Design for a drill-bit
US D35447 S
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Description (OCR text may contain errors)
Patented'Doc. l7, I90l. F. H. GETGHELL & J. JACKSON.
I II 5 fflaezozzezz UNITED STATES PATENT OFFICE.
FRANK H. GETCHELL AND JAMES JACKSON, OF ALLOUEZ, MICHIGAN.
DESIGN FOR A DRILL-BIT.
SPECIFICATION forming part of Design No. 35,447, dated December 17, 1901. Application filed November 1901- $erial No. 81,755. Term of patent 1A years.
To all whom, it may concern:
Be it known that we, FRANK H. GETOHELL and JAMES JACKSON, citizens of the United States, residing at Allouez, in the county of Keweenaw and State of Michigan, have invented and produced a new and original Design for a Drill-Bit, of which the following is a specification.
The invention relates to a new and original design for a drill-bit; and it has for its object to provide a design of this character that will be both useful and attractive.
The leading feature of the design consists in the design forming the subject-matter of the accompanying illustrations.
In the drawings, Figure l is a perspective view of a drill-bit, showing our new and original design. Fig. 2 is a side elevation of the same. Fig. 3 is an end view.
Referring to the drawings, 1 designates the upper stem or shaft portion of the drill-bit, which is provided at its lower portion with upwardly-tapered longitudinal ribs 2 and 3, having concave outer side faces 4e and 5 and terminating at their lower ends in approximately triangular cutters 6 and 7. The approximately triangular cutters, which are located atdiametrically opposite points, have their lower cutting edges arranged in the same horizontal plane, and they are located at the sides and ends of a central cutter 8, which projects beyond the side cutters 6 and 7 and which depends from the center of the head of the bit. The central cutter is provided with an approximately triangular projecting portion which is located wholly beyond the side cutters 6 and 7, and it has flat side faces 9 and flat end faces 10. The side cutters 6, which are arranged at the ends of the central projecting cutter, are of less width than the cutters 7, which extend outward from the sides 9 of the central cutter. The outer end faces 11 and 12 of the side cutters are slightly curved, as illustrated in Fig. 3 of the accompanying drawings, and present outer convex faces, which are located the same distance from the center of the bit. The narrow side cutters 6 are located at diametrically opposite points, and the wide side cutters 7, which are arranged between the side cutters 6, are also located at diametrically opposite points.
What we claim is- The design fora drill-bit, herein shown and described.
In testimony that we claim the foregoing as our own we have hereto affixed our signatures in the presence of two witnesses.
FRANK H. GETCHELL. JAMES JACKSON.
FRANCIS WARD, A. E. PETERMANN.