Патент USA US2105529код для вставки
Jan. 18, 1938. E, GERLACH ‘ 2,105,529 SPEED CONTROL SYSTEM Fileq Aug. 6, 1935 ~ - M i i M 20 F 16 / -' ~ 'l5 J l5 /7 11571 ‘ ,8 29 ‘ /9 Zimnentor Era/warm (Ittorneg I Patented Jan. 18, 1938 I _ 2,105,529 ' UNITED STATES ‘PATENT OFFICE 2,105,529 SPEEDv CONTROL SYSTEM ‘Erwin Gerlach, Berlin Siemensstadt, Germany, assignor to Klang?lm m. b. H., Berlin, Ger many, a corporation ofG.Germany ' "Application August 6, 1935, Serial No. 34,929 IniGermany September 7, 1934 3 Claims.“ (01. 188-187) This invention relates to speed control systems such as are utilized in connection ‘with-sound recording and reproducing apparatus, and has cl ‘for its principal object the provision of an im proved apparatus and method of operation whereby means are operated in response to the driving speed of the apparatus to prevent sub stantial variation in this speed. . ' ' between the circumference of the wheel I‘! and . the two disks l5 and I6 may be reduced in prac tice‘ to as small a value as 0.05 mm. so that the governor device will be caused to respond even in the presence of extremely slight departures 5 from the'normal speed. In the known arrangements, a far greater shift of the sleeve ‘ll along Arrangements of this kind have been so de- ' the spindle l I is required to obtain any appre ‘signed that a frictional brake is applied to the _ drive shaft in response to variations in the speed of rotation or‘, according to the position of cen ciable change in the pressure of the felt brake shoes. ' , The axis of the small wheel i'l-‘or the journal 10 trifugal weights. It has been‘ found, however, _ ing thereof is preferably made slightly elastic in order that unduly great mechanical load or stress that the brake blocks or shoes which are nor mally made of felt, are subject to a certain wear _ of this axis may not be occasioned. There may . and tear which makes it difficult to maintain the be further provided two rolls 20 and 2| which 15 rotational speed sufliciently constant, especially when slow variations are to be avoided. spring motor is shown in Fig. 2. This embodi ment di?ers from that in Fig. 1 in that, on the 20 part of the wheel I1 and a step-down gear (not it operatesionly to produce a regu lator action and remains at rest when speed of , The invention will be better understood from 25 the following description when considered in con v Another embodim ent~which is suited for’the drive of the talking machine by means of a According to this. invention, anarrangement 20 comprising centrifugal governor weights is so rotation is constant. act as stops. shown) and a worm 22 as well as a worm wheel 23 the pressure of a brake shoe 24 made of felt or the like is altered. According to this embodi nection with the accompanying drawing, and its ' ment,,the sleeve I 4 has to be changed in position 25 = scope will be pointed out in the appended claims. ' Referring ‘to the drawin ' Fig. 1 illustrates an embodiment of the inven 30 tion wherein a centrifugal mec ' operated _ _ in response to vvariation in driving speed is util izedto regulate ‘the speed of the drive motor, Fig. 2 illustrates a modi?cation wherein the regulation is effected through variation in the 35 pressure of the braké, and ' e mover or to vary the pressure of the brake. upon the sleeve ll between two small wheels i1’ and l "I" which are capable ‘of being actuated by the wheel l5 and operate through the inter- ‘0 mediary of a step-down gear upon wheels 26'v and‘ 26" of a differential gear 21. The planetary wheel 28 of this gear and thus the output spindle 29, according to the departure from the rated speed of rotation, will be shifted in one sense 45 ' weights I 8 are attached through springs I 2. In _ . a The third embodiment shown in Fig. 3 differs 35 from that of Fig. 1 in that ‘a disk I 5 is secured Referring to Fig. 1, I0 is an electric motor driv 40 ing shaft or spindle H to which centrifugal to ment of the brake block 24. Fig. 3 ‘illustrates a further modi?cation which -is'applicable either to regulate ‘the speedlof the ' ' in the direction of spindle ll only the small amount which will sunice to cause actuation of the wheel |1,\whereas in the forms of construc tion known in the past required a shift which caused an- appreciable change in frictional action 30 of the brake shoes. The change in the frictional e?ect which, of course, in the embodiment Fig. 2‘ is likewise necessary, is here insured by an adjust thisarrangement the ‘springs H are connected at their left-hand ends to a collar ?xed on the spindle ll and'at their right-hand end are at tached to at‘sleeve I 4 shiftable along the spindle ‘I I. With this sleeve it are rigidly connected two or the other, and thereby will work on a resist disks‘lS and it which are. spaced aparta slightly ance 19 as shown in Fig. 1 or a brake-shoe 24, ‘greater distance than the diameter of a tiny as in Fig. -2. wheel ll: When the speed of rotation of spindle I claim: .- ll varies above or below the rated or nominal l. The combination of a driven shaft, 8. pair 50 value, the small wheel I1 is caused to ‘revolve > in ,one direction‘ or the other, and by way of a -of members rotatable with and slidable along step-down gear l8 adjusts a resistance I liwhich ' and shaft, a brake including a brake shoear ingknown manner is included in‘ the ?eld or ranged to cooperate with one of said members, a . armature‘ circuit of the motor l0. distance roller interposed between said members and con nected to said brake for controlling the pressure 55 2' i -; $2,105,020 'of said brake on said members and means con necting said roller and said brake. 2. The combination of a driven‘shaft, a pair ofv 'centrifugally-controlied members rotatable with and slidabie along said shaft, a brake in 3. The combination of a driven shaft. 9. pair of members rotatable with and siidable along said shaft, ‘a pivoted brake including a brake shoe arranged to cooperate with one of said members, a. roller interposed between said members and connected to said brake for controlling the ‘pres cluding a-brake shoe arranged to cooperate with * sure of said brake on said members and means one of said members, a-roller interposed between connecting said roller and said brake for moving said members and connected to said brake forv said brake on its pivot. ' . controlling the pre'ssurejof said brake on said ERWIN GERLACH. 10. members and means connecting said roller and 10 said brake.