A vise or vice is a mechanical apparatus used to secure an object to allow work to be performed on it. Vises have two parallel jaws, one fixed and the other movable, threaded in and out by a screw and lever.
Light duty homeowner's vise holding a brass check valve.
Contents [hide]
1 Types 1.1 Woodworking
1.2 Engineer's
1.3 Machine
1.4 Vacuum
1.5 Pipe
1.6 Clamp-on
1.7 Combination
1.8 Others
1.9 Misuse
2 See also
3 References 3.1 Notes
3.2 Citations
Types[edit]
Woodworking[edit]
Woodworker's vise with entirely wooden jaws
Woodworking vises are attached to a workbench, typically flush with its work surface. Their jaws are made of wood or metal, the latter usually faced with wood, called cheeks, to avoid marring the work.[1] The
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Abrasive chop saws have a special type of machine vise built in to the saw. Some hobbyists use a machine vise as a bench vise because of the low cost and small size.
Vacuum[edit]
A vacuum vise is a hobbyist's tool, commonly used to hold circuit boards, model airplanes and other small work. They are mounted with a suction cup and often have an articulated joint in the middle to allow the vise to pivot and swivel. Jewelers also use vacuum vises to hold jewelry.
Pipe[edit]
Pipe vises are a plumber's tool, often used to hold pipes in place for threading and cutting. There are two main styles: chain and yoke. The yoke type vise uses a screw to clamp down the pipe, and the chain style uses a chain for securing the pipe.
Heavy duty metalworking vise showing some cosmetic distress and a missing mounting bolt
Clamp-on[edit]
Clamp-on vises are basically very light-duty bench vises. They usually have smooth jaws for wood, plastic and light metalworking, but some have serrated jaws for getting a better grip on metal. Some unique vises combine these features in a rotating design. They also help to secure an object while working on the
There are two main things that can be used to secure joints: balsa cement or cyanoacrylate glue. Before gluing two pieces together, lay them out on a work board or wax paper and use pins to prevent the members from moving apart; the pins should not be placed near the joints so that it is easier while gluing (Anderson 2006). Then, apply the glue to the members and make sure that they touch to create the strongest joint possible. Despite it seeming as if more glue would make a structure stronger, using bulks of glue can cause the bridge to fail as cyanoacrylate bulk will cause the joint to become more brittle (Anderson 2006). To prevent excess gluing with cyanoacrylate, a special glue applicator should be used to minimize the amount of glue added to the wood, and to increase strength with balsa cement, thin the glue out first by making the solution 30% water. This process will be utilized when constructing the bridge to ensure that the joints are sturdy enough to withstand weight and won’t be the cause of failure.
center of a wooden stick which they would sharpen in with a smoothed groove stone. With the
The yarn is then woven and twisted rope. The rope is tied securely to the top of the mouton, through the hole in the upper crossbar, through the rings, and wrapped around the déclic. In the early days of the guillotine, the executioner cut the rope with a sword to drop the blade, but it became too time-consuming to readjust the rope so they changed the design to incorporate the déclic.The guillotine has been relegated to history and lore and is no longer used for executions. In isolated cases, craftsmen make guillotines for entertainment (films and television), but these are built with sophisticated safety systems and often as models. There are books and kits available to make models of the
'Static' climbing ropes are not really static, but actually just low elongation. Suppose, climbing with static rope, a 60 kg climber was to fall from thirty meters, with his last piece of protection 5 meters below you. He would then fall 10 meters. Assuming that his rope stopped him in 1/10 of a second, the stopping force he would feel would be equal to 8.4 kN, and the force on the anchor would be twice that, 16.8 kN. While most carabiners are rated up to 20+ kN, most ropes can withstand significantly less, usually about 9 kN.
...for each individual tooth which gave them the look and feel of brand new teeth. These teeth were fitted to the people’s mouth and mounted down with steel springs ("Technology Timeline.").
There are various canes that can be use; for example, there is a four-pronged ones and a single pronged one. The four-pronged cane allows for more stability, whereas the single one is for someone who needs just a tad bit of support.
These are usually ties having a bottom. Bindings attached to snowshoe equipment are available in 2 kinds:
This device was placed in prisoners' mouths and kept in place by locking the chain around their necks. Used in U.S. prisons in the nineteenth century.
The Archimedes‘ Screw is made up of a screw like spiral inside a hollow pipe with open ends. The screw is turned usually by a windmill or by manual labor. As the bottom end of the tube turns, it scoops up a volume of water. This amount of water will slide up in the spiral tube as the shaft is turned, until it finally pours out from the top of the tube. It was originally invented to scoop water out of the holds of ships.
Abnormal wear of tooth surfaces was an orthodontic problem early on, even ancient people wanted straight teeth! To close gaps, it has been construed that catgut did the work now done by today’s orthodontic wire. In 400-500 BC, Hippocrates and Aristotle both ruminated about ways to level teeth and fix many dental conditions. It should be noted that in Medieval times, expert barbers often performed dental “operations”, extractions, and procedures such as blood-letting. In seventeen twenty-eight, French Dentist Pierre Fauchard published a book called “The Surgeon Dentist” about ways to straighten and align teeth. He used a device called a “Bandeau,” a horse-shaped piece of precious metal which helped...
The knot when made with a large enough diameter rope creates a noose. The wraps create a large cylinder mass right above the loop. When placed around the condemned’s neck the noose is usually putt behind the left ear. This knot was designed so that when the person being hanged fell, the knot would deliver a striking blow to the back of the head causing it to snap the fourth and fifth vertebrae in the spinal cord.
For personal or professional reasons, some people do not want visible clasps on their partial dentures. Clasps are not needed to maintain stability with a semi-precision denture. Interlocking male/female attachments placed on the denture and abutment teeth, which are usually crowned, hold the denture securely in place and provide stability.
As scenery moved from scenic cloth drops to wooden portals and flats, JR Clancy released a catalog of heavy duty hardware specifically designed for theatre, such as brace hooks, cast iron sheaves, and swivel blocks. "On the Trail of Rigging History: 125 years of JR Clancy Catalogs” by Tom Young and Randi Minetor claims that JR Clancy invented the first movable head and loft blocks, allowing stagehands to change the position of a line set as the production requires
Leverage Part. The leverage part of the nail clipper is 2 inches long and weighs 3.8 grams. It is connected to the base by the same bolt that connects the two main pieces of the base. The bolt is constructed to allow the leverage part to rotate 360 degrees about the bolt. When the piece is lifted forward and in, it parallels itself to the base (Figure 2). It can also be moved to a position 43 degrees at an angle to the base which allows the piece to compress the two sharp end pieces of the base.
Woodworking, a form of carpentry, has been around for centuries and overtime developed into a more modern art. Today people will mostly see woodwork in homes in the form of furniture and decorations, or even smaller things such as family heirlooms passed down by generations and simple crafts made by younger generations. The skill of woodworking, however, is not inherited but takes practice and years of experience to fully master. Even experienced woodworkers run into challenges sometimes. The key is to overcome that obstacle and find different ways to create something new from a piece of wood. It is interesting to see and go through the process in which a woodworker goes through