US3703768A - Drawing head for use in drawing devices - Google Patents

Drawing head for use in drawing devices Download PDF

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Publication number
US3703768A
US3703768A US86801A US3703768DA US3703768A US 3703768 A US3703768 A US 3703768A US 86801 A US86801 A US 86801A US 3703768D A US3703768D A US 3703768DA US 3703768 A US3703768 A US 3703768A
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US
United States
Prior art keywords
flat member
axle
square
head
drawing head
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
US86801A
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English (en)
Inventor
Evgeny Mikhailovich Perminov
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.)
MI O Z SP K
MINSKY OPYTNY ZAVOD SPETSIALNOGO KONSTRUKTORSKOGO
Original Assignee
MI O Z SP K
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 MI O Z SP K filed Critical MI O Z SP K
Application granted granted Critical
Publication of US3703768A publication Critical patent/US3703768A/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

  • One of the members is fixed relative to the other member by means -.of spherical bodies disposed therebetween.
  • the position of the square with the drawing scales is fixed on the drawing head at angles divisible by the pitch of a dividing disc which, in the drawing head underdescription, is essentially the second flat member. 7
  • the main object of the present invention is to provide a drawing head for use in drawing devices, in which the square is associated with the second fiat member in such a manner. that any angular position thereof relative to the first flat member is always fixed in spherical bodies.
  • the friction clamp is expedient to make the friction clamp as a screw with a lever mounted in a threaded hole provided in the butt end of the axle.
  • This embodiment of the friction clamp is simple in design and convenient in use.
  • the present drawing head allows the square connected with the drawing scales to be fixed at any predetermined angle by means of spherical bodies, thus resulting in a more accurate operation of the device.
  • FIG. 1 is a front view of the drawing head
  • FIG. 2 is a section taken along line Il-lI of FIG. 1 the view looking in the direction of the arrows and being on an enlarged view; 1 I
  • FIG. 3 is a section taken along line III-III of FIG. 2, the view looking in the direction of the arrow;
  • FIG. 4 is a rear view of the drawing head.
  • a drawing head 1 (FIG. 1) is mounted on a bracket 2 connected with a device 3 for moving the head 1 in the plane of the drafting board (not shown in the drawing), and such device in this particular case in a carriage moving along a guide 4.
  • the bracket 2 is integral with a first flat-member 5 (FIG. 2).
  • the flat member has a hole provided with a bushing 6 therein and rigidly connected-therewith and an axle 7 passes through the bushing.
  • spherical bodies 8 such as balls are'disposed in the first flat member 5.
  • a second flat member 9 Securely fixed on the axle 7 is a second flat member 9 which is essentially adividing disc'of the drawing head 1.
  • the surface of the disc 9 is provided with an annular shaped groove formed by a continuous row of recesses 10 disposed with respect to the center of the axle 7 at the same radius as the balls 8 of the first flat member.
  • the angle between two adjacent recesses 10 is divisible by 5.
  • a casing 13 is secured in the upper portion of the axle 7 by means of a chuck 11 provided with a nut 12, with the casing accomodating a means used for turning the second flat member 9 relative to the first flat member.
  • Such turning means comprises two washers 14, 15 disposed on the bushing 6 with one washer being located above the other washer.
  • the washer 14 is loosely fitted onto the bushing 6 and rest upon pushers 16 such as balls 17. lodged in holes in the first flat member 5.
  • the washer 15 is mounted stationarily in the axial direction, and positioned between the washers 14 and 15 is a lever 18 acting upon the washer 14 in the course of its interaction with a spring-loaded clamp 19.
  • the lever 18 is fashioned as a clamp whose ends 20 (FIG. 3) are disposed in slots 21 in the washer 15.
  • the spring-loaded clamp 19 is essentially a wedge 22 (FIG. 2) which is movable in the transverse direction relative to the axle 7.
  • the wedge is rigidly connected with a button 23 protruding from the side of the casing 13 to the exterior thereof.
  • a slot 24 is provided to permit the button 23 to pass into the casing 13.
  • the wedge 22 is spring-loaded and rests upon an insert 25.
  • Loosely mounted on the end portion of the axle 7 is a square 26 connected with drawing scales 27 (FIGS. 1, 4).
  • the position of the square 26 relative to the second flat member 9 is fixed by means of a friction clamp which is essentially a screw 28 (FIGS. 2, 4) which is threaded into a threaded hole in the butt end of the axle 7.
  • a friction clamp which is essentially a screw 28 (FIGS. 2, 4) which is threaded into a threaded hole in the butt end of the axle 7.
  • the screw is provided with a lever 29 whose free end protrudes to the exterior of the first flat member 5.
  • the friction clamp can be fashioned as a nut provided with a lever, threaded onto a screw at the end of the axle.
  • the free disposition of the square 26 on the axle 7 makes it possible to turn the square relative to the second flat member 9, which, as above mentioned is essentially a dividing disc, through any angle, including those angles which are not divisible by the pitch of the dividing disc.
  • the square 26 has a stop 30 rigidly fixed thereon, and the dividing disc 9 has a hole 31 provided therein for accomodating the stop.
  • the stop 30 is capable of displacing in the hole 31 through an angle equal to 730.
  • the drawing head for use in drawing devices operates as follows:
  • the square 26 with the drawing scales 27 is oriented with respect to the dividing disc 9 with the aid of the stop 30 which is pressed in the clockwise direction against the wall of the hole 31, with the screw 28 being tightened.
  • the drawing scales are turned through a predetermined angle divisible by the pitch of the dividing disc in the following manner:
  • the square 26, which is in its initial position, is released by turning the screw 28 by the lever 29, so that it can freely turn on the axle 7 relative to the dividing disc 9.
  • the square 26 is positioned at an angle of 6 and is fixed in this position by tightening the screw 28. Then, by using the pitch of the dividing disc 9, it possible to turn the square 26 in the above-described way through the angles of 1 1, 16, 21, etc.
  • the present drawing head for use in drawing devices provides for a rigid positioning of the drawing scales at any angle divisible by 230. This positioning is effected in the following way: the screw 28 is released.
  • Position of the drawing scales on the drawing head will always correspond to an angular value divisible by 2 l iie scales are transferred from such an angle to another angle, for example, 1230, 2730, by also using the pitch of the dividing disc 9 and with the aid of the button 23.
  • the drawing scales can be positioned at any angle and constantly fixed against self-tuming by means of spherical bodies.
  • a drawing head for use in drawing devices having a means for moving the drawing head in the plane of a drafting board, comprising an axle, a first flat member mounted on said axle and associated with the means for moving the head in the plane of the drafting board; a second flat member securely fixed on said axle under said first member, a means for turning said second flat member relative to said first flat member; a square carrying drawing scales, said squares being loosely mounted on said axle under said second flat member; and a friction clamp connecting said square with said second flat member, said friction clamp being disposed at the end of said axle.
  • a drawing head for use in drawing devices having a means for moving the drawing head in the plane of a drafting board, comprising an axle; a first flat member mounted on said axle and associated with the means for moving the head in the plate of the drafting board; a second fiat member securely fixed on said axle under said first member; a means for turning said second flat member relative to said first flat member; a square carrying drawing scales; said square being loosely mounted on said aide under said second flat member; a friction clamp connecting said square with said second flat member, said friction clamp being disposed at the end of said axle, a stop secured on the square, and a hole for accomodating said stop provided in the second flat member, with said hold limiting the turning of the square relative to the second flat member from a position divisible by 5 into a position divisible by 230.
US86801A 1970-02-24 1970-11-04 Drawing head for use in drawing devices Expired - Lifetime US3703768A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1400963A SU319177A1 (ru) 1970-02-24 1970-02-24 Делительна головка дл чертежных приборов

Publications (1)

Publication Number Publication Date
US3703768A true US3703768A (en) 1972-11-28

Family

ID=20449785

Family Applications (1)

Application Number Title Priority Date Filing Date
US86801A Expired - Lifetime US3703768A (en) 1970-02-24 1970-11-04 Drawing head for use in drawing devices

Country Status (7)

Country Link
US (1) US3703768A (fr)
BE (1) BE758624A (fr)
DE (1) DE2058495A1 (fr)
FR (1) FR2073640A5 (fr)
GB (1) GB1281868A (fr)
SE (1) SE381005B (fr)
SU (1) SU319177A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100340805C (zh) * 2005-08-29 2007-10-03 浙江宝龙阀门制造有限公司 双楔式单蝶板三通蝶阀
CN114050507A (zh) * 2021-11-25 2022-02-15 广西电网有限责任公司钦州供电局 一种用于分裂导线的双线钩

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE817102C (de) * 1948-10-02 1951-10-15 Viktor Dr-Ing E H Graf Zeichenkopf
GB754445A (en) * 1954-01-26 1956-08-08 Philip James Roff Improvements relating to drawing apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE817102C (de) * 1948-10-02 1951-10-15 Viktor Dr-Ing E H Graf Zeichenkopf
GB754445A (en) * 1954-01-26 1956-08-08 Philip James Roff Improvements relating to drawing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100340805C (zh) * 2005-08-29 2007-10-03 浙江宝龙阀门制造有限公司 双楔式单蝶板三通蝶阀
CN114050507A (zh) * 2021-11-25 2022-02-15 广西电网有限责任公司钦州供电局 一种用于分裂导线的双线钩

Also Published As

Publication number Publication date
SU319177A1 (ru) 1976-05-25
GB1281868A (en) 1972-07-19
SE381005B (sv) 1975-11-24
FR2073640A5 (fr) 1971-10-01
BE758624A (fr) 1971-05-06
DE2058495A1 (de) 1971-09-09

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