...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7334291 | Suction brush assembly and a vacuum cleaner having the same A suction brush assembly comprises an assembly body having a suction inlet for drawing in dust on a surface being cleaned, a cover connected to the assembly body and having an opening for drawing in an external air, and a rotation body rotatably mounted to the assem... | 02/26/2008 |
| 7234197 | Unattended spot cleaning apparatus A spot cleaning apparatus comprises a fluid distribution system, a fluid recovery system, an agitation system, and a controller system to automatically monitor and control inputs and outputs to said systems for removal of spots and stains from a surface without atte... | 06/26/2007 |
| 6493289 | Ultrasonic cleaning apparatus Provided is a vibrating section having an ultrasonic transducer of piezoelectric elements and a rear ultrasonic horn and a front ultrasonic horn, the horns being joined to the transducer. The ultrasonic transducer has a consumption power set at 8W or less... | 12/10/2002 |
| 5875517 | Vacuum cleaner and suction head for use with the vacuum cleaner A vacuum cleaner having a suction head is provided with means which are capable of vibrating the suction head contact surface with respect to the surface to be cleaned. This vibration activates the existing contact surface of the suction head and integrat... | 03/02/1999 |
| 5778485 | Probe card cleaning apparatus, probe apparatus with the cleaning apparatus, and probe card cleaning method A cleaning apparatus for cleaning a probe card having a contact element to be brought into electrical contact with a pad of a circuit to be inspected, comprises a conductive brush to be brought into contact at least with the contact element to clean the p... | 07/14/1998 |
| 5214479 | BTR air cleaner with biased shims Apparatus for cleaning residual toner and paper fiber residue from a biased transfer roll (BTR) in an electrophotographic apparatus using high velocity air and substantially contactless flexible biased conductive shims. The high velocity air flow between ... | 05/25/1993 |
| 4939808 | Carpet cleaning apparatus Multiple side-by-side vacuum nozzles are reciprocated along paths of travel parallel to the preferred path of travel of carpet cleaning apparatus. The vacuum nozzles are propelled through a drive mechanism which moves each vacuum nozzle out of phase with ... | 07/10/1990 |
| 4872238 | Vehicle treatment apparatus Vehicle drying apparatus for use in either roll-over, drive-through, or tunnel type car washing installations. The dryer comprises an air plenum tube which extends overhead and transversely of the drying location and has a plurality of air outlet nozzles,... | 10/10/1989 |
| 4800616 | Air powered duct cleaner and crawler The cleaning apparatus is formed by a housing member adapted to be inserted into an air duct and which has two spaced apart ports for providing an air flow path through the housing member. A flexible hose has one end coupled to one of the ports and is emp... | 01/31/1989 |
| 4543684 | Apparatus for cleaning plastics forming mold faces An apparatus for cleaning plastics forming mold faces comprising composite brushes each consisting of a vibratory brush adapted to be vibrated in a vertical direction or in unspecified directions by a vibrating mechanism, and a rotary brush annularly surr... | 10/01/1985 |
| 4468835 | Air vibrated dust brush A ribbon of flexible fabric (e.g., nylon) is folded and riveted near the fold to form an attachment loop. The loop is then coupled on a centrally located support rod inside an air duct, the ribbon ends extending beyond the exit of the duct. When air is fo... | 09/04/1984 |