Typed report on percussive drill bits, week ending 20 Aug 1949. Contains handwritten notes and photographs of the drill bits.

Archive Unit

For more information, email the repository
Advice on accessing these materials
Cite this description
Bookmark:http://archiveshub.jisc.ac.uk/data/gb214-d624/d624/4/9/5/1

This material is held at
Reference
Dates of Creation
Physical Description

Archive Record|Table of contents

Douglas Simpson, Colliery Manager, PapersD624

Photographs and negativesD624/2

Abercynon CollieryD624/4/1

Abernant CollieryD624/4/2

Cwmgorse CollieryD624/4/3

Llanharan CollieryD624/4/4

Nantgarw CollieryD624/4/5

Taff Merthyr CollieryD624/4/6

National Coal BoardD624/4/7

TestsD624/4/8

Locomotives and machineryD624/4/9

Battery locomotivesD624/4/9/1

Underground locomotive garagesD624/4/9/2

Conway loadersD624/4/9/3

Machinery breakdown recordsD624/4/9/4

Percussive drillingD624/4/9/5

Typed report on percussive drill bits, week ending 20 Aug 1949. Contains handwritten notes and photographs of the drill bits.D624/4/9/5/1

Article on rubber collar shanks with correspondence from G. J. Gellie of Holmans JohannesburgD624/4/9/5/2

Bit consumption at Nantgarw CollieryD624/4/9/5/3

Record of drilling performance of drill steels supplied by Holman Bros used in the underground development of Nantgarw CollieryD624/4/9/5/4

List of illustrations to paper ‘Percussive drilling in hard rock’ by D. Simpson and V.S. ParryD624/4/9/5/5

List of illustrations for paper (unknown)D624/4/9/5/6

Other reportsD624/4/9/6

ExplosionsD624/4/10

Intensive stonedriftingD624/4/11

DraftsD624/4/12

Other reportsD624/4/13

PapersD624/5

Plans, drawings, charts and diagramsD624/6

NotebooksD624/7

Handwritten notes and other papersD624/8

Social eventsD624/9

MagazinesD624/10

Catalogues and advertisementsD624/11

Information bookletsD624/12

Operating instructionsD624/13

CorrespondenceD624/14