<HTML><HEAD></HEAD> <BODY style="BORDER-TOP-STYLE: none; BORDER-RIGHT-STYLE: none; BORDER= -LEFT-STYLE: none; BORDER-BOTTOM-STYLE: none"> Time for the digital = camera... David Ilvedson, RPT Pacifica, California <BR= > <DIV style="PADDING-RIGHT: 5px; PADDING-LEFT: 5px; PADDING-BOTTOM: 5p= x; BORDER-LEFT: #000000 3px solid; PADDING-TOP: 5px"> <HR> Original message From: "Aaron Bousel" <ABOUSEL@COMCAST.NET> To: "= College and University Technicians" <CAUT@PTG.ORG> Received: 2/21/20= 06 10:11:19 AM Subject: Re: [CAUT] Another first I thought I'd seen every possible configuration of a ve= rtical piano over the past three decades, but I saw one recently that w= as new to me. This is an Estey made in 1891. I'm attaching a sketch I m= ade but here's how this is supposed to work. The backcheck is in two pa= rts, and pivots by a center pin towards the top. There is a coil spring= towards the bottom. The idea is that upon release of the hammer from c= heck the backcheck will give a little push on the catcher, just enough = to help the jack get back against the butt felt. There's a set screw at= the very top of the backcheck which limits the travel of the piece tha= t pushes the catcher. The piano was in such poor condition that there w= as no way I could see if this theory actually worked in practice, thoug= h I don't see why it wouldn't. <IMG height=627 alt=[] src="cid:7.= 0.0.16.2.20060221130054.025c3780@comcast.net.0" width=628> Aaron<= BR> <X-SIGSEP> </X-SIGSEP>--------------------------= ---------------- Aaron Bousel Registered Piano Technician, Piano = Technicians Guild abousel@comcast.net (413) = 253-3846 (voice & fax) </DIV></BODY></HTML>