US573465A - Can-opener - Google Patents

Description

('NoModel.)

C.S.HOPPER. CAN OPENER.

No. 573,465. Patented De0.22, 1896.

UNITED STATES ATENT FFICE.

CHARLES S. HOPPER, OF PHILADELPHIA, PENNSYLVANIA.

CAN-OPENER.

SPECIFICATION forming part of Letters Patent No. 573,465, dated December 22, 1896.

Application filed omel- 7,1896. Serial No. 608,106. (No model.)

To all whom it may concern.-

Be it known that 1, CHARLES S. HOPPER, a citizen of the United States, residing at Philadelphia, (Germ antown,) in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Can-Openers, of which the following is a specification.

My invention has relation to a can-opener of the type or class wherein a disk provided with a central pin is also provided with a cutting-blade arranged radially with respect to the pin, and in such connection it relates particularly to the construction and arrangement of such a can-opener.

The principal objects of my invention are, first, to provide in a can-opener a disk having a central pin adapted to enter the face of the can, the disk being radially slotted for the reception of a cutting-blade which is adj ustable in the slot radially with respect to the central pin, and, second, to provide in a canopener a disk the periphery of which is scallopecl and having a radial slot and central pin and ablade adapted to be adjusted in the slot and to be secured to the disk by means of a thumb-nut.

My invention, stated in general terms, consists of a can-opener constructed and arranged in substantially the manner hereinafter described and claimed.

The nature and scope of my invention will be more fully understood from the following description, taken in connection with the accompanying drawings, forming part hereof, and in whicl1- Figure 1 is a perspective view of a canopener embodying main features of my invention. Fig. 2 is a top or plan view of the can-opener. Fig. 3 is a longitudinal section on the line 00 a: of Fig. 2, illustrating the canopener in operative position upon a can and Figs. 4 and 5 are respectively a side elevation and an enlarged underneath plan View of the adjustable blade.

Referring to the drawings, (t represents a disk of metal, wood, or other firm material and having its periphery scalloped or cut out, as at a. At the center of the disk is secured a pin b, projecting downward from the disk. In the disk is out or formed a radially-ar ranged slot or guideway 61, in which the stem V e of a cutting-blade f is adapted to be guided.

The steme is screw-threaded and projects through the slot above the top surface of the disk a, and is adapted to receive a thumb-nut g. The blade f has a point f, and is so ground that the surface f nearest the pin 1) is fiat, whereas the outer surface f is curved or beveled, as clearly shown in Fig. 5. The blade f is also provided with a shoulder f which rests on the under surface of the disk at when the thumb-nut g is advanced on. the stem 6, and through the clamping action of the shoulder f and the nut g the blade f is secured or fixed in its required position in the slot d of the disk.

In operation the blade f is first secured in the slot cl of the disk to in its required position, which will depend upon the size of the circular opening to be made in the can b, and also of course upon the diameter or size of the head 7t of the can. The disk is then pressed firmly into the head h of the can, the pin 1) and blade f penetrating the head h, as indicated in Fig. 3. The disk Ct is now turned by hand, the scalloped periphery a affording a firm hold upon the disk. As the blade f turns, the metal of the head it is sheared, and the peculiar form of the blade f permits the metal to be cut with a straight edge along the piece to be cut out and a downwardly-projecting curl or flange 7t on the part of the head 71/ remaining on the can.

Having thus described the nature and objects of my invention, what I claim as new, and desire to secure by Letters Patent, is-- The combination, in a can-opener, of a disk provided with a scalloped periphery adapted to afford a firm hold in the turning thereof and with a fixed pin or spur, and an oblong slot in the body thereof, a cutting-blade provided with a shouldered and threaded stem, said blade having a fiat surface on one side and a curved or beveled surface on the opposite side of the same and a thumb-nut adapted to be advanced on the threaded portion of the stem of said blade, substantially as shown and described.

In testimony whereof I have hereunto set my signature in the presence of two subscribing witnesses.

OIIAS. S. HOPPER.

IVitnesses:

J. WALTER DOUGLASS, THOMAS M. SMITH.

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