US940118A - Flexible ruler for drawing curves. - Google Patents

Flexible ruler for drawing curves. Download PDF

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Publication number
US940118A
US940118A US46005108A US1908460051A US940118A US 940118 A US940118 A US 940118A US 46005108 A US46005108 A US 46005108A US 1908460051 A US1908460051 A US 1908460051A US 940118 A US940118 A US 940118A
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United States
Prior art keywords
plate
ruler
flexible ruler
strips
plates
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Expired - Lifetime
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US46005108A
Inventor
Carl Bartels
Otto Bartels
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Individual
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Individual
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Priority to US46005108A priority Critical patent/US940118A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
    • B43L13/20—Curve rulers or templets
    • B43L13/22—Adjustable curve rulers

Definitions

  • This invention relates partlcularly to drawing instruments; and has for its object to provide a cheap, slmple and eflective ruler which may with ease be bent into any desired single or compound curve and retain its shape until changed to another form.
  • a and 1) indicate two parallel resilient plates preferably made of thin sheet steel of any suitable length or width, spaced apart and so held by means of a series of bent separating pieces 0, riveted to one plate as a and slidably connected to the other plate 5.
  • Each separating piece 0 is formed of a narrow strip of resilient metal, flat at its central portion where it is riveted transversely on the plate a. A short distance beyond the rivets, the ends of the strips 0 are bent away from the plate a and converge toward each other, slightly, for a suitable distance, and then bent again outwardly in a plane parallel to said plate. Finally, the ends of the strips are doubled upon themselves to form loops (Z between which the plate I) is held by frictional contact.
  • the plate I) is made slightly narrower than the plate a so that the width between the bent portions of the loops (Z will equal the width of the plate (1, thus enabling either edge of the latter plate to stand perpendicular to, and in contact with, any surface on which it may be placed.
  • a flexible ruler comprising two resilient plates held in spaced parallel relation, and a plurality of separating strips immovably attached to one plate and slidably connected at each end to opposite edges of the other plate.
  • a flexible ruler comprising two resilient plates held in spaced parallel relation, and separating strips having looped ends immovably attached intermediate their ends to one plate and slidably connected by their looped ends to the other plate.
  • a flexible ruler comprising two resilient plates, and strips immovably attached to one plate and adapted to hold the other plate in spaced parallel relation thereto by loops on the ends of said strips frictionally engaging the second named plate.
  • a flexible ruler comprising two resilient plates held in spaced parallel relation, and a plurality of separating strips i1nmov ably attached intermediate their ends to one of said plates and having loops formed on their ends to frictionally embrace the edges of the other plate and slide thereon when the ruler is deflected.
  • a flexible ruler comprising two resilient plates held in spaced parallel relation, resilient strips fixed immovably on one of said plates and slidably attached to the other plate by self-acting frictional connections.
  • a flexible ruler comprising two spaced parallel plates, and resilient connecting strips, said strips immovably fastened to one of said plates and having their ends bent into loops to frictionally grasp the other plate and slide thereon.

Landscapes

  • Drawing Aids And Blackboards (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Description

0. & 0. BARTELS. v FLEXIBLE RULER FOR DRAWING CURVES. APPLICATION FILED OUT. 29, 1908.
245-526 6 5. e5 flame/z %21s I CarZ 3827 2 6 W gmg g wk w A Patented Nov. 16, 1909 same parts CARL BABTELS AND OTTO BABTELS, OF SCHWAAN, GERMANY.
FLEXIBLE RULER FOB DBAIVING CURVES.
Specification of Letters Patent.
Patented Nov. 16, 1909.
Application filed October 29, 1908. Serial No. 460,051.
provements in Flexible Rulers for Drawing Curves, of which the following is a specification.
This invention relates partlcularly to drawing instruments; and has for its object to provide a cheap, slmple and eflective ruler which may with ease be bent into any desired single or compound curve and retain its shape until changed to another form.
Vith this object in view the invention consists of the novel construction, combination and arrangement of parts hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which Figure l is a face view of a portion of a ruler embodying our invention; Fig. 2 an edge view of the same showing it bent into a compound curve, and, Fig. 3 a cross sectional view on the line 3-3 of Fig. 2.
Similar reference letters are used for the in all the figures.
In the drawing, a and 1) indicate two parallel resilient plates preferably made of thin sheet steel of any suitable length or width, spaced apart and so held by means of a series of bent separating pieces 0, riveted to one plate as a and slidably connected to the other plate 5.
Each separating piece 0 is formed of a narrow strip of resilient metal, flat at its central portion where it is riveted transversely on the plate a. A short distance beyond the rivets, the ends of the strips 0 are bent away from the plate a and converge toward each other, slightly, for a suitable distance, and then bent again outwardly in a plane parallel to said plate. Finally, the ends of the strips are doubled upon themselves to form loops (Z between which the plate I) is held by frictional contact.
The plate I) is made slightly narrower than the plate a so that the width between the bent portions of the loops (Z will equal the width of the plate (1, thus enabling either edge of the latter plate to stand perpendicular to, and in contact with, any surface on which it may be placed.
To set the ruler, it is bent so that the plate a will partake of the shape desired,
the loops d of the pieces 0 sliding over the plate 7) as the plate a is curved, said loops grasping the plate 6 with suflicient friction to hold the plates as curved, and prevent them of their own accord from assuming a straight line or altering their shape.
Having thus described the invention, we claim 1. A flexible ruler comprising two resilient plates held in spaced parallel relation, and a plurality of separating strips immovably attached to one plate and slidably connected at each end to opposite edges of the other plate.
2. A flexible ruler comprising two resilient plates held in spaced parallel relation, and separating strips having looped ends immovably attached intermediate their ends to one plate and slidably connected by their looped ends to the other plate.
3. A flexible ruler comprising two resilient plates, and strips immovably attached to one plate and adapted to hold the other plate in spaced parallel relation thereto by loops on the ends of said strips frictionally engaging the second named plate.
4. A flexible ruler comprising two resilient plates held in spaced parallel relation, and a plurality of separating strips i1nmov ably attached intermediate their ends to one of said plates and having loops formed on their ends to frictionally embrace the edges of the other plate and slide thereon when the ruler is deflected.
5. A flexible ruler comprising two resilient plates held in spaced parallel relation, resilient strips fixed immovably on one of said plates and slidably attached to the other plate by self-acting frictional connections.
6. A flexible ruler comprising two spaced parallel plates, and resilient connecting strips, said strips immovably fastened to one of said plates and having their ends bent into loops to frictionally grasp the other plate and slide thereon.
In testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.
CARL BARTELS. OTTO BARTELS.
WVitnesses:
J 011s. VVULF, Jncon BRILFELDS.
US46005108A 1908-10-29 1908-10-29 Flexible ruler for drawing curves. Expired - Lifetime US940118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US46005108A US940118A (en) 1908-10-29 1908-10-29 Flexible ruler for drawing curves.

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US46005108A US940118A (en) 1908-10-29 1908-10-29 Flexible ruler for drawing curves.

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US940118A true US940118A (en) 1909-11-16

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US46005108A Expired - Lifetime US940118A (en) 1908-10-29 1908-10-29 Flexible ruler for drawing curves.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2607119A (en) * 1946-11-02 1952-08-19 Henry E Walker Drafting instrument
US2679693A (en) * 1953-09-01 1954-06-01 Maes Aurelius Adjustable pipe template

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2607119A (en) * 1946-11-02 1952-08-19 Henry E Walker Drafting instrument
US2679693A (en) * 1953-09-01 1954-06-01 Maes Aurelius Adjustable pipe template

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