Improvements in Washers for Bolts and Nuts.
Year: 1894

page_text: Date of Application, 19th Feb., 1894
Complete Specification Left, 19th Nov., 1894-Accepted, 22nd Dec., 1894
PROVISIONAL SPECIFICATION.
[Communicated from abroad by ROBERT HENRY HARWOOD, of Howrah Mills,
Seebpore, Calcutta, India, Engineer.]
Improvements in Washers for Bolts and Nuts.
I, ROBERT HARWOOD of Vale Bank, Bolton in the County of Lancaster,
Manager, do hereby declare the nature of my said invention to be as follows:-
This invention relates to improvements in washers for bolts and nuts and consists
in means to allow of the nuts adjusting themselves in case of irregularities of the
bearing surface to ensure of a firmer or more solid grip being established. This I
carry into effect by making the washer in halves in globular form, one being
concaved and the other convexed; the upper portion being free to swivel in any
direction on the bottom portion to accommodate itself to the face or bearing
surface of the nut when being screwed on the end of the bolt, thereby ensuring of
the nut firmly bedding itself thereon.
Dated the 17th February 1894.
I, ROBERT HARWOOD of Vale Bank, Bolton in the County of Lancaster,
Manager, 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 washers for bolts and nuts and consists
in means to allow of the nuts adjusting themselves in case of irregularities of the
bearing surface to ensure of a firmer or more solid grip being established. This I
carry into effect by making the washers in halves with faces of globular form, one
being concaved and the other convexed; the upper portion being free to swivel in
any direction on the bottom portion to accommodate itself to the face or bearing
surface of the nut when being screwed on the end of the bolt, thereby ensuring
of the nut firmly bedding itself thereon.
Fig. 1 is a sectional elevation of my invention through line A B in Fig. 2.
Fig. 2 is a plan of Fig. 1.
Fig. 3 an outside view of Fig. 1, and
Fig. 4 a sectional elevation showing how the upper portion of washer adjusts
itself to compensate for irregularities of the bearing surface.
The washer is made in halves, the bottom of the upper portion C is convexed,
and the upper side of the lower portion D is concaved, so that when placed
together they fit each other and form a complete adjustable washer. By making
the washer in halves and in globular form, that is, one part being concaved and
the other convexed, the upper portion C is free to swivel in any direction on the

page_text: bottom or concaved portion of the part D to accommodate itself to the face or
bearing surface of the nut when being screwed on the end of the bolt, thereby
ensuring of the nut firmly bedding itself thereon.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The use and construction of washers made in halves with faces of globular form,
the upper part being convexed on its lower face and the bottom part concaved on
its upper face, substantially as described and as shown in the drawings for the
purpose specified.
Dated the 16th November 1894.
EDMUND CHADWICK, F.I.C.P.A.,
Agent..