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US3908275A - Drawing apparatus - Google Patents

Drawing apparatus Download PDF

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Publication number
US3908275A
US3908275A US434112A US43411274A US3908275A US 3908275 A US3908275 A US 3908275A US 434112 A US434112 A US 434112A US 43411274 A US43411274 A US 43411274A US 3908275 A US3908275 A US 3908275A
Authority
US
United States
Prior art keywords
rotary member
head
angle
detection means
drawing board
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
US434112A
Other languages
English (en)
Inventor
Osamu Shimizu
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.)
Mutoh Industries Ltd
Original Assignee
Mutoh Industries Ltd
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 Mutoh Industries Ltd filed Critical Mutoh Industries Ltd
Application granted granted Critical
Publication of US3908275A publication Critical patent/US3908275A/en
Anticipated expiration legal-status Critical
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
    • B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
    • B43L13/02—Draughting machines or drawing devices for keeping parallelism
    • B43L13/08—Protractor heads

Definitions

  • a drawing apparatus comprising a head adapted to be placed in any position on the surface of drawing board through the agency of no outside supporter, a pair of rulers disposed at right angles to each other and pivotally connected to the head, and direction control means for automatically causing a predetermined one of the rulers to orient itself in a predetermined direction. If one haphazardly places the head in any position on the drawing board without paying attention to the direction in which it is oriented the rulers are controlled by the direction control means such that the predetermined one of the rulers orients itself in a predetermined direction. Accordingly, if the head is shifted on the drawing board, the rulers automatically orients itself in slaved relationship as if they moved in translation motion on the drawing board.
  • This invention relates in general to drawing apparatus constructed such that if the head is moved in any direction along the surface of a drawing board, the rulers connected to the head move in translation motion on the the drawing board.
  • the invention relates to drawing apparatus of the type described which is characterized in that if the head is haphazardly placed through the agency of no outside supporter in any position on the drawing board without paying attentionto the'direction in which the head is oriented, then the direction in which the rulers are oriented is controlled such that one of the rulers automatically orients itself to form a predetermined angle with respect to a reference line.
  • the reference line refers to an imaginary elongated single straight line disposed in a plane parallel to the surface of the drawing board.
  • the reference line may be an imaginary line drawn parallel to the line of magnetic force of the earth; it may be an imaginary line formed on the surface of the drawing board disposed in an inclined position when a line perpendicular to the ground is projected onto the surface of the drawing board; it may be a line parallel to a copper wire disposed across the width of the drawing board, or it may be a line parallel to a signal receiving member disposed in a straight line on the surface of the drawing board.
  • Drawing apparatus of the prior art have been generally constructed such that their heads are each supported by a support arm of the pantagraph type, rails or other supporter and the head as well as the rulers are moved in translation motion along the surface of the drawing board by the guiding function of the supporter.
  • the drawing apparatus has the disadvantage of the rails or arm interfering with a drawing operation.
  • a general object of this invention is to provide a drawing apparatus comprising a head and a pair of rulers pivotally connected thereto, wherein when the head supported by no outside supporter is haphazardly placed on the surface of a drawing board without paying any attention to the direction in which it is oriented, an angle formed by a predetermined one of the pair of rulers with respect to the aforementioned reference line is automatically detected and the rulers are controlled to orient themselves to that the angle may correspond to an angle of a predetermined value, whereby the angle formed by the predetermined one of the pair of rulers with respect to the reference line can be made to coincide with the angle of the predetermined value regardless of the direction in which the head is oriented as if the rulers moved in parallel motion.
  • Another object of the invention is to provide a drawing apparatus comprising angle detection means mounted in the head for detecting an angle formed by a predetermined one of the pair of rulers with respect to the reference line when the head is haphazardly place on the surface of the drawing board, and producing a signal which controls the direction in which the rulers are oriented and causes the predetermined one of the pair of rulers to form an angle of a predetermined value with respect to the reference line.
  • Another object of the invention is to provide a drawing apparatus comprising an angle detector mounted in the head and utilizing the directivity of a float in a fluid for detecting an angle formed by the predetermined one of the pair of rulers with respect to the reference line and producing a signal which controls the direction in which the rulers are oriented and causes the predetermined one of the rulers to form a an angle of predetermined value with respect to the reference line.
  • Another object of the invention is to provide a drawing apparatus comprising an angle detector mounted in the head and utilizing the directivity of a pendulum member for detecting an angle formed by the predetermined one of the pair of rulers with respect to the reference line, and producing a signal which controls the direction in which the rulers are oriented and causes the predetermined one of the rulers to form an angle of a predetermined value with respect to the reference line.
  • Another object of the invention' is to provide a drawing apparatus comprising an angle detector mounted in the head and utilizing the unidirectivity of a magnetic compass whose needle points to a direction parallel to the magnetic lines of force of the earth as means for detecting the angle formed by the predetermined one of the rulers with respect to the reference line, and producing a signal which controls the direction in which the rulers are oriented and causes the predetermined one of the rulers to form an angle of a predetermined value with respect to the reference line.
  • Still another object of the invention is to provide a drawing apparatus comprising an angle detector mounted in the head and utilizing a pressure responding element which responds to a change in the pressure of a liquid caused in the direction in which the rulers are oriented as means for detecting the angle formed by the predetermined one of the rulers with respect to the reference line, and producing a signal which controls the direction in which the rulers are oriented and causes the predetermined one of the rulers to form an angle of a predetermined value with respect to the reference line.
  • Still another object of the invention is to provide a drawing apparatus comprising an angle detector mounted in the head and utilizing a potentiometer whose resistance shows a change when there is a change in the direction in which the rulers are oriented as means for detecting the angle formed by the predetermined one of the rulers with respect to the reference line, and producing a signal which controls the direction in which the rulers are oriented' and causes the predetermined one of the rulers to form an angle of a predetermined value with respect to the reference line.
  • Still another object of the invention is to provide a drawing apparatus comprising a suction device disposed under the head having no outside supporter for detachably attaching the head to the surface of the drawing board by the drawing force exerted by the suc-
US434112A 1973-01-31 1974-01-17 Drawing apparatus Expired - Lifetime US3908275A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48012039A JPS585800B2 (ja) 1973-01-31 1973-01-31 自在平行定規装置

Publications (1)

Publication Number Publication Date
US3908275A true US3908275A (en) 1975-09-30

Family

ID=11794447

Family Applications (1)

Application Number Title Priority Date Filing Date
US434112A Expired - Lifetime US3908275A (en) 1973-01-31 1974-01-17 Drawing apparatus

Country Status (10)

Country Link
US (1) US3908275A (it)
JP (1) JPS585800B2 (it)
AU (1) AU473389B2 (it)
BR (1) BR7400678D0 (it)
CA (1) CA999734A (it)
CH (1) CH576356A5 (it)
DE (1) DE2404467C3 (it)
FR (1) FR2216129B1 (it)
GB (1) GB1438063A (it)
IT (1) IT1004828B (it)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4151649A (en) * 1976-09-17 1979-05-01 Mutoh Industry, Ltd. Universal parallel ruler device
WO1987005863A1 (en) * 1986-04-03 1987-10-08 Frazer Design Consultants Limited Magnetically oriented draughting instrument
US4785546A (en) * 1987-06-03 1988-11-22 Achilles Tomasini Lithographic production planning system
US20090128858A1 (en) * 2005-03-30 2009-05-21 Masato Kiuchi Printed Product, Printed Product Detection Method and Detection Apparatus, and Authentication Method and Authentication Apparatus
CN105538967A (zh) * 2016-01-11 2016-05-04 上海理工大学 残疾人辅助绘图装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2940429C2 (de) * 1979-10-05 1986-02-20 Marabuwerke Erwin Martz Gmbh & Co, 7146 Tamm Zeichenmaschinenkopf
GB2189616A (en) * 1986-02-10 1987-10-28 Colin Leonard Talbot Engineer's protractor
CN111942064A (zh) * 2020-06-28 2020-11-17 怀化学院 一种产品设计绘图用尺

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3339285A (en) * 1961-10-25 1967-09-05 Keuffel & Esser Co Drafting machine
US3638320A (en) * 1970-05-22 1972-02-01 Keuffel & Esser Co Drafting machine scale locking device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2893134A (en) * 1954-03-22 1959-07-07 Preco Inc Automatic leveling control and clinometer
DE1264997B (de) * 1963-11-08 1968-03-28 Gottlieb Bullinger Dr Ing Zeicheneinrichtung mit einem auf eine oder mehrere Grundrichtungen einstellbaren Lineal
DE1937465A1 (de) * 1968-07-24 1970-04-09 Konishiroku Photo Ind Vorrichtung zum Feststellen kleinster Neigungen eines Objektes gegenueber einer Ebene

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3339285A (en) * 1961-10-25 1967-09-05 Keuffel & Esser Co Drafting machine
US3638320A (en) * 1970-05-22 1972-02-01 Keuffel & Esser Co Drafting machine scale locking device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4151649A (en) * 1976-09-17 1979-05-01 Mutoh Industry, Ltd. Universal parallel ruler device
WO1987005863A1 (en) * 1986-04-03 1987-10-08 Frazer Design Consultants Limited Magnetically oriented draughting instrument
AU607135B2 (en) * 1986-04-03 1991-02-28 Frazer Design Consultants Limited Magnetically oriented draughting instrument
US4785546A (en) * 1987-06-03 1988-11-22 Achilles Tomasini Lithographic production planning system
US20090128858A1 (en) * 2005-03-30 2009-05-21 Masato Kiuchi Printed Product, Printed Product Detection Method and Detection Apparatus, and Authentication Method and Authentication Apparatus
US8055064B2 (en) * 2005-03-30 2011-11-08 National Printing Bureau, Incorporated Administrative Agency Printed product, printed product detection method and detection apparatus, and authentication method and authentication apparatus
CN105538967A (zh) * 2016-01-11 2016-05-04 上海理工大学 残疾人辅助绘图装置
CN105538967B (zh) * 2016-01-11 2017-05-03 上海理工大学 残疾人辅助绘图装置

Also Published As

Publication number Publication date
BR7400678D0 (pt) 1974-11-05
AU6471974A (en) 1975-07-24
IT1004828B (it) 1976-07-20
FR2216129A1 (it) 1974-08-30
JPS585800B2 (ja) 1983-02-01
FR2216129B1 (it) 1979-08-31
CA999734A (en) 1976-11-16
GB1438063A (en) 1976-06-03
JPS49102423A (it) 1974-09-27
AU473389B2 (en) 1976-06-17
DE2404467C3 (de) 1980-01-31
DE2404467A1 (de) 1974-08-08
CH576356A5 (it) 1976-06-15
DE2404467B2 (de) 1979-05-17

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