Abstract: A theft resisting device for use as part of an electric watthour meter includes a moveable slide bar positioned in a housing within the base plate of the meter. The slide bar is normally retracted, but when unauthorized removal of the meter from its socket occurs, the bar extends thereby preventing reinstallation of the meter in the socket in any position. Locking means engages the slide bar to prevent retraction of the bar. An access aperture to the housing permits a tool to be inserted to reset the locking means and permit slide bar retraction.

Abstract: A watthour meter with a rotatable metering movement responsive to the flow of energy through the meter includes a gravity activatable contact or stop element to engage the metering movement when the meter is inverted for preventing deregistration of consumed energy. Latching means can lock the element in a position showing that the meter had been inverted.