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 |
| 7121391 | One-way clutch A one-way clutch. The one-way clutch includes a passive member, an active member, and a rolling member. The passive member has an outer circumferential surface and a sliding portion. The sliding portion extends from the outer circumferential surface to the interior ... | 10/17/2006 |
| 7119665 | Sound generator for a kite A sound generator including a mounting clip for attachment to a kite frame. A support arm is secured to, and projects from, the mounting clip. The support arm has a distal end remote from the mounting clip. A pivot mechanism is secured to the distal end of the suppo... | 10/10/2006 |
| 7066106 | Reverberating mechanical siren A small light mechanical siren for mobile emergency equipment which utilize spiral rebound ramps in the rotor to produce a loud penetrating square form spiral sound wave, enabling effective warning without contributing to noise pollution. ... | 06/27/2006 |
| 5619181 | Vibratory alerting device with audible sound generator An alerting device for a selective call receiver (100) efficiently generates a tactile vibration alert and an audible alert simultaneously. A vibrator motor (15) includes a modified eccentric weight (14) which becomes an efficient air mover upon being rot... | 04/08/1997 |
| 5563574 | Electronic sound producing game animal distraction device for use by a hunter An electronic sound producing device for use by a hunter including a transmitter mechanism for generating and transmitting into free space one of a plurality of radio signals and with the radio signal selectable by the hunter; a coupling mechanism for sec... | 10/08/1996 |
| 5517173 | Apparatus generating noise sound for electric car An apparatus for generating a noise sound, which is equipped in industrial electric cars with little or no driving sound and generates an appropriate amount of noise sound so that the nearby cars or pedestrians can notice their approch in a narrow pathway... | 05/14/1996 |
| 5402102 | Remote control operator for game callers A device, which is operated at a distance by pulling on a string acting upon a bellows, for blowing a stream of air under pressure into a game caller. The apparatus is used to draw an animal in a selected direction, and to attract and hold that animal's a... | 03/28/1995 |
| 4847590 | Outdoor warning siren An improved outdoor warning siren comprising an electromechanical siren together with a multi-segment horn which effects an exceptionally smooth transition from a small high pressure area at the horn inlet to a larger low pressure area at the horn outlet ... | 07/11/1989 |
| 4807203 | Siren A siren comprises a compressed air supply which is deflected by stationary deflectors to exit radially through stator ports. A rotor with spaced ports rotates between the stator and deflector thereby opening and closing the stator ports. Stationary vanes ... | 02/21/1989 |
| 4710749 | Siren with remote driver An electronic siren includes a driver unit and a speaker unit which are interconnected by a flexible sound pipe. The sound pipe is acoustically coupled to the driver unit and speaker unit by adaptors which provide a substantially smooth transistion from a... | 12/01/1987 |
| 4691194 | Electric alarm siren with arc-like runner legs An electric alarm siren of low power has a relatively high sound intensity and a good timbre due to a runner with arch-shaped blades. The electric alarm siren includes a central part which is divided by a partition wall into a driving part with a built-in moto... | 09/01/1987 |
| 4649853 | Siren A siren comprises a compressed air supply which is deflected by stationary deflectors to exit radially through stator ports. A rotor with spaced ports rotates between the stator and deflector thereby opening and closing the stator ports. Stationary vanes ... | 03/17/1987 |
| 4615530 | Method of sealing between relatively movable components A siren comprises a compressed air supply which is deflected by stationary deflectors to exit radially through stator ports. A rotor with spaced ports rotates between the stator and deflector thereby opening and closing the stator ports. Stationary vanes ... | 10/07/1986 |
| 4558656 | Siren A siren comprises a compressed air supply which is deflected by stationary deflectors to exit radially through stator ports. A rotor with spaced ports rotates between the stator and deflector thereby opening and closing the stator ports. Stationary vanes ... | 12/17/1985 |
| 4554531 | Omnidirectional siren The stator of the sound generator in the siren of this invention is mounted on struts that diverge upwardly from the top of an upright post, with its axis coinciding with that of the post. The coaxial rotor of the sound generator is driven by a motor moun... | 11/19/1985 |
| 4529969 | Siren An improved siren including means for producing and directing sound energy against a rotatable reflector which directs the sound waves out from the siren in a generally horizontal direction and which due to rotation of the reflector about a vertical axis ... | 07/16/1985 |
| 4393374 | Low power siren A low power siren having a high power sound and good tonal pattern. The siren consists of a casing with a motor and shaft protruding into a second casing. The inlet into the second casing allows for the passage of air, passing a rotor. Air cutters around ... | 07/12/1983 |
| 4138673 | Small siren having protective screen A siren for an alarm adapted to be driven by a fractional horsepower motor and provided with a cup shaped rotor cooperating with a stator provided with perforations in the cylindrical flange thereof, and a drawn, cup-shaped screen or grille seated over th... | 02/06/1979 |
