子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 121 | Precautionary timer for kitchen range surface elements | US95317 | 1998-06-10 | US5942816A | 1999-08-24 | Jack J. Carter |
| A precautionary timer for installation in a kitchen range, as a replacement of a plug-type fuse protecting one of the heating elements of the kitchen range. In a first aspect of the invention, the precautionary timer comprises a threaded fuse stock having first and second electrically conductive terminals set apart from one another, and conductive segments mounted inside the threaded fuse stock and connected to the first and second terminals. A timing unit comprising a low voltage solid state timer and an electronic switch is also mounted inside the threaded fuse stock. The solid state timer is powered by a current transformer sampling power from the current flowing in one of the conductive segments. The semiconductor switch is connected in series with the conductive segments and the first and second terminals, for selectively electrically connecting and disconnecting the first and second terminals to and from one another. | ||||||
| 122 | Light switch cover plate with mechanical timer mechanism | US837254 | 1997-03-26 | US5828018A | 1998-10-27 | Edward M. Cooper |
| A light switch cover plate with a mechanical timer mechanism that includes a linear rack member for engaging the existing light switch actuator and that includes a cover plate member defining a timer mechanism cavity wherein the linear rack member is slidably installed within the timer mechanism cavity and guided along a predetermined path between a fully upward position and a fully downward position by an upper rack guide and a left and right lower rack guide, the linear rack member being biased toward the fully downward position by a helical spring attached between the linear rack member and the cover plate member, the linear rack having gear teeth formed along a side edge thereof in meshing relationship with a spring loaded mechanical drive mechanism including a spring drive assembly, a spring drive gear, a reduction gear assembly and an anchor escapement gear, the spring loaded mechanical drive mechanism providing a resistance against movement of the linear rack toward the fully downward position under the tensional force of the helical spring in a manner such that a predetermined period of time is required for the linear rack to move from the fully upward position to the fully downward position. | ||||||
| 123 | Touch switch arrangement for a heating cooking appliance | US511330 | 1990-04-19 | US5097113A | 1992-03-17 | Michishige Aoyama |
| A heating cooking appliance includes a heater for the cooking, a switch generating an operation signal while being touched or depressed with a finger or the like, and a microcomputer for controlling the heater so that energization of the heater is initiated in the case where the operation signal generated by the switch is continuously input into the microcomputer for a predetermined period of time. The heater is not energized only when the switch is touched by accident or mistake. When a user depresses the switch for the predetermined period of time with the intention of initiating the cooking, the heater is energized. | ||||||
| 124 | Electrical actuator with means for preventing dither at a limit switch | US677937 | 1991-04-01 | US5081405A | 1992-01-14 | Marvin D. Nelson |
| The tendency of a motor-driven actuator driving against a dynamic (non-frictional) load to return upon reaching the limit switch sufficiently to again close the limit switch and create a persistent oscillation at the limit position can be prevented by placing a positive temperature coefficient thermistor across the limit switch involved. Such loads typically arise in actuators having spring-driven return capability, and can also arise when positioning air dampers and other loads where the actuator force is opposed by a spring or gravity. | ||||||
| 125 | Delayed action switch actuator | US173218 | 1988-03-25 | US4794213A | 1988-12-27 | D. Gregory Wood |
| A delayed action switch actuator includes a spring attached to one corner of a face plate, a suction cup and a ring-like toggle engaging member, sized to surround the toggle passing through the face plate, connecting the spring to the suction cup. The spring is sized to be in tension when the toggle-engaging member is in a toggle-engaging position. The suction cup is affixable to a roughened surface area on the face plate. The suction cup forms an imperfect seal with the roughened surface area, which results in the suction cup releasing after a period of time, such as a minute or two. The toggle is located between the point of attachment of the spring on one side of the face plate and the roughened area on the other side of the face plate. When the suction cup releases, the spring, which is in tension, pulls on the toggle-engaging member which subsequently trips the toggle. | ||||||
| 126 | Delayed actuator with visco-elastic timer | US54415 | 1987-05-26 | US4791251A | 1988-12-13 | Robert E. Carter; Porter Stone |
| A delayed actuator mechanism with visco-elastic timer is provided including a support section and an actuator section mounted to the support section. A compression spring biases the actuator section in a first state and permits the actuator section to be selectively switched to a second state. In that state a cocked torsion spring urges a detent carried by the actuator into engagement with a shoulder of the support section to restrain the actuator section in the second state. A visco-elastic delay mechanism gradually relaxes the torsion spring until the compression spring overcomes the detent shoulder restraint to abruptly switch the actuator section to the first state. | ||||||
| 127 | Signal device | US635825 | 1984-07-30 | US4669990A | 1987-06-02 | Kevin McDermott |
| The battery operated signal device employs a gravity operated switching system with a time delay. The time delay is effected in one embodiment by having a weighted element move through a tortuous path when the signal device is thrown into the water before activating the contacts of a switch to energize a circuit. In other embodiments, the time delay is effected by pendular members which pivot when the signal device is inverted to either actuate a switch or to permit passage of a ball to actuate the switch. The time delay extends the time required to turn on the light so that forces developed on the light by the pitching, plunging and rolling action of a vessel do not result in intermittent unwanted operation. | ||||||
| 128 | Time delayed shut-down circuit for recirculation pump | US450300 | 1974-03-12 | US3963375A | 1976-06-15 | George C. Curtis |
| A circuit is provided for shutting off the motor of an intermittently activated, electrically powered fluid recirculation pump to prevent the pump motor from burning out its windings or bearings. A power control relay is energized to activate the pump motor for a predetermined period of time, allowing the pump to reach steady state flow condition, after which a time delay relay opens and current flows to the power control relay through a pressure switch. The pressure switch opens to shut-off the recirculation pump motor whenever the pump discharge pressure falls below a predetermined minimum. | ||||||
| 129 | Keyboard apparatus having means to control duration of actuation of circuit | US46598465 | 1965-06-22 | US3270853A | 1966-09-06 | HEINZ GERJETS; HANS ELSNER; SIEGFRIED WESSELHOFT |
| 130 | Apparatus for opening and closing an electrical circuit | US57958456 | 1956-04-20 | US2881359A | 1959-04-07 | BERNARD RASOF; JACOBS EARL D |
| 131 | Electric switching devices | US48800255 | 1955-02-02 | US2863021A | 1958-12-02 | NORMAN GREEN HARRY |
| 132 | Periodic mescury switch mechanism | US2602865D | US2602865A | 1952-07-08 | ||
| 133 | Timing apparatus | US65166346 | 1946-03-02 | US2437168A | 1948-03-02 | MARIHART LEO A |
| 134 | Electric switch | US2322663D | US2322663A | 1943-06-22 | ||
| 135 | Circuit controller | US2187795D | US2187795A | 1940-01-23 | ||
| 136 | Geared limit switch | US1590471D | US1590471A | 1926-06-29 | ||
| 137 | Geseilschaft | US1509026D | US1509026A | 1924-09-16 | ||
| 138 | Time-controlled electric switch. | US10313216 | 1916-06-12 | US1209273A | 1916-12-19 | FAYER CHARLES |
| 139 | Automatic circuit maker and breaker. | US1914843195 | 1914-06-05 | US1158729A | 1915-11-02 | SCHOLL MAX |
| 140 | Pneumatic time-switch. | US257615 | 1915-01-16 | US1139066A | 1915-05-11 | PARSONS GEORGE H |
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