GB104282A - A Mathematical Instrument for the Trisection of a Plane Rectilineal Angle. - Google Patents

A Mathematical Instrument for the Trisection of a Plane Rectilineal Angle.

Info

Publication number
GB104282A
GB104282A GB804316A GB804316A GB104282A GB 104282 A GB104282 A GB 104282A GB 804316 A GB804316 A GB 804316A GB 804316 A GB804316 A GB 804316A GB 104282 A GB104282 A GB 104282A
Authority
GB
United Kingdom
Prior art keywords
angle
bar
circle
instrument
pivot
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
Application number
GB804316A
Inventor
Richard Hodgins
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
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB804316A priority Critical patent/GB104282A/en
Publication of GB104282A publication Critical patent/GB104282A/en
Expired legal-status Critical Current

Links

Landscapes

  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

104,282. Hodgins, R. June 7, 1916. Dividing-instruments.-An instrument for trisecting angles comprises two bars C P, B P free at their ends but pivoted at O and Q to a bar OQ so that O Q = Q P = 0 'B. To trisect an angle- B A C, a circle is drawn through the apex A with centre O so that the radius O A = O Q. Let this circle cut the lines B A, C A respectively at points B, C. The instrument is then placed so that the pivot 0 coincides with the centre of the circle, with the bar B P falling upon the line B A, and with the bar C P passing through the point C. Still observing these conditions, the pivot Q is then moved round the circle until the end P of the bar C P touches the bars B P. The pivot Q will then assume the position shown in the Figure, so that the arc A Q is 1/3 the arc B C. Arcs B D, D E are then cut off equal to arc A Q. Then the lines D A, E A trisect the angle B A C. The Specification contains a mathematical demonstration.
GB804316A 1916-06-07 1916-06-07 A Mathematical Instrument for the Trisection of a Plane Rectilineal Angle. Expired GB104282A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB804316A GB104282A (en) 1916-06-07 1916-06-07 A Mathematical Instrument for the Trisection of a Plane Rectilineal Angle.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB804316A GB104282A (en) 1916-06-07 1916-06-07 A Mathematical Instrument for the Trisection of a Plane Rectilineal Angle.

Publications (1)

Publication Number Publication Date
GB104282A true GB104282A (en) 1917-03-01

Family

ID=32246725

Family Applications (1)

Application Number Title Priority Date Filing Date
GB804316A Expired GB104282A (en) 1916-06-07 1916-06-07 A Mathematical Instrument for the Trisection of a Plane Rectilineal Angle.

Country Status (1)

Country Link
GB (1) GB104282A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0628786A2 (en) * 1993-06-10 1994-12-14 John Y. Izumi Angle trisector
US5894671A (en) * 1996-01-29 1999-04-20 Karapetian; Edgar Compass with angle trisecting capability

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0628786A2 (en) * 1993-06-10 1994-12-14 John Y. Izumi Angle trisector
US5383276A (en) * 1993-06-10 1995-01-24 Izumi; John Y. Angle trisector
EP0628786A3 (en) * 1993-06-10 1995-08-09 John Y Izumi Angle trisector.
US5894671A (en) * 1996-01-29 1999-04-20 Karapetian; Edgar Compass with angle trisecting capability

Similar Documents

Publication Publication Date Title
Johnson Advanced euclidean geometry
GB104282A (en) A Mathematical Instrument for the Trisection of a Plane Rectilineal Angle.
US2603872A (en) Combined fillet and cylinder gauge, caliper, protractor, and compass
US1010612A (en) Mathematical instrument.
US1572237A (en) Scriber clamp and attaching device
US3906638A (en) Angle trisecting device
US1294935A (en) Angle and arc dividing ruler.
Andrica et al. A note on the Nagel and Gergonne points
GB191329804A (en) A Mathematical Instrument for Trisecting Angles.
US1093919A (en) Device for trisecting angles.
US1242467A (en) Geometrical instrument.
US2874476A (en) Draftsman's instrument
GB104839A (en) Improvements in and relating to Measuring Devices.
US1211568A (en) Scale.
US1732073A (en) Drafting instrument
US1182638A (en) Engineer's plotter.
GB191208415A (en) Improvements in Ruling and Drawing Devices.
Lodge Orthogonal Projection
US2009887A (en) Protractor
GB110986A (en) Improvements in or relating to Protractors.
GB326887A (en) Combined ruler and compasses
US1007937A (en) Mathematical instrument.
GB103686A (en) Improvements in Angle Trisecting and Bisecting Instruments.
US411617A (en) Drawing-instrument
GB291015A (en) Improvements in perspective drawing apparatus