Photochromic time delay unit专利检索-电致变色器件电子零件及设备专利检索查询-专利查询网

Photochromic time delay unit

阅读：716发布：2021-12-12

专利汇可以提供Photochromic time delay unit专利检索，专利查询，专利分析的服务。并且In preferred form, a time delay circuit including a light dependent variable resistance device having a housing divided into two compartments. A light source is located in one of the compartments and a light dependent resistor having a high dark resistance and a lower resistance when exposed to light is located in the other compartment. A photochromic lens is interposed between the light and the light dependent resistor to produce a timed control of the resistance value of the device. The device is connected in circuit with an electrical load by means of a single switch and a network that will simultaneously energize the light, the light dependent resistor, and load.，下面是Photochromic time delay unit专利的具体信息内容。

权利要求

1. A photochromic time delay assembly comprising: an opaque housing including first and second compartments, means for closing said compartments against entry of light from outside said housing, a lamp in one of said compartments, a photochromic lens separating said compartments including a layer of photochromic material thereon opeRative to change from a transparent state to an opaque state when exposed to light rays from said lamp, a light dependent resistor having a low resistance when exposed to a high intensity light source and a high resistance when exposed to a low intensity light source, said light dependent resistor being exposed to light from said energized lamp following passage thereof through said photochromic lens, an energization circuit including a switch, said light dependent resistor and an electrically energizable load, said switch connecting said load and light dependent resistor across a power source, means including said switch for simultaneously energizing said lamp when said load is connected across the power source, said light dependent resistor having a low resistance when the switch is initially closed to produce a high voltage across the load, said lamp and lens responding to energization of the load by said switch to cause said lens to become more opaque to produce a time controlled reduction of light impinging on said light dependent resistor to increase the resistance of said resistor to produce a reduced voltage across the load following a time delay.

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