Abstract: This invention is a unique method and apparatus for securing doors, windows, and the like, from unwarranted entry so that limited opening of the door, or the like, can be accomplished. The invention further provides for the emergency release of the securement device by a person from the inside of the locked room. Methods and apparatus for adapting and installing the securement device is unique and the unwarranted entry is further accomplished by means of unique design for preventing jarring or vibrating the securement device out of position of proper operation. Additional features include the allowing of entry into the room from the outside authorized persons by means of undetectable access features.

Abstract: This invention is a unique method and apparatus for illuminating carpenter's and mechanic's levels so that true readings may be obtained and the like, in shaded areas or under poor lighting conditions. The method and apparatus are characterized by the insertion of an illuminating device into the level in such manner that illumination travels through the leveling medium eliminating shadows normally caused. The invention includes the method for insertion within existing levels.