US1006391A

US1006391A - Safety-razor.

Info

Publication number: US1006391A
Application number: US59967710A
Authority: US
Inventors: Edwin P Mccollom
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-12-28
Filing date: 1910-12-28
Publication date: 1911-10-17
Anticipated expiration: 1928-10-17

Description

E. P. MoGOLLOM.

SAFETY RAZOR.

APPLIUATION FILED D110. 20, 1910.

1 ,006,391 Patented Oct. 17, 1911.

WITNESSES;

INVENTOI? livmwP/ l ''auan ITTDRNEYS of nuts applied t in plate rigidly in the require 1 hese and other features embodied in my invention are hereinafter described, and 85.

in which- IMfES PATENT OFFICE.

EDWIN 1. MQCOLLOM, 0F ALLEGHENY, PENNSYLVANIA.

" SAFETY-RAZOR.

A Specification of Letters Patent.

Patented Oct. 17, 1911.

Applicationfle'd December 28, 1910. Serial Ho. 599,677.

To all whom it may eon-cam:

Be it known that I, EDWIN of Allegheny, in the county of Allegheny and State of Pennsylvania, have invented certain Improvements in Safety-Razors, of which the following is a specification.

My invention is an improvement .in that type of safety razors in which a reversible blade is secured detachably upon the toothed head or such sub-type as includes a spring handle having the extremities so constructed that theyare adapted to enter notches or open slots in the blade, and thus serve as a means for securing the latter. 4

If: my invention the handle is provided wit or terminals that'enter dove-tailed slots in the clamping plate .between which and the toothed guard the blades are secured. This engagement is made fast or secure by means the spring arms. The blades are rigid. and preferably doubleedged, so that they for edgewhen' required. In order that the blade-clamping plate may have due strength and rigidity, it is provided on the under side with a lengthwise rib whichenters a corresponding groove in the toothed head or guard, thus aiding in holdin the clampposition.

illustrated in th accompanying drawing,

v Figure IS a 'PBISPBCtlVB VleW Of my III- .venti'on. Fig. 2 1s a top or plan view of the ,head' portion of the same. Fi spective view of the toothed head or g. 3vis a perguard. Fig. 4 is a plan view of the guard with the bladesin due is a plan view 0, the under side of the blade-clamping plate. Fig. 6'is a plan view of one of the blades. Fig. 7 is a transverse section on. the line 77 of an end or edge view of the top portion of the implement. Fi 9 is a perspective view of the dove-tailed head or terminal of one of the spring arms. I 1 Th handle 1 is formed 'of spring wire,

the shank being composed of parallel rtions whose inner ends diverge and are nt at a right angle, thus forming a'fork having spring arms I, handle causing the arms to tend to approxi? guard, and more particularly in spring arms having wedge-shaped tipsmaybe reversed edge osition thereon. Fig. 5"

Fig. 2. Fig. 8 is the tension of the spring mate each .other, or, I in other words, i to P. MoCoLLoM, a citizen of the United States, and a resident spring inward. The terminal portions of the angular arms. 1? .are screw-threaded and provided with heads 1"see Fig. 9which are rectangular in cross section but 'dovetailed or wedge-shaped in the direction of their length, the larger or thicker portion of the dove-tail being outermost.

Cylindrical nuts 5 are applied to the threaded portionsof the arms 1 and the function of 'the same will scribed. The head or guard vided on opposite sides 'with in the usual way is provided with central notches 6 at the ends to receive the threaded terminals of the arms 1-see Fig. 3.

be presently de-' 2 which is proa series of teeth A- groove 7 extendscentrally and length- 7 upon a. flat inclined 'side portion or surface 0 the guard 2 and is held in place primarily by means of pins 10 and slotted lugs 11 which are formed as outward projections on the guar see especially Fig. 3. The pins O pass through hole% formed in the center of the blades 4 and he lugs 11 which are triangular in cross section enter V-shaped. notches 12 formedgin the ends of the bladess'ee especially 6. The In 11 also enter angularnotches 13 formed in the ends of theclamping" late3 at points .neartheir, side edges-see igs. 1 and.2.

It will now be understoodthat in assem bling the parts of my improved safety razor,-

the blades 4 are first placed. upon the. guard 2 in'the position indicated in Figs. 4, 7, and 8,. and that'the clamping. late '3 is then laid thereon, its end's being the lugs 11 of the guard. The arms of the spring'fork are then spread a art,'as indicated' by arrows in Fig. 1 an in Fig. 2, andcwhen released.- the wedge heads 1' enter the dove-tailed notches 9 formed in the ends of the screw threaded 'portionso said arms enter the ,end notches 6 of the ard. The nuts 5 are" then screwed up tightly against the 'ulyengaged with dotted lines 'late 3, while the'] under side of the guard, as shown in l 1 and 7 whereby the guard and clamp 3 are drawn and held firmly together, with a corresponding pressure on the blades 4 so that they are held perfectly rigid in place. The guard is recessed to receivethe upper ends of nuts 5, whereby the spring arms 1 are prevented from expanding laterally until the nuts have been screwed down thereon; thus, when the nuts are screwed up, the knives are clamped securely while the arms areheld' locked with the guard and the clampfplate. I thus form a most secure means for holding and clamping the blades and at the same time provide for conveniently detaching one or both when it is required to reverse them, or for other purpose. e

As before indicated, the blades are preferably made sufliciently thick to be practically rigld, since, as is well known, a rigid blade cuts better and preserves its edge for a longer time than a flexible one. The blades being also double-edged, they may be reversed, which extends the time for which the razor is available in use. Owing to. the narrowness of the blades, two may be made from about the same quantity of material as required for ordinary single-edged blades, which lessens the cost of manufacture and consequently the cost to the purchaser.

I deem the provision of the central longitudinal rib of the clam ing plate and the corresponding groove 0 the guard as of special importance, sinceitjnot only aids in assembling the parts, but imparts rigidity .to the whole when clamped together.

By constructing the spring arms 1 in right-angular form as shown, a clear s ace is left adjacent to the toothed edges 0 the guard, which facilitates use of the implement.

It will be understood that while I have shown the pins 10 as formed integrally with guard provide the guard, they might be made integral with the clamping plate instead.

What I claim is 1. The improved safety razor, comprising a forked spring handle having the terminals of its arms screw-threaded and wedgeshaped, nuts a plied to said arms, a toothed d with end notches adapted to receive said arms, and a blade-clamping plate applied to the guard and having wedge-shaped notches adapted to receive the extremities of, the arms, substantially as described.

' 2 In a safety razor of the type indicated,

the combination with a toothed guard and a clampin plate applied thereon and provided wlth dove-tailed notches in its ends, of a spring handle constructed as a spring fork whose terminals are constructed in wedge-form, and thus adapted to enter the notches of the plate, and means for drawing the plate and guard together, substantially as described.

3. In a safety -razor of the type indicated, the combination with'a forked handle and a toothed guard having slotted lugs arran ed at its ends and projecting inward, o a blade-clamping plate provided with notches opening outward .and adapted to receive said lugs, and clamping means applied to the terminals of the handle beneath the guard, and serving to secure the latter and the blade together, as described.

4. In a safety razor of the type indicated, the combination with a toothed guard having a 'central longitudinal groove, of a blade-clamping plate having a corresponding central longitudinal rib on its under E. L. Gimme, A. ADAMS.