Device in pen form with means for measuring a length
First Claim
1. A measuring device comprising:
- a measuring head;
a movable body positioned in said measuring head, said movable body being contactable with a length to be measured, motion of said movable body being proportional to the length to be measured, said movable body being a solid of revolution supported rotatably about its axis of symmetry, said movable body being rollable along the length to be measured, said movable body including a central transparent portion;
electromagnetic radiation means for generation of electromagnetic radiation;
a first optical fiber conveying said electromagnetic radiation from said electromagnetic radiation means to said movable body;
a plurality of markings on said movable body, said plurality of markings modulating said electromagnetic radiation from said first optical fiber in relation to motion of said movable body along the length said modulated electromagnetic radiation containing information relating to a rotation of said movable body;
a second optical fiber conveying modulated electromagnetic radiation away from said movable body;
processing means receiving said modulated electromagnetic radiation from said second optical fiber and for determining a measurement of the length from said modulated electromagnetic radiation;
illumination means provided in said measuring head for conveying light radiation to said central transparent portion to illuminate the length to be measured.
2 Assignments
0 Petitions
Accused Products
Abstract
A measuring or determining device including a measuring head with a movable body designed to be placed in contact with the object on which the measurement or determination is to be executed. The device includes structure for the generation of electromagnetic radiation and conveying structure to convey the electromagnetic radiation to the movable body. The movable body has a plurality of markings which modulate the electromagnetic radiation in relation to movement of the movable body. Another conveying structure conveys the modulated electromagnetic radiation away from the movable body and to a processing unit which determines the length of the object being measured from the modulated electromagnetic radiation.
27 Citations
23 Claims
-
1. A measuring device comprising:
-
a measuring head; a movable body positioned in said measuring head, said movable body being contactable with a length to be measured, motion of said movable body being proportional to the length to be measured, said movable body being a solid of revolution supported rotatably about its axis of symmetry, said movable body being rollable along the length to be measured, said movable body including a central transparent portion; electromagnetic radiation means for generation of electromagnetic radiation; a first optical fiber conveying said electromagnetic radiation from said electromagnetic radiation means to said movable body; a plurality of markings on said movable body, said plurality of markings modulating said electromagnetic radiation from said first optical fiber in relation to motion of said movable body along the length said modulated electromagnetic radiation containing information relating to a rotation of said movable body; a second optical fiber conveying modulated electromagnetic radiation away from said movable body; processing means receiving said modulated electromagnetic radiation from said second optical fiber and for determining a measurement of the length from said modulated electromagnetic radiation; illumination means provided in said measuring head for conveying light radiation to said central transparent portion to illuminate the length to be measured. - View Dependent Claims (2, 3, 8, 9, 10, 11, 12, 13, 15, 17, 19)
-
-
4. Measuring device, comprising:
-
a measuring head with a fixed portion and an angularly movable portion movable about a measuring head axis; a movable body positioned in said angularly movable portion of said measuring head, said movable body being rotatable about a movable body axis, said movable body axis being substantially orthogonal to said measuring head axis, said movable body being contactable with a length to be measured, motion of said movable body being proportional to a length to be measured; electromagnetic radiation transmitter means in said fixed portion for transmitting electromagnetic radiation coaxially with said measuring head axis; a first optical fiber positioned in said angularly movable portion and for conveying said electromagnetic radiation from said electromagnetic radiation transmitter means to said movable body, an input end of said first optical fiber being coaxial with said measuring head axis; a plurality of markings on said movable body, said plurality of markings modulating said electromagnetic radiation from said first optical fiber in relation to motion of said movable body along the length; a plurality of second optical fibers conveying modulated electromagnetic radiation away from said movable body, said plurality of second optical fibers having output ends positioned around said input end of said first optical fiber; receiver means positioned in said fixed portion for receiving said modulated electromagnetic radiation from said plurality of second optical fibers; processing means receiving said modulated electromagnetic radiation from said plurality of receiver means and for determining a measurement of the length from said modulated electromagnetic radiation. - View Dependent Claims (5, 6, 7, 14, 16, 18, 20, 21)
-
-
22. Measuring device, comprising:
-
a measuring head with a fixed portion and an angularly movable portion movable about a measuring head axis; a movable body positioned in said angularly movable portion of said measuring head, said movable body being rotatable about a movable body axis, said movable body axis being substantially orthogonal to said measuring head axis, said movable body being contactable with a length to be measured, motion of said movable body being proportional to a length to be measured; electromagnetic radiation transmitter means in said fixed portion for transmitting electromagnetic radiation coaxially with said measuring head axis; a first optical fiber positioned in said angularly movable portion and for conveying said electromagnetic radiation from said electromagnetic radiation transmitter means to said movable body, an input end of said first optical fiber being coaxial with said measuring head axis; a plurality of markings on said movable body, said plurality of markings modulating said electromagnetic radiation from said first optical fiber in relation to motion of said movable body along the length; a plurality of second optical fibers positioned in said angularly movable portion and conveying modulated electromagnetic radiation away from said movable body, said plurality of second optical fibers having output ends positioned around said input end of said first optical fiber, said output ends of said plurality of second optical fibers rotating about said measuring head axis with respect to said fixed portion when said angularly movable portion rotates about said measuring head axis; a plurality of receiver means positioned in said fixed portion and arranged around said transmitter means for receiving said modulated electromagnetic radiation from said plurality of second optical fibers; processing means receiving said modulated electromagnetic radiation from said plurality of receiver means and for determining a measurement of the length from said modulated electromagnetic radiation. - View Dependent Claims (23)
-
Specification