US3200774A - Drafting appliance - Google Patents

Drafting appliance Download PDF

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Publication number
US3200774A
US3200774A US259278A US25927863A US3200774A US 3200774 A US3200774 A US 3200774A US 259278 A US259278 A US 259278A US 25927863 A US25927863 A US 25927863A US 3200774 A US3200774 A US 3200774A
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US
United States
Prior art keywords
casing
rails
drawing board
shaft
motor
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
US259278A
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English (en)
Inventor
Suter Erwin
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Individual
Original Assignee
Individual
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Filing date
Publication date
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Publication of US3200774A publication Critical patent/US3200774A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B27/00—Drawing desks or tables; Carriers for drawing-boards
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B27/00—Drawing desks or tables; Carriers for drawing-boards
    • A47B27/02—Adjustable drawing tables without balancing means

Definitions

  • This invention relates to a draftin table appliance with a device for altering the position of a drawing board relative to its stationary support.
  • the object underlying the invention is to provide easy and quick readjustment of the drawing board, that is inclining and lifting or lowering. Readjustment shall take place without requiring any appreciable effort, and the means necessary for readjustment shall take up a small space and be conveniently adapted in appearance to a drafting appliance which always essentially consists of a base, a drawing board and a drafting machine, such as a parallelogram guide, for example.
  • the drafting appliance is characterized in that the device, comprises at least one motor and two motor-driven shafts, surrounded by a casing, secondary drives serving for inclining and displacing the drawing board.
  • the casing has attached thereto guide rails for the motordriven displacement of the drawing board, and the motordriven casing may be swivelled about a stationary support in order to incline or tilt the drawing board.
  • FIG. 1 is a rear view in elevation of the drafting board appliance
  • FIG. 2 is a side View in elevation of the drafting appliance according to F 1G. 1;
  • FIG. 3 is a plan view of the device partly in section for inclining, lifting or lowering the drawing board, as viewed in the direction of the arrow A of FIG. 2;
  • FIG. 4 is a detail view of the inclining mechanism of the device according to FIG. 3;
  • FIG. 5 is a side view of the lifting mechanism, in section taken on the line VV of FIG. 3 in the direction of the arrows;
  • FIG. 6 is a side View partly in section of the lifting mechanism taken on line VIVI of FIG. 3 in the direction of the arrows;
  • FIG. 7 is a top view of the lifting mechanism, partly in section taken on the line Vii-Vii of FIG. 3 in the direction of the arrows;
  • FIG. 8 is a top view partly in section of the guide for the drawing board with respect to the device, taken on the line Vlll-VIIl of FIG. 1 in the direction of the arrows;
  • FIG. 9 is a cross section showing diagrammatically the switching means for the electric motors, taken on the line IXlX of FIG. 3 in the direction of the arrows;
  • FIG. 10 is a detail view of the part B according to FIG. 3 for limiting the inclination of the drawing board;
  • FIG. 11 is a detail view of the part C according to FIG. 3 for limiting the displacement of the drawing board.
  • FIG. 12 is an electric wiring diagram with the switching means according to BIG. 9 for the electric motor according to FIG. 3.
  • the fixed support of the drafting appliance is a pedestal or concrete stand 5.
  • Stand 5 has a yoke 6 rotatably mounted thereon so that a drawing board 7 with its drafting machine l3 canbe rotated about a vertical axis which is the 32%,??4 Patented Aug. ll 7, i965 longitudinal axis of stand 5.
  • the device 9, FIG. 3, for inclining, lifting or lowering the drawing board 7 is secured with its shaft 10 to the yoke 6 by means of pins 11 (FIG. 1).
  • the device 9 includes a box-like casing 4 with two angle-iron rails 12 (FIGS. 1 and 3).
  • channeled rails 13 are mounted on the back of the drawing board and these two rails 13 are interconnected by a channeled rail 14.
  • Rail 14 has also hinged thereto the top end of a rod or rack 15 which protrudes through the casing 4 of device 9 (FIG. 2).
  • Rod 15 is motor-driven into and out of the casing 4 of device 9 in a manner which will be explained, and the casing is turned with respect to its shaft also in a manner to be explained. It is evident that by these two motordriven drives, on the one hand the drawing board 7 is raised and lowered by means of rack 15, rails 14 and i3 and, on the other hand, the drawing board 7 is inclined by means of the rotatable casing i and the rails 12 which are guided in the rails 13. Thus the drawing board is displaced along the rails 12 and 13 and inclined by means of the casing pivotable about shaft 16.
  • the rails 12 are welded to the casing 4.
  • the shaft 10 passes through the casing d.
  • the bearings 16 of the shaft iii are secured on casing 4.
  • Bracket 17 is also bolt or screw connected on rail 12 and has secured thereon an electric motor 19.
  • the pinion of motor 19 drives a wormwheel 2t meshing with a wormwheel 21 (FIGS. 3 and 4) (for the sake of clarity of FIG. 4 has been taken out of FIG. 3 and shown separately).
  • the wormwheel 21 is mounted on a shaft 22 whose wormwheel 23 drives a worm segment 24 (FIGS. 3, 4 and 6) fixed on shaft Hi.
  • the lifting mechanism of the drafting appliance sup ported by bracket 13 includes an electric motor 25 which, in the example, is similar to electric motor 19.
  • the pinion 26 of motor 25 drives a wormwheel Z7 and seated on the same shaft as the wormwheel 27 is a toothed wheel 28 which meshes with a rack 15 (FIGS. 3, 5 and 7).
  • Rack 15 is provided between this toothed wheel 28 and a roller 29 which, with its collar 30, guides the rack 15 and presses the same against the toothed wheel 28.
  • the electric motors H and 25 are reversible, for inclining and displacing the drawing board 7 each in two opposite directions.
  • PEG. 8 illustrates the guide for the rails 12 and i3. Casing 4 with its rails 12 is guided in the channeled rails 13. For this, the two ends of rail 12 (FIG. 1) each carry two of said rollers 31 and 32. Roller 31 lies on the inside of one free leg, and roller 32 likewise on the inside of the other free leg of a profiled rail 13 (FIG. 8).
  • Two shift bars 33, 34 axially immovable, but slightly rotatable, are mounted on rail 14. These shift bars serve for switching the electric motors 1Q, 25 on and off in either direction of rotation.
  • Motor 19 is operated by actuating the shift bar 34, and motor 25 by the shift bar 33 by means of handles 35, 36.
  • the shift bars 33 and 34- are of hexagonal cross-section and slightly rotatable with a rail 37, 3%. Rails 37, 38 are fixed to the casing 4; but they can, however, be swiveled somewhat in either direction about their longitudinal axis, which is also the longitudinal axis of the shift bars 33, 34. During this swiveling movement the rails 37, 38 can actuate contacts 3946 (FIGS. 3, 9 and 12).
  • shift fingers 47, 48 Arranged on casing 4- are two shift fingers 47, 48 (FIGS. 3 and 11). These shift fingers have inclined faces 49, 50.
  • shift bar 33 Provided on shift bar 33 are two dogs 51, 52. If now the drawing board with shift bar 33 is displaced upwards, in the topmost position of the drawing board the dog 52 runs onto face 50 of shift finger 47 and causes the shift bar to swivel clockwise (FIGS. 3 and 11). The shift bar 33 is swiveled so far that the contacts 43, 44 are now actuated, so that motor 25 is reversed at once.
  • the contacts 41, 42 are operated when the shift bar 34 is turned counterclockwise, and the drawing board 7 inclines forward.
  • the cable 53 is wound somewhat around the shaft 10 and the bar 37 is turned clockwise (FIG. 10) so that contacts 39, 40 are now actuated by the bar 37, and the electric motor 19 is reversed.
  • the shift bar 34 has been turned clockwise by hand (FIG.
  • f0 electric motors also at least one hydraulic or pneumatic motor could be provided.
  • the shaft 10 of the device 9 could also be mounted on a fixed support other than stand 5.
  • the shaft may with their ends'be fixed on a table or desk. It is also possible to have the ends of shaft 10 inserted in a wall.
  • Drafting appliance comprising a pedestal support, a yoke rotatably mounted on an upper end of the support, a shaft secured on the yoke, a drawing board having a pair of rails secured on one side of the board in spaced relation, a channel rail interconnecting one of the ends of the said pair of rails, a casing having two rails connected thereto with the casing provided at the approximate other end of the first-mentioned rails and slidable therein by means of the two rails, a rack connected at one end to the channel rail and the other end extending through the casing, a pair of motors mounted in the casing each with connecting means, one to the rack and the other to the shaft for the yoke, and a pair of control means projecting from the casing and each manually operable, one control means to electrically energize one motor and connected to operate the rack to raise or lower the board relative to the support, the other control means to electrically energize the other motor connected to tilt the board in different inclined positions, the pair of
  • Drafting appliance in which means are provided connected to the casing and the shaft to limit the inclining movement of the board and the raising and lowering of the board.

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  • Manipulator (AREA)
  • Transmission Devices (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US259278A 1962-02-19 1963-02-18 Drafting appliance Expired - Lifetime US3200774A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH201262A CH396342A (de) 1962-02-19 1962-02-19 Zeichengerät

Publications (1)

Publication Number Publication Date
US3200774A true US3200774A (en) 1965-08-17

Family

ID=4223830

Family Applications (1)

Application Number Title Priority Date Filing Date
US259278A Expired - Lifetime US3200774A (en) 1962-02-19 1963-02-18 Drafting appliance

Country Status (4)

Country Link
US (1) US3200774A (de)
AT (1) AT250210B (de)
CH (1) CH396342A (de)
GB (1) GB1012395A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10010169B2 (en) 2011-04-02 2018-07-03 Eric Arthur Grotenhuis Computer work desk

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2484749B (en) 2010-10-20 2013-10-23 Frank Michael Ohnesorge Interatomic force measurements using passively drift-compensated non-contact in-situ calibrated atomic force microscopy - quantifying chemical bond forces
CN102894658A (zh) * 2011-07-25 2013-01-30 马红太 可调节的美术课桌

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US543492A (en) * 1895-07-30 laughlin
FR946052A (fr) * 1947-05-02 1949-05-23 Thomas Et Bordenave P Table à dessiner
FR1228604A (fr) * 1958-06-11 1960-08-31 Nestler Ag Albert Perfectionnement aux tables à dessin pourvues d'un dispositif hydraulique pour élever et abaisser la planche à dessin
GB863988A (en) * 1957-12-13 1961-03-29 Mason & Sons Ltd E N Improvements in and relating to drawing boards and stands
US3060624A (en) * 1960-01-15 1962-10-30 Prefina G M B H Drawing table

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US543492A (en) * 1895-07-30 laughlin
FR946052A (fr) * 1947-05-02 1949-05-23 Thomas Et Bordenave P Table à dessiner
GB863988A (en) * 1957-12-13 1961-03-29 Mason & Sons Ltd E N Improvements in and relating to drawing boards and stands
FR1228604A (fr) * 1958-06-11 1960-08-31 Nestler Ag Albert Perfectionnement aux tables à dessin pourvues d'un dispositif hydraulique pour élever et abaisser la planche à dessin
US3060624A (en) * 1960-01-15 1962-10-30 Prefina G M B H Drawing table

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10010169B2 (en) 2011-04-02 2018-07-03 Eric Arthur Grotenhuis Computer work desk

Also Published As

Publication number Publication date
AT250210B (de) 1966-10-25
CH396342A (de) 1965-07-31
GB1012395A (en) 1965-12-08

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