Circular
Work in Carpentry and Joinery
by George Collings
Softcover
215 x 280mm
126pp
Published
by Linden Publishing, Fresno CA, USA
Originally published London 1886. Reprinted
with additional 1992.
R.R.P.$37.90
ISBN 0-941936-48-1
Extract from back cover of book:
Here is a grand survey of circular work of both single and double curvature. Written by George Collings, a master carpenter who first began writing in late nineteenth century England, the original text is reproduced here unaltered. New material and extensive annotations easily enable today's craftsmen to grasp the more intricate aspects of the subject. Over 240 new illustrations complement the annotations.
Much of the knowledge that Collings compiled over one hundred years ago has been lost to the contemporary carpenter. The practices and techniques went out of the trade and were not passed down through apprenticeship programs. Now that knowledge, preserved and expanded upon, is once again available to all those engaged in complex joinery.
Drawings: Black & White
Units of Measurement: Imperial
Contents
Introduction
Circular Work defined
Simple Circular Work defined
Example of ditto
Bull's-eye
Frame
Gothic-headed ditto
Wall Plates, Ridge, and Purlins
Segmental-headed
Frame
Semi-circular Frame
Bull's-eye Frame
Semi-elliptical Frame
Equilateral
Gothic Frame
Lancet-headed Frame
Drop-arch head
Four-centred Gothic head
Thought
and Practice required for this Work
Adjusting Work by the Eye
Use of Machines
in Circular Work
Work of Single Curvature
Work of Double Curvature
Difference
between Simple and Complex Circular Work
Examples of Double Curvature
Part
I. Circular Work of Simple or Single Curvature
Solid-headed Frames
Segment-headed
Frame
To find the Radius by Calculation
To find the Radius Graphically
When
a Number of Heads are Required
Getting out Top rails of Doors
Semicircular
Solid-headed Frame
Semicircular in Thicknesses
Semicircular with a Fanlight
Elliptical
Heads
Semi-elliptical-headed Frames
Methods of drawing an Ellipse
Methods
of drawing an Ellipse
Example of Elliptical Arch
Another Method of drawing
an Ellipse
Method of Ordinates
Ellipse formed of Circular Arcs
Ellipse
when both Diameters are given
Mould for lining out the Elliptical Head
To
Construct the Cylinder for the Veneer
To find the Shape of the Veneer for
ditto
To find the Shape of the Veneer by Geometry
Bull's-eye Frames
Bull's
eye Frame with Sash hung on Centres
Bull's-eye Frame Louvred
Shape of Louvre
Ends
To find Mould for Louvres, etc
Application of Mould to ditto
Gothic-headed
Frames
Gothic Frames for Doors and Windows
Equilateral Frames for Doors
and Windows
Lancet Frames for Doors and Windows
Lancet Frames for Doors
and Windows
Drop Arch Frames for Doors and Windows
Four-centred Gothic-headed
Frame
Four-centred Gothic-headed Frame
Four-centred Gothic-headed Frame
Four-centred
Gothic-headed Frame
Cased Frames
Segmental-headed
Cased Frames
Circular on Plan and Square-headed Cased Frame
Semicircular-headed
Cased Frame, square inside
Semicircular-headed Cased Frame, circular inside
Linings
of ditto
Linings for Stopping Plaster
Splayed for Stopping Plaster
Geometrical
Method of getting out Linings
Apparatus for Bending Bars, etc
Intersection
Of Circular And Straight Mouldings, Easing-angles, Etc
To find the Mitre
of Circular and Straight Moulding of like Section
Line Perpendicular to Circle
To
draw Perpendicular to Circle
To find Section of Circular Moulding when Mitre
is Straight
Ditto Raking Circular Cornice
Easing Angles
Easing Angles
first method.
Easing Angles second method.
Circular Angle Brackets And
Hip Rafters
Angle Brackets or Ribs
Circular Hip Rafters
To find Angle
Bracket in a Rectangular Room
Lining Edges of Brackets for Beveling
To
find Angle Bracket when one of the Walls is a Convex Curve
To find Section
for the Mould
To find Angle Bracket for Concave Wall
Angle Bracket to Elliptical
Cove
To find Circular Hip Rafter.
Backing for Hip Rafter
Backing for
Hip Rafter
To find Hip when the Curve is Flat
To find Hip in a Pyramidal
Roof with Curved Sides
To find the Covering for one Side of ditto
To find
the Curvature and Backing of Hip in an Ogee Octagonal Roof
To find the Covering
of an Ogee Roof.
Domes
Apsidal Roofs
Part
II Complex Circular Work or Work of Double Curvature
Remarks on Methods of
executing Work of Double Curvature
A Practised Eye essential
A Knowledge
of Geometry necessary
Solid Heads of Double Curvature
Lines to be used in
setting out ditto
General Observations on ditto
Number of Pieces used in
Framing ditto
To Construct a Solid Semicircular Head, Circular on Plan
To
find a Mould for Lining out the Pieces in ditto
Jointing the Pieces in ditto
Working
the Outer Side to the Convex Curve in ditto
To Describe the Semicircle on ditto
To
Work the Under Side of the Head
Remaining Operations to finish Squaring up
ditto
Framing a Cased Circular Head, Circular on Plan
To Work the Opposite
Sides of a Piece to a Circular Shape
Mode of Construction of Sash-frame Head
Construction
of Mould for Lining out
Application of Mould
Application of Foregoing Principles
to the Construction of Sash-frame Head, etc
To
find Mould for Top Rail of Sash
To Line out the Sash-rail
Working and Fitting
the other parts of Sash and Frame
Getting out Curved Sash Bars
Linings for
Stopping Plaster
To find Shape of Veneer for Splayed Linings
Conical
Roofs And Skylights
Conical Roofs
Rails for ditto
Mould for ditto
Quantity
of Stuff Required in Conical Roofs
Getting out the Mould by a more economical
Method
Section of a Cone by a Perpendicular to one Side
Form of Rails for
Skylights
Practical Application of Foregoing Methods
Finding the Curve for
the Mould
Finding the Curve by another Method
Curving the Edges of the Rails
Making
a Section of Roof for finding the Moulds
To find Moulds for Top and Bottom
Rails of Conical Skylight
To find the places of the Rails in ditto
To Construct
Mould for Bottom Rail
To Construct Mould for Top Rail
To Line the edges
of ditto
To Construct a Mould for lowermost edge
Bottom Rail
Framing
the Rails to the Styles
Covering of Conical Roofs, Domes, etc
To find the
Covering Boards for a Semi-conical Roof
To find the Covering Boards for a Segmental
Dome
To find the Covering Boards for a Semicircular Dome
To find the Covering
Boards for a Spheroidal Dome
To find Covering for an Ogee Dome of Circular
plan
To find Covering for a Spherical Vault
To find Radii of Curved Edges
of the Boards
o Lay down the Covering Boards of a Flat Surface