...speed and will never slip. * Dog clutches are used where slip is undesirable and/or the clutch is not used to control torque. Without slippage, dog clutches are not affected by wear in the same way that friction clutches are. * Dog clutches are used inside manual automotive transmissions to lock different gears to the rotating input and output shafts. A synchromesharrangement ensures smooth engagement by matching the shaft speeds before the dog clutch is allowed to engage. Friction Clutch: * A clutch is a mechanical device that provides for the transmission of power (and therefore usually motion) from one component (the driving member) to another (the driven member) when engaged, but can be disengaged. * The vast majority of clutches ultimately rely on frictional forces for their operation. The purpose of friction clutches is to connect a moving member to another that is moving at a different speed or stationary, often to synchronise the speeds, and/or to transmit power. Usually as little slippage (difference in speeds) as possible between the two members is desired. Cone Clutch: * A cone clutch serves the same purpose as a disk or plate clutch. However, instead of mating two spinning disks, the cone clutch uses two conical surfaces to transmit torque by friction. * The cone clutch transfers a higher torque than plate or disk clutches of the same size due to the wedging action and increased surface area. Cone clutches are generally now only used in low...
Words: 686 - Pages: 3
...Dana parts to purchase sprag clutches for the helicopters that robinson manufactures with a specified design and hardness. The Federal Aviation Administration (FAA) approved design specification for Robinson’s helicopters required sprag clutches of a level of hardness described as “50/55 Rockwell.” Dana initially supplied parts for Robinson that complied with the design specifications. But after 12 years of continuous supply, between July 1996 and October 1997 Dana Corp manufactured and delivered clutches with a higher level of hardness namely “61/63 Rockwell” [ (Robinson Helicopter Company, INC., V. Dana Corporation, 2004) ]. During this period Dana corp did not notify Robinson corp about the changes in design specification and did not obtain the necessary certifications. During the 15-month period, Dana continued to deliver its sprag clutches to Robinson and provided a written certificate of compliance with contract specifications with each shipment. The 61/63 Rockwell sprag clutches with a higher level of hardness suffered a higher level of failure compared to the conforming parts (50/55 Rockwell) [ (Robinson Helicopter Company, INC., V. Dana Corporation, 2004) ]. Moreover Dana did not inform about the change in parts until three months after Robinson notified Dana about the high rate of clutches failure. As a result of these events Robinson was required by FAA and its British counterpart to recall and replace non conforming sprag clutches. Upon the completion of recall...
Words: 1511 - Pages: 7
...Spare parts which need to be addressed or ordered: Presently for right handed clutches you have on hand 2 new outer springs, 2 used inner springs, 0 outer clutch hubs clutches, 0 new right clutches Presently for left hands clutches you have on hand 3 older outer springs, 6 used inner springs, 0 outer clutch hubs and 0 new left clutches Presently for linear clutches you have on hand nothing I recommend that you have at least six right hand clutches on hand either being new or newer parts also including the hubs, 4 left handed clutches and 2 linear clutches also with the above specifications for the right clutches 6 x Right hand clutches or clutch springs, (hub part number 14614180), (Complete clutch part number 14613870), (Outer spring 14613840 ?) 4 x Left hand clutches or clutch springs (Complete clutch number 14613880) (outer spring 14613830 ?) (Inner spring 14613120) 2 x Linear clutches (14611990) Please be advised that the Moba Omnia machines only use right hand clutches and only on the denesters. All other clutches have been replaced with servo motors. Off grade buttons (complete, buttons only, or tabs for buttons. (Since you have problems with buttons popping up on machine #3 this shows button fatigue. You also have three machines so you might consider getting a complete set of buttons and then use the used buttons for spares). 4 X Proximity switches (03200072) Hardware an assortment of nuts and bolts organized in bins MACHINE #2 MA19 synchronization...
Words: 1678 - Pages: 7
...Hello magda How have you been? yesterday your friends told me you were looking for me as crazy on the street and i was drinking like a crazy beer with some partners hurting my head drunk with a bad heart walking alone i met her woman so beautiful and i with a bottle let me get tangled up i fell into the clutches of her woman so beautiful and i with a bottle i let myself get tangled easy i fell into the clutches of her they told me you were a little sad that you got to drink and with a man out there you went there baby you hurt my heart i no longer believe in love now for you i'm worse there's a baby you hurt my heart i do not believe in love now for you i'm worse i went to kill my spite in the rain on the roofless street thinking with who...
Words: 334 - Pages: 2
...Fashion fascinations for Spring 2010 Spring 2010 exemplifies clothes that are soft, feminine, not overtly frilly and most of all capturing that easy-sexy look effortlessly. Here are the fashion fascination highlights for Spring 2010. 1. Skater Dresses. Yes, every little girl’s favorite sport--figure skating is finally hitting the runways this season. This short dress is a favorite for A-list celebs such as Zoe Saldana and Chloe Sevigny. Skater dresses are so flattering because it flares from the waistline giving a girly & youthful feel. The soft, layered hemlines whether done in pleats or ruffles are sure to make any woman twirl with delight. This dress shows off your lean legs-instantly giving you that svelte look. This look is easy-sexy that comes in soft hues such as lavender, blush and peach. Spring shows are filled with this fantasy inspired look from Louis Vuitton, Christian Dior to Stella McCartney. It is highly recommended that you invest in this piece, as this dress will most likely be wearable for the summer. 2. Gray for day, silver for night. Gray is the new go-to color for day. It’s an easy flattering color that will suit almost everyone. Designers have handpicked a light gray color for spring 2010 shown in most skirts, shorts and blouses. Night time signals the need for some eye-catching hue--silver. Another color that is easy to wear but designers are gunning for the sequined, sparkly silver hue. Arrays of choices are available as designers such as...
Words: 931 - Pages: 4
...Do you know what it is like to be poor? The world often demonizes the poor for being too lazy and unmotivated. That assumption is often very wrong, people in poverty try their hardest to escape but it is often too hard. But what if I told you it was actually our fault, Society as a whole could be doing more to help the poor. It is society’s responsibility to help those in poverty escape its clutches. In their paper Framing the Poor, Max and Frank discuss the prominence of the pessimistic view towards the poor in recent years. They discuss Ronald Reagan and a strategy of his campaign, where he would talk about Linda Taylor, “The Welfare Queen”. She was a highly skilled con artist, who had 80 fake names and made $150,000 in illicit welfare (Max and Frank). Linda Taylor doesn't make a good name for the poor, many people despised her for cheating the system for her income while others had to actually work. However Taylor is an extreme case, and it is only probable that she had this big of a con. Taylor still became a media sensation, with many people believing that she represented the poor. This lead to a harsh attitude to the poor and the belief that they were lazy and living off welfare...
Words: 1004 - Pages: 5
...shines through, even as he does dishonorable things. The images scattered along the book are A+ and brilliant in the ways they portray the corresponding scenes. Descriptions of places are a delight, even if the place being described is not pleasant at all. Action scenes are on point and absolutely thrilling. The crew's employment under the president is satisfactorily detailed, and it really hammers down the idea that these men, with Gunns at the helm, are being slowly buried under the filth of their employer. It's a good setup for a redemption arc. There are lots of room for improvement for the grammar, but I still enjoyed the story overall. For example, from the prologue, "if he ever won free of their clutches" should be changed to "if he ever broke free from their clutches." On page 24, "Gunns crashed into the president, taking them both to the wooden floor of the platform with a painful thud, and covered him with my own body" should be changed to "and covered the other man's body with his own" or something to that effect, to avoid confusion with pronouns and to keep the point of view in third person. There are a couple more missing punctuation marks and grammar lapses, but they aren't too irritating. I don't think the book was professionally edited. The unsolved mysteries in this book are making me itch for the next one. I am a sucker for unexplained supernatural phenomena, and the main antagonist's apparition is a juicy piece of writing. I finished reading this in less than...
Words: 570 - Pages: 3
...Start the essay with “It was raining heavily”. It was raining heavily. Jack was still waiting for Jennifer in the school. He was holding an umbrella and there she was. “Sorry for being late Jack.” “It’s okay Jen. Let’s go now.” Jack Raymond was the most popular boy in school. He was the typical Mills and Boon hero – tall dark and handsome. He was like a Greek God with a well-sculptured body and features that even men envied. Every girl in school admired him openly. Jack was also warm and caring. This endeared him to one and all. He had several close friends of both genders but he was closer to Jennifer, a childhood friend. Soon after finishing high school, both Jack and Jennifer were accepted into the same local university. Jack studied accountancy while Jennifer studied psychology. In their final year, they fell in love with each other. It was like a match made in heaven. They complemented each other in every possible aspect – looks, intelligence and temperament. Upon graduating, Jack was hired by a leading accounting firm while Jennifer joined a private university. Both worked hard and they flourished in their respective careers. They were also ready to settle down. The marriage was simple, attended by close family members and friends. Initially, they rented an apartment in one of the suburbs. Within a short span of five years, they became well-established in their chosen fields and they prospered financially. Jack was offered a senior management post in his company and...
Words: 827 - Pages: 4
...Plane Horizontal Force Required to Move the Body Screw and Nut Friction 2.10 Self-Locking Screws 2.11 Condition for Maximum Efficiency 2.12 Screw Jack 2.13 Pivot and Collar Friction 2.13.1 Flat Pivot 2.13.2 Conical Pivot 2.13.3 Collar Bearing 2.14 Clutch 2.15 Types of Clutches 2.15.1 Conical Clutch 2.15.2 Single Plate Clutch 2.15.3 Multi Plate Clutch 2.16 Journal Bearing 2.17 Rolling Friction 2.18 Ball and Roller Bearings 2.19 Summary 2.20 Key Words 2.21 Answers to SAQs 2.1 INTRODUCTION When a body moves or tends to move on another body, a force appears between the surfaces. This force is called force of friction and it acts opposite to the direction of motion. Its line of action is tangential to the contacting surfaces. The magnitude of this force depends on the roughness of surfaces. In engineering applications friction is desirable and undesirable. We can walk on the ground because of friction. Friction is useful in power transmission by belts. It is useful in appliances like brakes, bolts, screw jack, etc. It is undesirable in bearing and moving machine parts where it results in loss of energy and, thereby, reduces efficiency of the machine. In this unit, you will study screw jack, clutches and different type of bearings. 51 Theory of Machines Objectives After studying this unit, you should be able to know application of friction force, know theory background of screw jack, know different type of bearings, analyse bearings, and know function...
Words: 6929 - Pages: 28
...Along the Mason-Dixon Line, separating Pennsylvania and Maryland, lay a very big difference for African-Americans in America during the 19th century. From Pennsylvania to Maine, African-Americans were free from the harsh clutches of slavery. But from Maryland to Texas, Southerners owned slaves by the hundreds. Frederick Douglass was born into slavery and spent 20 years working for various slave owners. In “Narrative of the Life of Frederick Douglass” written by Douglass himself, the brutal conditions of slavery as well as Douglass’s character and the role of religion are all shown from what Douglass experienced while he was a slave. The conditions for all the slaves in the South were very similar. Most slaves were given the same allowances once a year. Like the...
Words: 614 - Pages: 3
...Organism Physiology In this paper I will write about a snake. The snake I will writing about is the California King snake. How it evolves in its environment. What are its physical attributes? What is a snake? A Snake is any of numerous limbless scaled reptiles (suborder Serpentes syn. Ophidia) with a long tapering body and with salivary glands often modified to produce venom which is injected through grooved or tubular fangs. Found across the Western and Southwestern United States, the California king snake (Lampropeltis getula californiae) is one of 80 recognized subspecies of the king snake. The subspecies has a number of different color morphs. California kings are popular and harmless pets. Hybrids with other king snake subspecies and closely related snakes such as the corn snake (Elaphe guttata) are available. Description At a maximum length of 48 inches and 5 inches in girth California kings are smaller than other king snake species. The head is small and barely wider than the body and the scales are shiny and smooth. The typical coloration is white bands over a black or dark brown background, but there are unbanded races with a single vertical line running from head to tail and others with lateral stripes. Desert king snakes tend to be brown with yellower stripes while coastal animals have the highest contrast black and white bands. The pet trade has albino varieties, but albino snakes are rarely found in the wild. Range While common in California, California...
Words: 807 - Pages: 4
...doctors from North America and they too are less in number. But as this surgery has been introduced, a large number of patients can be operated by making very minute sizes of incisors than those deep cuts made in past. What to be done after knee replacement surgery This surgery requires the patient to spend about three to five days in hospital after the surgery. Patients who undergo this surgery are welcomed by quick recovery and start feeling the effects after one month or so. Although running, jumping and quick steps are never possible for those who went through this surgery, but the absence of pain and stiffness can be felt by the patient at the start of next month. They might need temporary help of clutches soon after the surgery but as the knee heals so does the clutches must go. Requirement and duration of physical therapy after the surgery The doctor advises the patient to either consult a physiotherapist to treat you at home or you are asked to join a rehabilitation centre and are required to spend about seven to ten days there. Safety measures after the knee replacement surgery You must take severe care of your knee after the surgery as a little pressure or a twist can undo or do much worse to the joint. Following are some of the things you must not do. • Pivoting • Squatting • Twisting • Kneeling These positions are like prohibited to you for about six to seven weeks. How to take care of your knee at home You must take care that you do not take any falls after...
Words: 825 - Pages: 4
...Table of Contents Introduction 3 Examples of the buying guides 3-4 General information and definitions 4 Hypothesis test 6 APENDIX A 10 The scatter graph of Mustang Price vs. Convert 10 The scatter graph of Mustang Price vs. Age 10 The scatter graph of Mustang Price vs. Miles 10 The scatter graph of Mustang Price vs. Transmission Type 10 The scatter graph of Mustang Price vs. Cylinders 10 The scatter graph of Mustang Price vs. Color 10 The scatter graph of Mustang Price vs. Grand Tourers 10 How much I want to spend. TO: Tom Jones, Owner of Tom’s Used Cars DATE: 7/26/2011 SUBJECT: Analysis of asking car prices (Used Mustangs) Please find below the results of the analysis of the asking prices of used cars with different characteristics. Introduction Buying cars is one of the most critical things in our life. We need to research different categories before we spend our dollars, and we must establish buying guides. Examples of the buying guides are: 1) I have to know exactly how 2) I have to know what car I want and what car meet my criteria. These guides will help us decide how much you can afford to spend, whether you should look at a fancy car or regular car, whether you should look at car with grand tourer (GT) or without grand tourer, style, transmission type and a myriad of other factors. The borderline that we agreed on as a team is the car reliability, quality, performance, and power. On this specific case study we would like to study...
Words: 1762 - Pages: 8
...Mercedes Benz AMG Mercedes Benz is an amazing car brand with great horse power and a beautiful look. The brand offers different styles of cars from Sedans to SUVS and sports cars. One of the nicer versions is the C63 AMG. Three important aspects of the car are the Engine, the Transmission, and the LED headlights. This essay will explain the features of each and why the features make the AMG a great car. The Engine of the AMG is very important for the car’s function and drive. The 4.0-liter V-8 biturbo engine of the AMG is the first sports car engine in the world which has the turbos inside the V of the engine. (AMG Driving Performance , 2015). It also has dry sump lubrication, which is “a lubricating motor oil management method for four-stroke and large two-stroke piston internal combustion engines that uses additional pumps and a secondary reservoir for oil—as compared to a conventional wet sump system, which uses only the main sump below the engine and a single pump.” (Dry Sump , 2015). This makes the engine more efficient because of the prevention oil-starvation at high g loads, and because their lower center of gravity positively affects performance. (Dry Sump , 2015). The head of engine design at AMG stated: “With the new AMG 4.0-litre V8 biturbo engine, we present a fascinating and powerful sports car engine, which also achieves the next step in efficiency due to numerous measures.” (Mercedes Benz, 2014). The advantages of the engine are that the eight-cylinder engine...
Words: 1054 - Pages: 5
...Throughout the intricate novel In the time of the Butterflies, the Mirabal sisters all strengthen themselves against the clutches of Trujillo’s reign displaying a strong sense of courage. The sisters have their own personalities each being different in their own way but something that can be seen in all of them is how they are able to fight against the norms of society without fear of being outcasts or being killed in action. Minerva mirabal strongly displays courage in her family which affected her sisters in a positive or negative way depending on one's outlook. Her bravery motivated her sisters to stand up for what they believe and to not be so easily shot down by everyone else’s view on them. Patria Mirabal derives a lot of her courage through her faith which does help her greatly throughout the Time of the Butterflies. During the revolution bearing Raulito she states “But then again, here in that little room was the same Patria Mercedes, who wouldn’t have hurt a butterfly shouting, ‘Amen to the revolution’” (164). This statement is a turning point for Patria because it indicates the moment where she decides she is not going to be stand behind the protection of her family and friends, rather she will stand up for her beliefs fight for her loved ones. When she says this, she is relating herself to the old Patria who was meek and kind but then...
Words: 1090 - Pages: 5
