Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 5415480 | Printer having a stepping motor for driving and retaining a type wheel In a printer which selects a character by moving a type wheel by a stepping motor, phases other than a stable phase of windings of the stepping motor are shorted when a rotor of the stepping motor comes to a vicinity of a stable point of a target phase, a... | 05/16/1995 |
| 4776713 | Home position detecting apparatus for a print wheel A home position detecting apparatus includes a detector to generate a detection signal when the home position of a print wheel is detected and a stepping motor to rotate the print wheel in response to a drive signal. This home position detecting apparatus... | 10/11/1988 |
| 4544289 | Print disk positioning system A print disk positioning system is disclosed herein which provides rotational and lateral movement of a print disk (20) having raised or depressed characters thereon with the objective of locating the appropriate character within the jaws of a printing st... | 10/01/1985 |
| 4464071 | Detent apparatus for print wheel A serial printer comprising a print wheel having numerous type bearing spokes, each of which extends radially and which is provided with a type element on the tip of the spoke, a stepping motor for rotating the print wheel, a print hammer for striking the... | 08/07/1984 |
| 4414496 | Electronic typewriter and its control apparatus An electronic typewriter comprising: a keyboard having a plurality of keys and generating an encoded signal in response to the depression of each key; a printing unit having a print wheel with a plurality of type elements disposed around the periphery the... | 11/08/1983 |
| 4215943 | Motor driven single element printer A printer has a horizontally movable carrier which supports a print head including a print element on which are disposed type characters in a two dimensional array with the element controllably movable by motors in two degrees of freedom to selectively po... | 08/05/1980 |
| 4192619 | Electronically controlled printer system A printer has a print shell on which are disposed type characters in a two dimensional array with the shell controllably movable in two degrees of freedom to selectively position each type character opposite a record-medium-carrying platen for printing. I... | 03/11/1980 |
| 4131840 | Circuit arrangement for setting a rotatable type carrier over the shortest path of rotation A circuit arrangement is provided for setting a type carrier, having character types arranged on the periphery thereof, from a present setting position to a new setting position over the shortest path of rotation, via a stepping motor, by means of pulse t... | 12/26/1978 |
| 4099106 | Composite pulse motor for a timepiece A compound pulse motor for driving a printer or the like comprising an armature having linear magnetic poles and rotational magnetic poles and a stator having stationary linear magnetic poles and stationary rotational magnetic poles. In operation, the lin... | 07/04/1978 |
| 4036349 | Combined mechanism for impacting a print member and advancing a printing ribbon A combined mechanism for impacting a print member and advancing a printing ribbon of a high speed printer wherein an electromagnet, located near and on a yoke mechanism containing the print stem shaft of the print head, operate together with a linkage mec... | 07/19/1977 |
| 4019615 | Low inertia impact printing means In a print head, a print wheel comprising the combination of a disk, a plurality of permanently magnetized printing members bearing characters thereon, and electromagnet imparting translation to the printing members by magnetic interaction, and also provi... | 04/26/1977 |
| 3986094 | Logic system for print ball tilt control A logic system for controlled energization of predetermined stepper motor phases for various optimal times employing a read only memory having a plurality of memory element arrays corresponding to predetermined stepper motor sequencing commands correspond... | 10/12/1976 |
| 3985218 | Low inertia impact printing means In a print head, a print wheel comprising the combination of a disk, a plurality of permanently magnetized printing members bearing characters thereon, and electromagnet imparting translation to the printing members by magnetic interaction, and also provi... | 10/12/1976 |
| 3954163 | High speed printer with intermittent print wheel and carriage movement A high-speed printer with a printing wheel with the individual type elements supported by radially extending spokes. Separate servo systems provide intermittent movement for the printing wheel and the carriage carrying the printing wheel.... | 05/04/1976 |
| 3941229 | Serial printing device A serial printing device comprises a type drum rotatably mounted on a carriage which can move parallely to a platen. On the periphery of the type drum are mounted a plurality of character-bearing elements urged against the drum by biasing means. A steppin... | 03/02/1976 |
