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An automatic bed maker which uses the expansion of inflatable bladder to straighten, align, and tuck-in bed-cover assembly.
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| Number | Title | Issue Date |
| 7350693 | Indexing mechanism An indexing mechanism comprising a body (10) mounted so as to be rotatble about an axis; means (3) for rotating said body about said axis; first cam means (9, 10) for displacing said body along said axis away from an axial rest position during r... | 04/01/2008 |
| 6513708 | Mathematics teaching system A mathematics teaching system for visually and physically teaching a student how to perform multiplication and division calculations in a simple to understand format. The mathematics teaching system includes a housing having a plurality of apertures align... | 02/04/2003 |
| 5971269 | Computational teaching device A teaching device comprising a group of balls, a first counter, a second counter and a tray interconnecting the first counter to the second. The first counter represents the problem to be solved, and the second counter indicates the solution to the proble... | 10/26/1999 |
| 5026973 | Number wheel counters A number wheel counter has a worm wheel connected with the least significant number wheel. A worm gear engaged with the worm wheel is mounted for both rotational and translational movement about a spindle. Cam means are provided such that as the worm gear... | 06/25/1991 |
| 4218609 | Educational mechanical calculator A mechanical calculator employs a register consisting of gears. Each register gear has two sets of teeth. One set has teeth all around the circumference of the wheel while the other set consists of a single carry-over tooth. The register gears are spaced ... | 08/19/1980 |
