Year: 1888

page_text: Date of Application, 9th May, 1888
Complete Specification Left, 9th Feb., 1889
Complete Specification Accepted, 9th May, 1889
I, EDWARD Cox WALKER Electrical Engineer of Highfield Coniscliffe Road, &
Feethams Darlington do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in Electro Magnetic and Magneto Electric
Generators, suitable for actuating bells, indicators and other electric signals &
apparatus and has for its object greater simplicity in construction and increased
efficiency in working.
According to my invention I employ an armature & permanent or other magnets
of ordinary or any suitable construction but I dispense with the toothed or frictional
multiplying gear usually employed to transinit a rotary motion to the armature and in
lieu thereof, I, in some cases, make use of a rapid pitch screw, such as is employed
in an ordinary Archimedian drill, which may engage in the hollow spindle of the
armature, causing the latter to rotate rapidly, when pushed in or pulled out, or
which may be connected to one extremity of the said spindle, or fashioned on an
extension of the same and engage in a suitable nut forming the handle, which causes
the armature to rotate when reciprocated from end to end of the said screw, or I
sometimes arrange the armature so that it rotates on its axis through only a small
arc the extent of the movement being in some cases regulated by fixed limiting
stops or buffers and the requisite motion being conveniently imparted to the
armature by means of a suitable arm or finger piece on the armature, spindle, or
otherwise; or I attach a handle or other conveniently shaped piece to the spindle of
the armature direct, to wholly or partially rotate the armature on its axis, or I wholly,
or partially rotate the permanent or other magnets around or about the armature.
similarly.
1
1000

page_text: EDWARD COX WALKER, Engineer Feethams Darlington 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 :-
This invention relates to improvements in electro-magnetic and magneto electric
generators suitable for actuating bells, indicators and other electric signals and
apparatus and has for its object greater simplicity in construction and increased
efficiency in working.
According to my invention I employ an armature A wound with insulated con-
ducting wire and permanent or other magnet or magnets of ordinary or any suitable
construction, but I dispense with the toothed or frictional multiplying gear usually
employed to transmit a sufficiently rapid rotary motion to the armature and in lieu
thereof I in some cases make use of a rapid pitched screw spindle B such as is
employed in ordinary Archimedean drills, which screwed spindle is arranged to work
inside the hollow spindle of the armature and to engage in a nut C forming part of
or attached to the latter so as to cause the armature spindle. and armature to rotate
rapidly when the screwed spindle is pushed in or pulled out.
Or I fashion the rapid pitch screw B thread on one extremity of the armature
spindle which is prolonged for this purpose or attach the screwed spindle to the
end of the armature spindle, arranging a nut C which forms a handle on the screwed
spindle so that when the nut is taken hold of and pulled backwards & forwards from
one end of the screwed spindle to the other, after the manner of an Archimedean
drill, the screwed spindle and the armature are caused to rotate rapidly.
Or I sometimes arrange the armature so that it rotates on an axis through only
a small arc, the extent of the movement being preferably regulated by fixed limiting
stops or buffers, between which a projection F on the armature works backwards &
forwards, these limiting stops or the projection being faced with india rubber, leather
or other soft material, and in some cases the pole pieces PP of the magnet or
magnets themselves acting as the limiting stops and I impart the requisite motion to
the armature by means of a suitable arm or finger piece G which is fixed radially to the
armature A or to one extremity of its axis B in such a manner that it may conveniently
be taken between the finger and thumb and shaken rapidly to & fro thus causing
the armature to partially rotate through a small are reciprocally backwards and
forwards.
It is clear that in the above methods of carrying out my invention, instead of
keeping the magnet or magnets fixed and rotating or moving the armature, I may
keep the armature fixed and rotate or move the magnet or magnets by means of the
screwed spindle or radial finger piece as described.

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). In an electro-magnetic or magneto-electric generator the employment of a
rapid pitch screwed spindle engaging in a nut for rotating the armature or the
magnets in the manner described.
(2). In an electro-magnetic or magneto-electric generator the employment of a
magnet or magnets and an armature one of which is fixed while the other is
caused to partially rotate thro' a small are reciprocally, backwards or forwards.
(3). The combination with the subject matter of the last preceding claiming
clause of a radial finger piece or handle for giving a partial rotary reciprocating
motion to the armature or to the magnet or magnets, substantially as described.
(4). The combination with the subject matter of the two last claiming clauses of
limiting stops or buffers for controlling the extent of the movements of the armature
or magnets substantially as described.