US 2694251 A
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Nov. 16, 1954 B. TISSOT-DUPONT ELECTRIC SHAVER Filed April s, 1952 o .:.o u-
m M@ P Y im l 6.2/ u M /l 4 D 5 M /l N .2. 5 R m w -fra- United States Patent() 2,694,251 .ELECTRIC SHAVERl Bernard Tissot-Dupont, Annecy (Haute-Savoie), France Application April 8, 1952, Serial No. 281,095
Claims priority, application France lOctober 15, 1951 6 claims. (cl. sti- 34) This invention relates to a dry shaver of the type comprising a series of cutting members or blades which are reciprocated back and forth and co-operate with the inner face of a perforated guard plate, said cutting members being driven from a blade carrier or cutting head sup,- ported and guided by means of an oscillating lever.
One object of the invention is to provide said shaver with a shearing device adapted to cut long hair, While it has been impossible until now to do so with the aid of the perforated guard plate. v
Another object is to provide for the possibility of quick replacement of the guard plate of very simple manufacture and relatively high strength. t y
A further object of the invention is to eliminate the risks of deterioration due to the friction of the blade carrier against the usual slide-bars or to the friction of the blades against the inner face of the perforated guard plate in the event that the latter be deformed under the action of an excessive pressure against prominences of the face, such as the chin, for example.
Other objects and features of the-invention will be apparent from the following detailed description with reference to the accompanying drawings in which:
Figure 1 is a -plan View of the guard plate,
Figure 2 is a sectional view of said guard plate prior to the mounting operation, A
Figure 3 shows the guard plate in operativeposition,
Figure 4 is an enlarged view of the whole shaver, partly in section,
Figure 5 illustrates a detail of mounting of the blade,
Figure 6 is a front view of the depilating device,
Figure 7 is a sectional side view of the said device.
The guard-plate 1 is made of a hard spring metal of about one tenth of a millimeter in thickness, and throughout the area delimited by dotted lines (Fig. 1), it has a great number of perforations or openings of about 0.5 mm. in diameter and a centre to centre distance of more or less one millimeter.
On both longitudinal sides of the rectangular strip constituting the guard-plate,v the marginal portions have a profile such as shown in Fig. 2 and are upturned through an angle a.
Fig. 3 shows the guard-plate 1 inserted in slots of supports 2 and 3. The distance between the supports 2 and 3 is adjusted in such a manner that the guard-plate` 1 may be flexed to a semi-cylindrical form, the axis of which passes through point O and the periphery of which corresponds to a circular sector equal to 2n. Thus, the guide-slots for the guard-plate may be machined at right angles with respect to the inner surface of supports 2 and 3. Another advantage of the profile represented in Fig. 2 is the fact that the perforated portion of the guardplate is completely kept apart from the supports 2 and 3.
ln the general disposition of the shaver shown in Fig. 4, the carrier carries four blades, the details of mounting being represented in Fig. 5. Each of the blades 4 is guided within two vertical grooves united at their upper end by a horizontal groove. Each blade 4 is submitted to a vertical thrust exerted from bottom to top by a pin l'i loaded by spring 6. The blade carrier 5 is cut out with Aa central aperture through which the upper portion of the oscillating lever 8 is introduced. At its upper end, the lever 8 carries-a damping roller 9 made of rubber or a similar material and having a diameter equal to the distance between the two adjacent blade holding members.
2,694,251 Patented Nov. 16, 1954 ICC The carrier 5 rests resiliently on a shoulder of the oscillating lever 8 with the interposition of the spring 11 and of the convex washer 10. The latter has a profile substantially concentric with the oscillation axle 12 so as to enable the bladecarrier 5 to take oblique positions e with respect to thelever 8 without the contribution of will enable said blades, on the one hand, to follow the movements of the carrier, and on the other hand, to bear continually and independently from each other against the inner face of the guard-plate by means of an individual spring for every blade.
This kind of mounting ensures the advantage consisting on the one hand in the fact that each-of the blades may be always placed in the best conditions of cutting While limiting the pressure against the guard-plate and, on the other hand, in the fact that the blades may move 1 back without any risk of deterioration for the guard-plate or for the blades in the` event that the user should produce a momentary deformation of the guard-plate by exerting an excessive pressure against certain areas of the face, such as the chin for example.
The carrier together with its blades is reciprocated by a rectilinear movement at a frequency reaching about strokes per second. In order to obtain the maximum eh'iciency, the amplitude of the movement should be at least equal to the distance separating two consecutive blades from each other.
The spring 11 is designed so as to balance the cornbined thrust of all the springs 6.k As the blade carrier is made of light metal, the weight of the carrier togetherv with its blades is unimportant in comparison with the strength of the springs 6, as may be stated by a satisfying working in any position.
The depilating device of the shearing type (Figs. 6 and 7) is composed of a iixed rectilinear comb 13 comprising a certain number of teeth, of a cutter 14 comprising also a certain number of teeth, the width of these teeth being superior to the interval between two teeth of the comb 13, whereas the interval between two teeth of the cutter 14 issmaller or equal to the amplitude of oscilla-- tion imparted to said cutter.
The cutter 14 is continuously pressed against the inner face of the teeth of comb 13 under the action of two springs v15. The back and forth motion is produced by means of the crank-pin 16 rigid with the part 17 mounted oscillating with the shaft 12, said crank-pin being engaged with the fork formed at the lower side of cutter 14 l. A cutting device, comprising in combination, an
elongated housing open at one end; a perforated plate member mounted on said housing covering the open end thereof; a lever member mounted in said housing for oscillation about an axis normal to the axis of said housing; a support member having a base portion extending substantially parallel to said plate member and mounted on the end of said oscillating lever member for movement thereby; cutter means resiliently mounted on said support member extending toward said plate member and in yieldable contact with the inner surface of said plate member; and a bearing member mounted on said lever member between said support member and the axis of oscillation of said lever member and having a curved surface bearing against the base portion of said support member, the center of said curved surface lying in member is reciprocated along-a line substantially parallel with said plate member and at a uniform distance therefrom:
2. yAy cutting device,'1. comprising'.' in" combination,l .an elongated: housing open. at .one end; a*perforated .'plate' member mountedonrsaid housing covermgtheopen end thereof; a lever member mounted in.'v saidlhousing for' oscillating. about anaxis'normal tothe laxisof said Thousing;.az.support'member having aibaseportion extending substantially .parallel to said platememberand vmounted onzthe .end of said 'oscillating lever memberrfor. movement thereby; cutter' meansiresilientlycmounted. on said supporti'- member i extending.; toward said. plate. member.
andiinf yieldableflcontacti with. vthe i. inner .surface of said plate member; a, bearingrmember .mounted on: said Alever member between said support member and lthe axisof oscillation of'saidLlever 'member and. having ai curved surface bearing against .thesbase portion.' of 'said support member,'.thescenter.of saidlcurvedsurfacclying in the axis of oscillation of-said Alever member; and resilient meanson saidleverfmember'permanently urging said bearing member against .said'base portion ofsaid. support member, whereby during .oscillation of said lever member said support'member.. is reciprocatedialonga. linezsubstantially parallel with saidiplate .member and:
at=a1.uniform distance therefrom.
3.' A cutting' device, comprising in combination,I an' elongatedthousing' openA at one'end; a .perforated plate member mounted. on said housing covering .the open lend' thereof; a `levertmember mounted. in said housing for' member, the'center of said'curved .surface 'lying in the' axisLof oscillation of said lever member, whereby during oscillation of said lever member saidsupport member is reciprocated along'a'line substantially-parallel with said plate member and at a uniform distance therefrom; comb means having a-plurality of comb-elements arranged on the .outer surface of saidfhousing'along said perforated r plate member;' a cutting member having 'a'pluralityjof blade portions'fewer than Lthefnumberrof said comb 'ele-- ments in contact with' said `comb' elements -and operal tively connected to said oscillating lever member' for movement therebylsothatfsaid'blade portions arerecprocated'along 'said comb elements; and'resilient means securedto the outer surface of said housing permanently urging'sai'd cuttingsmemberrinto'contact with said `comb means.
4..'A cutting deviceycomprising lin combination," an. elongated housing open at one end; a perforated plate' member mounted on'said housing covering the' open end thereof; a lever member'mounted 1n said housmgfor oscillation about anaxis normal tothe axis of 'said hous-V mg;.a support member fhaving a'base portion extending substantially parallelA to said plate member and mounted oni'the end of said oscillating lever member for movement thereby, and having a plurality of blade holding portions projecting from said base portion=1towardisaid plate member; a plurality of blade members carried by saidA support "member,l each-blade t member beingmounted in one of said blade holdingsportions thereof, extending toward and being resiliently urged into yieldable contact with the inner surface of said plate member; and a bearing member mounted on said lever member between said support member and the axis-.of oscillation of said lever member and having a curved surface bearing against the base portion of said support member; the center of said curved surface lying in.. the axis of oscillation of said level-"member, whereby-'during oscillation of said 'lever member said supportnmember is reciprocated along a line substantially parallel with said plate member and at a .uniform -distance therefrom'.
5. A cutting device, comprising in combination, an elongated housing. open'at one endg-.a perforated plate member mounted on said housing covering the open end thereof; a lever member mounted in said housing for oscillation about an 4axisnormal. tothe axis of said housing;v a :supportrn'emberhavingI a base .portion extending` substantially fparallelto. saidv plate member and mounted on theend -of` saidfoscillatinglever member for movement thereby,-V andhaving-a plurality ofblade holdingV portionsrprojecting'from saidbase portion' toward'said plate member; 'apluralityl of blade members-carried by saidsuppor-t member, each bladernem'berbeing mounted-- in .oneo saidblade .holding portions thereof, extending toward and being resiliently urged into -yieldable contact' with ,-the. inner. tsurface of saidrplatemember; .a bearing member. mounted onsaid lever' member between said support member and the axis of :oscillation of :said lever member and;havingaacurved-.surface bearing against the baseportionof .saidssupport member, the center of said curvednsurface:lying-in ther'axisifof oscillation -of said leverfmemberand.resilientvmeanson said lever member' permanently/V urging.; said bearing .v member againstt said base portion 'of .said support .member, whereby during oscillation of said leveramember'said-support member' is reciprocated alongga 'line'. .substantially parallel with said .platermember and at a uniform` distance therefrom.
6. A cutting device,..comprising in combination, an elongated Yhousingfopen atoneend; a perforated plate member mounted'.onfsaidhousing covering the 'open end thereof; a lever member mountedin said .housing for oscillation-about-.an axis normal. totheaxis of said housing;..an` elongated .support "member having a -base portion extending substantially parallel to said plate member and lever member l.betweentsaid support member and the axis.l
ofV 'oscillation` of-saidv :lever .member f and having a .curved surface bearing against the base portion of 'said support membemtheecentertof saidv.curved..surface ylying 1n f the axis of .oscillationsoff .said lever. member, whereby duringgoscillation off-saidlever memberzsald support' mem- Y ber is reciprocated along a line substantially parallel wlth' saidfiplate. membersandy .at a uniform distance therefrom.
Rfrences ACited in, theleof this patent UNITED" ST ATES` PATENTS" Number.. Name Date 2,296,134, wright .Sepe 15,- 1942?. 2331,46@ Going. ocr. 412, 1943 2,342,808.
Johnson Feb.. 29, 1944? v-