Abstract: A dial gauge according to the present invention wherein moving ranges of a dial plate and a needle are determined to be within predetermined limits.In this dial gauge, the dial plate is interposed between an inner frame and an outer frame in a manner to be rotatable relative to either the inner frame or the outer frame, and a projection formed on the undersurface of this dial plate is positioned within a groove formed on the top face of an outer frame mounting portion of the inner frame to thereby control the dial plate in its moving range. On the other hand, a slot is formed in a gear for enlarging and transmitting a movement of a spindle in the circumferential direction of the gear and the forward end of a pawl affixed to the inner frame is loosely inserted into the slot to thereby restrict the needle in its turning to less than one turn.

Abstract: A linear scale type measuring device wherein an index scale mounted on a slider is opposed to a linear scale, the displacement of a movable member is imparted to said slider through connecting means and the relative displacement between the linear scale and the index scale is read by use of a light source and a receptor element both of which are provided on the slider, characterized in that said connecting means comprises a first engageable member provided at the forward end of a cantilever spring for biasing the slider toward the linear scale and a second engageable member engaging said first engageable member, and one of said first and second engageable members is formed into a projection or a recess provided with a tapered surface and the other is formed into a hole engageable with the tapered surface of said projection or cornered portion engageable with the tapered surface of said recess, said hole or the cornered portion being made of a ring-like portion which the forward portion of said cantilever spri