National Association of Watch and Clock Collectors, Inc.

Horological Science Chapter #161

Issue 1996-5 November 1996

Ernie Martt, editor, 278 Bentleyville Rd., Chagrin Falls, OH 44022

Phone. 216-247-6712; Fax 216-247- 1104; E-mail: emartt@cyberdrive.net

Sec. & publisher, Bill Givens, PO Box 1337, Eugene, OR 97440 Phone: (H) 503-465-9311, (W)503-465-9311; E-Mail: ibanks@ix.netcom.com

Treasurer, Everett Jones, 11929 East Hill Drive, Chesterland, OH 44026 Phone: 216-729-4811

Ernie Martt, editor 278 Bentleyville Rd. Chagrin Falls, OH 44022

Phone: 216-247-6712 E-mail: emartt@cyberdrive.net

Sec. &: Pub.: Bill Givens, PO Box 1337, Eugene, OR 07440 Phone: 503-465-9312; ibanks@ix.netcom.com

Treas.: Everett Jones, 11929 East Hill Drive, Chesterland OH 44026 Phone: 216-729-4811

For those wondering, the HSN's purpose is to foster communications between those of us who are interested in the technical aspects of horology. The idea is to cover topics that are too detailed or narrow, or preliminary to publish in standard journals. Publication here does not in any way preclude publishing in those journals. It is meant to be fun, non-commercial and innovative.

This is a brain-relaxing issue, mostly about pendulum rods of fused silica or ULE (see later), their attachment, technical properties, purchase and other interesting items.

Page Contents

1 Index

2-8 Fasteners For Quartz Pendulum Rods by Bob Matthys. Bob has surnmarized his and other's ideas.

9 Quartz Tubing As Part of Temperature Compensation by Bob Matthys.

10-11 Fixing Brass to Quartz by Roger Irving. Roger uses shellac as a binding material and gives test results.

11-12 Compression Clamp Attachment to Quartz by Dallas Cain. Dallas has tried some different methods.

13 Quartz Rod Experience by Paul Hopkins. Paul is actually using his version of a hose clamp attachment.

14 Notes on Fused Silica and ULE by Ernie Martt. Some parallel experience with mercury arc tubes.

15-23 Technical Data Index For Fused Silica and ULE by Ernie Martt. A summary from various sources.

16 Phase diagram for quartz

17 Technical data for fused silica

18-19 A supplier for fused silica

20-22 Corning's ULE (ultra low expansion) material

23 Graphs of coefficient of expansion and stability for fused silica and ULE

24 Internet News by Gordon Uber

24 Pertinent quotes from early letters by Rawlings and Shortt via George Feinstein

Ernie Martt

Above: Drawing from Apians Cosmographicus Liber of 1533, showing how a nocturnal is used to tell the time at night from the Great Bear.

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