Being untouchable no longer

Increasingly powerful voices in India are calling for a true end to discrimination based on caste.

When President Obama visits India next month, it is quite certain that he will pay tribute to Mahatma Gandhi, perceived around the world as one of history's most celebrated symbols of liberation, and a source of inspiration for the US president himself.

But there are calls within India for Obama to look further than Gandhi in paying homage to Indian heroes. For India's community of 167 million Dalits, once known as "untouchables", the true icon is Dr B R Ambedkar. Himself an untouchable, Dr Ambedkar gained doctorates from Columbia University, where President Obama, too, was educated, and at the London School of Economics, before becoming the architect of independent India's new constitution.

Relatively little-known internationally, Ambedkar has accrued almost divine status as a focal point for Dalit aspirations. Within India, Ambedkar appears everywhere. His statues easily outnumber those of Gandhi. Deep in communities of Dalits, you will hear the greeting, "Jai Bhim", meaning "hail Bhimrao [Ambedkar]". You will see his portrait in any self-assertive Dalit's home, and his name is spoken with pride. When, in 2006, the nation marked the 50th anniversary of his death, over 800,000 Dalits crowded to pay him their respects in Mumbai.

Dalits stress that, unlike the Mahatma, Ambedkar challenged the very existence of the caste system as the basis for discrimination against Dalits. It is because of Ambedkar, they say, that Dalits play any role in India's political and administrative structures – albeit a limited part. That is why anti-caste activists are urging Obama to pay homage to Ambedkar as a true giant of the cause of liberation from oppression.

These calls are just one sign of the increasingly powerful vocalisation of Dalit aspirations for recognition of their cause, and for social, economic and cultural equality. Dalit hopes for liberation from caste oppression – and it is important to add that Dalits suffer discrimination in every religious community – are resonating increasingly loudly around the world. The issue has gained profile at the United Nations, the UN Committee for the Elimination of Racial Discrimination having charged the Indian government to bring about clear improvements in a number of areas. NGOs continue to press companies investing in India to tailor their corporate social responsibility policies to address the specific challenges of caste discrimination.

Two campaigners against caste discrimination, S Anand and Meena Kandasamy, visited London last week to highlight the cause by speaking at events around a photography exhibition, "Being Untouchable".

The exhibition, by Marcus Perkins for CSW, offered a sympathetic series of portraits of the many different faces of untouchability in modern India, in a powerful reminder of the plight of the tens of millions of victims among the Dalits: the woman who cleans excrement from a dry latrine because it is her caste job; the young girl pushed into burning ashes because she walked on a path reserved for "high" castes who may never get justice; the destitute who may always be excluded from education and opportunities. Theirs are the stories that truly need to be heard amid the cacophony of coverage of India's economic boom.

Reading from her deeply moving 2006 poetry collection at the launch last week, Meena Kandasamy offered a poignant reminder of the depth of Dalit aspirations for drastic change:

We will rebuild worlds from shattered glass and
remnants of holocausts.
[. . .] It will begin the way thunder rises in our throats and we
will brandish our slogans with a stormy stress and
succeed to chronicle to convey the last stories
of our lost and scattered lives.

David Griffiths is south Asia team leader at Christian Solidarity Worldwide.

David Griffiths is an Advocacy Officer for Christian Solidarity Worldwide (CSW) - a human rights organisation which specialises in religious freedom in over 25 countries around the world
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Inside Big Ben: why the world’s most famous clock will soon lose its bong

Every now and then, even the most famous of clocks need a bit of care.

London is soon going to lose one of its most familiar sounds when the world-famous Big Ben falls silent for repairs. The “bonging” chimes that have marked the passing of time for Londoners since 1859 will fall silent for months beginning in 2017 as part of a three-year £29m conservation project.

Of course, “Big Ben” is the nickname of the Great Bell and the bell itself is not in bad shape – even though it does have a huge crack in it.

The bell weighs nearly 14 tonnes and it cracked in 1859 when it was first bonged with a hammer that was way too heavy.

The crack was never repaired. Instead the bell was rotated one eighth of a turn and a lighter (200kg) hammer was installed. The cracked bell has a characteristic sound which we have all grown to love.

Big Ben strikes. UK Parliament.

Instead, it is the Elizabeth Tower (1859) and the clock mechanism (1854), designed by Denison and Airy, that need attention.

Any building or machine needs regular maintenance – we paint our doors and windows when they need it and we repair or replace our cars quite routinely. It is convenient to choose a day when we’re out of the house to paint the doors, or when we don’t need the car to repair the brakes. But a clock just doesn’t stop – especially not a clock as iconic as the Great Clock at the Palace of Westminster.

Repairs to the tower are long overdue. There is corrosion damage to the cast iron roof and to the belfry structure which keeps the bells in place. There is water damage to the masonry and condensation problems will be addressed, too. There are plumbing and electrical works to be done for a lift to be installed in one of the ventilation shafts, toilet facilities and the fitting of low-energy lighting.

Marvel of engineering

The clock mechanism itself is remarkable. In its 162-year history it has only had one major breakdown. In 1976 the speed regulator for the chimes broke and the mechanism sped up to destruction. The resulting damage took months to repair.

The weights that drive the clock are, like the bells and hammers, unimaginably huge. The “drive train” that keeps the pendulum swinging and that turns the hands is driven by a weight of about 100kg. Two other weights that ring the bells are each over a tonne. If any of these weights falls out of control (as in the 1976 incident), they could do a lot of damage.

The pendulum suspension spring is especially critical because it holds up the huge pendulum bob which weighs 321kg. The swinging pendulum releases the “escapement” every two seconds which then turns the hands on the clock’s four faces. If you look very closely, you will see that the minute hand doesn’t move smoothly but it sits still most of the time, only moving on each tick by 1.5cm.

The pendulum swings back and forth 21,600 times a day. That’s nearly 8m times a year, bending the pendulum spring. Like any metal, it has the potential to suffer from fatigue. The pendulum needs to be lifted out of the clock so that the spring can be closely inspected.

The clock derives its remarkable accuracy in part from the temperature compensation which is built into the construction of the pendulum. This was yet another of John Harrison’s genius ideas (you probably know him from longitude fame). He came up with the solution of using metals of differing temperature expansion coefficient so that the pendulum doesn’t change in length as the temperature changes with the seasons.

In the Westminster clock, the pendulum shaft is made of concentric tubes of steel and zinc. A similar construction is described for the clock in Trinity College Cambridge and near perfect temperature compensation can be achieved. But zinc is a ductile metal and the tube deforms with time under the heavy load of the 321kg pendulum bob. This “creeping” will cause the temperature compensation to jam up and become less effective.

So stopping the clock will also be a good opportunity to dismantle the pendulum completely and to check that the zinc tube is sliding freely. This in itself is a few days' work.

What makes it tick

But the truly clever bit of this clock is the escapement. All clocks have one - it’s what makes the clock tick, quite literally. Denison developed his new gravity escapement especially for the Westminster clock. It decouples the driving force of the falling weight from the periodic force that maintains the motion of the pendulum. To this day, the best tower clocks in England use the gravity escapement leading to remarkable accuracy – better even than that of your quartz crystal wrist watch.

In Denison’s gravity escapement, the “tick” is the impact of the “legs” of the escapement colliding with hardened steel seats. Each collision causes microscopic damage which, accumulated over millions of collisions per year, causes wear and tear affecting the accuracy of the clock. It is impossible to inspect the escapement without stopping the clock. Part of the maintenance proposed during this stoppage is a thorough overhaul of the escapement and the other workings of the clock.

The Westminster clock is a remarkable icon for London and for England. For more than 150 years it has reminded us of each hour, tirelessly. That’s what I love about clocks – they seem to carry on without a fuss. But every now and then even the most famous of clocks need a bit of care. After this period of pampering, “Big Ben” ought to be set for another 100 or so years of trouble-free running.

The Conversation

Hugh Hunt is a Reader in Engineering Dynamics and Vibration at the University of Cambridge.

This article was originally published on The Conversation. Read the original article.