US940396A

US940396A - Can-opener.

Info

Publication number: US940396A
Application number: US49870509A
Authority: US
Inventors: Adolph C Lemm
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-05-27
Filing date: 1909-05-27
Publication date: 1909-11-16
Anticipated expiration: 1926-11-16

Description

Imi) STATES 12min-NT OFFICE.

ADOLPH C. LEVM. 0F FREMONT. 'HTO CAILOPENER.

To all Awhom. 'it may cfmcern:

Specification of Letters Patent.

Application led May 27. 1909.

atemm .wmm. um.

Serial No. 498.705.

fmlnml. tlmi tlwv knif(x portion L is spi-ing lwlll against sniil ingvx. lt lwingV nun' nnv (lvrxinml llml in tlw npm'utim of my ilcvivv .will lingll' is mmlv (n fullo -uiil 'nnnli-r- ,nn-i. it is nmnifwt that :is .will linym' l'ul Inns said vonntvrpnrl. ils inni-x' m' lixvfl vwl. fullnwing tlw lvml uf llll tlll'vml. llmnm's mitm' vflgv of llnwww rim.

slum-n in tlw drawings. Fig. l. tlm puin( nl' mill kuil'.`

ing .fingvr l :it one emi, uml n knii'v pnrliun 2 :it llrrother: :nul wlmll xs suitably inl-nml.

Fuif! pra-tival (u ill-wrt. (lnpuinl nl llw ning: lmmll': 1. :unl tu hun n mln nlwmrlvv mnml llml llw Mnl lill its being forced out from under the edge of screw thread thereon; a knife portion, northe cover rim, by the tendency of said linger mally spring held' against said finger, but

to slip said thread; and second, it prevents cutting of the gasket when removing the cover. Incidentally said curvature serves to restore the rim to its original form, where by accident or otherwise it may have been bent out of shape; and this is accomplished in a measure, coincidently with the removal of said cover; but more ful y and completely by a suitable holding of said cover, While my device is apilied in the usual manner required for-tlm removal of said cover and made to rotate about Said rim. It has. been stated that as the lixed end of said finger is made to risc, a certain amount of friction is i produced, sutlicient so that. usually with a fraction of a turn, the cover is made 'to start;

but notwithstanding this, in practice it is A, found thatthe admission of air to the sealed jar renders the opening thereof, or the removal of its cover, less ditlicult; and the insertion and rotation of the knife separating the gasket from the cover, work to that end. lvhile other v material may ultimately be found equally desirable, at present I prefer,

und lrecommend, the use of a suitably tempered wire 'of spring steel, from which to construct my device.

lVhile I have shown and described my dcvice 1n its preferred form as constructed ot 'a single piece of Wire, the knife and finger port ion both integral therewith.

heini nevertheless, it may e uncerstood that said i spring held against eaid when said device is operated, made to travel under the edge of said cover while the plane of travel of said finger increases in distance therefrom; and a handle portion for the opratien of said device; substantially as described.

2. A device of the character described, comprising; a :spring intluenced finger; adapted to embrace a cylindrical cap or cover. and to follow the lead of a screw thread thereon; a knife ortion, normally nger, and means for causing the saine to travel under the edge of said cover while the plane of travel of said finger increases in distance therefrom; together with spring operating means forholding said knife. against said finger,

vice and a knife carried thereby, for inser- Piron. between the lower ed fe or' said cover knife may be made separately and secured i to the end of said rod by suitable incansas shown in Fig. 4, without departing from .the spirit of my invention; but. manifestly with more labor and less convenience, hence l broadly claim means.

.llavin now fully described my invention what I c aim asnew is:

l. A device of the character described made with all its several parts integral, and comprising; a spring influence/l finger, adapted` to emb-ace a cylindrical cap or cover, and made to follow the lead of a l :he usuaj gasket; said nifc being norlj: spring held against said finger, but. 1,. inked totravel under said edge with the. tien oi id device; and means integral 1vwith 'tor causing the saine to travel unid edge while said device is bein opcreer-d and the plane of travel of said Inger increases in distance therefrom; all in combination together with spring operatin means for holding said knife against -said finger. substantially as described.

In testimony whereof I atx my signature in presence of two witnesses.

ADOLPH C, ,LEMLL Witnesses FRANK J. TUrrLE, War. A. KovJALK.