US1145343A - Can-opener. - Google Patents

Description

C. H. WORKMAN. 7

CAN OPENER.

APPLICATION -F|LED APR. 3, 1915.

1,145,343. Patented July 6, 1915.

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CAN-OPENER. 3

'Appfioation filed April 3, 1915. Serial No. 19,018. a

To all whom it ma z concern: j

Be it known that I, CHARLES H. WORK.- MAN, a citizen of the United States, residing in the city and county of San Francisco and State of California, have invented new and useful H Improvements in Can- Openers, of which the following is a specification. V

This invention relatesltoa can opener.

One of the objects of the present invention is to provide a simple, substantial, easily operated can opener which is provided with a rotary cutter, and which is also provided with means for supporting and gripping the can while the cutting operation is taking place. I

Further objects will hereinafter appear.

' The invention consists of the parts and the construction and combination of parts ,as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which'. j j

Figure 1 1s a plan view ofthecan opener. 1s a cross section of same onl ne 2,2,

Fig. i 1.

interlocking of the fixed and movable jaws. Fig. 4: is a detail section online'i-A of Fig.

1. Fig. 5 is a detail, verticalsection on line 5+5 of Fig. 2. j

Aindicates a cutting head-whichis adapted to be turned or; rotated by means of a handle 2. The handle is pivotally mounted,

as at 3, in lugs 4 formed .ontop of the head and is adapted to be tilted intothe full line .position shown in Fig. 2 and automatically returned to the normal position indicated by dotted ,lines in. said figure by a spring 5. The upward movement of thelever' is limit- .ed by a lug6, whi1e the downward or depressing movement is limited by a lug 7. so

--Slidably mounted in the head, in slots 8 formed between the arm supporting lugs, is

.a vertically positioned; cutt ng knife 9. The

upper end of this knife is provided with a slot 10 through which a projection on lug 5 extends. The lower end of the knife is suitably pointed or-shaped, as indicated at 11, to produce a cutting edge. Theknife is l j operated by means ofthe handle, or, in other words, raised. or lowered by. samein this manner be depressedto puncture the top of the can indicated-at 12. v

the movable jaw is swung intoclosedaposibeing turned by means of the handle2,pre-

Fig. 3 is a detail view" showing v through the connection provided by'the lug, and may mounted with relation thereto, as indicated 2 at 15. Formed integrally with the stationary jaw is a screw clamp, such as indicated at 16, by which the can opener as a whole a may be secured to the edge of a table or the like. Suitably secured on the lower end of the clamp is a platform 17 upon Which the can to be opened is supported.

Fivotally mounted in the outer end of the movable jaw is a lever 18, on the inner end of which is formed a hook or catch 19 which is adapted'to be swung into engagement with a lug 20 formed on the stationary :j aw. The cutting head is adapted to be rotated when tion and when the lockinglever is thrown 1nt o position where its inner hookedlend engages. with the cooperating lug; the head viously described.

line position indicated ill Fig. 1. The can to be opened is then placed on the support- In op eration, when it is desired to. opena can, 1t is only necessary to release the moving platform and moved ,into. position below i the rotary cutting head: The movablejaw cure the rotary cutting head in position but also clamps the can against movement; the

stationary and movable. jaws being sufficiently deep to embrace the upper part, of the can. Handle 2 is then depressed, as

.shown' in Fig. 2, causing the. knife to enter the. can. Itis thenrotated one revolution,

causing the lmife'to form, a circulancut which severs the head ,from thecan. The

handle is then released and isautomatically in Fig. .2 by means of the spring '5; the same shown in Fig. 1 and the can removed.

The upper face ofeach jaw is provided with a semi-circular groove 21 into which a pin 22, secured in the cutting head, is adaptplete circle when the jaws are closed. 1 The pin in this instance merely serves as a'means {is then swung back and locked, as previously described. Thisoperation does not only seto retain the cutting head in the fixed'jaw while the movable jaw is thrown into the open position. The jaws are also provided returnedtothe dotted linev position shown ed to register. .Saidgrooves form acom- .1

with a second groove, such as indicated at 26, and the cutting head proper is provided with an outwardly extending flange which fits said groove. The head is thus completely locked from removal while the jaws are closed but is free to rotate.

Formed at each end of the stationary aw is an outwardly projecting shoulder 23, and formed at each end of the swinging jaw is a recess 24. These recesses register with the shoulders 23 when the jaws are closed and this forms a means for supporting the movable jaw while the head is being rotated. This is of considerable importance, as the whole strain would otherwise have to be supported by the pivot about which the movable jaw swings.

The cutting knife provided in the present instance is also of considerable importance, as'it has two cutting edges, thus permitting the head to be revolved in either direction. The center portion of the knife, furthermore, has a tendency to turn in the cut edge against the side of the can, thus smoothing it off and destroying the cut edge which is generally left on the can by ordinary can openers.

The materials and finish of the several parts of the device may be such as the experience and judgment of the manufacturer may dictate.

I wish it understood that various changes in form, proportions and minor details of construction may be resorted. to within the scope of the appended claims, and that I do not wish to limit myself to the specific design and construction here shown.

Having thus described my invention, what I claim and desire to secure by Letters Patent is- 1. A can opener comprising, in combination, a rotary head, means for supporting a can below said head, a vertically positioned knife reciprocally mounted in the head, means for depressing said knife so that it will enter the can head, and means for rotating the head.

2. A can opener comprising, in combination,a rotary head, a pair of jaws in which said head is mounted, one of said jaws being pivotally mounted with relation to the other, means for locking said jaws to inclose and grip the can to be opened, a knife mounted inv the head, means for depressing said knife to enter the can top, and means for rotating h ea 3. A can opener comprising, in combination, av rotary head, a pair of jaws in which said head is mounted, one of said jaws being pivotally mounted with relation to the other, means for locking said jaws to inclose and grip the can to be opened, a, knife mounted in the head, means. for depressing said knife to enter the can top, means for rotating the head, and means for automatically raising the knife out of engagement with the can.

a. A can opener comprising, in combination, a rotary head, a pair of jaws in which said head is mounted, one of said jaws being pivotally mounted with relation to the other, means for locking said aws to inclose and grip the can to be opened, an arm pivotallv mounted on the head, said head having a vertically positioned slot formed therein, a knife slidably mounted in said slot, means for depressing the arm, and a connection formed between the arm and knife to depress the knife in unison with the arm.

5. A can opener comprising, in combination, a rotary head, a pair of jaws in which said head is mounted, one of; said jaws being pivotally mounted with relation to the other, means for locking said jaws to inclose and grip the can to be opened, an arm pivotally mounted on the head, said head having a vertically positioned slot formed therein, a knife slidably mounted in said slot, means for depressing the arm, a connection formed between the arm and knife to depress the knife in unison with the arm, and means for automatically raising the arm and knife.

6. A can opener comprising, in combination, a rotary head, a pair of jaws in which said head is mounted, one of said jaws being pivotally mounted with relation to the other, means for locking said jaws to inclose and grip the can to' be opened, an arm pivotally mounted on, the head, said head having a vertically positioned slot formed therein, a knife slidably mounted in said slot, means for depressing the arm, a connection formed between the arm and knife to depress the knife in unison with the arm, and means for automatically raising the arm and knife, said means comprising a spring interposed between the arm and head.

7. A can opener comprising, in combination, a rotary head, a pair of jaws in which said head is mounted, one of said jaws being pivotally mounted with relation to the other, means. for locking said jaws to inclose and grip the can to be opened, an arm pivotally mounted on the head, said head having a vertically positioned slot formed, therein, a knife slidably mounted in said slot, means for depressing the arm, a connection formed between the arm and knife to depress the knife in unison with the arm,'a spring interposed between the arm and headto automatically raise the arm and knife, and means. for limiting the pivotal movement of the arm in either direction.

8. A, can opener comprising, in combination, a rotary head, a. pair of jaws in which said head is mounted, one of said jaws being pivotally mounted with relation to the other, a locking lever pivotally mounted with relation to the other, a locking lever 1 pivotally mounted on the movable jaw having a hook-shaped member formed on its inner end, a lug on the stationary jaw with which the hook-shaped member is adapted to interlock, said jaws being adapted to inclose the head and grip the can to be opened, an arm pivotally mounted on the head, said head having a vertically positioned 'slot formed therein, a knife slidably mounted in said slot, means for depressing the arm a connection formed between the arm and knife to depress the knife in unison with the arms, a spring'interposed between'the arm I v and head to automatically raise the arm and j knife, and means for limiting the pivotal 15 movement of the arm in either direction.

In testimony'whereof I have here-unto set I CHAS. P, HUNT, CHAs. A. OAVANAUGH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 1

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