CN2203440Y

CN2203440Y - Gem angle ruler

Info

Publication number: CN2203440Y
Application number: CN 94218480
Authority: CN
Inventors: 张明
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-08-23
Filing date: 1994-08-23
Publication date: 1995-07-12
Anticipated expiration: 2004-08-23

Abstract

The utility model relates to a gem angle ruler, which belongs to a measurer for measuring angles. The gem angle ruler is used for measuring the angle between a gem and an abrasive disk; the gem and the abrasive disk are adhered to a sticking rod and clamped in an octagonal hand. The gem angle ruler has the advantage of fast and accurate measurement and can directly read the facet angle value of the gem; the gem angle ruler is a rectangular angle plate; one side of the surface of the rectangular angle plate is carved with an arc of a quarter of a circle; the circular arc is carved with a 0-90 DEC graduation line; the connecting line between a 0 DEC graduation line and the circular center of the circular arc is parallel to the bottom line of a rectangular angle plate; the circular center of the circular arc is provided with a pointer; the pointer is provided with a connecting piece which is in a right angle with the pointer; the front end of the connecting plate is a V-shaped groove; the centerline of the V-shaped groove is in a right angle with the centerline of the pointer.

Description

Gem angle ruler

The utility model belongs to the measurer that takes measurement of an angle, particularly measure be bonded on the bar and be held on jewel in the anistree hand and mill between the measurer of angle.

During processing gem, need carve the mill jewel, jewel is have the polyhedron of certain angle with grinding machine.Many at present the quarter with anistree hand (7) processing ground jewel.Add man-hour, all directions calibration (8) frame of anistree hand is on the pallet (9) of grinding machine, and the sticking bar (10) that is stained with the jewel blank is clamped on the spring chuck (11) of anistree hand.When the mill (13) of jewel blank (12) contact grinding machine began to carve mill, the angle that forms between sticking bar and the mill surface was the α angle.This α angle is exactly the angle (see figure 1) of measuring usually.

At present, gem processing person's protractor of all being to use the student to use is estimated this angle.Because measured object each several part reasons in structure, do not allow protractor is close to tested position, shown in measuring error bigger.And the angle of gem processing technical information regulation is the complementary angle at this angle, also need be after the measurement through converting, and this makes troubles to the gauger.

The purpose of this utility model is the jewel bevel protractor of a kind of pointer-type of design, the facet angle that can directly read tested jewel from the pointer.

The utility model is to realize (referring to Fig. 2) like this.

The jewel bevel protractor is a rectangle angle board (1), it is characterized in that plate face one side is carved with the camber line that arc length is a quadrant (2), and circular arc line is carved with 0-90 ° of reticule, and 0 degree reticule is parallel with rectangle angle board base with the line in the circular arc center of circle; At the circular arc circle centre position pointer (5) is housed, is connected with angle board by little axle (3); Also be provided with on the pointer one with the rectangular brace of pointer (4), the front end of brace is a V-type groove (6), the center line of V-type groove and pointer center line meet at right angles, the summit at right angle is dropped on the little spool axle center.When V-type groove center line was vertical with the angle board base, pointer was designated as 0 °.Pointer, brace and V-type groove are one.

Reticule is groove of every degree, and by 5 °, the 10 ° long and short different grooves of branch in interval.

The length and width ratio of rectangle angle board is 4 to 3.

The needle point of pointer refers on scale mark.

Using method (referring to Fig. 3): the base of angle board is placed on the mill, the sticking bar of anistree hand is snapped in the V-type groove, be adjacent to, the indicated angle value of pointer this moment is exactly the facet angle of jewel.As regulate pallet height, can record the different facet angle value of jewel.

The utility model is measured the facet angle value of jewel, quick and precisely.

Fig. 1 gem processing synoptic diagram.

Fig. 2 the utility model structural representation.

Fig. 3 user mode synoptic diagram.

Claims

1, the jewel bevel protractor is a rectangle angle board (1), it is characterized in that plate face one side is carved with the camber line that arc length is a quadrant (2), and circular arc line is carved with 0-90 ° of reticule, and 0 degree reticule is parallel with rectangle angle board base with the line in the circular arc center of circle; At the circular arc circle centre position pointer (5) is housed, is connected with angle board by little axle (3); Also be provided with on the pointer one with the rectangular brace of pointer (4), the front end of brace is a V-type groove (6), the center line of V-type groove and pointer center line meet at right angles, the summit at right angle is dropped on the little spool axle center.

2, jewel bevel protractor according to claim 1 is characterized in that reticule is groove of every degree, and by 5 °, the 10 ° long and short different grooves of branch.

3, jewel bevel protractor according to claim 1 is characterized in that the length and width ratio of rectangle angle board is 4 to 3.