Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 6572338 | Modular air circulator control The modular timer for an air circulator comprises a timer for energizing an air circulator motor for a predetermined amount of time. A first connector connects the timer to an air circulator motor while a second connector connects the timer to a power swi... | 06/03/2003 |
| 5934869 | Fan cleaning system and easily cleaned fan A fan cleaning system includes a fan having a motor mounted to a support structure. A fan blade is mounted to a shaft of the motor and enclosed by a fan guard. In one aspect of the invention, the fan guard comprises a front guard and a rear guard having a... | 08/10/1999 |
| 5565720 | Remote motor switch and capacitor assembly An industrial electric fan motor has a remote hand set in which both a switch and a motor capacitor are disposed. The remote hand set is connected to a casing of the fan motor by a control cord with a selectively engageable plug. The switch and the capaci... | 10/15/1996 |
| 5240378 | Space efficient fan guard A fan comprises a pair of guard halves which surround an impeller. One of the guard halves is smaller than the other guard half, such that the smaller of the two may be stacked within the larger to reduce the required space for packaging. Due to the inven... | 08/31/1993 |
| 5130587 | Fan motor 2-speed switch with protective housing A modular motor end dome for an industrial electric fan motor has a motor capacitor, and is provided on the rear end with a protective axial cavity in which may be seated the threaded mounting stem and attachment nut of an internally mounted pull chain el... | 07/14/1992 |
| 5002462 | Hinged and quick mount guard for an electric fan A hinged and quick mount guard for an electric fan. The fan guard includes a concave, dish-shaped rear guard member having an axial opening for the reception of a fan motor shaft, and a plurality of key holes for the reception of thru-bolts on the fan mot... | 03/26/1991 |
