The New Spruce Forge Manual of Locksmithing: A Blacksmith’s Guide to Simple Lock Mechanisms

More documents

Recommendations

Info

1/2” x 1/2” Grid (13 mm) Additional grid lines can be added to help estimate location of points The grid patterns are a made up of a series of reference lines that cross each other. The scale of the grid will be on the drawing. To translate these plans into full scale patterns you must first create a full-scale grid to use as a reference. Using this grid, you can then plot the location of all the points that intersect the grid and finally connect all those points to create the pattern. Using the Patterns to Cut Out the Sheet Metal Parts Using saws and cold chisels to cut away unwanted pieces from a sheet metal part was the only technology available to the medieval smith. It is a lot more labor intensive than using a metal cutting bandsaw for long straight cuts, however chisels can be used to work in much smaller spaces. In many cases they are still the only technology available to the average smith. The simplest method of transferring the pattern to a workpiece is to use spray adhesive to glue a photocopy of the pattern to the stock to be cut out. The first step in the process is to use a center punch to mark the endpoints of all reference lines and any hole locations on the pattern. 52
Next, place the pattern piece on an anvil and begin cutting the outline of the pattern piece into the surface of the metal. A narrow cold chisel is used to lightly score a groove along the edge of the pattern piece. The chisel is driven directly into the face of the sheet metal. Move the chisel over slightly and drive the chisel into the plate at that location. Continue this process until the entire line has a groove that is approximately half the thickness of the metal. This sharp groove creates a stress point that will greatly weaken the metal and force it to break along that line. The waste piece of metal can now be broken away from the pattern piece. Pattern pieces with straight lines can be taken directly to the vise, and the waste piece flexed back and forth until it breaks away. It is usually easier to start on one side of the line and work the crack over to the other side. For curved lines, the waste piece may need to be cut into sections first. A series of pieces with slightly curved lines will be easier to flex than a single piece that follows a longer curved line. A hacksaw is used to saw the waste into manageable pieces. 53
Page 2 and 3: SECTION I - Technical Information -
Page 4 and 5: VERNIER CALIPERS: These are the ine
Page 6 and 7: Tools for Precision Work LIGHTING:
Page 8 and 9: Blacksmithing and Benchwork Introdu
Page 10 and 11: TONGS Tongs are long handled pliers
Page 12 and 13: More hammering will create more ful
Page 14 and 15: Planishing Planishing is refining t
Page 16 and 17: It is important to use the right si
Page 18 and 19: The sequence of colors above will a
Page 20 and 21: Filing Files are used to remove met
Page 22 and 23: Metal parts that need to have the f
Page 24 and 25: The hatchet stake is often used to
Page 28 and 29: The pipe lock is a fine example of
Page 30 and 31: Use a 1/2”(13mm) square bar to si
Page 32 and 33: The bolt head is used as a drift th
Page 34 and 35: Lock Body Pattern 19.3 deg. 7-5/8
Page 36 and 37: File away the taper from the outsid
Page 38 and 39: Cross peen the end of the shackle t
Page 40 and 41: Cut the small washer from the bar.
Page 42 and 43: 1-1/2” (38 mm) 1/8” (3 mm) Hatc
Page 44 and 45: Place the spring back on the spring
Page 46 and 47: [4] Classic Medieval Spring Padlock
Page 48 and 49: This is another common form of spri
Page 50 and 51: This padlock has a very elaborate r
Page 52 and 53: 1/8” (3 mm) spacer keeps springs
Page 54 and 55: Cover Plate 5/16” (8 mm) 7/16”
Page 56 and 57: 3/16” dia. (5 mm) 3/4” (19 mm)
Page 58 and 59: Backplate 1 Bend allowance 1/16”
Page 60 and 61: Lay the latches in position on the
Page 62 and 63: Place the bolt on the backplate in
Page 64 and 65: The medieval spring lock is similar
Page 66 and 67: 3/4” (19 mm) Slide the two levers
Page 68 and 69: [9] Door Lock Key Backplate Bolt Fr
Page 70 and 71: Place the ward box on the backplate
Page 72 and 73: [11] Classic Rim Lock Side panel Ke
Page 74 and 75: Cover Plate & Ward Box 4-3/4” (12
Page 76 and 77:
1/4” (6 mm) 3/16” (5 mm) 3/16
Page 78 and 79:
[12] Classic Lever Lock Cover plate
Page 80 and 81:
Use the key to move the bolt from t
Page 82 and 83:
Cut the handle from the bar. Place
Page 84 and 85:
[14] Basic Padlock Shackle Backplat
Page 86 and 87:
Bend the tail of the tumbler so tha
show all

The New Spruce Forge Manual of Locksmithing: A Blacksmith’s Guide to Simple Lock Mechanisms

Create successful ePaper yourself

Delete template?

Save as template?