EP0391027B1 - Compass, particularly for draughtsmen - Google Patents

Compass, particularly for draughtsmen Download PDF

Info

Publication number: EP0391027B1
Authority: EP; European Patent Office
Prior art keywords: compass; rod element; runner; rod; axis
Prior art date: 1989-03-20
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

EP90101379A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP0391027A3 (en

EP0391027A2 (en

Inventor

Roberto Bergonzi

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.)

ILCA SpA

Original Assignee

ILCA SpA

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.)

1989-03-20

Filing date

1990-01-24

Publication date

1994-04-13

1990-01-24 Application filed by ILCA SpA filed Critical ILCA SpA

1990-10-10 Publication of EP0391027A2 publication Critical patent/EP0391027A2/en

1990-11-22 Publication of EP0391027A3 publication Critical patent/EP0391027A3/en

1994-04-13 Application granted granted Critical

1994-04-13 Publication of EP0391027B1 publication Critical patent/EP0391027B1/en

2010-01-24 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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Classifications

- 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
- B43L9/00—Circular curve-drawing or like instruments
- B43L9/16—Features common to compasses, dividers, and callipers
- B43L9/22—Leg-angle adjusting-means separate from pivots

Definitions

the present invention relates to a compass, particularly to a draughtsman compass of the type usually called bow compass or spring bow compass.
the bow compass is a compass adapted to draw circles or sections of circles of small radius and it is generally provided in two basic types.
a first type of bow compass has two hinged rods holding a point at each of their lower ends; one of the points can be substituted by a lead holder or a drawing pen.
a threaded bar has one end fastened to a median portion of one of the rods and engages a ring associated to the other rod but adapted to be rotated to finely adjust the distance between the two rods.
a rod element has a longitudinal bore in which a point is slidable along its longitudinal axis; a resilient member is associated to the rod element and its distance from the rod element itself, i.e. the aperture of the compass, is adjusted by means of a screw.
a lead holder or a drawing pen can he fastened to the resilient member.
British Patent No. 448.202 discloses a drawing compass wherein the legs are connected together by means of a link having an end engaging a slot in one of the legs.
the bow compasses of the prior art are susceptible to improvements regarding their mechanical reliability and their operation, especially if their structure is provided in plastics, for example, instead of the usual metallic materials.
the traditional bow compasses are also rather heavy in order to ensure a sturdy structure for a precise operation.
the aim of the present invention is that of providing a compass for draughtsmen, particularly a bow compass, that, owing to a particular geometrical configuration, eases the hand movement in the drawing and at the same time ensures an absolute precision.
an object of the invention is that of providing a bow compass which is constructively simple and easy to use.
Another object of the invention is that of providing a bow compass having low manufacturing costs.
a further object is that of providing a compass with a new and likeable styling.
a compass particularly for draughtsmen, comprising a first and a second rod element, said second rod element being hinged to said first rod element at their upper ends, a point being associated with the lower end of said first rod element, a fastening means for a drawing means being associated with the lower end of said rod second element, a slider member having a first end slidable in a first runner in said first rod element, characterized in that said slider member has a second end slidable in a second runner, said second runner being laid out in said second rod element, a screw element being associated with said first rod element and being adapted to cooperate with a threaded bore of said slider such that to a rotation of said screw element corresponds an axial shift of said slider.
a draughtsman compass 1 will be described, of the type usually called bow compass, adapted to draw circles of small radius.
the bow compass 1 comprises a first rod element 2 hinged to a second rod element 3 by means of an upper head 4.
the lower end of the first rod element 2 has a point 5, while the lower end of the second rod element 3 has a fastening means 6 for drawing means such as, for example, a lead holder or a drawing pen, not illustrated in the drawings for brevity.
a first runner is provided by means of two rectilinear grooves 7, on opposite sides of the first rod element, parallely laid out on the axis of the same first rod element.
a second runner is formed on the second rod element 3 and is provided by means of two grooves 8, again on opposite sides of the second rod element, slanted of a set angle relatively to the axis of the second rod element.
the runners of the first and second rod elements are engaged by the ends of a slider element 9 comprising a core 10 and two plates 11 provided with pins 12 adapted to slide in the grooves 7 and 8.
a threaded bore 13 is provided in the core 10 and is engaged by a screw element 14 supported on the first rod element 2.
the screw element 14 is substantially at the axis of the first rod element 2 and is inserted upwardly in the hand grip 15 of the bow compass.
a knob 16 is fastened on the upper end of the screw element to manually rotate the screw element itself.
the operation of the bow compass is very simple, it is in fact sufficient to rotate the knob 16 for axially displacing the slider 9 causing the two rod elements 2 ,3 to open or close, adjusting the aperture of the compass, because of the relative configuration of the grooves 7 and 8.
an advantage of the invention is that of the hand grip which is provided on the axis of rotation of the bow compass itself and which comprises also the aperture adjusting knob.
Another advantage of the particular structure of the bow compass according to the invention is that of allowing the use of different materials still keeping a remarkable mechanical reliability.
the materials employed, as well as the dimensions, may be any according to the specific needs and the state of the art.

Landscapes

Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
Mechanical Control Devices (AREA)
Transmission Devices (AREA)
Length-Measuring Instruments Using Mechanical Means (AREA)

EP90101379A 1989-03-20 1990-01-24 Compass, particularly for draughtsmen Expired - Lifetime EP0391027B1 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
IT1981589		1989-03-20
IT8919815A IT1228671B (it)	1989-03-20	1989-03-20	Compasso, particolarmente per disegnatori.

Publications (3)

Publication Number	Publication Date
EP0391027A2 EP0391027A2 (en)	1990-10-10
EP0391027A3 EP0391027A3 (en)	1990-11-22
EP0391027B1 true EP0391027B1 (en)	1994-04-13

Family

ID=11161512

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP90101379A Expired - Lifetime EP0391027B1 (en)	1989-03-20	1990-01-24	Compass, particularly for draughtsmen

Country Status (4)

Country	Link
EP (1)	EP0391027B1 (it)
DE (1)	DE69008013T2 (it)
ES (1)	ES2050850T3 (it)
IT (1)	IT1228671B (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP2000505374A (ja) *	1996-03-02	2000-05-09	ハウリ・ベルンハルト	掴み部分を備えたコンパス

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE77106C (de) *			H. SCHWARTZ in Berlin, Arndtstr. 44	Zirkel mit am Kopf angebrachter Mefsskala
BE347916A (it) *	1928-01-23
US1958989A (en) *	1932-07-19	1934-05-15	Fischer John	Compass
GB448202A (en) *	1936-01-08	1936-06-04	Universal Woodworking Company	Improvements in drawing compasses and dividers
US2864172A (en) *	1956-11-14	1958-12-16	Buck Ralph	Divider
CS213617B1 (en) *	1977-12-06	1982-04-09	Zdenko Stanicek	Catching head particularly for industrial robots

1989
- 1989-03-20 IT IT8919815A patent/IT1228671B/it active
1990
- 1990-01-24 ES ES90101379T patent/ES2050850T3/es not_active Expired - Lifetime
- 1990-01-24 DE DE69008013T patent/DE69008013T2/de not_active Expired - Fee Related
- 1990-01-24 EP EP90101379A patent/EP0391027B1/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
IT1228671B (it)	1991-07-03
IT8919815A0 (it)	1989-03-20
EP0391027A3 (en)	1990-11-22
ES2050850T3 (es)	1994-06-01
DE69008013D1 (de)	1994-05-19
DE69008013T2 (de)	1994-11-17
EP0391027A2 (en)	1990-10-10

Legal Events

Date	Code	Title	Description
1990-08-25	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1990-10-03	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1990-10-10	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): CH DE ES FR GB LI NL
1990-11-22	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): CH DE ES FR GB LI NL
1991-03-06	17P	Request for examination filed	Effective date: 19901215
1992-10-14	17Q	First examination report despatched	Effective date: 19920901
1994-02-25	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1994-04-13	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): CH DE ES FR GB LI NL
1994-04-13	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: NL Effective date: 19940413 Ref country code: LI Effective date: 19940413 Ref country code: CH Effective date: 19940413
1994-05-19	REF	Corresponds to:	Ref document number: 69008013 Country of ref document: DE Date of ref document: 19940519
1994-06-01	REG	Reference to a national code	Ref country code: ES Ref legal event code: FG2A Ref document number: 2050850 Country of ref document: ES Kind code of ref document: T3
1994-07-29	REG	Reference to a national code	Ref country code: CH Ref legal event code: PL
1994-08-12	ET	Fr: translation filed
1994-09-16	NLV1	Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
1995-01-24	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Effective date: 19950124
1995-02-16	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1995-02-16	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1995-04-05	26N	No opposition filed
1995-09-20	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 19950124
1996-01-31	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: FR Payment date: 19960131 Year of fee payment: 7 Ref country code: ES Payment date: 19960131 Year of fee payment: 7
1996-03-27	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 19960327 Year of fee payment: 7
1997-01-25	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19970125
1997-09-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Effective date: 19970930
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1999-05-01	REG	Reference to a national code	Ref country code: ES Ref legal event code: FD2A Effective date: 19990301

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