US3866326A - Drawing board - Google Patents

Drawing board Download PDF

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Publication number
US3866326A
US3866326A US280270A US28027072A US3866326A US 3866326 A US3866326 A US 3866326A US 280270 A US280270 A US 280270A US 28027072 A US28027072 A US 28027072A US 3866326 A US3866326 A US 3866326A
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United States
Prior art keywords
sliding piece
respect
connecting means
rail
drawing device
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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
US280270A
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English (en)
Inventor
Walter Hebel
Ulrich Hebel
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.)
Individual
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Individual
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Filing date
Publication date
Priority claimed from DE19712140903 external-priority patent/DE2140903C3/de
Priority claimed from DE19722205621 external-priority patent/DE2205621A1/de
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Expired - Lifetime legal-status Critical Current

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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
    • B43L13/02—Draughting machines or drawing devices for keeping parallelism

Definitions

  • ABSTRACT A small sized drawing board is provided, on which a drawing rail, preferably of triangular shape, is aligned by means of ridges or grooves at the edges.
  • the rail is usable for the drawing 01' lines or alignment of other drawing devices, especially triangles, adjustable drawing heads with square rules, writing or drawing patterns, or the like.
  • the additional drawing devices especially drawing triangles, squares, writing and drawing patterns or the like loosely held against the drawing edge of the drawing rail and aligned against it formlocking by hand'pressure. This method, however, is still relatively complicated, because the.additional drawing devices can lose their exact coordination to the drawing rail as soon as they are not heldtany longer by hand.
  • the drawing head is guided by a parallel adjustable rail with two parallel guiding edges, one of which also can be used for the drawing-of lines.
  • a guiding skid attached to the drawing head is provided with a guidance groove and can be set upon the rail in such a manner that the sides of the groove touch the guidance edges of the rail. In this way the drawing head can be moved free of play along the rail.
  • This solution cannot be applied to small size drawing boards because the drawing rail preferably is of a triangular shape and does not provide guiding edges.
  • the aim of the invention is to equip a small size drawing board with an exactly aligned drawing rail by the easiest supplementary means in such a manner that one can work with it in the same way as with a drawing installation of a larger size.
  • an enforced alignment at .the drawing rail is to be provided without losing the lowest possible constructional height of the drawing rail, which is necessary for its easy use and for the precision of the drawing.
  • This invention involves a drafting board, a straightedge whose movement on the drafting board is restricted so that-it remains'parallel with respect to the board, and a drafting fixture whose movement is restricted to linear motion along the straight-edge.
  • the sliding connection between the various elements of the invention is obtained by the cooperation of lands and grooves on the elements.
  • the drafting fixture has edges which can easily be reoriented with respect to the straightedge.
  • FIG. 1 is a topview presentation of part of a drawing board with drawing rail aligned to it and coordinated drawing triangle,
  • FIG. 2 is a sectional drawing along line lllI through the drawing board as in FIG. 1,
  • FIG. 3 is a larger scale sectional drawing along line Ill-III of FIG. 1,
  • FIG. 4 is a topview presentation corresponding with FIG. 1 of a drawing rail with swingable square rule aligned thereto,
  • FIG. 5 is a sectional drawing along line V-V in FIG.
  • FIG. 6 is a larger scale sectional drawing along line VIVl in FIG. 4,
  • FIG. 7 is a larger scale sectional drawing corresponding with FIG. 5 through a varied application of a sliding piece forming the swivel carriage for the square rule,
  • FIG. 8 is a sectional drawing corresponding with FIG. 5 through again a varied application of the sliding piece serving as swivel carriage for the square rule,
  • FIG. 9 is a sectional drawing along line IX-IX in FIG. 8,
  • FIG. 10 is a sectional drawing along Line X-X in FIG. 8,
  • FIG. 1 l is a view in longitudinal section of a hatching device arranged at the sliding piece
  • FIG. 12 is a sectional drawing along line XII-XII in FIG. 11.
  • the drawing rail provides a guidance bar and/or a guidance groove running parallel to its drawing edge, along which the additional drawing devices can be shifted by means of a sliding piece.
  • the sliding piece of the additional drawing device can be provided with a groove adapted to the guidance bar and/or a bar adapted to the guidance groove as a guiding element. It has turned out to be especially advantageous if the lateral surfaces of the bars and/or grooves are beveled wholly or in part.
  • the bar and/or the groove of the drawing rail or the sliding piece is beveled at the bottom on one or both sides.
  • the sliding piece can be fastened to the additional drawing device.
  • the additional drawing device whereby it consists preferably of a groove and/or bar built immediately into a drawing triangle or a writing or drawing pattern.
  • the sliding piece joined to the additional drawing device is detachable.
  • the sliding piece can be provided with coupling protrusions, e.g., two knobs, which engage and catch in corresponding coupling indentations or holes in the additional drawing device.
  • the use of the additional drawing device is made easier if the sliding piece is provided with a handle.
  • the sliding piece is built with a swivel carriage for a drawing head with square rule.
  • the hole in the sliding piece widens conically downwards, the square rule being placed underneath the sliding piece and with a conical projection on its upper side" fitting into the hole of the sliding piece, it will be possible to shift the square rule centricly in a simple but permanently precise manner.
  • the attachment on the square rule extends over the top of the sliding piece and can be used as a handle to swing the square rule in the swivel carriage which forms the sliding piece.
  • an especially simple feature of the invention consists in the fact that the square rule with its attachment and the handle is built as one piece. Furthermore hereby the square rule can have in one piece two drawing edges running at right angles to each other and consisting of transparent material.
  • the square rule and/or the sliding piece forming the swivel carriage can be supplied with graduations and reading markings centrally located around the axis.
  • the base plate is provided with locking devices for the square rules.
  • these locking devices can be built on the conical surfaces of the hole in the base plate and at the attachment of the square rule. These locking devices can be put in gear by exerting pressure upon the base plate in each swivel position and also put again out of gear at any time by pressure upon the square rule.
  • the locking devices can also consist of a ring rotating at the base plate, above which the square rule can be locked against the base plate by means of a thread or a wedge surface.
  • This ring can rest between the base plate and the handle and be supplied with a radial grip-wing for easier servicing.
  • the ring will be guided centrically at its underside on a ring shoulder of the base plate and brace itself upon it also axially.
  • On its top it has a ring groove with wedge surfaces, in which the guidance shoulder withwedge surfaces on the handle will engage.
  • the handle engages over a central supporting attachment into a ring shoulder at the square rule and is braced against it over a screw. in a releasable manner.
  • the square rule has on its topside'a ring-shaped bulge with a trapezoidal profile, which fits into a corresponding groove of the underside of the base plate as a locking device for the square rule.
  • a cylindrical bearing piece is formed on and concentrically with the ring bulge, which extends into a cylindrical bearing opening of the base plate from below.
  • the invention proposes to arrange between the base plate and the square rule an arresting device, in which the square rule can be locked in several predestined angular distances, which usually amount ot 15 each.
  • the arresting device consists of a notch arrangement in the base plate at a central angle of at least 90 and a latch built into the handle, radially movable by a push button, which can be inserted formlocking into the notch arrangment by a spring element.
  • the invention provides in the square rule a wedge shaped groove, and the push button is fitted correspondingly .with wedged shaped guidance surfaces for the radial movement free of play in the groove.
  • the notch arrangement in the sliding piece is equipped with gear profiles, running wedge-like in a radial direction, whereby the latch has corresponding notch flanks.
  • the spring element acts radially as well as axially at the push button.
  • a hatching device is attached to the base plate of the square rule.
  • This hatching device is in an especially useful manner easily detachable, e.g. joined to the base plate by locking means.
  • a simple drawing rule instead of the square rule angularly adjustable in the swivel carriage.
  • square rules and other rules can be exchanged with one another at random.
  • Such a plug-in unit can e.g. be formed from the knobs located at the underside of the swivel carriage, coupled solidly with the handle, which can be locked and wedged into corresponding holes in the ruler or the square rule.
  • a small size drawing board 1 is equipped along its left border edge with a guiding groove 2, in which a drawing rail 3 engages by means of a guiding bar 4 so formlocking that it is aligned parallel with its drawing edge 5.
  • a guiding bar 6 is affixed.
  • a sliding piece 7 is guided parallel movable by sliding through a groove 8 adapted to the profile.
  • FIG. 1 a drawing triangle 9 is provided with holes 10 into which the knobs 11 formed on the sliding piece 7 wedge and fit in such a way that the drawing triangle 9 can be locked quickly and easily with the sliding piece 7, as can be seen from FIG. 3.
  • the groove 8 in sliding piece 7 is on its side which is averted from the drawing edge 5 of the drawing rail 3 provided at the bottom with a beveling 12, which through the pressure of a hand holding the slide piece 7 puts itself on the edge 13 of the guiding bar 6, thereby pulling tightly the touching edge 14 of the drawing triangle 9 to the drawing edge 5 of the drawing rail 3.
  • a precise alignment of the drawing triangle 9 to the drawing rail 3 is accomplished.
  • the sliding piece 7 is equipped with a handle 15 on its topside.
  • drawing triangles 9 cooperating with the drawing rail 3 frequently have to be brought in contact with various side edges on the drawing edge 5 of the drawing rail 3, it is of advantage to coordinate to each of its side edges holes 10, in which they can be locked whenever necessary with the sliding piece 7.
  • FIG. 4 in conjunction with the drawing rail 3 running parallel on a small size drawing board 1 (FIG. 1) instead of a drawing triangle 9 also any other kind of a drawing or writing pattern can be used, iflike the drawing triangle 9 it is equipped with means which allow a detachable coupling with the sliding piece 7.
  • FIG. 4 Another possibility for the perfection of an additional drawing device guided parallel along the drawing rail 3 by means of a sliding piece can be seen in FIG. 4.
  • a square rule 16 is being used, which preferably consists of a transparent material and has two sides, provided with two straight drawing edges 17 running at right angles to each other.
  • the square rule 16 is built in one piece and has at its normally vertical side also an edge 18 inclining under 45 and an edge 19 inclining under 75.
  • This square rule 16 is coordinated to a sliding piece 20 which, according to FIGS. 5 and 6 can be shifted exactly parallel by means of a groove 21 on a guiding bar 22 of the drawing rail 3.
  • a groove 21 on a guiding bar 22 of the drawing rail 3 In order to obtain the exact guidance the side surfaces 23 of the groove 21 are thereby beveled towards the base of the groove, whereby these bevelings are cooperating with the free length edges of the guiding bar 22.
  • the sliding piece 20 forms a swivel carriage for the square rule 16 and for this purpose is provided with a hole 24, conically widening downwards, of a relatively large diameter.
  • a correspondingly conically shaped attachment 25 at the square rule 16 cooperates, which can be so formed in one piece or fastened later to the square rule 16 in such a way that in the basic position of the square rule 16 its horizontal side lies with its border edge, which is averted from the horizontal drawing edge 17 on the drawing edge of the drawing rail 3 (FIG. 4).
  • This edge of the horizontal square side passes over a quarter sector, concentric with the attachment 25, into the drawing edge 17 of the vertical square side. This makes it possible to swing the square rule 16 with its attachment 25 formlocking in the hole 24 of the sliding piece 20 serving as a swivel carriage.
  • the swinging of the square rule 16 is accomplished in a simple manner thereby the attachment 25 is extended to a handle 26, preferably grooved at its contour in form of a rotary knob, which protrudes far enough upwards from the hole 24 of the sliding piece 20. If the conicalness of the hole 24 and the coordinated attachment 25 amounts to between 2 and 10, then aside from the exact positioning also a wedging effect is reached, by which the square rule can be fastened in any desired swivel position to the sliding piece 20. Thereby a slight swinging of the square rule 16 in the sliding piece 20 in any desired position of the rule is made possible after first the wedging effect between the hole-wall 24 and the attachment 25 has been eliminated by exerting pressure on the handle 26.
  • the square rule by means of its graduation in relation to the adjusting mark 28 on the sliding piece 20, has been placed in the desired swivel position, only by slight finger pressure on the sliding piece 20 the wedge effect is to be restored, to lock the square rule 16 anew in relation to the sliding piece 20.
  • the graduation 27 provided on the square rule 16 extends over an arc of and on the sliding piece a tongue 29 is placed, which is provided with the adjustment marking 28.
  • FIG. 7 shows, the wedge effect between the conical hole 24, the sliding piece 20 and the corresponding conical attachment 25 on the square rule 16 can also be accomplished in a different manner from the one described before, and also be loosened again.
  • a turnable ring 30 is placed on the sliding piece 20, which shows at its outer contour a corrugation 31.
  • Small bolts 32 which are driven in at least three places from outside into a concentric annular groove in the ring 30, secure the latter against axial shifting towards the sliding piece 20.
  • the ring 30 On its inner side the ring 30 has a thread 33 or appropriate wedge surfaces, which are in contact with a corresponding thread 34 or adapted wedge surfaces at the service knob 26 of the square rule 16.
  • the conical attachment 25 of the square rule 16 is wedged in the corresponding concial hole 24 of the sliding piece 20, while by turning of the ring 30 in the opposite direction the conical surfaces of the attachment 25 and the hole 24 are being pressed apart axially for the purpose of loosening the wedge effect.
  • the hole 24 in the sliding piece 20 and the attachment 25 on the square rule 16 have a relatively large diameter, to accomplish an exact swivel position as well as a good wedging effect.
  • FIGS. 8 to 10 Still another development of the swivel position of the square rule 16 in the sliding piece 20 is to be seen from FIGS. 8 to 10.
  • the sliding piece 20 is guided parallel moving lengthwise by means of a groove 21 on the guidance bar 6 of the drawing rail 3.
  • the sliding piece 20, however, has for the swivel positioning of the square rule 16, a cylindrical hole 35 in which, from below, a cylindrical attachment 36 of the square rule 16, engages.
  • a ring-groove 37, trapezoid-shaped in its profile has been worked into the underside of the sliding piece 20, in which a corresponding trapezoid ringbulge 38 on the square rule 16 engages.
  • a guidance and support shoulder 39 Concentrically with the hole 35 at the topside of the sliding piece 20, a guidance and support shoulder 39 has been constructed, exactly guiding and axially bracing a ring 40, which can be turned to a limited extent.
  • a ring 40 At the top of this ring 40 we find a groove 41 with several axially ascending ring wedge surfaces 42, which cooperate with corresponding ring wedge surfaces 43 on a collar 44 of the service knob 26.
  • the service knob 26 engages solidly with the ring shoulder 46 at the square rule 16 and is detachably braced against it over a screw 47.
  • the square rule 16 By turning of the ring 40 with the aid of a radial gripwing (not shown in the diagram) the square rule 16 can be shifted axially in the direction of its bearing axis towards the sliding piece 20 by means of the wedge surfaces 42 and 43 over the service knob 26.
  • the inclined surfaces of the trapezoid groove 37 in the sliding piece 20 and the trapezoid bulge 38 of the square rule 16 are being braced against each other and thereby effect a wedging of the square 'rule 16 against the sliding piece 20 in each swivel position of the square rule 16.
  • the bearing for the square rule 16 in the sliding piece 20, according to FIGS. 8 to 10, is also equipped with a locking device, by which the square rule 16 can be form locked closed against the sliding piece 20 in several predestined angular distances, which usually amount to each.
  • This locking device consists of a gear tooth system with notches 48 arranged in an arc of 90 on the sliding piece 20, which show an angular distance of 15 each.
  • a latch 50 which can be shifted radially by a push-button 49 in the service knob 26 and can be inserted formlocking into the notches 48 by means of a spring element, such as a bow-shaped flatspring 51.
  • the notches 48 in the sliding piece are equipped with flanks 52 arranged wedgelike in radial direction.
  • the part of the push-button 49 bearing the latch 50 is also tapered wedge shaped downward and sits in a corresponding wedge shaped groove in the square rule 16 (FIG. 9).
  • the pushbutton 49 receives a formlocking radial guidance free from play in the square rule 16.
  • the bow shaped flatspring 51 puts the push-button 49 not only radially but also axially under tension to such an effect that the push-button 49 gets into formlocking engagement with the wedge shaped groove in the square rule 16, as does the latch 50 with the flanks 52 of the notches 48.
  • the push-button 49 gets into formlocking engagement with the wedge shaped groove in the square rule 16, as does the latch 50 with the flanks 52 of the notches 48.
  • a hatching device is attached to the sliding piece 20.
  • Its case 53 is in its construction and material somewhat elastic. By pressing together the case 53 lengthwise, the barbs 54 can be locked into the slightly narrower break through opening 55 of the sliding piece 20, whereby the hatching device is held to the sliding piece and can be easily exchanged.
  • an actuating lever 56 is swingable around the bearing 57.
  • a step-lever 58 is adapted, which in the shape of a curve engages with a wedging effect with the guidance bar 6 of the drawing rail 3.
  • the flat spring 59 lifts the actuating lever 56 with the step lever 58 each time for renewed activation back to its original position.
  • the small size drawing board 1 can be equipped along all its edges with bars for the guiding of slide rules.
  • the latter can be equipped with so-called drawing heads of different designs, whereby the simplest construction only has a swivel and wedging carriage, which can be activated simply by finger pressure, whereas the most expensive form of construction shows beside the wedging arrest of the square rule through threads or multiple pairs of wedges also a locking device for a formlocking fixation of certain preferred squares.
  • drawing heads of different designs
  • the most expensive form of construction shows beside the wedging arrest of the square rule through threads or multiple pairs of wedges also a locking device for a formlocking fixation of certain preferred squares.
  • the surfaces of the swivel carriages are constructed relatively large in order to guarantee, in spite of the simplest construction, a permanently precise method of operation.
  • the swingable square rule with lockable drawing head as it is proposed for the line up with the small size drawing board, can be outfitted instead of the spring, activating the locking device, with magnet gear to trigger the locking movements.
  • a drafting instrument comprising a. a drawing device
  • a connecting means between the sliding piece and the drawing device the connecting means being adaptable to alternative selective placement in a first state wherein the sliding piece and the drawing device are movable with respect to one another, and a second state wherein the sliding piece and the drawing device are held rigid with respect to one another
  • the connecting means including a hole (24), a peripheral flange about the hole, a threaded, turntable ring (30) rotatably and concentrically mounted on the flange, holding means for preventing axial movement of the ring with respect to the hole, a threaded, service knob (26) engageable by the threads of the ring to draw the knob through the hole, and an abutment connected to one end of the knob to prevent the knob from passing through the hole and when the abutment is drawn adjacent the hole, to prevent rotation of the knob with respect to the hole.
  • a small size drawing board system comprising,
  • a sliding piece which is provided with a hatching device including a case (53) mounted on the sliding piece, an actuating lever (56) swingably mounted in the case, and a step-lever (58) swingably mounted on the actuating lever and selectively engageable with the V-shaped groove to cause motion of the sliding piece longitudinally of the groove when the actuating lever is operated,
  • a small size drawing board system comprising:
  • a drawing rail (3) having a straight drawing edge a first connecting means between the board and the drawing rail to restrict the drawing rail to linear, non-rotational movement with respect to the board,
  • a sliding piece e. a second connecting means between the sliding piece and the drawing rail to restrict the sliding piece to linear, non-rotational movement with respect to the drawing rail, parallel to the drawing edge,
  • a third connecting means between the sliding piece and the drawing device the third connecting means being adaptable to selective placement in a first state in which the sliding piece and the draw ing device are movable with respect to one another, and a second state in which the sliding piece and the drawing device are held rigid with respect to one another
  • the third connecting means including concentric conical surface on the sliding piece I and on the drawing device, said concial surfaces being oriented for unobstructed axial movement except for surface contact with respect to one another, said surface contact resulting in a frictional engagement between the surfaces, said frictional engagement stopping axial rotation between the surfaces and resulting in the second state
  • the rail being provided with a groove and the sliding piece being provided with a hatching device including a case (53) mounted on the sliding piece, an actuating lever (56) swingably mounted in the case, and a step-lever (58) swingably mounted on the actuating lever and selectively engageable with the groove to cause motion of the sliding piece longitudinally of the groove when the actuating lever is operated.
  • a drafting instrument comprising:
  • a connecting means between the sliding piece and the drawing device the connecting means being adaptable to alternative selective placement in a first state in which the sliding piece and the drawing device are movable with respect to one another and in a second state in which the sliding piece and the drawing device are held rigidly with respect to one another
  • the connecting means including a wedge-shaped groove in the sliding piece, a wedgeshaped groove in the drawing device orientated approximately perpendicularly to the first groove, and a latch having wedge-shaped portions mating closely with both of said grooves, the latch, when the means is in its first state, being biased inwardly into each of the grooves and, when the means is in its second state, being disengaged from the least one of the grooves.
US280270A 1971-08-16 1972-08-14 Drawing board Expired - Lifetime US3866326A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19712140903 DE2140903C3 (de) 1971-08-16 Zeichenkopf für Zeichenmaschinen, Zeichenplatten und Reißbretter
DE19722205621 DE2205621A1 (de) 1972-02-07 1972-02-07 Geradefuehrungseinrichtung fuer zeichendreiecke, schrift- und zeichenschablonen, stellwinkel oder dergleichen an zeichenschienen

Publications (1)

Publication Number Publication Date
US3866326A true US3866326A (en) 1975-02-18

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ID=25761605

Family Applications (1)

Application Number Title Priority Date Filing Date
US280270A Expired - Lifetime US3866326A (en) 1971-08-16 1972-08-14 Drawing board

Country Status (5)

Country Link
US (1) US3866326A (enrdf_load_stackoverflow)
JP (1) JPS4829525A (enrdf_load_stackoverflow)
CH (1) CH545700A (enrdf_load_stackoverflow)
FR (1) FR2149503B3 (enrdf_load_stackoverflow)
NL (1) NL7211165A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518918C1 (de) * 1985-05-25 1986-09-04 Fa. J.S. Staedtler, 8500 Nürnberg Zeichenkopf
US4934061A (en) * 1986-04-03 1990-06-19 Jonathan Knight Draughting tables, drawing boards, drawing instruments and analogous apparatus
US6536125B2 (en) * 2000-02-18 2003-03-25 Leo Klapperich Measuring and shifting square
US7895760B1 (en) * 2006-12-06 2011-03-01 Bareis Kathryn M Universal design sheet material holder assembly

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US670677A (en) * 1900-07-31 1901-03-26 Duane J Kelsey Draftsman's protractor.
US795145A (en) * 1905-01-03 1905-07-18 Albert C Loomis Draftsman's triangle.
US1064222A (en) * 1912-06-10 1913-06-10 Luther M Carmical Combined parallel ruler, section-liner, and protractor.
US1975648A (en) * 1930-09-22 1934-10-02 Sterling Tool Company Drafting instrument
US2052904A (en) * 1934-09-03 1936-09-01 Firm Albert Nestler A G Drawing machine
US2501296A (en) * 1947-05-08 1950-03-21 Tyler Charles Drawing board and tau-square combination
US2791838A (en) * 1955-03-22 1957-05-14 Richter Ernst Draftsman's spacing device
US3508336A (en) * 1968-12-05 1970-04-28 Hughes Owens Co Ltd Drafting machine head
US3589016A (en) * 1967-11-20 1971-06-29 Walter Hebel Drawing apparatus
US3667126A (en) * 1968-11-29 1972-06-06 Kuhlmann Kg Franz Device for locking a rotatable drawing head

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US670677A (en) * 1900-07-31 1901-03-26 Duane J Kelsey Draftsman's protractor.
US795145A (en) * 1905-01-03 1905-07-18 Albert C Loomis Draftsman's triangle.
US1064222A (en) * 1912-06-10 1913-06-10 Luther M Carmical Combined parallel ruler, section-liner, and protractor.
US1975648A (en) * 1930-09-22 1934-10-02 Sterling Tool Company Drafting instrument
US2052904A (en) * 1934-09-03 1936-09-01 Firm Albert Nestler A G Drawing machine
US2501296A (en) * 1947-05-08 1950-03-21 Tyler Charles Drawing board and tau-square combination
US2791838A (en) * 1955-03-22 1957-05-14 Richter Ernst Draftsman's spacing device
US3589016A (en) * 1967-11-20 1971-06-29 Walter Hebel Drawing apparatus
US3667126A (en) * 1968-11-29 1972-06-06 Kuhlmann Kg Franz Device for locking a rotatable drawing head
US3508336A (en) * 1968-12-05 1970-04-28 Hughes Owens Co Ltd Drafting machine head

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518918C1 (de) * 1985-05-25 1986-09-04 Fa. J.S. Staedtler, 8500 Nürnberg Zeichenkopf
US4934061A (en) * 1986-04-03 1990-06-19 Jonathan Knight Draughting tables, drawing boards, drawing instruments and analogous apparatus
US6536125B2 (en) * 2000-02-18 2003-03-25 Leo Klapperich Measuring and shifting square
US7895760B1 (en) * 2006-12-06 2011-03-01 Bareis Kathryn M Universal design sheet material holder assembly

Also Published As

Publication number Publication date
JPS4829525A (enrdf_load_stackoverflow) 1973-04-19
FR2149503B3 (enrdf_load_stackoverflow) 1975-08-01
CH545700A (enrdf_load_stackoverflow) 1974-02-15
FR2149503A1 (enrdf_load_stackoverflow) 1973-03-30
NL7211165A (enrdf_load_stackoverflow) 1973-02-20

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