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1. 发明授权

US3958158A Head 失效
标题翻译：头
公开(公告)号：US3958158A
公开(公告)日：1976-05-18
申请号：US556845
申请日：1975-03-10
申请人： Larry K. Dart
发明人： Larry K. Dart
IPC分类号： E03D9/10 , H03K3/352 , H03K17/292 , E03D9/00
CPC分类号： E03D9/10 , H03K17/292 , H03K3/352 , Y10S4/03
摘要： A control circuit for the motor of an electric marine toilet which, effectively, causes the toilet to flush. A conventional D.C. source of potential is employed with a conventional marine toilet including a motor, a pump driven by the motor and a macerator driven by the motor. The lid of the toilet operates a normally open switch. An advantage of the invention is that the lid-operated switch prevents injury to the operator. Moreover, the lid-operated switch provides a motor control override. That is, the motor can be turned off whenever the lid is lifted. A control circuit is provided between the source and the motor to control the motor, the lid operating, for example, by a magnet, a reed switch in the control circuit. The flush cycle may extend over any period. However, a three-second flush cycle is typical. The control circuit includes a momentary contact push button to operate the motor for a three-second interval timed by the control circuit. If the push button is held down for more than three seconds, there is a timing override which causes a flushing action that continues indefinitely until the push button is no longer held down. The structure disclosed has several advantages, one of which is that it is not, in the hazardous location on board a small boat, subject to breakage or corrosion. Further, its useful life far exceeds prior control devices for timing the flush cycle of an electric marine toilet. The structure disclosed also operates within small timing tolerances, and the timing thereof is independent of the D.C. input voltage magnitude impressed thereupon. Still further, the control circuit disclosed has an extremely small leakage current and power loss when the push button is not depressed. For example, the total leakage current may be 50 microamperes through a silicon controlled rectifier T1C45. This current may cause a power loss through a relay coil, the said silicon controlled rectifier and a resistor, all being connected in series, where the resistor may have a resistance of 0 ohms, 40 ohms or 75 ohms. If the lid is raised, there is no leakage current and there is no power loss. The timing is accomplished by applying a negative spike at an appropriate instant in time to the anode of the silicon controlled rectifier.

2. 发明授权

US4124880A Rotating signal light 失效
标题翻译：旋转信号灯
公开(公告)号：US4124880A
公开(公告)日：1978-11-07
申请号：US695305
申请日：1976-06-11
申请人： Larry K. Dart , Richard L. Stalder
发明人： Larry K. Dart , Richard L. Stalder
IPC分类号： B60Q1/26 , F21M7/00
CPC分类号： B60Q1/2611
摘要： A rotating signal light for emergency vehicles in which a plastic lamp holder is mounted on a vertically disposed rotatable shaft. Upper and lower contact plates are mounted on the top and bottom of the lamp holder. The contact plates have spring contact fingers which engage the terminals on the lamps mounted on the holder. The bottom plate also constitutes a slip ring which is engaged by a brush mounted on the support for the shaft. A pushnut mounted on the top of the drive shaft has a frictional engagement with the upper contact plate for driving the plate and, hence, the lamp holder. The lamp holder has a symmetrical notched configuration allowing two of such holders to be mated, one inverted and rotated 90.degree. relative to the other, so that the holder assembly may mount four lamps.
摘要翻译：用于紧急车辆的旋转信号灯，其中塑料灯座安装在垂直设置的旋转轴上。上下接触板安装在灯座的顶部和底部。接触板具有弹簧接触指状物，其接合安装在保持器上的灯上的端子。底板还构成滑动环，其由安装在用于轴的支撑件上的刷子接合。安装在驱动轴顶部的推杆与上接触板摩擦接合，用于驱动板，因此与灯座相接。灯座具有对称的凹口构造，允许两个这样的保持器相互配合，一个倒置并相对于另一个旋转90度，使得保持器组件可以安装四个灯。

3. 外观设计

USD254513S Hand held spotlight 失效
公开(公告)号：USD254513S
公开(公告)日：1980-03-18
申请号：US890700
申请日：1978-03-20
申请人： Larry K. Dart
设计人： Larry K. Dart

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