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Single Edge Razor

PatentUS903957

InventionSafety-Razor

FiledSaturday, 29th September 1906

PublishedTuesday, 17th November 1908

InventorLyman H. Cobb

OwnerMary Elizabeth Johnson

LanguageEnglish

CPC Classification:   
B26B21/16
  • B26B21/16
    Safety razors with one or more blades arranged transversely to the handle involving blades with only one cutting edge
  • B
    Performing Operations; Transporting
  • B26
    Hand Cutting Tools; Cutting; Severing
  • B26B
    Hand-Held Cutting Tools Not Otherwise Provided For
  • B26B21/00
    Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
  • B26B21/08
    Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor involving changeable blades
  • B26B21/14
    Safety razors with one or more blades arranged transversely to the handle

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A PDF version of the original patent can be found here.

United States Patent Office.

Lyman H. Cobb, of Fitchburg, Massachusetts, assignor to Mary Elizabeth Johnson, Trustee, of Fitchburg, Massachusetts. Safety-Razor.
No. 903,957. Specification of Letters Patent. Patented Nov. 17, 1908.
Application filed September 29, 1906. Serial No. 336,799

To all whom it may concern:

Be it known that I, Lyman H. Cobb, a citizen of the United States, residing in Fitchburg, in the county of Worcester and Commonwealth of Massachusetts, have invented a new and useful Improvement in Safety-Razors, of which the following is a specification, accompanied by drawings forming a part of the same, in which—

Figures 1 and 2 represent side and rear views respectively of the safety razor embodying my invention. Fig. 3 represents the under side of the razor head, the handle having been removed. Fig. 4 is a front view of the head of the razor, and Fig. 5 is a detached view of the clamping cam by which the clamping plates are drawn together, for holding the cutting blade in position, and Fig. 6 is a central sectional view of the head of the razor and one end of the handle.

Similar reference letters and figures refer to similar parts in the different views.

My present invention refers to that class of safety razors comprising a head for holding a cutting blade, and mounted on the end of a handle, said head consisting of a pair of clamping plates between which the cutting blade is held in position.

My present invention has for its object to provide an improved means whereby the cutting blade may be securely clamped into position or released at will by a single operation, and it consists of introducing into the head of the razor a clamping cam provided with a lever handle which, by a partial revolution, serves to crowd the clamping plates firmly against the cutting blade held between them.

Referring to the accompanying drawings, 1 denotes the handle and 2 the head of the safety razor embodying my invention. The head consists of a clamping plate 3 bent at right angles at 4 and 5 and returned upon itself forming a flange 6, and the plate 7 attached by a screw 8 to the end of the handle. Between the plates 3 and 7 is clamped 4 cutting blade 9. The blade 9 is inserted between the plates 3 and 7, and the plates are drawn together by means of a rotating cam 10 turning freely on the end of the handle, and inserted between the clamping plate 7 and the flange 6. The flange 6 is capable of a sliding movement on the handle, and is provided with a raised rib 11, forming a cam surface coöperating with a corresponding cam surface 12 on the under side of the cam 10. The cam 10 is provided with a lever handle 13, having a depending lug 14, which enables the cam to be rotated by the pressure of the thumb or finger against the lug. When the raised rib 14 on the flange 6 is brought to correspond with the recessed cam surface 12 on the cam 10 the cutting blade 9 will be released, and by turning the cam into position shown in Figs. 3 and 4 the opposing cam surface crowds the flange 6 downward and draws its connected clamping blade 3 firmly against the upper surface of the cutting blade 9. In its clamped position the lever 13 and lug 14 are pushed back against the rear side of the head entirely out of the way of the cutting edge of the blade 9, and not interfering with the free use of the-razor.

I claim,

1. In a safety razor, the combination with a handle and a clamping plate attached to the end of said handle, of a second clamping plate and a clamping cam arranged to lock said plates in contact with a razor blade between them.

2. In a safety razor, the combination with a handle and a clamping plate attached to one end of said handle, of a second movable clamping plate bent around one edge of said attached clamping plate, and having a flange parallel to said movable clamping plate, and a cam interposed between said flange and said attached clamping plate for drawing said clamping plates together.

3. In a safety razor, the combination of a handle, a clamping plate attached to the end of said handle, a movable clamping plate on one side of said attached clamping plate and having a flange integral therewith and extending across the opposite side of said attached clamping plate, a cam surface on said flange, and a cam rotatable about the handle and coöperating with said cam surface.

4. In a safety razor, the combination of a handle, a clamping plate attached to said handle, a movable parallel clamping plate, and a cam rotatable about the axis of the handle, whereby said clamping plates are drawn together.

5. In a safety razor, the combination of a handle, a clamping plate attached to said handle, a movable clamping plate parallel with one side of said attached clamping plate, a cam rotatable around said handle on the opposite side of said attached clamping plate, and a flange connected with said movable clamping plate and provided with a cam surface coöperating with said rotatable cam.

6. In a safety razor, the combination with a handle, a clamping plate attached to said handle, a movable clamping plate on one side of said attached clamping plate, a cam rotatable about said handle on the opposite side of said attached clamping plate, and operatively connected with said movable clamping plate.

Dated this nineteenth day of September 1906.

Lyman H. Cobb.

Witnesses:

C. A. Batchelder,

Blanche L. Smith.