A New or Improved Screw Spanner.
Year: 1896

page_text: Date of Application, 9th Sept., 1896-Accepted, 31st Oct., 1896
COMPLETE SPECIFICATION.
A New or Improved Screw Spanner.
We, WILHELM MULLER and WILHELM MÜSSEN both of 15 Friesenstrasse,
Hanover, in the Empire of Germany, Merchants 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 :-
The present invention relates to a screw-spanner which has the great advantage
that it holds the nut or the head of a screw or bolt continuously whilst the screw
is being tightened or screwed up. By this means it obviates the great loss of time
caused by replacing the spanner. This is effected by arranging the handle so as to
enable it to slip over a ratchet wheel when it is being turned back, whilst when it
is turned in the forward direction it engages with the said ratchet wheel and thereby
operates the spanner in an intermittent or periodical manner.
The improved spanner is illustrated in the accompanying drawings in which :-
Figure 1 is a view in back elevation
Figure 2 a view in side elevation, partly in section, and
Figure 3 is a view in front elevation of the said spanner.
Throughout the views similar parts are marked with like letters of reference.
The construction of the spanner is as follows:-The jaws c are capable of being
shifted or adjusted in the slot b of the part a by means of the pins or studs d. The
jaws c are shifted by means of a right and left hand screw threaded spindle e which
is adapted to be rotated laterally by means of a thumb nut f, so that on rotating
the spindle e in a suitable manner the jaws c can be adjusted to the size of the nut.
or head of the screw or bolt. A ratchet wheel g is fixed on the part a. This
ratchet wheel carries a pin about which the handle i is arranged so as to be
capable of rotation. In the handle there is provided a bolt k acted upon by
the spring . This bolt k bears against the teeth of the ratchet wheel 9 or
slips over the same according as the handle is turned towards the left hand or to
the right hand. On turning the handle in the direction of the arrow the ratchet
wheel and consequently also the whole spanner is carried round with it.
This construction affords the great advantage that the spanner need not be
removed from the nut or head of the screw or bolt whilst it is being turned.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
(1.) A screw spanner, substantially as hercin before described and shewn on the
accompanying drawings.
(2.) A screw spanner characterized by the fact that the handle is capable-
of being rotated around a pin provided on the head of the spanner, whilst a
bolt k situated in the interior of the handle i and acted upon by a spring 1 bears
against the teeth of a ratchet wheel g fixed to the head of the spanner when the
nut is being screwed up, whilst when the handle is turned backwards the bolt k
slips over the teeth of the ratchet wheel.
Dated this Oth dem
2000
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,.
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Associate Agent.