IMPROVEMENTS IN TOOL HOLDERS FOR SCREWING AND OTHER MACHINES
Year: 1884

page_text: I ALEXANDER MOILQUHAM, of Broomgrove Haughton near Manchester in the
County of Lancaster Engineer & Machinest do hereby declare the nature of the
said invention for IMPROVEMENTS IN TOOL HOLDERS FOR SCREWING AND OTHER
MACHINES, to be as follows:-
This invention has for its object improvements in apparatus for Holding tools
for Screw Cutting or Chaseing.
I make the dies for use in Screw Cutting or Chaseing Machines of conciderable
length and drill groves at fixed points to recive the points of set screws, such set
screws being taped into a die holder, the dies being held firmn by the die Holders
Each die as it becomes shorter by wear can be moved inward from grove to grove.
I set up the dies by means of an Eccentric slot plate in the manner at presant
practised and have die Holders, die rests, and Ferrals bolted firmly through screwing
head and slot plate to keep the Screwing or Chaseing dies firm to there work.
T
1
AAL
ALEXANDER M'ILQUHAM,
Engineer & Machinist,
Haughton, near Manchester.

page_text: I ALEXANDER MILQUHAM Engineer & Machinest of Broomgrove Haughton in
the County of Lancaster do hereby declare the nature of my invention for
TOOL HOLDERS FOR SCHEWING AND OTHER MACHINES and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:-
This invention has for its object imprivements in apperatus for holding tools
for Screw Cutting or Chaseing.
I make the dies for use in Screw Cutting or Chascing Machines of considerable
length & drill groves at fixed points to recive the points of set screws, such set
screws being tapped into a die holder they being held firm by the die holder,
Each die as it becomes shorter by wear can be moved inward from grove to grove.
I set up the dies by means of an eccentric slot plate in the manner shown in
Fig. 1, Fig. 1 of the drawings showes in front Elevation a screwing or chaseing
head with my improvements. Fig. 2 is a sectional plan. Fig. 3 is a front Elevation
of slot plate, Fig. 4 & 5 are front elevation and side section of die rest, Fig. 6 is
Bide view of Tool Holder, Fig. 7 and 8 is section of Forrule, In the chaseing head
are placed the three rests a a a with sutable projections for steadying Dies.
The three dieholders B B B are slotted through their heads to receive suteble
dies 9, 9, 9, and fitted into the three resta a, a, a, and sufficiently long to go
through chasoing head and slot plate, slots c, c, c, and screw firm to ferrule D, D, D,
and D. 6, and with three set screws E, E, E to keep dies raidicly correct, It will
be seen that the following advantages result from my Invention that I am enabled
to use dies that are of such a length that will allow of them being recut from time
to time, The rests & die holders are quickly taken out & replaced, any of the
dies can be taken out independant of tho others & the dies can be resett midiely
by set screws E & tightly held firm to rest & steady to screwing or chaseing head
by tighting up nuts F F F F while the rests a, a, a holds the chaseing tool firm.
Haveing described the nature of my Invention and explained the mode of
carrying the same into practicle effect I hereby declare that what I concider to
be noval & origional & therefore claim as the invention secured to me by herein
before in part recited letters patent is
The improved arrangment & apperatus for holding dies for screw cutting or
chaseing herein before discribed & shown in the drawings wherein long dies are
held firm in die holders & supported by the rests and by such die holders being
passed through the rest, Ferrule, chaseing head & slot plate held tight with a nut
& Washer against the ferrule and the chaseing or screwing die.
Dated this first day of Santambor 1005