Zinn Automatic Razor - The British Saga
Invention Improvement in Safety Razors
Filed Tuesday, 21st November 1905
Published Thursday, 19th July 1906
Inventor Walter J. Smart
Other countries US881033
The Zinns claimed this patent as their own invention, but we know from the US patent that Walter J. Smart was the inventor. Also interesting are the differences between the original and amended versions. Only the amended version is shown, with
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We, Mary Zinn of 54. West 96th Street, New York City; Martin Zinn of 121 St. Nicholas Avenue, New York City, and Arthur Simon Zinn of 218. West 139th Street, New York City, United States of America, Manufacturers; do hereby declare the nature of this invention and in what manner the same is to be performed to be particularly described and ascertained in and by the following statement.
This invention relates to safety razors of the kind
The invention will be described with reference to the accompanying drawings wherein
In the drawings the jaws or clamp sections are shown as provided with lugs or bent parts forming bearings for the pivots
The clamp or holder shown separately in
The position of the cutting edge of the blade when the latter is in place and the inclination of the guard-surface between the extreme edge of the guard and the edge of the blade, are such as to cause the proper action of the blade and the guard in the well known manner during the operation of shaving. The actual construction of the clamp may of course be varied.
The frame constructed as described forms a receptacle for the lather collected during the operation of shaving.
In place of a pair of clamp members or jaws, a single member or jaw can be employed as seen in
To enable the blade to be inserted from the front instead of the back, the comb
For the purpose of concealing and protecting the spring or springs
It will be noted that in all the constructions illustrated there is a blade which may be adjusted by sliding it in one direction or the other over the surface of the guard in a line extending between the front and rear of the latter, and the spring clamp bearing upon it across its entire length holding it in the adjusted position. The facility for doing this is of importance as it permits of the parts of the razor being readily assembled and it moreover enables the distance of the blade-edge relatively to the extreme edge of the guard (when, for instance it is desired to effect an ordinary, medium “close” or “close” shave) to be readily adjusted.
Furthermore the razor in all cases includes a clamping member which preferably has a length (measured in line with the cutting edge of the blade) which is substantially equal to the length of the blade, a feature of practical utility, since with the thin and narrow blades, such as the razor is designed to employ, it is practically necessary to support the blade throughout its length, failing which it would tend to spring away from the guard at such portions of the blade as are not backed by a clamping pressure, and thus interfere with the proper action of the blade.
It will be observed that there is a re-action member or abutment in cooperative relation with the clamping member, whether such reaction member or abutment be in the form of an opposing jaw, such as
Having now particularly described and ascertained the nature of the said invention and in what manner the same is to be performed, we declare that what we claim is.
1. In a safety razor the combination with the guard of a blade slidable to position over the surface of the guard in a line extending between the front and rear thereof, a movable clamping member consisting of a pair of jaws one of which jaws is adapted to contact with one face of the blade substantially throughout its entire length, the other jaw forming a reaction member or abutment with which the opposite face of the blade is adapted to contact, and means for maintaining the clamping member and blade in operative position, substantially as described.
2. A Safety razor comprising a guard, a blade, a clamping lever pivoted to turn about, an axis substantially parallel to the cutting edge of the assembled blade, a reaction member or abutment, and a spring for forcibly pressing the clamping lever against said blade and the latter thereby against said reaction member, substantially as described.
3. A safety razor wherein the frame or support is curved to form a receptacle for the lather and slotted at its free edge to constitute a guard, substantially as described.
4. In a safety razor such as claimed, a shield partially enclosing the spring, substantially as described.
Dated this 21st day of November 1905
A. M. & WM. CLARK,
Chartered Patent Agents.
53. Chancery Lane. London.