or other Insulators to Bolts, Spikes, and the like.
Year: 1887

page_text: Date of Application, 25th Apr., 1887
Complete Left, 29th Dec., 1887
Complete Accepted, 10th Feb., 1888
or other Insulators to Bolts, Spikes, and the like.
I ALEXANDER JOHNSTON, Telegraph Inspector, Post Office Telegraphs, Imperial
Hotel, Dundee N.B., do hereby declaro the nature of this invention to be as
follows:
The insulator is of the ordinary pattern and is formed with a central cavity which
may be either parallel in bore or slightly tapering, the length of such cavity being
substantially the saine as at present employed.
I form upon the bolt spike or other support a sleeve or bush or liner of some soft
yielding material, preferably lead, which may either he cast on a portion of the surface
of the bolt, spike or other support, or may be formed in any convenient manner, the
surface of the support being notched grooved or otherwise prepared to receive it.
The end of the bolt, spike or other support so covered fits tightly into the cavity of
the insulator which may be driven on by a few light taps with a mallet and the end of
the said bolt so prepared may be either cylindrical or tapering as required by the
cavity in the insulator the whole arrangement being substantially as set forth in the
appended drawing.
DESCRIPTION OF THE DRAWING.
The Drawing shows a vertical section through the insulator, A is the insulator of
ordinary form having a central cavity here shewn tapering, B is the bolt shewn jagged
or notched at its upper end to receive the lead bush or sleeve, C the upper end fitting
tightly as shown in the drawing.
1 ייהנ..
" 1000

page_text: A New and Improved Method of Attaching Telegraphic, Telephonic,
or other Insulators to Bolts, Spikes, and the like.
I, ALEXANDER JOHNSTON, of 176 Regents Park Road in the County of Middlesex
formerly of Imperial Hotel, Dundee, N.B. Telegraph Engineer, Post Office Telegraphs,
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 insulator is of the ordinary pattern and is formed with a central cavity which
may be either parallel in bore or slightly tapering, the length of such cavity being
substantially the same us at present employed.
I form upon the bolt, spike or other support a sleeve, or bush, or liner of some soft
yielding material preferably lead, which may either be cast on a portion of the surface
of the bolt, spike or other support, or may be formed in any convenient manner, the
surface of the support being notched grooved or otherwise prepared to receive it.
The end of the bolt, spike or other support so covered fits tightly into the cavity of
the insulator, which may be driven on by a few light taps with a mallet, and the end
of the said bolt so prepared may be either cylindrical or tapering as required by the
cavity in the insulator, the whole arrangement being substantially as set forth in the
Drawing appended to my Provisional Specification.
DESCRIPTION OF THE DRAWING.
The drawing shews a vertical section thro the insulator. A is tho insulator of
ordinary form having a central cavity hero shown tapering. Bis the bolt shown jagged
or notched at its upper end to receive the lead bush or Sleeve C the upper end fitting
tightly as shown in the drawing.
Having now particularly described and ascertained the nature of my said Inven-