Improvements in Adjustable Screw Keys or Spanners, and in the Manufacture thereof.
Year: 1897

page_text: Date of Application, 21st Oct., 1897-Accepted, 27th Nov., 1897
COMPLETE SPECIFICATION.
Improvements in Adjustable Screw Keys or Spanners, and in the
Manufacture thereof.
I SAMUEL COOK of Albert Works, Bury, in the County of Lancaster, Machine
Maker, do hereby declare the nature of this invention and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement:-
My said invention relates to improvements in screw keys or spanners and in the
manufacture thereof.
According to my said invention described with reference to the accompanying
drawing I take a flat piece of metal a as shown at Fig. 1 suitably shaped to form the
outer edge of the head a¹ of a spanner for gripping four sides of a hexagonal or
square nut or bolt head.
Out of this piece of metal a I stamp out the part 6 shown at Fig. 2 and indicated
in dotted lines in Fig. 1 which when the part B is cut or stamped off forms the loose
Y shaped jaw b¹ (Fig. 4). There is thus no waste of metal since the piece removed
to form the slot forms the blank from which the part which works therein is made.
From the remaining portion of the plate having a longitudinal slot 8 are cut the
transverse slots a² in which lies the rotatable nut c (Fig. 5) engaging on the screwed
tail piece b² and travelling in the slot s. The end of the screwed tail piece 62 is formed
with a rounded nose b³ as shown at Fig. 4 and in dotted lines at Fig. 2 and engages
with a notch or recess 6* formed in the sliding jaw d (Figs. 6 and 64). Two plates e
(one at each side of the screwed tail piece 62) form the handle and are stamped out
or otherwise shaped as shown in Fig. 7 with parts el forming the fixed jaw of an open
jaw spanner for gripping two sides of a nut or bolt head. The said plates e are
provided with slots e2 through which the rotatable nut c projects as shown in elevation
at Fig. 8 and in end view at Fig 8^. Between the two plates e and at the part e¹ I
insert a plate f (Figs. 7 and 8^) to form a strengthening piece and at the same time
to form a broad surface for the nut or bolt head to come against when between the
fixed jaw e¹ and the sliding jaw d.
The sliding jaw d (shown in elevation at Fig. 6 and in end elevation at Fig. 6A)
slides between the two plates e.
The various parts forming the spanner are placed together in the following
manner.
The tail piece b² (Fig. 4) having the rotatable nut c (Fig. 5) screwed thereon and
the tail piece b' connected to the sliding jaw d are placed in the slot 8 with a plate e
at each side. The strengthening plate ƒ (Fig. 7) is then placed between the two
plates e and the various parts are secured together by means of rivets g passing
through the holes g¹.
On rotating the nut c the Y shaped jaw b¹ and sliding jaw d are operated
simultaneously.
Where only a single ended spanner is to be made the sliding jaw d and the end
piece el are omitted in which case the handle will terminate at the dotted line k in
Fig. 8.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is :-
1. The combination in a screw key or spanner of a closed head a¹ a Y shaped jaw b¹
a screw tail piece g² formed integral therewith and a nut c for operating the same
substantially as set forth and shown.
TewnG
2. In a screw key or spanner "the combination of a closed head ¹ a movable
Y shaped jaw b¹ such as described a sliding jaw d operated simultaneously with the
jaw b¹ and forming with the part el an open jaw substantially as set forth.
3. The process of making a screw key with a closed head a¹ by stamping out from
a blank such as Fig. 1 a piece such as Fig. 2 in order to form simultaneously a slot
for the sliding jaw and its tail piece and the blank (such as Fig. 2) for the sliding
piece itself substantially as set forth and shown.
1
1011
1
1007
E. T. WHITELOW, A.M. Inst. C.E.,
70 Deansgate, Manchester, Agent for the Applicant.