Improvements in or relating to Screw Drivers.
Year: 1892

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to Screw Drivers.
I GEORGE MARTIN of 61 Brook Street Smethwick Glazier do hereby declare
the nature of my said invention and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement:-
This invention relates to improvements in screw drivers, of that kind employed
by carpenters, machinists and others, for driving screws or parts that are screwed.
For driving wood or other screws, I construct a handle or stock of wood by
preference of a required length, shape or configuration, externally, provided with
a hole, along the axial length, this hole receives a quick threaded screw and at the
one end of the handle is a female screwed nut corresponding to the pitch of the
quick threaded screw and through which it passes, the outer end of this quick
threaded screw receives the blade for engaging the nick or slot in the screw head.
When the quick threaded screw is projecting from the nut and from the handle or
stock to its full extent it may be applied to its purpose effected in the following
manner.
By placing the blade in the nick of the screw and applying pressure to the upper
part of the handle or stock by the person employing the same, the nut is forced
against the highest point of the quick thread screw. This causes a motion of
rotation to the quick thread screw which is conveyed to the screw and thus driven.
It is important that the blade in the nick of the screw head should remain in that
position until the screw is driven home, in some cases to effect this it would be
necessary to raise the handle and repeat the movement, this is carried out by a
ring working in a groove at a convenient part of the handle or stock. The
advantages are saving of labor and time.
And in order that this my said invention may be more clearly understood, I will
now proceed to describe the same more fully. Reference being made to the sheet
of drawings, to the figures and letters marked thereon that is to say:
Fig. 1 is a view in elevation shewing a screw driver constructed according to my
invention, when not in use.
Fig. 2 is a view in elevation, sectional of the same ready for use.
The same letters of reference indicate like or corresponding parts on each
figure.
a. is the handle or stock, b. is the hole, . is the quick threaded screw bar (con-
structed in various ways), e' is the blade, d. is the female nut securely fixed to a.
at a any movement being prevented by the webs e. e, which are let into u. f. is a
washer pinned or rivetted on to c. and being somewhat larger prevents c. passing
through d., and becoming detached. g. is a ferrule of the ordinary kind secured
upon a., . is a ring moving freely in the groove, i, this is clearly understood by
reference to Fig. 2:
The above being my invention I wish to observe in conclusion that I do not
limit myself to the precise detail herein specified and shewn but may modify without
departing from the principle.
Having now particularly described and ascertained the nature of my said inveu-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1st. Constructing a screw driver, having the handle or stock a with the hole b.,
for receiving the quick thread screw bar c., passing into, and actuated by, the
female screwed nut . for imparting a rotary motion conveyed to c¹. assisted by the
ring, moving in i. substantially as hereinbefore set forth and described.

page_text: 2nd. The general construction combination and arrangement of parts, substan-
tiallyas hereinbefore described in the foregoing Specification and shewn upon the
accompanying sheet of drawings.
Dated 9th Januar 1805
THOS. KENDRICK,
Agent.