US1974504A

US1974504A - Safety razor

Info

Publication number: US1974504A
Application number: US610934A
Authority: US
Inventors: Mohrenwitz Friedrich
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-09-08
Filing date: 1932-05-12
Publication date: 1934-09-25
Anticipated expiration: 1951-09-25

Description

w Sept. 25, 1934. F. MOHREIINWITZ 1,974,504

SAFETY' RAZOR Filed May 12, 1932 Patented Sept. 25, 1934 UNITED STATES SAFETY RAZOR Friedrich Mohrcnwitz, Frankfort-on-the-Main, Germany 4 Application May In Germany September 8, 1931 3 Claims. (01. 3012) The invention relates to a safety razor, the novel feature of which is that the apparatus is provided with a catch which when released automatically frees the blade and the cover plate of the apparatus from the handle.

The invention is applicable to razors with thick or thin blades.

According to the present invention, the razor is assembled or taken apart by the application of pressure to a thumb piece, and thus no time is lost in screwing together the various .parts; consequently there is no danger of the fingers being damaged, and as no parts have to be screwed together time is saved when the razor is cleaned, assembled or taken to pieces. According to a further feature of the invention, the spindle of the cover plate, which hitherto had, to be round to facilitate the screwing operations, may now be rectangular, hexagonal or star-shaped, or may have any other desired shape, the blade being held in position by means of a correspondingly shaped hole therein so that there is no possibility of the blade slipping.

Another feature'is that the blade can be differently adjusted on either side, so that the cover plate exposes the blade more openly on one side than on the other side.

It is well known that one adjustment is required for the preliminary shave during which he stronger growth of beard is removed, and another adjustment is necessary for the finish,- ing shave. One side of the razor can, therefore, beused for the preliminary shave, and the other side, where the cover plate is screwed home more tightly, can be used for the finishing shave.

The difference between the two sides is shown particularly clearly in Fig. 10 of the accompanying drawing.

The different adjustment on either side is obtained first of all by the cover plate being tilted only by the retaining pin, and thereby inclined until the end of the middle spindle rest-s against the inner wall of the tubular portion. Further, the desired adjustment is obtained in that the notched portion of the spindle of the cover plate is very slightly inclined.

Further theapparatusmay be provided with a device which also removesthe blade varying distances from the guard comb so that it can be adjusted to suit the growth of the beard in each particular case. This is achieved by fitting on the transverse pin which holds the cover plate or releases it when pressure is applied a retaining member with a revoluble nut. When this nut is turned towards one side, the blade and the cover 12, 1932, Serial No. 610,934

plate are raised automatically, so that the smallest difference in adjustment can be made.' When the nut is turned towards the other side the blade and the guard comb are drawn together so that all individual requirements of the shaver can be met. a

. In a corresponding form of construction the safety razor is provided with a longer middle spindle, and a small transverse pin projecting on both sides is fitted at the end of the said middle spindle. These-called retaining member which holds this long middle spindle has a transverse opening on two sides of the wall through which the small transverse pin (passed through the middle spindle) can be inserted, and when the handle is turned the spindle is held on the tube bythe inwardly projecting portions of the retain'-' ing member. The apparatus is taken to pieces simply by turning it in the opposite direction whereby the small transverse pin of the middle spindle slips out of the inwardly projecting portions which hold it, the long middle spindle is thus released and owing to the release of tension on the blade the blade and the'cover plate spring from the apparatus. The apparatus is assembled simply by pressure being applied to the cover plate and by'the retaining member being turned until the transverse pin again rests against the inwardly projecting portions. The apparatus is improved by a guide for this rotation being fitted on the retaining member namely so that at the bottom of the retaining member. a small guide pin is fitted, and in the enclosingtube a corre+ sponding guide channel is provided which pro: vides a guide for the retaining member during the necessary rotation.

Fig. l is a plan of the cover plate.

Fig. 2 is an elevation of a cross-section through the narrow side of the coverplate.

Fig. 3 is an elevation of the longitudinal side of the cover plate.

Fig. 4 is a side view of the apparatus with the spring catch, wherein a is 'the cover plate, I) the blade, and c the button'by which the spring: catch is released. This can of course falsobe fittedin the hollowhandle, at the' bottom,

' Fig. 5 is'a cross-section through the apparatus with the spring catch, wherein a is the cover. plate, b the razor blade, at the connecting spindle with the notches, which is held in neutral position by the retaining member e, and c the button which releases the blade and the cover plate from the handle portion. 1 denotes the spring provided for returning the button to the neutral position as soon as it is released.

The middle spindle of the cover plate can be held by a retaining member for example a hook (see Figs. 8l1) or by a catch-bolt (see Figs. 6 and '7).

Fig. 6 is a detail plan of the catch-bolt, wherein c is the release button, e the retaining member, g the opening therein by which the connecting spindle of the cover plate is held in neutral position. h denotes the larger opening into which the connecting spindle slips when pressure is applied to the button, and thereby releasing the cover plate and the blade.

Fig. 7 is an end elevation of the cover plate and I the retaining member e ,and the connecting spindle d which may be provided at the end with notches, spaced unsymmetrically on both sides relatively to the cover plate, and thereby also cause the cover plate to expose the blade to different extents on either side of the apparatus.

Fig. 8 is a cross-section through the apparatus wherein the retaining member does not pass round connecting spindle but only projects therein. 0. denotes the cover plate with the connecting spindle, b the blade, 0 the button, z the retaining member which is disengaged from the notches when pressure is applied to the button, and thereby the cover plate and the blade is released, thelatter being freed from tension springs together with the cover plate from the handle portion. 1" denotes the spring by which the button is returned to its neutral positionas soon as it is released. Fig. 9 is the cross-section through the retaining member (fitted on the retaining pin) with a revoluble nut, bywhich the blade can be adjustedxto the various degrees of exposure. 1' represents the retaining member which holds the cover plate or releases it whenpressure is applied to the button. a denotes, the cover plate, I) the blade, is thescrew member connected with the retaining. member. Z is the revoluble nut which is screwed into the said screw member. In the walls of the screw member suitable passages 'm. are provided through which the transverse pin of theretaining member passes so that when the screw member "is tightened up this transverse pin is drawn down andthus the blade is drawn more tightly against the guard comb n and thus the blade can be suitably adjusted.

' Fig. 10 is across-section through the retaining catch-bolt, cover plate and tube of the safety razor, wherein Z is the retaining member, 0 the long middle spindle of the. cover plate, a the cover plate, 10 the wall of the tubular portion, r the somewhat inclined notched middle spindle which in conjunction with the one-sided hold of the cover plate causes the spindle to assume an. oblique position until the end rests against the wall of the tube and thus permits the varying adjustment' of the blade on both sides.

Fig. 11 is an elevation partly in crosssection through the apparatus with the long middle spindle in neutral position. 3 is a cross section through-the small retaining, pin, t the inwardly projecting portion in the retaining member, and u the guideway in the tube of the apparatus. 1) is the-guide pm which moves in this guide chan nel.

Fig. 12 is an end elevation and partly a crosssection when the cover plate is released. 8 is the retaining pin in the released position when it can slip out of the retaining member without it being held by the inwardly projecting portions on both sides t of the retaining member. u shows the guide channel in the Wall of the tube, and v the small guide pin in the release position.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. Asafety and corn razor comprising a cover plate having a stern on its inner side provided with a groove, a tubular handle having a base plate, the stem of the cover plate extending into the tubular handle, a blade arranged between the cover and base plates, a release hook comprising an arm extending transversely through the handle, provided at one end with a pressure plate and with a spring arranged between the pressure plate and the handle and at the opposite end with a portion extending longitudinally on the outer side of the handle and terminating in a bill portion extending through an opening in the handle and detachably. engaged in the groove of the stem, a shaft arranged in the tubular handle and pivotally mounted on the transverse arm of the hook and a sleeve nut threadedly engaged with said shaft, arranged in the tubular handle and provided at its outer end with an enlarged bottom portion Which bears against the outer end of the tubular handle. I

2. A safety and corn razor comprising a cover plate having a stem on its inner side provided with a groove, a tubular handle having a base plate, thestem of the cover plate extending into the bore of the tubular handle, a blade'arranged between the cover and base plates, andsecuring means mounted in and movable transversely of the handle arranged to engage the groove of the stem of the cover plate, said stem being of less diameter than the boreof the tubular handle so that said securing means tilts the stem of the cover plate and hence correspondingly tilts the cover plateso that one side of the latter is spaced from the base plate.

3. A safety and corn razor comprising a cover plate having a stem on its inner side provided with a groove, a tubularhandle having a base plate,'-the stem of the cover plate extending into the tubular handle, a blade arranged between the cover and base plates, a release hook comprising an arm extending'transversely through the handle, provided at one end with a pressure plate and with a spring arranged between the pressure plate and the handle and at the opposite end with a portion extending longitudinally on the outer side of the handle and terminating in a bill portion extending through an opening in-the handle and detachably engaged in'the groove of the stem, a screw shaft in the bore of the handle and connected to the arm of the release hook, and an adjusting nut engaged with said screw shaft and bearing against the outer end of the handle.

FRIEDRICH MOI-IRENWITZ.