<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31447308</termId><termName>centripetal spring chairs</termName><termType>PT</termType><termNote><![CDATA[ Reclining chairs with a spring concealed under the seat which allows the chairs to recline and then snap into place; attributed to the American Chair Company, Troy, NY, about 1850. ]]></termNote><termCreatedDate>2026-03-30 21:00:26</termCreatedDate><relation><relationType>UF</relationType><termId>31447309</termId><termName>centripetal spring chair</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31447310</termId><termName>chairs, centripetal spring</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31447311</termId><termName>spring chairs, centripetal</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31475019</termId><termName>reclining chairs</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31424700</termId><termName>patent furniture</termName><termType>PT</termType></relation></term>  </Zthes>