Dial gauge
First Claim
1. A one turn type dial gauge comprising:
- a casing including an inner frame for axially displaceably supporting a spindle having at one end thereof a measuring element and an outer frame rotatably coupled onto said inner frame;
a dial plate interposed between said inner frame and said outer frame in a manner to be rotatable relative to said inner frame and said outer frame, brought into pressing contact with said outer frame through a biasing means and partially provided thereon with an ungraduated portion;
a means for controlling the turning range of said dial plate relative to said inner frame, including a groove formed on one of said dial plate and said inner frame over a predetermined range in the turning direction of said dial plate and a projection formed on the other of said dial plate and said inner frame and slidably disposed in said groove;
a gear mechanism for converting an axial displacement of said spindle into a rotary motion, including a gear supported coaxially with a cam member driven by said spindle and a pinion engaged with said gear and provided at one end thereof with a needle;
a control means for restricting a range of turning of said needle to less than one turn, including a slot provided in said gear over a predetermined range in the circumferential direction of said gear and a pawl, the forward end of which is loosely inserted into said slot and the proximal end of which is solidly secured to a portion of said inner frame;
a mechanism for preventing rotation of said spindle, including a pin projected from said spindle in said inner frame and a guide member for guiding said pin only in the axial direction of said spindle; and
a spring for biasing said spindle in a direction causing said spindle to project progressively farther from said inner frame.
1 Assignment
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Accused Products
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.
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Citations
5 Claims
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1. A one turn type dial gauge comprising:
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a casing including an inner frame for axially displaceably supporting a spindle having at one end thereof a measuring element and an outer frame rotatably coupled onto said inner frame; a dial plate interposed between said inner frame and said outer frame in a manner to be rotatable relative to said inner frame and said outer frame, brought into pressing contact with said outer frame through a biasing means and partially provided thereon with an ungraduated portion; a means for controlling the turning range of said dial plate relative to said inner frame, including a groove formed on one of said dial plate and said inner frame over a predetermined range in the turning direction of said dial plate and a projection formed on the other of said dial plate and said inner frame and slidably disposed in said groove; a gear mechanism for converting an axial displacement of said spindle into a rotary motion, including a gear supported coaxially with a cam member driven by said spindle and a pinion engaged with said gear and provided at one end thereof with a needle; a control means for restricting a range of turning of said needle to less than one turn, including a slot provided in said gear over a predetermined range in the circumferential direction of said gear and a pawl, the forward end of which is loosely inserted into said slot and the proximal end of which is solidly secured to a portion of said inner frame; a mechanism for preventing rotation of said spindle, including a pin projected from said spindle in said inner frame and a guide member for guiding said pin only in the axial direction of said spindle; and a spring for biasing said spindle in a direction causing said spindle to project progressively farther from said inner frame. - View Dependent Claims (2, 3, 4, 5)
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Specification