US 2225581 A
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v HAIR CUTTING MAGHINE Filed Nov. 1:5, 1934 2 Sheets-sheet 1 Y e I l itiiiiiiiiiii n 'am l j l l I A Tra-5 Dec. 17, 1940. E, Q BERG A 2,225,581
` .HAIR CUTTING MACHINE y 1 Filed New?. 13,1934 sheets-sheet INVENTOR. .EM/1. 6'. 51E/fa Patented Dec. l17, 1940 PATENT oFF-ICE HAIR. CUTTING MACHINE Emil G. Berg, Erie, Pa., assigner of one-twentieth to Edmund J. Te Pas, Cleveland, Ohio; Coletta A. Te Pas administratrix oi' said Edmund J. Te
Pas, deceased Application November 13, 1934, Serial No. 752,857
This invention relates to hair cutting machines and it has for one of its objects the provision of a hair cutting machine having two oppositelyV disposed cutting heads, one of which ls adapted 6 to clip off the hair at a slight distance from the skin as is done with an ordinary clipper, and the other of which is adapted to clip the hair very closely to the skin as is done with an ordinary razor. Another object of the invention relates to the provision of a small, compact hair cutting machine which may be held in the handl and manipulated in much the same manner as an ordinary safety razor; the device having provisions to perl5 mit its use with its cutting edge or handleheld at different angles with respect to the surface being operated upon.
Another object of the invention relates to the provision of a shaving machine of the type shown n which greatly reduces the number of strokes l which must be made to cut all of the hair on a given area.
Another object of the invention relates to the lprovision .of a vhair cutting machine having a 2B slotted guard plate in which the slots extend diagonally across the guard plate, and are wider at their ends than at their central portions. c Another object of the invention relates to the provision of a hair cutting machine having oppo- 80 sitely disposed cutting heads formed in part by a single motor operated cutting member.
Another object of this invention is to provide an improved means for facilitating the cleaning of the slots of a hair cutting machine of the type shown.
Another object of the invention relates to the provision of lubricating means for certain of the operating parts of a hair cutting machine.
Another object of the invention relates to the n provision of a hair cutting-machine employing a cutter and a guard member and having means for readily separating said members forcleaning and other purposes. y
Another object of the invention relates to the provision of a hair cutting machine having a handle, one part of which forms the supporting' structure for the operating parts of the machine,
the otherparts of the handle being held to the first part by concealed means so that no screws 50 or other fastening means are exposed to vie when the device is assembled.
Another object of the invention relates to the provision of a hair cutting machine, having oppositely disposed cutter heads with a singlecutter 5| operable therein and means for readily adjusting the clearance between the guard of the cutter head and the cutter within very close limits.
Another object of the invention relates to the provision of a hair cutting machine having a slotted guard and slotted -cutter cooperating therewith, the latter being arranged and operated so that some of the guard slots are open at all times for the unimpeded admission of hair to the slots.
A further object of the invention relates to the provision of an improved hair cutting machine which is of simple and inexpensive construction, which may be successfully operated without diiliculty or preliminary training by the ordinary person, which does not become overheated during its operation and which operates with a minimum of friction so that a very small motor may be successfully used to operate the machine.
With these and other objects in View, the invention consists in the novel construction, arrangementl and combination .of parts, hereinafter illustrated and described in some of its embodiments in the accompanying drawings, and particularly pointed out in the appended claims.
In the drawings, Figure 1 is a front elevational view of one side of the improved hair cutting machine to which this invention relates; Figure 2 is a view similar to Figure l, with4 the parts rotated 90; Figure 3 is a front elevational view of the opposite side of the machine shown in Figure 1; Figure 4' is an enlarged detail view corresponding to Figure 2, with certain of the parts broken away for sake of clearness; 'Figure 5 is an enlarged detail central sectional view taken on line 5-5,Flgure 1; Figure 6 is anenlarged detail sectional view taken on line 6 6, Figure 2; Figure 7 is a detail sectional view taken on line l-l, Figure 6.; Figure 8 is a greatly enlarged detail side elevational View of the guard and cutter of the machine; Figure 9 is a sectional view taken on line 9 9, Figure 8;. Figure 10 is a plan view of the guard and cutter shown in Figure 8; and Figure 11 is an enlarged detail view showing the bushing and camslot of the cutter.
In the form of the invention illustrated in the drawings, the hair cutting machine comprises a hollow casing or handle formed from mating1` sections I and 2. At the end of the handle there is carried a pair of heads 3 and 4, the former of which is provided for shaving and the latter for the clippingot hair. 'I'he shaving and clipping heads and handle forma Y-shaped arrangement, as is best shown in Figure 2 of the drawings. and by disposing the heads in the manner shown, the device may be manipulated in much the same atv manner as an ordinary safety razor, and its successful use does not necessitate the holding of the member with the result that the shaving head cuts oiI the hair much closer tothe skin than f does the clipping head.
The guard member of the device is formed from two bent-over parts, 6 and 6, corresponding ends of which are hinged at 'l to each other. The opposite ends of the guard members are formed with corresponding downturned portions 8 and I0. The parts 8 are iixedly secured to the handle part I by any suitable means such as the screws or studs II.- A relatively stiff spring I2 is interposed between the downturned portions 8 and lli of the guard members and a nut 8 carried by each of the studs II is provided for eiecting the adjustment of the slotted portions of the guard member with respect to a pair of slotted cutters I3 and I4 of integral construction.
The cutters are formed from a piece of sheet metal which is formed to the shape shown in the drawings. The ends of the piece are disposed alongside of each other and they may be welded or otherwise secured to the rest of the cutter, and a re-inforcing plate I5 may be welded to -such part to further increase its rigidity. The central part of the cutters is apertured for reception of a bushing I6 which is rigid with the cutter. The bushing I6 is slotted at- I1 for reception of an eccentric pin I8 provided on one end of a stud shaft 20, the other end of which is provided with a non-circular or prismatic bore 2| for slidably receiving a similarly shaped end 22 of the shaft 23 of a motor (not shown). The welding of the cutter may be dispensed with by securing the bushing I8, the re-inforcing plate I5 and the cutter parts to eachother by any other suitable means such asthe rivets I9.
The motor shaft 23 is annularly grooved at 24 for detachable engagement with a spring catch- 25 carried by the end of the, stud shaft 20 and provided for the purpose of holding the eccentric pin I8 in its operative position in the bushing I8. A manually operative wheel 28 carried by the stud shaft 28, is provided for the starting of the motorof the device. 'I'he wheel 26 is secured to its shaft by any suitable means such as the set screw 21, The stud shaft 20 is mounted in a bearing or bushing 28, about which the handle part I may be formed during the cast- 4 ing thereof, or the bushing 28 may be inserted in a suitable opening provided therefor, subsequently to the formation of the handle part l. f The handle parts I and 2 are preferablymade from one of. the'aldehyde condensation products, which products maybe readily molded in a variety of shapes without great difculty. A pair of similarly formed spring clips 29, 29 secured to the handle part I by means of screws 30, 30 engage with notches 3l formed in the handle part 2 and thus provide' means for holding the handle parts I and 2 detachably secured to each other, This form of securement dispenses with the use of exposed securement devices, thus en'- hancing'the appearance of the device. Exposed l, 3, 8 and 10.
.33, 33 which also serve as hinge pins for the hinge 1 of the guard members 5 and 6. The ends of these pins engage with suitable notches formed in the sides of the cover member 32, and areheld thereagainst by means of a U-shaped spring 34 which presses against the ends of the pins 33. The cover part 82 is hollowed-out for reception of which has portions 86 and 31 respectively, extending between the inner ends of the pins 33 in contact with the eccentric pin I8 and the bearing member I8 and between the guard and cutter member to the contacting parts thereof, thus serving as a means for effectively lubricating the pin I8, the stud shaft 20 and its bearing and also the contacting parts of the cutters and their guards.
In assembling the cutter head'the nuts il` are adjustedso as to provide a free yet very close particularly objectionable as it may become so great as to prevent the use of the device after it has been running a short time, either by reason of the load imposed on the motor or by reason of the fact that the hot guard members cannot be held against the` skin of the user without great discomfort.
I The cutting" edges of the shaving and clipping heads are formed in part by the edges at the underside of the bars 38 and 40 defining the slots a fibrous oil retaining material 35.
4I and 42 of the guards of the shaving and clipl ping heads respectively, asbest shown in Figures The slots 4I and 42 of the guard members are widened at their respective ends 43 and 44 to facilitate the entry of the hairs into the slots. Becauseof the construction just mentioned, in the normal use of the device, as it is moved back and forth over the skin in a direction substantially parallel with the slots of the outer guard member .and as the cutter head is moved in one direction or the other, the hairs are fed into the slots at the lower or leading, relatively wide portions thereof and upon further movement of the cutter head in the same direction, the hairs tlndtheir way to the upper or oi' the slots are slightly-wider at the top than at the bottom and this alsoA facilitates the entry of hair into the slots. The outer faces of the portions of the bars 38 and 40 defining the widened portions of the slots are made :dat so as to stretch the skin before it comes in contact with the curved cutting portion oi' the cutter heads.
Referring to Figures 8, 9 and 10 which show in detail'the guard and cutter of the device, it will be seen that the thickness of the guard member is reduced as its center point is approached,y and the space or mid-section between the intermediate portions 46 and 41 of the crossbars 44 constitutes the effective cutting area of Y the shaving head. 'I'he corresponding portion of the clipping head while of similar shape is considerably thicker and its slots too are wider than thos'e of the shaving head as it is neither intended nor desired that the clipping head cut nearly as closely to the skin as does the shaving head. Otherwise the clipping head and the shaving head are of similar construction as to the foregoing details.
'I'he cutters of both the shaving and clipping heads are of similar construction and shape, comprising rounded ends and 50 with cut-out portions defining cutter bars such as indicated by the numeral 5l for the part of the cutter received in the shaving head. These bars extend a distance slightly beyond or below the narrowed portion of the slots of the guards and as they are reciprocated by the motor, they shear oil' the hairs projecting through the slots of the guards.
The supply of lubricant of the brous material 35 may be readily replenished by simply removing the cap 32 whereupon such material is exposed to view. Similarly, when it is desired to clean or sterilize the cutter, the cap 32 is first removed and then the wheel 26 is moved downwardly whereupon the cutter is free for removal from the guard member.
In the finished device, the cutting area of the slot extends a distance of approximately threethirty secongs of an inch for both the shaving and clipping heads. The slots of the guard member of the shaving head may be of a width of eight thousandths of an inch or less and the slots of the guard member of the clipping head may be one-sixty-fourthl of an inch or wider. 'Ihe bars of the shaving head may be two thousandths of an inch thick at their center and the bars of the guard of the clipping head may be ten thousandths of an inch thick at the center.
These dimensions may be varied somewhat from the dimensions given, for example, the guard members could be thickened at their midpoints if the slots were made wider. The slant of the slots too may be varied from the angle shown which is preferably between two and three degrees, without sacrificing all of the benefits of thisform of slot construction, which permits the cutting of hair over a wider area for a back-andforth movement offthe device over a given locality while at the same time facilitating such action by providing for a shearing effect due to the angular relation of the cutting edges ofthe cutter and the guard.
The-slots of the clipping guard are shown as guard slots extending through a distance somewhat less than one hundred and eighty degrees so as to reduce and prevent excess refuse collecting between the adjacent'sides of the guard and cutter member, as might occur if such slots extended below the contacting portions of the guard and cutter members. 'I'he adjacent sides of the guard and cutter members, as can be best seen in Figure 9, are spaced from each other so thateven if small amounts of hair and the like collect here, it will not impair the operation of the device.
The manipulation of this device does not call for any unusual skill on the part of the user. The curved construction of the cutting faces permit the device being held at different angles without loss of efficiency and the working faces by reason of being arranged on the angle shown with respect to the handle will be naturally presented to the skin in proper position without holding the hand in anunnatural way. The slight recesses or channels formed between the outer edges and the curved central part of the guards tend to stretch out the skin and to straighten out the hairs before they reach the curved cutting part of the cutter heads.-
The ease with which `the device may be sterilized, cleaned and kept properly lubricated, has' been previously pointed out. Ordinarily, however, it is not necessary to remove the cutter to clean out the guard slots. .By turning the start# ing wheel 26 so that the word open" thereon is located between the arrows on one side of the handle as shown in Figure 3, the slots of the Aguard will be found to be in open position and device of this kind, the cutter is rapidly recipro.
cated many hundreds of times each minute and in order to cut the hair it is necessary to insert the hair in the slot of the cutter as Well as in the slot of "the guard. With a cutter slot eight thousandths of an inch wide and with cutter bars from twenty to twenty-live thousandths of an inch wide, it is easy to see that the slots of the guard and cutter are open or in alignment with each other only a small fraction of the time. 'I'he problem here might be likened to threading of a sewing machine needle with the machine running at high speed. If, however, the cutter slots are widened tremendously, as is here the case, the eiliciency of operation of the device will be found to have increased many fold and the hairs will nd their way to th slots of the cutter Without diiliculty.
In shaving with a device of the type disclosed,
the hairs are cut off in furrows of a width equal area equal to twice the width of the guard slots The opening of the whereas if the slots had been straight such cutting area would have been just one half the area stated. The diagonal arrangement of the slots of the guard and-the straight slots of the cutter produces a shearing action when the device is used and the hairs are cut more closely and cleanily than would be the case if the cutting bars or slots were parallel with each other.
Furthermore, it is to be understood that the particular forms of clipping and shaving apparatus shown and describedand the particular procedure set forth are presented for purposes of explanation and that various modifications of said apparatus and procedure can be made without departure from this invention as described in the appended claims.
Having thus described my invention what I claim is:
l. A hair cutting machine having a handle with a movably mounted cutter element. supported thereon, a driving shaft Within said handle having a disengageable driving connection with said cutter element which is adapted to hold the cutter element in the machine, and a part associated with said driving shaft and accessible exteriorly of said handle, said part being axially movable and operative upon such movement to disconnect the driving shaft from said cutter element whereby the cutter element may be removed from the machine. i
2. A shaving machine comprising, a handle, op-
positely disposed cutter heads carried by said handle including outer guard members each having a series of relatively fixed cutter bars and forming an enclosure with a passageway extending transversely of the cutter bars and cutters movably mounted in said passageway having cutter elements cooperating with said cutter bars, said handle and cutter heads being disposed substantially in the shape of the letter Y with the cutting portions of the device located at the ends .of the two branches of the Y, power driving means in said handle, and means connecting said power driving means to said relatively mov. able cutters for reciprocating the same transversely of said fixed cutter bars.
3. A hair' cutting device comprising, a hollow guard member forming an enclosing structure having oppositely disposed slotted working faces facing away one from the other, a cutter member slidably received inside said guard member, said cutter having separate and oppositely disposed working faces with cutter elements presented to theinner surfaces of the working faces of the guard member, and a common manually settable means for effecting adjustment of the working faces of said guard member toward or from the working faces of said cutter member.
4. A hair cutting device comprising a hollow guard member having oppositely disposed slotted working faces facing away one from the other, a cutter member slidably received inside said guard member, -said cutter having separate and oppositely disposed working faces presented to the inner surfaces of the working faces of the guard member, and means for simultaneously shifting the working faces of said guard member with respect to the working faces of said cutter member for adjusting the contact pressure therebetween.
5. A device of the class described comprising, a relatively fixed outer .cutter element and an associated inner cutter element movably mounted therein, and means including a displaceable member for driving said inner cutter element and for maintaining the same' in place in said outer cutter element operative upon displacement of said displaceable member for freeing said inner cutter element for removal from said outer cutter element with the outer cutter element in place on the device.
6. A device of the class described comprising, a hollow handle, a cutter head carried by said handle including a relatively fixed outer cutter