AN IMPROVED METHOD OF SECURING SLATES TO ROOFS and
Year: 1885

page_text: I, GEORGE MARTIN of 8 Douglass Street Boston, in the County of Suffolk, and
State of Massachusetts in the United States of America, Slater, do hereby declare
the nature of my invention for "AN IMPROVED METHOD OF SECURING SLATES TO
ROOFS and in what manner, the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
"
My invention relates to a novel method of securing slates to iron roofs, and
consists in a fastening device composed of spring metal, one end of which is
provided with an eye or loop through which the bent end of the nail which passes
through the slate is caught and held, while the opposite end is sprung over the
edge of the purlin, as will be hereinafter more fully set forth and specifically
claimed.
Figure 1 is a perspective view of a portion of a roof with my invention applied
thereto.
Figure 2 is a view of the fastening device applied to a purlin, the purlin being
shown in dotted lines.
In the drawings A represents the purlins, angle or T-irons upon which the
slates B rest, these slates being provided with countersunk holes through which
passes the nails a, these nails being each provided with heads countersunk flush
with the upper surface of the slates, the lower ends of these nails being turned up
forming a loop which is caught into the eye b of a fastening or locking device C
of spring metal of the form shown in Fig. 2-This fastening device C is shaped
and operates in the following manner Passing from the eye b it runs in a
horizontal plane with the purlin for a short distance where it is bent down at c
and then bent at d and runs transversely across the under side of the purlin
against which it bears, from thence it passes upwards and bent again horizontally
with the purlin to a point e where it is bent in the form of a loop f the lower
portion of this loop resting upon the upper portion g of the purlin, from thence it
passes in a horizontal plane or nearly so with the edge of the purlin to the point h
where it is bent inward at i and rests upon the portion g of the purlin-When it
is desired to attach a slate to a roof, the looped nail is first passed through the hole
made for it in the slate, the spring fastening device C is then held in the band
with the loop portion fuppermost, it is then passed around the under surface of
the purlin, the space between the eye b and the loop portion f affording ample room

page_text: for this purpose, it is then turned in a plane parallel with the purlin and the
turned or looped portion of the nail caught into the eye b when the end i can
then be sprung over the portion g of the purlin and thus securely hold the slate in
place with a spring pressure. By making the fastening device of spring metal it is
evident that the slates will not be broken or cracked as has heretofore been the
case with a rigid fastening owing to the expansion and contraction of the iron of
which the roof is composed; my device will allow of a spring pressure to be at all
times exerted upon the slates no matter how much the iron of which it is composed
expands or contracts, thus obviating the necessity of frequent repairs and rendering
the slates more durable.
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
The herein described method of securing slates to roofs, the same consisting of a
spring fastening device, one end of which is adapted to catch over the purlin, while
its opposite end is provided with an eye which holds the upturned end of the nail
which passes through the slate, all combined and operating substantially as set
forth.
T
T י
1007