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Step 116Appendix
==== Glossary of Terms ====
Camout (or cam-out) is a process by which a screwdriver slips out of the head of a screw being driven once the torque required to turn the screw exceeds a certain amount. Frequently, camout damages the screw, and possibly also the screwdriver, and should normally be avoided. However, the Phillips head screw and screwdriver combination was designed specifically to camout, as at the time of its invention torque sensing automatic screwdrivers did not exist.
Phillips is a trademark used for a screw with a head having two intersecting perpendicular slots and for a screwdriver with a tip shaped to fit into these slots.
Recess refers to the shaped socket into which a driver can be inserted
End-Load is the force required to keep the bit to not camout. Low end-load is usually most desirable.
1-Way refers to a screw that is designed for permanently single use only.
2-Way refers to a screw that is intended to be both inserted and removed, used more than once etc.
History of Screws and Screwdrivers, by Mary Bellis, About.com
Phillips or Pozidriv? Healey Magazine, Feb 1996
Why did this guy Phillips think we needed a new type of screw by Adams, Nov 24 1989
Screw Drive Systems, Wheeling, IL, Hitchcock Publishing, annual.
A New Design of Screw Head by Brian Rooks, Assembly Automation Vol 21-4, 2001
Furniture screws: primitive to gimlet by Fred Taylor, Discover Mid-America - Aug 2007
Robertson Screws by Ricketts
Hands-On: LOX Screws by Chuck Cage
Testing and Understanding Screwdriver Bit Wear. Thesis submitted to Virgiania Polytechnic and State University.
A New Design of Screw Head by Brian Rooks: Assembly Automation, 2001; Vol 21, Issue 4, Page: 329 - 333.
Inspection-6 Lobe Recess.pdf, article by Joe Greenslade found at www.greensladeandcompany.com
A Light Duty Parallelogram T Nut, version 3; by R.G. Sparber
Robertson Screw and Screwdriver - Incredible Inventions - Cool Canada - Library and Archives Canada, Collections Canada.
Phillips Screw Company
Semblex Corporation
S.C.F. Fasteners, Taiwan
Uni-Screw Worldwide, Inc
Tamperproof.com
Seton Security
Quickscrews
Bristol Wrench
Complete FastenersBristol Wrench
Free Patents Online
TTAP Screws
Bryce Fasteners
DIY Security Bits.
Cam Car Solutions
Discussion Forum; Re Phillips vs Square
Helpful Fools / Does Anybody Know?
Electronics Point Discussion and Advice on All Things Electronic
Phillips-vs-Roberts
Instructables feedback of article by several contributing members.
Rybczynski,Witold - One Good Turn: A Natural History of the Screwdriver and the Screw, Harper Flamingo Canada, Toronto, 2000, ISBN 0-00-200031-8
or
Rybczynski, Witold - One Good Turn: A Natural History of the Screwdriver and the Screw. New York: Touchstone, 2000. Good read on topic. It mentions some of the patent and economics of why we have so many of these darn things. "Screw your courage to the sticking-place, and we'll not fail," from Macbeth can go with your obscure party conversation and anecdotes about screws... (from contributor PMstagewarrior)
Camout (or cam-out) is a process by which a screwdriver slips out of the head of a screw being driven once the torque required to turn the screw exceeds a certain amount. Frequently, camout damages the screw, and possibly also the screwdriver, and should normally be avoided. However, the Phillips head screw and screwdriver combination was designed specifically to camout, as at the time of its invention torque sensing automatic screwdrivers did not exist.
Phillips is a trademark used for a screw with a head having two intersecting perpendicular slots and for a screwdriver with a tip shaped to fit into these slots.
Recess refers to the shaped socket into which a driver can be inserted
End-Load is the force required to keep the bit to not camout. Low end-load is usually most desirable.
1-Way refers to a screw that is designed for permanently single use only.
2-Way refers to a screw that is intended to be both inserted and removed, used more than once etc.
Referenced Articles
History of Screws and Screwdrivers, by Mary Bellis, About.com
Phillips or Pozidriv? Healey Magazine, Feb 1996
Why did this guy Phillips think we needed a new type of screw by Adams, Nov 24 1989
Screw Drive Systems, Wheeling, IL, Hitchcock Publishing, annual.
A New Design of Screw Head by Brian Rooks, Assembly Automation Vol 21-4, 2001
Furniture screws: primitive to gimlet by Fred Taylor, Discover Mid-America - Aug 2007
Robertson Screws by Ricketts
Hands-On: LOX Screws by Chuck Cage
Testing and Understanding Screwdriver Bit Wear. Thesis submitted to Virgiania Polytechnic and State University.
A New Design of Screw Head by Brian Rooks: Assembly Automation, 2001; Vol 21, Issue 4, Page: 329 - 333.
Inspection-6 Lobe Recess.pdf, article by Joe Greenslade found at www.greensladeandcompany.com
A Light Duty Parallelogram T Nut, version 3; by R.G. Sparber
Robertson Screw and Screwdriver - Incredible Inventions - Cool Canada - Library and Archives Canada, Collections Canada.
Manufactuers & Suppliers of Interest
Phillips Screw Company
Semblex Corporation
S.C.F. Fasteners, Taiwan
Uni-Screw Worldwide, Inc
Tamperproof.com
Seton Security
Quickscrews
Bristol Wrench
Complete FastenersBristol Wrench
Free Patents Online
TTAP Screws
Bryce Fasteners
DIY Security Bits.
Cam Car Solutions
Discussion Groups
Discussion Forum; Re Phillips vs Square
Helpful Fools / Does Anybody Know?
Electronics Point Discussion and Advice on All Things Electronic
Phillips-vs-Roberts
Instructables feedback of article by several contributing members.
Book on Screw History
Rybczynski,Witold - One Good Turn: A Natural History of the Screwdriver and the Screw, Harper Flamingo Canada, Toronto, 2000, ISBN 0-00-200031-8
or
Rybczynski, Witold - One Good Turn: A Natural History of the Screwdriver and the Screw. New York: Touchstone, 2000. Good read on topic. It mentions some of the patent and economics of why we have so many of these darn things. "Screw your courage to the sticking-place, and we'll not fail," from Macbeth can go with your obscure party conversation and anecdotes about screws... (from contributor PMstagewarrior)
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