公开(公告)号：US5305975A

公开(公告)日：1994-04-26

申请号：US972691

申请日：1992-11-06

Applicant: Charles L. Douglass ,  Bruce A. Mertz

Inventor： Charles L. Douglass ,  Bruce A. Mertz

IPC: B61L5/12 ,  B61L23/06

CPC classification number: B61L23/06 ,  B61L5/12

Abstract: An apparatus for representing the state of a condition, the condition having a true state and a false state, the apparatus comprising an indicator having a recognizable feature indicative of the true state of the condition, a cover for covering the indicator and a support for removably supporting the indicator and cover on a surface. The apparatus includes a device for moving the indicator and the cover relative to each other such that the true state of the condition is represented by the indicator being uncovered and the false state of the condition is represented by the indicator being covered.

Abstract translation: 一种用于表示状态的状态的装置，具有真实状态和假状态的状态，该装置包括具有指示状态的真实状态的可识别特征的指示器，用于覆盖指示器的盖和可移除的支撑 支撑指示器和表面上的盖子。 该装置包括用于使指示器和盖相对于彼此移动的装置，使得条件的真实状态由指示器未被覆盖并且状态的假状态由被覆盖的指示符表示。