FR2483599A1 - TAPE FOR MEASURING LENGTHS - Google Patents

Abstract

MEASURING TAPE EQUIPPED, AT ONE OF ITS ENDS, WITH A PREHENSION RING AND A FLAP-DOWN HEEL, IN WHICH THE TAPE PROPERLY SAID IS ATTACHED TO THE PREHENSION RING BY A TRUNK OF THE SAME LOCATED IN THE PLAN OF THE RIBBON AND IN WHICH THE FOLDING HEEL IS ARTICULATED TO THE GRIP RING AND CAN PIVOT, AROUND AN AXIS PERPENDICULAR TO THE LONGITUDINAL DIRECTION OF THE RIBBON, AND CONTAINED IN THE EXTENSION OF THE PLAN OF THE RIBBON, SO TO COME OCCUPER AN ANGULAR POSITION PERPENDICULAR TO THE PLANE OF THE RIBBON, THIS HEEL, IN FOLDED POSITION AGAINST THE GRIP RING, PRACTICALLY NO OBLIGING ACCESS TO THE OPENING OF THE GRIP RING. THE FOLDING HEEL 14 IS MADE OF A U-CURVED PLANNING MATERIAL OF WHICH THE SURFACE PARTS 26 SHAPED BY THE U-STUDS 24 ARE PERPENDICULAR TO THE SWIVEL AXIS 22 OF THE FOLDING HEEL AND RECEIVES THIS SWIVEL AXIS 22.

Description

The invention relates to a tape for measuring lengths which is provided with

  one of its ends, a gripping ring and a folding heel, the gripping ring being attached to the ribbon by a ring section which is in the plane of the ribbon, and the folding heel. being articulated to the gripping ring and pivotable

  around an axis perpendicular to the longitudinal direction

  dinal ribbon and being in the extension of the ribbon plane so as to occupy an angular position perpendicular to the ribbon plane, the opening of the gripping ring being very accessible when the

  heel is folded against the grip ring.

  So long objects, such as tree trunks, can be measured by a single person the measuring tapes ordinarily used in

  this end are equipped with a heel that is mounted on the

  tie-off so that in the raised state the face

  inside of the heel coincides with the zero point of the

  measuring tape. To make a measurement we fix the end of the tape using the heel that hangs behind an edge of the object to be measured. So that the heel does not slip it is provided with some points that sink into the wood when you pull on the tape. The operator can then release the head of the ribbon, move along the object to be measured while unwinding ribbon (the traction exerted has the effect, there

  still, prevent the heel from slipping) and read, at the

  opposite, the length of the object. When releasing the pull on the ribbon the heel drops from the position where it was applied so that the measuring tape can

  to be rolled up on the spot and that we can proceed to a new

measure.

  In the measuring tape that was mentioned at the beginning (described in US Patent No. 1,726,960), the opening of the ring is free when the heel is folded against the ring, such that so that the user can pass a finger through the opening of the gripping ring to be able to manipulate as

  the free end of the measuring tape is suitable. The Your-

  This foldable measuring tape has the shape of an "H" whose plane, in the folded position, is parallel to the duruban plane. In the direction of the load of the folding heel in the separated position the resisting torque of the uprights is however very small so

  that the thickness of the material used for the

  one foldable must be relatively large. Certainly the cross-over "H" reinforces the folding heel. But this reinforcement is much too weak to increase the resistant torque. It is also necessary that the crossbar is sufficiently close to the pivot axis of the folding heel, which axis passes through the uprights, so as not to reduce too much the opening of the gripping ring, otherwise or the ring itself must be planned for very large

  size, or the opening of the ring that remains when

  that the heel is folded down is too small to be able to

  to have a relatively large finger. -

  - So we had to find - that was

  the technical problem addressed by the

  deresse - an advanced measurement tape of the type

  above that can be manufactured by simple means and whose heel has a relatively high rigidity in the tensile direction of the measuring tape without it being less easy to seize the gripping ring by the opening when the heel is folded against it and the folding heel with a weak

wall thickness.

  The solution that the present invention brings to this technical problem lies in the fact that the folding heel is made of a planiform material curved with

  to form a U whose amounts are perpendicular

  to the pivot axis of the folding heel and receives

this pivot axis.

  This solution allows to use a very thin material for making the folding heel because the small side of the upright heel uprights is

  in the tensile direction of the ribbon and that the length

  The cutter in the direction of traction is much greater than the thickness of the material. In the calculation of the resisting torque of the cross section this large dimension however intervenes at the power 3 so that the folding heel is extremely stable in the direction of traction-; on the other hand, in the perpendicular direction, it has dimensions - small as the opening by which the grasping ring is grasped is not modified at all - when the heel is folded down

against the grasping ring.

  In an advantageous embodiment, the axis of

  pivoting of the folding heel crosses the section

  the gripping ring which is opposed to the section through which the gripping ring is attached to the tape so that the amounts are outside the ring of

gripping.

  For the zero of the measuring tape to be formed

  the surface portion of the cross-bar of the folding heel

  U-shaped when this heel is in the folded position against the gripping ring, and by the narrow sides, turned towards the ribbon, amounts of the folding heel when it is raised from an angle of 9o0C, the distance between the l pivot axis of the folding heel and the surface portion of the cross member opposite to the pivot axis of the folding heel is equal to the normal distance between the pivot axis of the heel -rabattable and the narrow side of the uprights which is rotated to the ribbon and to the ring

  grip, is perpendicular to the surface of the

  versc and ensures contact. For the narrow sides of the heel pillars, sides that ensure contact,

  , 'are well associated with the object whose length one wishes to measure.

  they bear, in their longitudinal direction, a hollow or several indentations or recesses drawn in such a way that there are sharp projections or peaks

between two successive hollows.

  Another advantage of the solution according to the invention is that the present folding heel can be manufactured in a simple way consisting of cutting

  with a punch - in a pliant material, the

  turn of the folding heel in question, then to give it

  by folding the U-shape. Drilling the holes through the

  what the pivot axis should go through can be done at the same time as the die cut. Similarly,

  mentioned above can be de-

cut on the edge.

  In an advantageous embodiment, which allows

  to strengthen the protrusions in points, the hollows are arround-

  as a whole in such a way that the rounded indentations end in the ends, these rounded indentations being able to have different radii, so that

  the tips take a sawtooth shape.

  So that the opening of the heel -rabattable is possible in one direction and. be prevented in the other

  direction when the heel is folded down the section of the

  gripping wheel in which the pivot pin is located.

  the folding heel is rectilinear and its cross-section has, in one of the quadrants of the transverse half-section opposite the location where the gripping ring is attached to the ribbon, an arcuate periphery and, in the other quadrant, an angular periphery with a plane surface perpendicular to the mean plane of the ring

grasping.

  The following examples, appended to the accompanying drawing, illustrate the present invention. In this drawing, FIG. 1 shows a longitudinal section of the end of a measuring tape provided with a gripping ring and a folding heel, FIG. 2 represents the folding, isolated heel, seen from the front side of apply against the object to be measured, Figure 3 shows the folding heel in the state where it is before the folding giving it the U-shape and Figure 4 shows the gripping ring

  in the direction of the axis of its passage opening.

  In FIG. 1, the actual tape carrying the graduation of the measuring tape is simply represented. It was sufficient to essentially represent the region of the binding between the ribbon 10 and the gripping ring 12, and a folding heel 14

  articulated to the gripping ring 12.

  The gripping ring 12 is connected to the ribbon 10 by its section 16 facing the ribbon 10 by means of a lining 19 surrounding this section, so that the gripping ring 12 can pivot relative to the ribbon 10.

to the pad 19.

  The section 16 is rectilinear and has a circular cross section whose diameter is smaller than that of the zones of the ring 12 which are contiguous thereto, so that the junction between the lining 19 and these contiguous zones is done with outcrop. the opposite section 18 of the ring, which is also rectilinear, is provided with a through hole 20, which receives the pivot axis of the folding heel 14, which axis preferably has the shape

  a tubular rivet 22 (see Figure 1). This results in

  already that the folding heel 14 is hinged to the section

18 of the gripping ring 12.

  The folding heel 14 is made preferably

  from a metal sheet 'irnce but one can natu-

  to use another material for that purpose. The metal sheet preferably has a thickness of 0.6 mm. The

  folding heel can be made in a particular way

  In a simple way: a blank shown in FIG. 3 is cut out from a metal sheet, and then this blank is folded

  to give it the U shape shown in Figure 2.

  Thus the folding heel comprises two uprights 24 with a large area portion 26 and a narrow side 28 (Figure 2) for the application. Since the pivot axis 22 passes through the large area portions 26 of the uprights 24, the narrow side 28 is in the tensile direction of the strip 10 so that the sectional dimension of the uprights 24 in the direction

  traction is much greater than in the direc-

  perpendicular which corresponds to the thickness of the material. The tubular rivet 22 is pushed through a hole 30 (FIG. 3) of one of the uprights 24 into the through hole 20 of the gripping ring 12.

  until it comes out - through hole 30 of the other world

  As. The ends of the tubular rivet protruding

  the holes 30 are rolled around their circumference by an ope-

  rivet and thus the folding heel 24 is connected to the gripping ring 12 with the possibility of pivoting.

  The narrow sides 28 of the uprights 24 of the

  * Foldable 14 are equipped with 12 notches full-

  rounded shapes (Figure 3) forming protrusions

  34 which, when the heel is in the folded position,

  kill, come actually apply against the object whose length is to be measured. If we give different radii to rounded indentations these protrusions

are sawtoothed (Figure 1).

  The cross section of the section 18 of the ring appears in Figure 1. The contour of this cross section has the shape of an arc in the quadrant a. The quadrant b below has an angular shape such that there is a surface

  plane 36 on the side opposite the ribbon 10.

  In Figure 1 the heel is shown in the folded position against the gripping ring 12. In this position the cross member 38 which connects the uprights 24 of the folding heel 14 is applied against the surface 36

  of the section 18 of the ring so that the folding heel

  14 can not continue to rotate in the opposite direction of clockwise. From this position the folding heel 14 can rotate clockwise until the cross member 38 is applied against the upper face of the gripping ring 12. In this state the virtual right which joins the peaks 34 is perpendicular to the plane

mean 40 of the ring (-figure 1).

  The distance c between the virtual line joi-

  the peaks 34 and the mean plane 40 of the ring, plane in which is the pivot axis of the rabatrix heel

  table, that is the normal distance to the pivot axis

  is equal to the distance d which separates, in the direc-

  normal, the outer surface 42 of the cross member 38, the heel 14 being folded down, the pivot axis. This -condition the form, which we see in the figures let 3,

  24. When the heel 14 is in a retracted position

  beaten, as shown in Figure 1, this is

  the outer surface 42 of the upright 38, as

  application face, which forms the zero of the measuring tape, and when the heel is raised, it is the virtual line

  crests 34, defining the plane of application, which con-

Titrate the zero of the measuring tape.

R E V E N D I C A T IO N S

  1.- Measuring tape equipped, at one of its ends, with a gripping ring and a folding heel, in which the tape itself is fixed to the gripping ring by a section thereof lying in the plane of the ribbon and in which the folding heel is articulated to the gripping ring,

  can rotate around an axis perpendicular to the direction

  length of the ribbon and contained in the

  of the ribbon plane so as to occupy a posi-

  angularly perpendicular to the ribbon plane, and, in the folded position against the gripping ring, does not hinder the access to the opening of the gripping ring, the measurement tape characterized in that the folding heel 14 is in a U-shaped planar material and in that the surface portions 26 formed by the uprights 24 of the U are

  perpendicular to the pivot axis 22 of the folded heel

  table and receive this pivot axis 22.

  2. Measuring tape according to claim 1, characterized in that the pivot axis 22 of the heel -rabattable 14 through the section 18 of the gripping ring 12 which is opposite the section 16 by which the gripping ring 12 is attached to the tape 10, this

  in such a way that the amounts 24 are on the outside

  of the gripping ring 12.

  3. Measuring tape according to one of the claims

  1 and 2, characterized in that the normal distance (d) between the pivot axis 22 of the folding heel 14 and the surface portion 42 of the cross member 38 which is opposite to the pivot axis 22 of the folding heel 14

  is equal to the normal distance (c) between the pivot axis

  22 of the folding heel 14 and the narrow side 28 of the uprights 24 by which must make contact, side which is perpendicular to the surface of the cross member

  and which is turned towards the ribbon 10 and the ring of pre-

hension 12.

  4. Measuring tape according to claim 3, characterized in that the narrow side 28 of the upright 24 is provided with successive indentations 32 in its longitudinal direction so that there are protrusions

  pointed or peaks 34 between indentations 32.

  5. Measuring tape according to claim 4, characterized in that the notch 32 has a shape

general rounded.

  6.- Measuring tape according to any one of

  Claims 1 to 5, characterized in that the axis of

  pivoting is formed by a tubular rivet 22 which

  poured, with its projecting ends, the portion 18 of the ring which is opposite the ribbon 10 and the uprights 24,

  the projecting ends being bordered on their

  turn so that the fixation is ensured.

  - 7.- Measuring tape according to any of the

  Claims 1 to 6, characterized in that the section 18

  of the gripping ring 12 which receives the pivot axis

  22 of the folding heel 14 is rectilinear and has a cross section which, in one of the two quadrants,

  in this case quadrant (a), the transitional half-section

  opposite to the point where the ribbon 10 is fixed to the gripping ring 12, has an arcuate periphery and, in the other quadrant, that is to say (b), a

  angular periphery having a flat surface 36

  dicular to the middle plane 40 of the ring b prehension.