hammer

hammer

Tool for pounding or delivering repeated blows. Hand hammers have a handle and striking head. Surfaces of hammerheads vary in size, angle of orientation to the handle (parallel or inclined), and type of face (flat or convex). Carpenters' hammers often have a claw on the head for extracting nails. Weights range from a few ounces or grams up to 15 lbs (7 kg) for hammers used in breaking stones. Steam hammers often use, in addition to gravity, a downward thrust from a steam-activated piston. Pneumatic (air-driven) hammers include the hammer drill, for rock and concrete, and the riveting hammer, for construction operations involving steel girders and plate.

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hammer

(1) (Hammer) The code name for AMD's 64-bit CPU chips using 0.13 process technology. The Sledgehammer was introduced as the Opteron in 2003 for servers and workstations, and the Clawhammer was born that same year as the AMD Athlon 64. Designed for different markets, the initial Athlon 64 processor contained one HyperTransport link while the Opteron for servers came out with three links embedded on the chip.

Using silicon-on-insulator technology (SOI), both the Athlon and Opteron versions of Hammer provide backward compatibility for all 32-bit software that has been running on PCs since the mid-1990s. In the spring of 2002, Microsoft announced Windows support for these 64-bit chips. See Opteron, Athlon, SOI and Itanium.

(2) In a printer, the mechanism that pushes the typeface onto the ribbon and paper or pushes the paper into the ribbon and typeface.

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hammer

1. a hand tool consisting of a heavy usually steel head held transversely on the end of a handle, used for driving in nails, beating metal, etc.

2. any tool or device with a similar function, such as the moving part of a door knocker, the striking head on a bell, etc.

3. a power-driven striking tool, esp one used in forging. A pneumatic hammer delivers a repeated blow from a pneumatic ram, a drop hammer uses the energy of a falling weight

4. Athletics

a. a heavy metal ball attached to a flexible wire: thrown in competitions

b. the event or sport of throwing the hammer

5. a device on a piano that is made to strike a string or group of strings causing them to vibrate

6. Anatomy the nontechnical name for malleus

7. Curling the last stone thrown in an end

8. go (or come) under the hammer to be offered for sale by an auctioneer

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hammer [′ham·ər]

(design engineering)

A hand tool used for pounding and consisting of a solid metal head set crosswise on the end of a handle.

An arm with a striking head for sounding a bell or gong.

(graphic arts)

The mechanism of an impact printer that presses the typeface against the ribbon and paper, or presses the paper against the ribbon and typeface.

(mechanical engineering)

A power tool with a metal block or a drill for the head.

(ordnance)

A metallic pivoted item in a firing mechanism designed to strike a firing pin or percussion cap and thus fire a gun.

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hammer

Christian symbol for martyrdom, crucifixion. [Christian Symbolism: Jobes, 391, 716]

See : Passion of Christ

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hammer - Commonwealth hackish synonym for bang on.