Chapter: 1 Introduction 1.1. PANTOGRAPH A pantograph is a mechanical linkage mechanism which is connected as parallelograms so that the movement of one pen, in tracing an image, produces identical movements in a second pen. If any pattern or line drawing is traced by the tracer, an identical, enlarged, or miniaturized copy will be drawn by a pen fixed to the other end. Using the same principle, Manny types of pantographs are used for other forms of duplication in areas such as sculpture, minting, engraving and milling and further more. Due to the shape of the original device, a pantograph also refers to structure that can compress or expand like an accordion, forming a characteristic rhomboidal pattern. This is mainly seen in extension arms for wall mounted mirrors, temporary fences, scissor lifts, and other scissor mechanisms such as the pantograph used in electric locomotives and trams. Figure 1: Tracing Pantograph Figure 2: Schematic Diagram of Pantograph Figure 3: Pantograph in real life 1.2. FOUR BAR CHAIN MECHANISM A Four-Bar Linkage, also called a four-bar, is the simplest closed chain linkage with certain motions or movements. It mainly contains four bodies, called arms or links, connected in a closed loop …show more content…
The term rigid link is also sometimes simply called link is an idolization used in the study of mechanisms that do not consider small deflections due to strains in machine members. An inextensible or perfectly rigid link can exist only as a textbook type of model of a real machine member. For distinctive machine parts, maximum dimension changes are of the order of only a one thousandth of the part length. It is justified to neglect this small motion when considering the much greater motion characteristic of most mechanisms. The word link is used in many areas like gears, cams, and other members of machine in addition to cranks, connecting rods, and other pin-connected
...Modelling: Rigging Patterns - The Carracks and Caravels." Jan's Sites: Navigation. N.p., 8 Mar. 2012. Web. 24 Nov. 2013.
...he forge. The other half had the ends of each link flattened and then had holes punched in them. As the mail shirt was assembled a punched ring was linked to four of the welded rings, a rivet was put through the hole to close the link. Finally the whole mail shirt was likely to have been 'oil tempered' to make it stronger and give a small degree of rust-proofing.
A connecting rod subjected to an axial load F may buckle with x-axis as neutral axis in the plane of motion of the connecting rod, {or} y-axis is a neutral axis. The connecting rod is considered like both ends hinged for buckling about x axis and both ends fixed for buckling about y-axis. A connecting rod should be equally strong in buckling about either axis [8].
"Pan 's Labyrinth" is directed by Guillermo del Toro, is a magical realism drama. The screen shows the magical world of bizarre situations, a fictional out of Pluto 's daughter "Ophelia" to roam the world. To 1944 as the background, the fascist murder of guerrilla fighters as a real-world story. The whole film myth and reality are intertwined, is a complete metaphor and reflection on the Spanish civil war. One side is the little girl innocent fairy tale, while the Nazis are inhuman torture and slaughter. Two living scenes intertwined in a film, brings out a moral and human conflict. This is the child to see everything in the eyes, and what we see, it seems that the other world.
Taskforce, M. E. W. (2012, April 1). People: Department of Mechanical Engineering, University of Melbourne. Retrieved 22 May 2014, from http://www.mech.unimelb.edu.au/people/staff.php?person_ID=188333
Continuum Mechanics is the branch of mechanics which deals with the study of deformation and motion of continuous bodies. Primarily, a continuous solid body can be categorized into two types: (i) Rigid body and (ii) Elastic body. When external forces are applied on the body and the relative positions of its particles do not change at all, the body is said to be perfectly rigid body, otherwise it is said to be elastic body. A body is called strained, if under the influence of some external forces, the relative positions of its particles get altered. The change in the relative position of particles is called deformation. In practice, all solid bodies undergo deformation up to some extent by the application of suitable forces upon them. There are certain bodies which regain their original configuration when the deforming forces are removed. For example, the wire regains its original length after
Together, they are attached to one end then to a counterweight on the other. This arm is then hooked up with a tripod or any supporting device. This is like a seesaw when you see it, with the fulcrum located at the counterweight’s closer end. This gives the camera a wider range of motion.
Barsom (2000) [6], concludes that fatigue is the failure mechanism of the connection. This report was never distributed to the practicing engineers, as only selected SAC committee members received it.
Walter Oltmann’s aluminum wire drawings Mother and Child has been created using the technique of hand crocheting the wire to create lace-like, delicate marks that are layered to create tonal variety and form. (Goodman Gallery, 2012, http://www.goodman-gallery.com/artists/walteroltmann) In the case of this drawing, this technique has been used to create a large-scale image of mother and child skeleton figures nestled in a harmonious and balanced, floating halo-like bed of interconnected lace. Although the crocheting of the wire has resulted in a shallowly three-dimensional image, when considered in relation to the The Oxford Dictionary’s definition of drawing , Mother and Child can be seen to fall under it. The composition has been created by assembling a series of “marking lines and marks,” using wire to create tonal variety and forms, a...
The microscope became one of the definitive laboratory equipments for the different sciences. According to a biologist William Carpenter, the microscope was an instrument used for scientific research and to satisfy the curiosity of science and others. Mary Ward acknowledged others to the microscopic world of panoramic, comparing and promoting the scenes of the microscopic world. For instance, some authors were capable to spectacle the animal kingdom under it; for example, sea-urchins, barnacles, and even smaller being like infusorians. Likewise claimed by Lane Clarke, microscope is a gadget to discover and learn. On the other hand, microscope is not only to educate but to entertain people. The littlest details were able to be seen underneath it. It created an amusement shift in how people view the world and others. It could be an enjoyable method through stereoscopes, kaleidoscope, and
One definition of a microscope is "an optical instrument that uses a lens or a combination of lenses to produce magnified images of objects." Holden Caufield can be symbolized by a microscope and its parts: the field of view, the focus, and the magnifier.
2) A microscope under which to view yeast cells OR a printed microscopic picture of magnified yeast cells OR a video of yeast cells under a microscope
Taking shots of moving objects can prove challenging for novice photographers. However, this is something that is easily achieved if practice and research is embraced. Panning shots help you to take photographs with a blurred background but a crisp subject. You need to first understand the best technique to use for impressive results. However, this is not about how long you have been using your camera. It is a skill that is obtained through practice. It takes patience to learn this technique because it is not something that you can acquire in one training session. Here are simple steps to guide you to shooting the best panning shots ever.
The object is imagined to be placed in the third quadrant of the axis system. The plane of projection lies between the observer and the object. The plane of projection is assumed to be transparent. When views are drawn in their relative position, Right side view drawn to the right side of elevation and, Top view comes above the Front view.
Keep cords and cables in one place with our Hollow Servo Motor, which is designed with a flange-mount hollow bore. It allows for media – power cables, pipes and hoses – to pass through the motor. The motor produces powerful torque and high stiffness with a low total weight, making it well suited for applications where the motor is also moving. It is ideal for industrial robots, machinery, machine tools, automatic assembly machines, converting and printing, handling equipment, and laser machine