Roll a ball under your hand on a table and roll a pencil in the same manner. What you feel are "point" and "line" bearings. But to understand what mechanics mean by a surface "bearing," grasp a pencil in your hand and use your other hand to make it turn as a piece of shafting. Now, the lower half of the shaft is supported everywhere by contact with your hand - the upper half is not supported, merely covered. The advantages of ball and roller bearings were obvious many years ago to mechanical people... Solid steel rollers, being inflexible, were not satisfactory at that stage, but a Hyatt flexible roller bearing was different. We had something. Our spirally wound tube roller had a springlike quality, yielded to irregularities caused by poor manufacture, thus making automatic adjustments between housing and bearing.
Alfred P. SloanRelated topics
automatic ball bearing different grasp half housing line lower making manufacture mean mechanics now piece point poor quality roll roller satisfactory something steel surface table thus turn under use wound yearsRelated quotes
Every measurable thing except numbers is imagined in the manner of a continuous quantity. Therefore, for the mensuration of such a thing, it is necessary that points, lines, and surfaces, or their properties, be imagined. For in them... measure or ratio is initially found... Therefore, every intensity which can be acquired successively ought to be imagined by a straight line perpendicularly erected on some point of the space or subject of the intensible thing, e. g., a quality... And since the quantity or ratio of lines is better known and is more readily conceived by us-nay the line is in the first species of continua, therefore such intensity ought to be imagined by lines... Therefore, equal intensities are designated by equal lines, a double intensity by a double line, and always in the same way if one proceeds proportionally.
Nicole Oresme
A new development began for relativity theory after 1925 with its absorption into quantum physics. The first great success was scored by Dirac's quantum mechanical equations of the electron, which introduced a new sort of quantities, the spinors, besides the vectors and tensors into our physical theories. ...But difficulties of the gravest kind turned up when one passed from one electron or photon to the interaction among an indeterminate number of such particles. In spite of several advances a final solution of this problem is not yet in sight and may well require a deep modification of the foundation of quantum mechanics, such as would account in the same basic manner for the elementary electric charge e as relativity theory and our present quantum mechanics account for c and h.
Hermann Weyl
The speeches by the Minister and the former Minister were an absolute disgrace in complacency, especially the assumption that market forces will solve the housing problem. If that is so, why is it that there are record numbers of homeless people? Why is it that tonight, as on every night of the year, people will be sleeping under the national theatre, in Covent Garden, around the tube stations in London and alongside the main roads? The Government, in their obsession with market forces and the triumph of the rich over the poor, are creating a hobo society. That is all they are trying to do with their housing policies...They are proposing a return to Rachmanism. They are proposing all the horrors of the Rent Act 1957: nothing but homelessness and exploitation for the unemployed, the poor and the homeless.
Jeremy Corbyn
The disharmoniousness (one might say, the negative rhythm) of the individual forms was that which primarily drew me, attracted me, during the period to which this watercolor belongs. The so-called rhythmic always comes on its own because in general the person himself is rhythmically built. Thus at least on the surface, the rhythmic is innate in people. Children, 'primitive' peoples, and laymen draw rhythmically..
In that period my soul was especially enchanted by the not-fitting-together of drawn and painterly form. Line serves the plane in that the former bounds the latter. And it makes my heart race in those cases when the independent plane springs over the confining line: line and plane are not in tune! It was this that produced a strong inner emotion in me, the inner 'ah!
Wassily Kandinsky
While one welcomes aid that gets through to help the poorest people in the poorest parts of the world, does my hon. Friend share my concern that some policies, particularly those adopted by the World Bank in its advice to poor countries in receipt of loans it organises, force on those countries economic models that often involve cuts in public expenditure which make the living conditions of people dependent on public services, health, education or housing worse because those countries are pursuing some economic Valhalla similar to that pursued by the present Government? Does he believe that the Government should consider their role in multinational agencies such as the World Bank as well as my hon. Friend's obvious and quite correct concern about the lack of spending on overseas aid in general?
Jeremy Corbyn