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Dennis N-Type
The Dennis N-Type is a model of commercial vehicle introduced by Dennis Brothers of Guildford (later Dennis Specialist Vehicles) in around 1905. It was the basis for their early fire engines and trucks. Specification The "N-Type" chassis was constructed from rolled steel channel; riveted and braced at appropriate points. It incorporated a sub frame on which the engine and gearbox were mounted. As for later Dennis fire engines, the water pump was a centrifugal pump, rather than the piston pumps used by other makers. This was more complex to build than the long-established piston pumps, but had advantages in operation. Where water was supplied under pressure from a hydrant, rather than by suction from a pond, this additional pressure was boosted through the centrifugal pump, whereas a piston pump would have throttled it. Piston pumps also gave a pulsating outlet pressure which required an air-filled receiver to even this out. A drawback of the usual centrifugal design was the cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fire Hydrant
A fire hydrant, waterplug, or firecock (archaic) is a connection point by which firefighters can tap into a water supply. It is a component of active fire protection. Underground fire hydrants have been used in Europe and Asia since at least the 18th century. Above-ground pillar-type hydrants are a 19th-century invention. History Before piped mains supplies, water for firefighting had to be kept in buckets and cauldrons ready for use by ' bucket-brigades' or brought with a horse-drawn fire-pump. From the 16th century, as wooden mains water systems were installed, firefighters would dig down to the pipes and drill a hole for water to fill a “wet well” for the buckets or pumps. This had to be filled and plugged afterwards, hence the common US term for a hydrant, 'fireplug'. A marker would be left to indicate where a 'plug' had already been drilled to enable firefighters to find ready-drilled holes. Later wooden systems had pre-drilled holes and plugs. When cast-iron pipe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commercial Motor
''Commercial Motor'' is a weekly magazine serving the road transport industry in the United Kingdom. Founded in 1905 by Edmund Dangerfield, it is notable for having been "the first journal to be devoted exclusively to the commercial vehicle engaged in the conveyance of goods or in passenger carrying". Originally named ''The Commercial Motor'', the title was shortened to ''Commercial Motor'' for the first issue of 1966. The publication is commonly referred to as 'CM' by its readers and editorial staff. ''Commercial Motor'' was initially published by Temple Press and since 2011 it has been published by Road Transport Media. Launch ''The Commercial Motor'' was launched in March 1905 by Temple Press. In the leader of the first issue it described itself as a "missionary and educative medium". For the first issue on 16 March, 20,000 copies were issued "in Britain and other countries, with the hope that the normal weekly circulation would be at least 5,000". Composition The content ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RCS Motor Club
The Royal College of Science Motor Club was set up in 1955 to maintain "Jezebel", a 1916 Dennis N-Type fire engine and a mascot of the students of the Royal College of Science, one of the founding three colleges of Imperial College London, in South Kensington. Jezebel Jezebel is a Dennis N-Type fire engine that was one of a batch of ten vehicles ordered in October 1915 by the London County Council for the London Fire Brigade. It was delivered in April 1916 and initially based Vauxhall, but sometime around 1919 was moved to Pageants Wharf Fire Station, Rotherhithe Street, London. In 1932, the London Fire Brigade upgraded to new appliances and Jezebel was sold to a Joseph Crosfield, a subsidiary of Unilever that manufactured chemicals and soap and was based in Warrington, Cheshire. The company's in-house, private fire brigade operated the engine until 1955, when it was donated it to the Royal College of Science Union for use as official transport of the Union President. Sin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander Dennis
Alexander Dennis is a British bus manufacturing company based in Larbert, Scotland. The largest bus and coach manufacturer in the United Kingdom with a 50% market share in 2019, it has manufacturing plants and partnerships in Canada, China, Europe, Hong Kong, Malaysia, New Zealand, Singapore, South Africa and the United States. History TransBus - the precursor of Alexander Dennis Mayflower Corporation acquired Scottish bus-makers, Walter Alexander, in August 1995 and English bus-makers, Dennis Group, in October 1998. In 2000, Mayflower and Henlys Group merged their British bus-making operations into a 70:30 joint venture with Alexander, Dennis and Henlys' Plaxton merged to form TransBus International. The factories concerned employed 3,300 staff in seven places in England ( Anston, Guildford, Scarborough and Wigan), Scotland (Falkirk) and Northern Ireland (Belfast). Plaxton's Scarborough operations was planned to close on 3 May 2001 with the loss of 700 jobs blamed on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coventry
Coventry ( or ) is a City status in the United Kingdom, city in the West Midlands (county), West Midlands, England. It is on the River Sherbourne. Coventry has been a large settlement for centuries, although it was not founded and given its city status until the Middle Ages. The city is governed by Coventry City Council. Historic counties of England, Formerly part of Warwickshire until 1451, Coventry had a population of 345,328 at the 2021 census, making it the tenth largest city in England and the 12th largest in the United Kingdom. It is the second largest city in the West Midlands (region), West Midlands region, after Birmingham, from which it is separated by an area of Green belt (United Kingdom), green belt known as the Meriden Gap, and the third largest in the wider Midlands after Birmingham and Leicester. The city is part of a larger conurbation known as the Coventry and Bedworth Urban Area, which in 2021 had a population of 389,603. Coventry is east-south-east of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White And Poppe
White and Poppe Limited owned a Coventry proprietary engine building and gearbox manufacturing business established in 1899. Many early motor vehicle manufacturers making only a small number of vehicles bought in their major components and White and Poppe soon had a large customer base and by 1914 a staff of around 350 people. By then the number of these customers, once as high as 15 or more, had fallen away though not the production volume leaving Dennis Brothers, always an important customer, taking much of their output. Negotiations begun in 1914 culminated in the purchase of White and Poppe by Dennis Brothers in 1919. White and Poppe remained a distinct entity but during the Great Depression Dennis Brothers elected to reduce overheads by manufacturing its own engines in their Surrey works and source ''Diesel'' engines elsewhere and closed White and Poppe's operation, finally disposing of their Coventry buildings and unwanted plant and machinery in mid 1933. Proprietors This ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thrust Bearing
A thrust bearing is a particular type of rotary bearing. Like other bearings they permanently rotate between parts, but they are designed to support a predominantly axial load. Thrust bearings come in several varieties. *''Thrust ball bearings'', composed of bearing balls supported in a ring, can be used in low thrust applications where there is little axial load. *''Cylindrical thrust roller bearing''s consist of small cylindrical rollers arranged flat with their axes pointing to the axis of the bearing. They give very good carrying capacity and are cheap, but tend to wear due to the differences in radial speed and friction which is higher than with ball bearings. *'' Tapered roller thrust bearings'' consist of small tapered rollers arranged so that their axes all converge at a point on the axis of the bearing. The length of the roller and the diameter of the wide and the narrow ends and the angle of rollers need to be carefully calculated to provide the correct taper so that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piston Pump
A piston pump is a type of positive displacement pump where the high-pressure seal reciprocates with the piston. Piston pumps can be used to move liquids or compress gases. They can operate over a wide range of pressures. High pressure operation can be achieved without adversely affecting flow rate. Piston pumps can also deal with viscous media and media containing solid particles. This pump type functions through a piston cup, oscillation mechanism where down-strokes cause pressure differentials, filling of pump chambers, where up-stroke forces the pump fluid out for use. Piston pumps are often used in scenarios requiring high, consistent pressure and in water irrigation or delivery systems. Types The two main types of piston pump are the lift pump and the force pump. Both types may be operated either by hand or by an engine. Lift pump In a lift pump, the upstroke of the piston draws water, through a valve, into the lower part of the cylinder. On the downstroke, water passes thr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commercial Vehicle
A commercial vehicle is any type of motor vehicle used for transporting goods or paying passengers. The United States defines a "commercial motor vehicle" as any self-propelled or towed vehicle used on a public highway in interstate commerce to transport passengers or property when the vehicle: :1. has a gross vehicle weight rating of 4,536 kg (10,001 pounds) or more :2. Is designed or used to transport more than 8 passengers (including the driver) for compensation; :3. Is designed or used to transport more than 15 passengers, including the driver, not used to transport passengers for compensation; :4. Is used in transporting material found by the Secretary of Transportation to be hazardous. The federal definition though followed closely is meant to accommodate and remain flexible to each state's definitions. The European Union defines a "commercial motor vehicle" as any motorized road vehicle, that by its type of construction and equipment is designed for, and capable ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centrifugal Pump
Centrifugal pumps are used to transport fluids by the conversion of rotational kinetic energy to the hydrodynamic energy of the fluid flow. The rotational energy typically comes from an engine or electric motor. They are a sub-class of dynamic axisymmetric work-absorbing turbomachinery. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from which it exits. Common uses include water, sewage, agriculture, petroleum, and petrochemical pumping. Centrifugal pumps are often chosen for their high flow rate capabilities, abrasive solution compatibility, mixing potential, as well as their relatively simple engineering. A centrifugal fan is commonly used to implement an air handling unit or vacuum cleaner. The reverse function of the centrifugal pump is a water turbine converting potential energy of water pressure into mechanical rotational energy. His ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Pump
A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action, typically converted from electrical energy into hydraulic energy. Pumps can be classified into three major groups according to the method they use to move the fluid: ''direct lift'', ''displacement'', and ''gravity'' pumps. Mechanical pumps serve in a wide range of applications such as pumping water from wells, aquarium filtering, pond filtering and aeration, in the car industry for water-cooling and fuel injection, in the energy industry for pumping oil and natural gas or for operating cooling towers and other components of heating, ventilation and air conditioning systems. In the medical industry, pumps are used for biochemical processes in developing and manufacturing medicine, and as artificial replacements for body parts, in particular the artificial heart and penile prosthesis. When a casing contains only one revolving impeller, it is called a single-stage pump. Whe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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