US3623230A - Folding measuring rule - Google Patents

Folding measuring rule Download PDF

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Publication number
US3623230A
US3623230A US879029A US3623230DA US3623230A US 3623230 A US3623230 A US 3623230A US 879029 A US879029 A US 879029A US 3623230D A US3623230D A US 3623230DA US 3623230 A US3623230 A US 3623230A
Authority
US
United States
Prior art keywords
limbs
rule
rivet
hinge
folding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US879029A
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English (en)
Inventor
Andre Quenot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manufacture Quenot Mabo SA
Original Assignee
Manufacture Quenot Mabo SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Manufacture Quenot Mabo SA filed Critical Manufacture Quenot Mabo SA
Application granted granted Critical
Publication of US3623230A publication Critical patent/US3623230A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/02—Rulers with scales or marks for direct reading
    • G01B3/04—Rulers with scales or marks for direct reading rigid
    • G01B3/06—Rulers with scales or marks for direct reading rigid folding

Definitions

  • Each such hinge includes a resilient locking element extending between the two limbs and with at least one projection out of the plane of the rule.
  • One of the limbs of the pair has at least one depression into which said projection is engageable when the limbs are in full open or closed position, the locking element being resiliently displaceable away from the limb with depressions during pivoting of the limbs.
  • This invention relates to folding measuring rules.
  • Rules are known of the type which are made of a number of limbs which fold one upon another at hinges formed by rivets and are made of a synthetic plastics material. These rules may include means for ensuring the maintenance of the folded or unfolded position of two adjacent limbs, namely two metallic springs mounted on the ends of the limbs in the same manner as on folding rules made of wood or of duralumin of a conventional type.
  • the first type of folding rule with metallic springs inserted is relatively expensive and its hinges do not show any progress with respect to those of rules of the conventional type.
  • each pair of adjacent limbs is pivotally hinged by a rivet
  • each such hinge in- I cludes a locking element made of resilient material which extends between the two limbs and has at least one projection out of the plane of the rule, and one of the limbs of the pair has at least one depression into which said projection is engageable when the limbs are in fully open or closed positions, the locking element being resiliently displaceable away from the limb having the depressions during pivoting the limbs.
  • FIG. 1 represents a view from above of a hinge and portions of the adjacent limbs of a rule according to the invention which is in the open position.
  • FIG. 2 is a section along line 11-11 of FIG. 1;
  • FIG. 3 is a view from below of the upper limb, the lower limb being removed;
  • FIG. 4 is a transverse section of the rule and hinge, passing through the rivet on line IVIV of FIG. 2;
  • FIGS. 5 and 6 are views from above and below respectively of the upper limb without its hinge mechanism.
  • the folding rule according to the invention comprises limbs such as 1 and 2 made of a synthetic material, for example, covered or reinforced by some fibre (such as glass).
  • the end of the upper limb 1 is provided, at its lower face, with a recessed area 3 of rectangular shape.
  • Four holes 4 pass through the limb 1 at the corners of the recessed area 3, and said recessed area receives a locking bar 5 made of synthetic selflubricating material, for example of the type sold under the trade mark Delrin.
  • the locking bar 5 which is of rectangular shape has at its four corners, four circular projections (bosses or teats) 6 which can engage in the holes 4.
  • the locking bar also has a central annular projection 7 extending both above and below the bar and projecting into pivoting holes of corresponding dimensions which are formed in the limbs 1 and 2.
  • the locking bar 5 also preferably has a certain intrinsic elasticity which permits its two extremities situated at the level of the projection 6 to merge above the lower face of the limb 1 so as to form reliefs such as that shown at 10 in FIG. 2. These reliefs penetrate into a corresponding depression 11, of rectangular form, formed in the upper face of the limb 2. Looking together of the two limbs is thus effected by means of this penetration of the bar 5 into the hole 11.
  • the bar 5 can be temporarily displaced within the rectangular hollow 3 which allows the two branches to pivot one over the other practically without deformation of the limbs at the level of their overlapping avoids the limbs made of synthetic material being subjected to permanent deformation since the limbs are not subjected to any constraint.
  • the self-lubricating character of the synthetic material forming the locking bar which avoids the friction of the limbs of the same type one on another, reduces the friction of the bar with the lower limb which thus reduces the risk of deterioration and wearing of the hinge.
  • an H-shaped metallic spring 12 (FIG. 4).
  • the limbs 13 of this spring 12 are cambered downwardly so that the ends of the limbs engage over the projections 6 so as to ensure a precise positioning of the adjacent limbs in open or closed position.
  • the H-spring 12 is preferably arranged inside a correspondingly shaped depression (-FIG. 5). The spring 12 thus does not increase the thickness of the hinge and can also contribute to ensure a further rigidity to the limb 1 at the region of the hinge.
  • a spring 15 (FIG. 4) identical to the spring 12.
  • This spring 15 which is also previously cambered, further allows the general elasticity of the hinge to be increased. It is to be noted that the springs 12 and 15 do not extend to the edges of the rule and this allows the continuation as far as the end of each limb of the centimetric or other gradation of these limbs.
  • the invention is not limited to the particular form described.
  • shape of the engagement element such as the locking bar can be altered and the reliefs which are formed thereon can have any configuration provided that they co-operate with complimentary reliefs or depressions of the adjacent limb.
  • the elasticity of the engagement elements can be of the same nature as that of the bar or of the springs described or even of a combination of the two.
  • the limbs of the rule can have a certain looseness along the rivet or can have onl a very short play along this rivet according to different embodiments.
  • a hinge for connecting two sections of a folding measuring rule an improvement comprising, in combination, first and second sections of a folding measuring rule, each said section having a recessed area in an end portion thereof, a rivet pivotally joining said end portions of said sections wherein said recessed areas are disposed in a face-to-face relation, and wherein said rivet is disposed centrally of said recessed area of said second section, a resilient locking member disposed within said recessed area of said first section and extending longitudinally of said first section, said locking member having a free end and having an opposing end fixed with respect to said first section, and means for resiliently urging said free end of said locking member into said recessed area of said second section to impede pivotal relative movement of said sections when said sections are aligned longitudinally, wherein said relative pivotal movement causes defiection of said locking member out of said second recess, and whereby said first and second sections are resiliently held in place when aligned longitudinally and are pivotal with respect to each other in a deflection-free manner.
  • a hinge for connecting two sections of a folding measuring rule an improvement comprising, in combination, first and second sections of a folding rule, each said section having a rectangular recessed area in an end portion thereof, a rivet pivotally joining said end portions of said sections wherein said recessed areas are disposed in a face-to-face relation, and wherein said rivet is disposed centrally of both said recessed areas, a rectangular, plateshaped, resilient locking member disposed within said recessed area of said first section, said locking member having a transverse sleeve fixed centrally thereof and extending through said first and second sections and receiving said rivet therethrough, and means for resiliently urging the longitudinally remote portions of said locking member into said recessed area of said second section to impede pivotal movement when said sections are aligned longitudinally.
  • a hinge for connecting two sections of a folding measuring rule as set forth in claim 4, in which said first section has four holes therethrough at the corners of its said recessed area, and in which said means for urging said locking members into said second recessed area comprises four projections connected one each to the respective corners of said locking member for extending into said holes, and first spring means connected to said first section for covering said holes to engage said projections and resiliently urge said locking member toward said second section.
  • said first spring means comprises an H-shaped spring having an interconnecting member and four legs extending therefrom, wherein said interconnecting member receives said rivet therethrough for being held in place, and wherein said four legs cover said four holes.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Springs (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Package Frames And Binding Bands (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Binders And Loading Units For Sheaves (AREA)
  • Clamps And Clips (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)
  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)
US879029A 1968-12-02 1969-11-24 Folding measuring rule Expired - Lifetime US3623230A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR176221 1968-12-02

Publications (1)

Publication Number Publication Date
US3623230A true US3623230A (en) 1971-11-30

Family

ID=8657704

Family Applications (1)

Application Number Title Priority Date Filing Date
US879029A Expired - Lifetime US3623230A (en) 1968-12-02 1969-11-24 Folding measuring rule

Country Status (7)

Country Link
US (1) US3623230A (enrdf_load_stackoverflow)
BE (1) BE775825Q (enrdf_load_stackoverflow)
CH (1) CH484410A (enrdf_load_stackoverflow)
DE (2) DE6936598U (enrdf_load_stackoverflow)
ES (2) ES149904Y (enrdf_load_stackoverflow)
FR (1) FR1596743A (enrdf_load_stackoverflow)
GB (1) GB1288054A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8782914B1 (en) 2011-03-27 2014-07-22 Gregory G. DeLuca Segmented measuring assembly and method of use
CN115790346A (zh) * 2022-12-08 2023-03-14 中交建筑集团有限公司 一种具有自动校准功能的智能靠尺

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8782914B1 (en) 2011-03-27 2014-07-22 Gregory G. DeLuca Segmented measuring assembly and method of use
CN115790346A (zh) * 2022-12-08 2023-03-14 中交建筑集团有限公司 一种具有自动校准功能的智能靠尺

Also Published As

Publication number Publication date
DE1957646A1 (de) 1970-07-16
FR1596743A (enrdf_load_stackoverflow) 1970-06-22
ES149904U (es) 1969-12-01
ES149904Y (es) 1970-06-16
BE775825Q (fr) 1972-03-16
CH484410A (fr) 1970-01-15
ES368916A1 (es) 1971-07-16
GB1288054A (enrdf_load_stackoverflow) 1972-09-06
DE1957646B2 (de) 1973-02-08
DE6936598U (de) 1970-07-16

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