FR2536343A1 - ASSEMBLY SYSTEM AND METHOD FOR PRODUCING COMPASS FOR BLOCKING THE HEAD, QUICK AND FINE ADJUSTMENT, AND DIRECT READING BY ELECTRONIC DISPLAY OF BRANCH CLEARANCE - Google Patents

Abstract

THE INVENTION RELATES TO COMPASSES. THE USE OF PLASTIC REINFORCED WITH GLASS FIBERS OR CARBON ALLOWS TO QUICKLY REALIZE THE STRUCTURE OF THE COMPASS. THE HEAD OF THE COMPASS INCLUDES A SCREED 1 GROOVED ENCLOSING A KEY 3 EQUIPPED WITH TWO AXLES 4 AND 5, A PASSAGE HOLE 6 FOR A SCREW 11 ALLOWING THE BLOCKING OF SLICES 7 AND 8. THE SPACING OF THE BRANCHES CAN BE ADJUSTED BY A STEM CLAMP QUICKLY AND WITH PRECISION BY A NUT WITH SPHERICAL REACH SCREWED ON THE THREAD OF A ROD. A DIRECT READING SYSTEM BY ELECTRONIC DISPLAY OF THE MEASUREMENT OF THE DISPLAY OF THE TIP IS CARRIED OUT BY A SENSOR DETECTING ON A ROD OF THE MARKS. APPLICATIONS: DRAWING AND PLOTTING.

Description

The present invention relates to drawing or tracing compasses, their

  production method, an assembly system

  and branch locking, a fine adjustment system and a system

  A rapid adjustment of the spacing of the branches and a system of direct reading by electronic display of the measurement of the spacing of the tips O In the known prior art the compasses are

  assembled by the use of fasteners such as screws

  vets or other mechanical processes These means are long and

  The use of metal for the production of

  thrones the need for many machining The use of plastic material leads to the need for the addition of ribs

  bulky for the maintenance of rigidity.

  The compasses made according to the invention make it possible to

  These disadvantages In fact the assembly is made of

  easy and quick way by embedding A screw ensures simultaneous

  temporarily maintaining the assembly and blocking the branches

  of the compass A quick adjustment system and a system of

  thin gauge of the spacing of the branches can be added to the compass They consist of a minimal number of parts which reduces the manufacturing difficulties existing in similar known systems Compass parts made

  preferentially and without limitation by molding of

  In order to obtain the desired rigidity, the plastic material is reinforced with fibers preferably made of glass or carbon. A system for direct reading by electronic display of the measurement of the spacing of the tips is made by a sensor detecting

on a rule of landmarks -

  The features of the invention are apparent from the

  following detailed description and accompanying drawings given in

as an example.

  Fig 1 is an exploded view of the head of the compass -

  FIG. 2 is an overall view in section of the fine adjustment system of the gap. FIG. 3 is a cross-sectional view of the control system of FIG.

quick adjustment -

  Fig 4 is an overview of the quick adjustment system Figures 5 and 6 show the housing for the nut

  spherical range of the fine adjustment system.

  FIG. 7 represents the compass provided with its device

  electronic display and a fine adjustment system.

  As shown in Figure 1 the head of the compass

  comprises a screed (1) in which a rim is

  Nure (2) or insert the key (3) provided with the two axes (4 and 5) and a through hole (6) The two branches

  (7 and 8) are preferably and not limited to

  for two toothed sectors (9 and 10) allowing self-centering of the yoke The two branches are mounted on their hinge pins (4 and 5) and then the assembly is inserted into the yoke (1) A screw (11) to polygonal head embedded in a housing (10) of uan wing of the yoke, so as to prevent it from rotating through the other wing

  of the clevis by a hole <3) A nut (14) allows

  rage of the clevis blocking the branches in a chosen position. A system for fine adjustment of the opening of the compass is carried out as shown in FIGS. 5 and 6 by way of example by a knurled knob nut (15) having a spherical portion (16). A spherical housing (17) ) in relation

  with one of the branches of the compass (7) is equipped with both

  passing markings (18 and 19) to allow oscilla-

  The nut (15) is screwed onto the connected threaded rod (20)

  to the other branch to vary the distance of the compass.

  In another embodiment the sectieric housing is located in the longitudinal axis of the branch in its thickness. A system for quickly adjusting the opening of the compass shown in FIGS. 3 and 4 consists of a greenhouse rod (21)

  which blocks in the desired position the rod (20) in relation -

  with the other branch by plating on a puck (23)

  using the knurled nut (24).

  The device of direct reading of the measure of the

  The tips are shown in FIG. 7 by way of example.

  It is made by a rod (25) provided with marks which also serves to maintain the parallelism of the branches which are articulated The reading of the measurement of the spacing of the branches can be done directly or with the help of a vernier or a dial or any other known reading device but preferably by the use of a system -3 electronic reference display (26) A sensor (27) reads the marks carried on the rod (25) a locking device (28) allows the rapid setting up

of stem of different lengths.

  A fine trimming device is constituted by a knurled piece (29) having a threaded portion and secured in translation of the branch carrying the sensor A threaded tube

  (30) sliding on the rod (25) has a slot and a

  Tapered nut A knurled nut (31) due to its conical bearing

  pinches the tube on the stem and immobilises it

  The rotation of the knurled part (29) ensures the transla-

branch.

  Of course, the invention is not limited to the modes of

  represented, it is likely to

  its other variants accessible to those skilled in the art, without departing from the spirit of the invention We will not go out

  not particularly the scope of the invention by partially applying

  on a compass the manufacturing methods or systems to ensure the various functions described in

the present invention.

  Among the most interesting applications of the in-

  vention we can mention the use for drawing and

  tracing in schools, workshops and design offices.

-4 -

Claims (9)

  1 compass head assembly system characterized in that it consists of a yoke (1) in which is wedged a key (3) supporting two axes (4 and 5) on which are articulated the two branches (7 and 8)   2 Compass head assembly system according to the   claim 1 characterized in that the yoke is self-centering   by the end of the two branches (9 and 10) forming gear.   3 Locking device for the following compass branches   one of claims 1 and 2 characterized by the fact that   consists of a screw (11) held in rotation by its head embedded in a wing of the yoke passing through the clavett (3) passing between the two branches, crossing the other wing of the   screed on which comes to be pressed the nut which ensures the serage.   4 Fine adjustment system for compass opening   characterized in that the feed is effected by a nut (15) with   spherical body (16) in connection with a compass branch.   Fine adjustment system for compass opening   4, characterized in that the spherical range   that ti 6) of the nut is embedded in its spherical housing   female by elastic deformation.   6 Quick adjustment system for opening compass   characterized in that it includes a pierced stem greenhouse leaving no   a rod that is blocked by a washer pressed against the age by pulling a nut.   7 Compass characterized in that at least one piece   killing is made of plastic material reinforced with fibers   preferably constituted by glass or carbon.   8 Compass characterized by having a rod   equipped with a marker allowing the reading of the measurement of the spread - branches.   9 Compass characterized by the fact of a display system   electronic digital age allows the reading of the spacing points.   10 Compass characterized by the fact that it has a   end consisting of the use of a screw nut system   with a piece that can lock in position on a rod.