Attachment clip for metal shingles

Claim 1

AN ATTACHMENT CLIP FOR ASSEMBLING A METAL SHINGLE TO A PAIR OF SPACED-APART, PARALLEL PURLINS WHICH ARE MOUNTED HORIZONTALLY ON INCLINED ROOF RAFTERS, SAID SHINGLES BEING FORMED OF SHEET METAL TO SIMULATE WOODEN SHINGLES OR SHAKES AND BEING ASSEMBLED ON SAID PURLINS WITH THEIR LOWER EDGES OVERLYING THE UPPER EDGES OF THE NEXT LOWER SHINGLES, EACH OF SAID SHINGLES HAVING ITS LOWER EDGE BENT DOWNWARDLY AND THEN REARWARDLY TO FORM A NARROW FLANGE, THE UPPER EDGE OF SAID SHINGLE BEING BENT OVER TO FORM A FORWARDLY AND UPWARDLY INCLINED LIP, EACH OF SAID PURLINS BEING FORMED WITH PARALLEL UPPER AND LOWER FLANGES CONNECTED ALONG ONE EDGE BY A VERTICAL WEB, SAID NARROW FLANGE AT THE LOWER EDGE OF SAID SHINGLE RESTING ON THE UPPER EDGE OF THE NEXT LOWER SHINGLE DIRECTLY OVER SAID UPPER FLANGE OF THE LOWER PURLIN, AND THE UPPER EDGE OF SAID SHINGLE RESTING ON SAID UPPER FLANGE OF THE UPPER PURLIN, SAID ATTACHMENT CLIP COMPRISING: AN ELONGATED BODY OF A LENGTH TO SPAN THE DISTANCE BETWEEN SAID UPPER AND LOWER PURLINS; MEANS AT THE UPPER END OF SAID BODY OVERLYING SAID UPPER FLANGE OF SAID UPPER PURLIN AND INTERLOCKING THEREWITH; AND MEANS AT THE LOWER END OF SAID BODY INTERLOCKING WITH SAID LOWER PURLIN AND HOOKING OVER SAID FORWARDLY AND UPWARDLY INCLINED LIP AT THE UPPER EDGE OF THE NEXT LOWER SHINGLE, TO SECURE THE LOWER EDGE OF THE ONE SHINGLE AND THE UPPER EDGE OF SAID NEXT LOWER SHINGLE TO SAID LOWER PURLIN, THE UPPER EDGE OF SAID SHINGLE BEING SECURED TO SAID UPPER PURLIN BY THE ATTACHMENT CLIP OF THE NEXT HIGHER SHINGLE.