A bicycle is a two wheeled vehicle driven by the riders feet pushing on cranks or pedals. A common misconception is that the earliest form of bicycle was the dandy-horse, which was pushed along by the rider's feet. However, while both the dandy-horse and the later bicycle are both velocipedes, the dandy-horse is not propelled by cranks.
The first bicycle was introduced to England from France in 1868, and comprised two solid wheels of equal size fitted to a frame, much like a modern bicycle in appearance, with a saddle fitted in the centre and propelled by cranks attached to the front wheel. This vehicle provided such a bumpy ride to the rider that it became popularly known as 'the bone-shaker'. Later came the Penny-Farthing with pedals fixed to the large front wheel which was made large to achieve high speeds. Later still, around 1895, came the safety bicycle with pedals driving the rear wheel by way of a chain, and the rider sitting upon a saddle set back from the front wheel so as to reduce the chances of falling forwards over the handlebars, from this developed the Raleigh bicycle design of 1900 which forms the basis of the modern bicycle. In 1888 the two-person tandem bicycle was invented.
In 1906 it was reported that speeds of 50 mph were attained on a bicycle. Around the same time, slightly earlier, the motorised bicycle (motorcycle or motorbike) was invented.
A typical bicycle is comprised of several parts. The principal and essential being: the frame, front forks, wheels, pedals, saddle, handlebars, chain and brakes. The largest part of the bicycle is the frame, and these vary in design depending upon the specialised intention of the bicycle.
A frame for a BMX bicycle being small, heavily braced and made of aluminium. The frame for BMX xyxling needs to be strong so as to endure the stresses of the bumpy ride, and the saddle low as competitors never sit down during a competition and as such they need space to sprint and jump with ease.
Cross-Country cycle frames are generally made of aluminium and carbon-fibre so as to be light weight. They are relatively small frames to allow quick and easy mounting and dismounting off road, and strong to endure off-road bumpy conditions. The smaller frames are often compensated for by having a longer seat post to allow a normal height saddle position.
The cycle speedway bicycle frame is designed primarily for strength, and as such is typically made from steel or aluminium.
Road racing bicycle frames are designed to be light and stiff. Traditionally they ewre made of steel, but by the start of the 21st century carbon fibre was being used for the more expensive models as this offered the same stiffness at reduced weight. The design of the tubes also developed over time, tubes becoming of a larger diameter, but thinner walls, to allow the same stiffness with reduced weight.
Bicycles are fitted with various types of brake, the most popular being the calliper, cantilever, hydraulic or disc and the V brake. The most common form of brake found on leisure bicycles, is that form used also on road racing bicycles. The calliper brake. Calliper brakes are a very efficient means of rim braking and basically comprise two blocks of rubber or plastic which are squeezed onto the wheel rim when the brake lever is squeezed by the ride.
Cantilever brakes operate on the same principal as calliper brakes, but are of a slightly different design at the wheel end, offering increased clearance between the tyre and the brakepads and as such are frequently employed for cyclo-cross bicycles and mountain bikes.
The most efficient form of rim brake is the V brake. The V brake also offers the most clearance of any rim braking system, and is most often found on mountain bikes.
Hydraulic or disc brakes are the most efficient and powerful form of bicycle brake. They use the wheel hub to brake, rather than the rim. Disc brakes offer the most clearance, and as such are used on mountain bikes, but are also expensive to fit and maintain.
Bicycle wheels are generally of one of three types. The most common and traitional bicycle wheel is the spoked wheel, comprising a rim connected to the central bub by a series of thin metal rods known as spokes. Spoked wheels are light in weight. Less common than spoked wheels, but offering greater strength and durability at the expense of weight are mag wheels which comprise a rim attached to the hub by a few, thick solid plastic bars. Solid wheels, also known as disc wheels, are made from composite material or carbon fibre are very strong, stiff, aerodynamic and very expensive. They are rarely used except as rear wheels in time-trialing and track racing. Research Bicycle More pictures of Bicycle
Blessing or benediction is a prayer or solemn wish imploring happiness upon another; a certain holy action which, combined with prayer, seeks for God's grace for persons, and, in a lower degree, a blessing upon things, with a view whether to their efficiency or safety. The lifting up of the hands is practised in the act of ceremonial blessing. In the Roman Catholic Church the sign of the cross is made, and the thumb and the two first fingers of the right hand are extended, the two remaining fingers turned down. In the Greek Church the thumb and the third finger of the same hand are conjoined, the other fingers being stretched out. Some see in this position a representation of the sacred monogram in Greek letters of Jesus' name. In the English liturgy there are two blessings or benedictions; in the service of the Scotch Church there is only one. Research Blessing
A cabriolet (cab) was a vehicle similar to a hackney-carriage with two or four wheels, originally drawn by a single horse but later by a motor. The original cabriolets were for a single passenger beside the driver and were a kind of hooded chaise. In the beginning of the 19th century an effort was made to introduce cabriolets into Britain, to supersede hackney carriages. It was not until 1823, however, that licences were obtained for cabriolets. At first their number was limited to twelve. These were of an improved pattern, with a folding hood, and seated two passengers, the driver being separated from them by a partition. In 1832 all restrictions were removed, and cabriolets came into popular favour. In 1836 a cabriolet on four wheels, the precursor of the brougham, was introduced, and from this the clarence evolved. In 1834 a patent was taken out for an improved, two-wheeled safety cab by Hansom, the architect of Birmingham town hall. The safety consisted in an arrangement of the framework which prevented the cab tilting backwards
or forwards in case of accident. These cabriolets had a small body, hung between wheels of over seven feet diameter. Two years later a fresh patent was obtained for an improved Hansom. Motor cabs were first introduced in 1897, but failed to pay and were phased out, only to start to reappear in London around 1905. Research Cabriolet
A chartulary is a record or register in which the charters, title-deeds, etc, of any corporation were copied for safety and convenience of reference. They were often kept by private families. Research Chartulary
The Committee of Public Safety (Comite du Salut Public) was a body elected by the French Convention on the 6th of April, 1793 from among its own members, at first having very limited powers conferred upon it - that of supervising the executive and of accelerating its actions. Subsequently, however, its powers became extended; all the executive authority passed into its hands, and the ministers became merely its scribes. It was at first composed of nine, but was increased to twelve members: Robespierre, Danton, Couthon, St-Just, Prieur, Robert-Lindet, Herault de Sechelles, Jean-Bon St-Andre, Barrere, Carnot, Collot d'Herbois, and Billaud Varennes. The severe government of this body is known as the Reign of Terror, which ended with the execution of Robespierre and his associates in July, 1794. During the commune (March to May, 1871) a similar committee was established in Paris. Research Committee of Public Safety
Ergonomics is a discipline treating the consideration of human factors in design of the working environment and its components; intended to promote productivity and safety in the tools people work with. Research Ergonomics
Factory Acts are acts passed for the regulation of factories and similar establishments. In the 18th and 19th century it was considered that women and children were not qualified fully to protect themselves against the strain of competition, and asa result the British legislature passed a series of acts to regulate the conditions of their employment in factories.
The immediate occasion of the first act passed to regulate factory employment in England was the outbreak of an epidemic disease which committed great havoc among the younger persons employed in factories in the district round Manchester at the beginning of the 19th century.
An act was passed in 1802, The Health and Morals of Apprentices Act, in which provision was made for the regular cleansing and ventilation of mills and factories, and also for limiting the hours of work to twelve daily and forbade night work for children, and made provisions for their proper accommodation.
In 1819 an act followed after Robert Owen, an important factory-owner in Scotland, demonstrated that it was possible to improve factory conditions and make profits at the same time, and later campaigned for State reform. This Act prescribed an hour and a half for meals in the course of a working day, and prohibited children under nine years of age being employed in factorywork at all.
Early Factory Acts were not enforced, and as such were impotent. In 1833 the first truly effective Factory Act was passed. This act applied to all textile factories, and stated that no child under the age of nine was to work in a mill; children under the age of 13 were restricted to working no more than nine hours in a day and children between the ages of 13 and 18 were restricted to working no more than 12 hours in a day. The vital feature of this Act was that it was successfully enforced by full-time inspectors, whose job was to see that it was obeyed in the factories.
Various acts were passed up to 1878, when a general factory and Workshop Act was passed, consolidating the previous series of statutes. Another general act was passed in 1901 and since then numerous regulations and acts have been introduced.
The original acts contained general provisions regarding drainage, sanitary conveniences, overcrowding, ventilation, fencing of dangerous machinery, etc. Addressing what we would now term health and safety.
Factories are distinguished from workshops as making use of, originally, steam or other mechanical power. In the 19th century British textile factories the hours of labour for women and young persons (the latter between 14 and 18 years of age) were restricted to 10, but only 6.5 on Saturday and 56 in the week. In 19th century British non-textile factories and workshops the hours permitted were 10.5 per day and 60 per week at most. Children (of 11 to 14 years) were still employed, but not allowed to be employed more than 6.5 hours on any one day. Provision was made for a certain number of annual holidays. Special provisions for particular kinds of factories were made by separate acts, and under these the employment of females and young persons was regulated in bleaching and dyeing works, lace-factories, manufactories of earthenware, Lucifer matches, percussion caps, cartridges, blast-furnaces, copper-mills, forges, foundries, manufactories of machinery, metal, India-rubber, gutta-percha, paper, glass, tobacco, letterpress printing, bookbinding, etc. The factory act of 1895 included laundries. Certain exceptions in regard to working overtime were provided for; thus women could sometimes work 14 hours a day. Before the start of the 20th century there was no direct interference in any of the factory acts with the labour of adult male persons but it was recognised that indirectly the position of the male-labourer was also affected by legislation of this sort, causing some consternation among the factory owners.
The factory acts were among the first employment laws formalised to protect workers, and while they originally sought to protect primarily women and children, during the 20th century they evolved into more general employment laws offering regulation and some protection to all employees, with the employment of children being stopped all together and later men being treated equally with women, an employee being considered a person irrespective of sex. Research Factory Acts
Greenpeace is an international, non-violent direct action environmental protection organisation which campaigns against and brings to public attention issues affecting the world's environment such as whaling, rainforest destruction, nuclear power and other matters which damage the environment. It is renowned for the bravery of its volunteers who engage in death-defying stunts will no apparent concern for their own safety. So successful have been their campaigns that the French government ordered and sank Greenpeace's chief ship - The Rainbow Warrior - killing some crew members who were asleep on board at the time. Research Greenpeace More information about Greenpeace
The Health and Safety Commission is a commission appointed by the Secretary of State for Employment to look after the health, safety, and welfare of people at work; to protect the public from risks arising from work activities; and to control the use and storage of explosives and other dangerous substances. It is composed of representatives from trade unions, employers, and local authorities with a full-time chairman. The Health and Safety Executive is a statutory body that advises the Commission and carries out its policies through 20 area offices. It includes HMFactory Inspectorate and a Medical Division, which itself includes the Employment Medical Advisory Service. Research Health and Safety Commission
Jacobinism, as a belief in a nationally uniform and centralised government, hostile to the division of parcellization of sovereignty remains in current political usage, especially in France. Robespierre's Jacobins established a revolutionary dictatorship when France was at war with and encircled by the reactionary European powers. Their conduct of government, through the Committee of Public Safety, gave rise to a different meaning of Jacobinism in which the Reign of Terror from 1793 to 1794 was seen as the logical end- product. In this sense Jacobinism is understood as a form of elitist insurrectionary politics, in which an elite possessed of true social and political knowledge, believes itself entitled to seize and hold political power in the name of the people. Thus Jacobinism is used pejoratively to describe groups which advocate the overthrow of the state or regime without regard to the will of the people or the majority and in this sense,
Jacobinism is often seen as a forerunner of Bolshevism. Jacobinism is also sometimes used to describe the practice of those who engage in nation- building, forging national homogeneity out of diverse peoples, without much regard to their consent. Research Jacobinism
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
Abbreviations
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