CN2034127U

CN2034127U - Uniform meter

Info

Publication number: CN2034127U
Application number: CN 88209950
Authority: CN
Inventors: 陈海华; 陈伯岳
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-08-19
Filing date: 1988-08-19
Publication date: 1989-03-15

Abstract

The utility model relates to an equant meter which belongs to the geometric drawing tool. The utility model is formed according to the theory that the circumference ratio of the two circles equals to the radius ratio of the two circles, which is 2 piR (1) /2 piR (2) =R (1) /R (2). The utility model is composed of a main scale, a fixed (circle) center pin and an equant head base, and has the advantages of novel and simple structure, convenient operation, low cost and high equant accuracy. The utility model is a good tool for teaching, fine arts, buildings and technical drawing.

Description

Uniform meter

The five equilibrium instrument is a kind of Geometric figure drawing instrument.It is according to two round weeks than equaling its radius ratio, i.e. the principle of (2 π R1)/(2 π R2)=(R1)/(R2) designs.

Present drawing instrument yet there are no the correct Equal round of five equilibrium instrument energy, any angle and draws positive n limit shape, and the n five equilibrium is carried out at any angle, and particularly working as n is 3,5,7,11,13 ... when the odd number, be difficult to correct five equilibrium.

Task of the present utility model provides a kind of five equilibrium instrument, and it is by main scale, fixed (circle) heart pin and wait parted hair to form, and can solve above-mentioned deficiency, can paint any just n limit shape to circle, any angle n five equilibrium.

Be further described below in conjunction with accompanying drawing and enforcement:

Fig. 1 is a schematic diagram of the present utility model;

Fig. 2 is the A of Fig. 1---A face side view;

(1) sleeve among the figure, (2) spring, (3) pen core, (4) gear shaft, (5) two pointers, (6), (7) gear, (8), (9) screw, (10) bolt, (11) nut, (12) stainless steel (or other materials make bar chi) main scale, (13) vernier, (14) steel ball, base such as (15) parted hair, (16) packing ring, (17) gear shaft.

As Fig. 1, shown in 2: fluting in the middle of stainless steel (or other materials make the bar chi) main scale (12), vernier (13) can be moved therein make to regulate radius, steel ball (14) on the vernier (13) is made fixed (circle) heart pin and is used, vernier (13) is actively socketed in the groove of main scale (12) with bolt (10) and nut (11) with steel ball (14), main scale (12) lower end is for waiting separately, two orthogonal radiuses be housed be 1 centimetre gear (6) on it, (7), be carved with 360 degree scales on the gear (6) and have two pointers (5) to make indicating dial, available other of gear (7) are taken turns or with the gear of radius, be contained in the sleeve (1) Deng also being furnished with one-pen (3) on separately, there is spring (2) to head between pen (3) and sleeve (1), waits and be contained in base (15) screw (8) separately, (9) be fixed on the main scale (12).

As regulating radius and fixed (circle) heart pin usefulness, main scale (or other materials make bar chi) (12) is radius with vernier (13) and steel ball (14), gear (7) as Equal round around great circle rotate etc. branch devices such as minute wheel formation; Be the five equilibrium indicating device with two pointers (5) any angle that forms and any angle that band indicating dial gear (6) is constituted.

Instrument such as branch such as this grade is painted positive n limit shape and is achieved in that circle, any angle n five equilibrium

1. to justifying several five equilibriums and painting positive limit shape, R1=1 centimetre of the radius (roundlet) of vertical gear, get R2=n centimetre, move fixed (circle) heart pin, paint a great circle, roundlet (gear) is to change the n circle on n centimetre the great circle at R2, and the starting point of every circle is put on, can obtain n point, this point is round n Along ent; Link adjacent point, promptly obtain positive n limit shape;

2. any angle n five equilibrium, principle is the same, rotate pointer, make two pin angles equal any angle, get R=n centimetre, summit with the angle is the center of circle, the one side at angle is starting point (pointer refers to locate in " 0 "), draws the another side of circular arc to the angle then, can obtain n Along ent, link angular vertex and Along ent, the n five equilibrium can be carried out in the angle.

Claims

1, a kind of Geometric figure drawing instrument--five equilibrium instrument, by main scale (12), fixed (circle) heart pin (13) and etc. parted hair base (15) composition, it is characterized in that having groove in the middle of the main scale (or bar chi) (12), two orthogonal radiuses be housed be 1 centimetre gear (6) on the parted hair bases (15) such as lower end, (7) and one be contained in the pen core (3) that sleeve (1) has spring (2) to head on, be carved with 360 degree scales on the gear (6) and have two pointers (5) to make indicating dial, with main scale (or bar chi) (12) is radius, vernier (13) is used for regulating fixed (circle) heart pin of radius and steel ball (14), reach gear (7) and make the branch devices such as formation such as minute wheel such as grade that Equal round rotates around great circle, it is the five equilibrium indicating device that said two pointers (5) form any angle that indicating dial is constituted on any angle and the gear (6).

2, by the described five equilibrium instrument of claim 1, it is characterized in that main scale (12) is the bar chi that stainless steel or other materials are made.

3,, it is characterized in that available other of gear (7) are taken turns or with the gear of radius by the described five equilibrium instrument of claim 1.