vapor superheating installations A vapor generating and vapor superheating installation for marine propulsion purposes, and a method of operating such an installation. The installation including a vapor generating and vapor superheating unit adapted to be fired with fluent fuel including... | 04/17/1984 |
| 4424754 | Burner control The invention is concerned to control the combustion conditions of a burner 1 supplied with a mixture of pulverized fuel and air. By use of a vortex amplifier 10 in the supply pipe 3, the supply of fuel is interrupted so that the flame is consequently fir... | 01/10/1984 |
| 4387577 | Boilers A power plant forced-flow boiler operative with water letdown wherein the letdown water is arranged to deliver heat to partly expanded steam passing through a steam reheater connected between two stages of a prime mover. The heating of steam in the reheat... | 06/14/1983 |
