host = $host; $this->dbUser = $dbUser; $this->dbPass = $dbPass; $this->dbName = $dbName; $this->connectToDb(); } /** * Establishes connection to MySQL and selects a database * @return void * @access private */ function connectToDb() { // Make connection to MySQL server if (!$this->dbConn = @mysql_connect($this->host, $this->dbUser, $this->dbPass)) { trigger_error('Could not connect to server'); $this->connectError = true; // Select database } else if (!@mysql_select_db($this->dbName,$this->dbConn)) { trigger_error('Could not select database'); $this->connectError = true; } } /** * Checks for MySQL errors * @return boolean * @access public */ function isError() { if ($this->connectError) { return true; } $error = mysql_error($this->dbConn); if (empty($error)) { return false; } else { return true; } } /** * Returns an instance of MySQLResult to fetch rows with * @param $sql string the database query to run * @return MySQLResult * @access public */ function &query($sql) { if (!$queryResource = mysql_query($sql, $this->dbConn)) { trigger_error('Query failed: ' . mysql_error($this->dbConn) . ' SQL: ' . $sql); } else { return new MySQLResult($this, $queryResource); } } } /** * MySQLResult Data Fetching Class * @access public * @package SPLIB */ class MySQLResult { /** * Instance of MySQL providing database connection * @access private * @var MySQL */ var $mysql; /** * Query resource * @access private * @var resource */ var $query; /** * MySQLResult constructor * @param object mysql (instance of MySQL class) * @param resource query (MySQL query resource) * @access public */ function MySQLResult(&$mysql, $query) { $this->mysql = &$mysql; $this->query = $query; } /** * Fetches a row from the result * @return array * @access public */ function fetch() { if ($row = mysql_fetch_array($this->query, MYSQL_ASSOC)) { return $row; } else if ( $this->size() > 0 ) { mysql_data_seek($this->query, 0); return false; } else { return false; } } /** * Returns the number of rows selected * @return int * @access public */ function size () { return mysql_num_rows($this->query); } /** * Returns the ID of the last row inserted * @return int * @access public */ function insertID () { return mysql_insert_id($this->mysql->dbConn); } /** * Checks for MySQL errors * @return boolean * @access public */ function isError() { return $this->mysql->isError(); } /** * Returns an instance of MySQLResult to fetch rows with * @param $sql string the database query to run * @return MySQLResult * @access public */ } ?> Model Fire Escape - Birmingham Museums & Art Gallery Information Centre
             
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Model Fire Escape

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Birmingham Museums and Art Gallery

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Basic Information

Accession Number:1943F28
Collection:Social History
Date:1828 - 1828

Maker Information

Inventor:Abraham Wivell - View biography for Abraham Wivell

Notes

When lecturing on the subject of his new invention, Abraham Wivell used a series of scale models. To operate this fire escape, the fly ladder was swung into position by means of ropes and access to the main ladder was obtained by opening the hinged section of the fly. A rescued person could be passed down the canvas chute beneath the ladder. The Lattice Girder Extending Escape, which was patented by James Shand in 1880, eventually superseded Wivell's ladder.


Further Information

Production Period:19th century
Material(s):Gauze

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