Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7183507 | Appliance having a timer A timer for an appliance is activated by the appliance user to display elapsed time on a time display device mounted on and/or integral with the appliance. The timer may be initialized by a separate initialization mechanism or simultaneously with the user activating... | 02/27/2007 |
| 7009122 | Push-to-start appliance program timer and method utilizing snap-action switch A program timer for use with commercial or consumer appliances provides a single user knob interface that allows the desired selection of a programmed cycle and a push-to-start function. To preclude inadvertent program operation and enhance the life of the program t... | 03/07/2006 |
| 7005589 | Timer A cam-operated timer for a household appliance. The timer includes a rotatable cam-carrying member having cam surfaces, a drive mechanism to rotate the cam-carrying member, a plurality of cam-actuated switches each mounted for engagement with a cam surface, and a te... | 02/28/2006 |
| 6917001 | Time switch A time switch that provides a convenient time setting method through a sub-dial that can be rotated clockwise or counter-clockwise. A gearwheel set, through which motor torque is conveyed to a dial, includes a ninth drive gear and a ninth shank gear which is joined ... | 07/12/2005 |
| 6727440 | Electromechanical program timer with delay sections An electromechanical program timer provides at least a section with a slower timing speed besides a major timing speed. The timer includes a driving motor rotationally drives a driving shaft. A driving gear and an eccentric shaft are formed on the driving shaft for ... | 04/27/2004 |
| 6613991 | Timer A cam-operated timer includes a rotatable cam-carrying member having cam surfaces thereon, a timing motor, a drive mechanism, a plurality of cam-actuated switches and a switch wafer mounting receiving first and second switch wafers, with one of the wafers... | 09/02/2003 |
| 6583371 | Timer Cam-operated timers for various appliances, such as a clothes washer and a dryer, wherein the timers that are nearly identical from the user's standpoint. For example, the timer may be provided on both a clothes washer and a dryer. Each timer may be set a... | 06/24/2003 |
| 6483052 | Electromechanical appliance programmer/timer A programmer/timer having a cam disk that includes concentric cam tracks having multiple working heights formed on one face thereof. The programmer/timer further includes a plate assembly that includes multiple cam followers for engaging cam disk and a pl... | 11/19/2002 |
| 6121889 | In-wall electronic timer An in-wall mounted electric timer comprising a housing for mounting in an electric box in a wall. The electric timer comprises a user interface on the housing. The user-interface comprises an input panel and a display. The electric timer further includes ... | 09/19/2000 |
| 6080943 | Timer A cam-operated timer for a household appliance has a variety of improvements. An audible and tactile feedback member engages a textured surface on the cam wheel, to produce desired audible and tactile feedback when the timer is manually set. When the time... | 06/27/2000 |
| 5990426 | Cam-operated timer quiet cycle selector An appliance timer has features to facilitate automated assembly or manual assembly. A timer housing base accepts timer components from two directions, and installation of components in either direction is along a straight axis. A motor in the timer engag... | 11/23/1999 |
| 5955796 | Programmable wall switch actuator/timer A self-contained programmable wall switch actuator/timer unit can easily be mounted directly onto the outside of the face plate of a standard wall switch. This actuator/timer unit can be programmed to operate the lever of the wall switch in accordance wit... | 09/21/1999 |
| 5949038 | Cam-operated timer quiet cycle selector using a camstack with a plurality of drive teeth An appliance timer has features to facilitate automated assembly or manual assembly. A timer housing base accepts timer components from two directions, and installation of components in either direction is along a straight axis. A motor in the timer engag... | 09/07/1999 |
| 5929403 | Appliance timer having a maskable double throw subinterval mechanism A timer for controlling an appliance includes a top subinterval circuit which is used to control an appliance function. The top subinterval circuit has electrical circuit blades which are movable to open and to close the top subinterval circuit. The timer... | 07/27/1999 |
| 5910649 | Method and apparatus for controlling an appliance having a switch blade which includes staggered electrical contacts An appliance timer has features to facilitate automated assembly or manual assembly. A timer housing base accepts timer components from two directions, and installation of components in either direction is along a straight axis. A motor in the timer engag... | 06/08/1999 |
| 5889244 | Dishwasher sequence switch unit A sequence switch unit for use in a dishwasher eliminates a need for a separate timer and relay for each dishwasher component during the washing portion of the cycle. In one embodiment, the sequence switch unit includes a switch disk having a plurality of... | 03/30/1999 |
| 5889243 | Time switch with clutch mechanism and cam operated contacts The drive train of an appliance timer includes a slip clutch formed of a triangular spring meshing with the outer flat surfaces of a hexagonal drive shaft. The slip clutch is incorporated into a drive pinion in the appliance timer drive train. Excessive t... | 03/30/1999 |
| 5866863 | Apparatus for permitting quiet manual setting of an appliance timer An apparatus for permitting quiet manual setting of an appliance timer is disclosed. The apparatus has an appliance control cam which has a first cam surface defined on a first side thereof and a second cam surface defined on a second side thereof. The ap... | 02/02/1999 |
| 5861590 | Cam-operated time quiet cycle selector An appliance timer has features to facilitate automated assembly or manual assembly. A timer housing base accepts timer components from two directions, and installation of components in either direction is along a straight axis. A motor in the timer engag... | 01/19/1999 |
| 5834718 | Appliance timer having a switching mechanism for high-current carrying circuit blades and associated method A timer for controlling an appliance includes a cam having a first cam surface and a second cam surface defined therein. The first cam surface is distinct from the second cam surface. The timer also includes a first circuit blade which cooperates with the... | 11/10/1998 |
| 5828019 | Motorized sequencing switch assembly A rotary cam actuated sequence switch assembly having a reversible electric drive for forward and reverse movement to selectively position the cam for actuating a plurality of switches in a desired sequence under electronic control of the motor. Reverse r... | 10/27/1998 |
| 5811746 | Cam switch mechanism A cam switch mechanism comprises a drive source, such as a motor, a cam driven by the drive source, a switching device responsive to contacting the cam surface of the cam for switching its electrically conducting state and a control unit, such as a microc... | 09/22/1998 |
| 5780791 | Timer for controlling an appliance having a plurality of pawls which rotate a camstack A timer for controlling an appliance includes a camstack which is continuously rotated during a portion of an entire operation cycle of the appliance. The camstack is rotated in either a slow mode of operation or a fast mode of operation. The timer furthe... | 07/14/1998 |
| 5739490 | Cam-operated timer pawl drive An appliance timer has features to facilitate automated assembly or manual assembly. A timer housing base accepts timer components from two directions, and installation of components in either direction is along a straight axis. A motor in the timer engag... | 04/14/1998 |
| 5736699 | Elecro-mechanical programmer/timer The present invention provides an electro-mechanical programmer/timer having a plurality of switches actuated by a rotating program cam with each of the switches tracking a separate cam track on the cam. The program cam is indexed by a pawl which engages ... | 04/07/1998 |
| 5684281 | Timer camstack and clutch An appliance timer has features to facilitate automated assembly or manual assembly. A timer housing base accepts timer components from two directions, and installation of components in either direction is along a straight axis. A motor in the timer engag... | 11/04/1997 |
| 5652418 | Cam-operated timer subinterval switch An appliance timer has features to facilitate automated assembly or manual assembly. A timer housing base accepts timer components from two directions, and installation of components in either direction is along a straight axis. A motor in the timer engag... | 07/29/1997 |
| 5637843 | Electromechanical programmer/timer A cam disc has a dual row of ratchet teeth on the periphery for dual rate of advancement by either of two oscillating motorized advance pawls. The disc has alternating high and low concentric cam tracks formed on one face. A plate is registered on the cam... | 06/10/1997 |
| 5397930 | Programmable wall switch plug-in timer A plug-in timer has a set of input terminals and a set of output terminals as well as a contactor operable to make and/or break electrical connection between these sets of terminals in accordance with a pre-setable 24 hour program. The timer is powered fr... | 03/14/1995 |
| 5309032 | Wall switch timer A plug-in timer has a set of input terminals and a set of output terminals as well as a contactor operable to make and/or break electrical connection between these sets of terminals in accordance with a pre-setable 24 hour program. The timer is powered fr... | 05/03/1994 |
| 5220542 | Anti-rotational device for a cam-operated timer An anti-rotational device for a cam-operated timer is used in appliances with timer control knobs that recess when the appliance is operating. A spring biased axially displaceable shaft that carries a circular disc having teeth peripherally disposed aroun... | 06/15/1993 |
| 5170022 | Electromechanical programmer with smooth program preselection A electromechanical programmer with smooth program preselection having a rotating main cam unit for executing several operating programs, a first cam for allowing step passage with the main cam unit driven in rotation by a micromotor through a speed reduc... | 12/08/1992 |
| 5166481 | Timing mechanism with improved electrical contacts A timing mechanism having electrical switches opening and closing in response to power driven rotating cams. The electrical switches are composed of fixed and movable electrical contact blades which include electrical contacts carried on the blades. For t... | 11/24/1992 |
| 5138120 | Timing mechanism with a PTC thermistor A timing mechanism has cams operating switches which control the functions of an appliance and another cam operating another switch supplying short pulses to a separate function such as a warning buzzer. A PTC thermistor is in series with the switch suppl... | 08/11/1992 |
| 5113124 | Programmable appliance controller A programmer for an appliance having a line power switch and a plurality of program switches sequentially actuated by a cyclic cam mechanism. The program switches are latched to the actuated condition and uplatched independently of the cyclic mechanism by... | 05/12/1992 |
| 5097105 | Device for controlling the power of a microwave oven Control device for microwave ovens comprising a timer whose movement (1) drives a periodic actuating mechanism of the actuator (2) of a switch (3), mounted in the electric supply circuit of the oven, as well as a selector (4) of operating modes manipulabl... | 03/17/1992 |
| 5025117 | Can operated timer with improved housing A u-shaped timer housing body has a pair of elongated legs, a closed end, an open end, and a pair of open sides. There are a plurality of electrical switches, each switch including a pair of contacts, one of which comprises a terminal-switch blade combina... | 06/18/1991 |
| 4983790 | Electromechanical programmer assembly An electromechanical programmer assembly for controlling electrically operated appliances having a rotatable cam drum operable upon motorized advancement to actuate and deactuate plural program switches for controlling appliance functions. A user actuated... | 01/08/1991 |
| 4965859 | Electromechanical timer with improved bussing retention An electromechanical timer includes a motor-driven cam, and electrical switches responsive to the cam supported in a housing. An array of rows and columns of electrical terminals are connected to the switches and extend from one end of the housing. First ... | 10/23/1990 |
| 4962288 | Timer with improved electrical bussing An electromechanical timer includes a motor-driven cam and electrical switches responsive to the cam supported in a housing. An array of rows and columns of electrical terminals are connected to the switches and extend from one end of the housing. First e... | 10/09/1990 |