| Unit 7: Appendix | |
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GLOSSARY |
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Simultaneous | To take place at the same time. | |
Sleeve | A thin hollow material that is inserted onto another to provide proportionate spacing. | |
Snap Ring | A circular clip that may be applied to a shaft, etc. to prevent another object from moving - used | |
to retain objects in position. | ||
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Solid | An item that is not porous. | |
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An item that is not transparent or translucent. | ||
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Spacer | Any object of purpose to maintain a specific distance from two other objects - example: a | |
sleeve or washer. | ||
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Spindle | A shaft or rod that is fixed on one or both ends and spins on its axis while maintaining its | |
projection. | ||
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| (Static Random Access Memory) A type of memory that is faster and more reliable than the | |
SRAM | more common DRAM. The term static is derived from the fact that it doesn’t need to be | |
| refreshed like DRAM. | |
Stainless Steel | A shiny, | |
Steel | Metal that contains a specific percentage of carbon. The percentage of carbon determines its | |
strength, in addition to how prone it is to rust. | ||
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Stepper Motor | An electrical motor designed to rotate in both directions and to move in incremented distances. | |
A group of components assembled to form a complete unit that is a part of a larger unit. | ||
Switch | A small mechanical device when altered sends an electrical signal to influence a | |
predetermined activity. Unlike a button or key, switches may have multiple positions. | ||
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Tag | Relative to RFID, the transmitter/receiver pair of transceiver plus the information storage | |
mechanism attached to the object. Also referred to as Transponder. | ||
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| The printing method that creates an image by transferring ink from a heat activated ribbon | |
| onto the media using the heat from a thermal printhead. | |
| A printhead is composed of a set of pins referred to as “elements” which may be selectively | |
Thermal Transfer | heated through electrical induction. Regular paper media is used in this application in | |
conjunction with the heat sensitive ribbon. The ribbon deposits a coating of dark material onto | ||
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| the paper when exposed to intense heat. | |
| Thermal transfer printing is more durable than direct thermal printing and is often used when a | |
| label needs to endure longer than a year. | |
Thermodynamics | The science that deals with the relationship of heat and mechanical energy - also the | |
conversion of one into the other. | ||
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Threads | The spiral grooves on the shaft of a screw, | |
The three projectories of an object: X axis is the distance left and right, the Y axis is the | ||
distance up and down, and the Z axis is the distance inward and outward. | ||
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Torsion Spring | A piece of wire bent into a spiral and connected on each end by different objects to allow them | |
to be pulled apart and then automatically return to their original position once released. | ||
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| A device used to increase or decrease electricity’s voltage and current. The device consists of | |
Transformer | one or more windings (typically copper) which, the ratio of the number of turns inversely | |
determines the voltage change. The windings are wrapped around a magnetic core affecting | ||
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| magnetic induction. | |
| A device used to amplify a signal or open and close a circuit. Is constructed of a | |
Transistor | semiconductive material and is comprised of three terminals where one can be used to control | |
| the flow of current through the other two. | |
Translucent | When a medium is of a condition so as to allow light to filter. | |
Transparent | When a medium is of a condition so one can see through it unfettered. | |
Transponder | Relative to RFID, the transmitter/receiver pair of transceiver plus the information storage | |
mechanism attached to the object. Also referred to as Tag. | ||
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Tread | The act of an object making repetitive contact upon another that is in motion. | |
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PN: 9001155A |