US1986108A

US1986108A - Straining device for vacuum drying apparatus

Info

Publication number: US1986108A
Application number: US678392A
Authority: US
Inventors: Jonsson Augustinus Edvard
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-08-31
Filing date: 1933-06-30
Publication date: 1935-01-01
Anticipated expiration: 1952-01-01

Description

Jan. 1, 1935. A, JQNSSON 1,986,108

STRAINING DEVICE FOR VACUUM DRYING APPARATUS Filed June 30, 1953 2 Sheets-Sheet 1 Jan. 1, 1935. E, JQNSSQN 1,986,108

STRAINING DEVICE FOR VACUUM DRYING APPARATUS Filed June 30, 1933 2 Sheets-Sheet 2 i 1v VEN 76 fiueua Tl/VUS [a v/mo .76/vsson HTTORNEY Patented Jan. 1, 1935 i w? STRAINING'DEVICE FOR V GUUM- DRYING APPARATUS" Augustinus Edvard Jonsson. stockholin s weden Application June 30, 1933, Serial No'. 678,392 j t 1 In SwedenAugust 31,193,}; 1

I The present invention relates to a straining Fig, a'fjs'ection alon'g line C-Cin Figjim Q device in such vacuum drying apparatus as are j Fig. (shows 'aplan view of'a straining'devi'ce provided with a rotating or oscillating drying 7 according tothe second above mentioned form drum, which by means of one or more strainers of the invention.

communicates with a vacuum source, the said Fig." 8 illustrates diagrammatically 'thdmO-i 5 straining device being combined with a cleansing tions of'fthe cleansing .device. according to.v Figs. device, which during the rotary motions of the Sand 7'du1ing the rotation of..thejdrying drum. drying drum by the action of gravity isdis- In the illustrated 'formsof fthefinvention, the placed in relation to the straining. device. Dur-' strainer ,isshown as a p'l'ane strainerJinFigs l l0 ing this relative movement cleansing means and '2 as'asquareplatewith straight straining (such as projections, teeth, needles or the like) slots, in Figs. 3,4, 6 'and'la's a circulardisc pro cleanse the strainer openings. 'f 'vided with a great number'o'f holeswhich; as straining devices of the above mentioned kind illustrated, jinay suitably be arrangedi in" rows.- are described in the U. S. Patent No."1,748,955, The straining deviceisattached to a "gable wall which discloses a cylindrical strainerprovided 0f thedrying and 'thus participatesin the fwith peripheral straining slots, into whi ch exrotating m fi fla f the lat rlt gi-b are tend cleansing teeth arranged on an eccentricalranged; on ,thejoutsideoi a gable llwalloof the ly loaded holder pivotally 'journalled around, the dryin drumahditmay bee c d i -a special strainer and so arranged that'during the rotary chamber thatcommunicates-jwith, the source oi motion of the drying drum the cleansing teeth vacuum... e "1 are displaced in said slots by'reason of the fact In-Figs. 1 and); theysfirainer 1 i PlQYi QQ-W h that gravity tends to maintain saidholder in a. eat um f Of P ralle ra hi fi fla in q a stable state of equilibrium. .Olwingf to the slots 2. .Intdflthese extend projections or-teeth character of the-construction; the cleansing mo- 3 arranged on -a d w h Constitutes a tion will proceed comparatively slowly as it takes W i i p l il e l h m 25 place during a comparatively reat r't f beroftethB corresponds to the number of slots whole revolution oi the drying drum. Further, 2 Th holde weig .ejis lidin ly arranged no reversal of the direction-of the cleansing will alo a s eis ba ,5* e withsvthe a n.- take place, untiith direction of rotation of the. i s l t -'1 e e 'rests e ain tthe bosses 7 3 drying drum is reversed. I on-thefstrainer'and is attached by.meansof the In a. straining device according totheiprsent b lts 6. T th bos es" h e; tte h r si entinvention a much"quicker and more powerful Stops-3, WhiQh m lifli 1 05 Q 't e i h cleansing action takes place and it is carried 4 o i e be te 'id a p thei e out during asmall fraction or a; revolution of part o theetreiner provided-withithe.straining the drying drum. Furthermore, the direction of slots 2 pro ts so w a o the s o d g 35 the 'cleansing action during one revolution will lanse p'er the trai erse h t cleansing be reversei'so thatthe cleansing members, ant; teet a without bstr etionem e d la mg each complete ,revolution, will execute a along h- 5 1 Q 3$l9 n ew t cleansing motion back and roan across the or ou d i the in orde to-p ve m 40 strainer. l purities...accumulating inthe slots from being The two above mentioned forms of a straining packd' togeth r atth.;6nd Pf- S- device according to the invention are by way of r d q fiiml. OWP in ig 3. and-4 difexample illustrated on the accom'pa yingidraw fersflfron theiioregoing form substantially with I regardf totheshape.ofthe straining openings f,

Fig. 1 is a section along line A A in Fig. 2. ,Qt 36..lZQQ-GQS IS Q-mBmbBIS.., e S fdn ll op -.1 45 i Fig. 2 shows aplan View of a straining device" 111957518 HQI 1 e m f O -r according to the first mentioned form off/he long hdldeis 9 fidina p a 11 tha i invention. t I I tached to the frame 10 of the strainer. The

i Fig. sis asection along line 13-113 in Fig. 4. plate is shown, s be gr ular, but may-a o, Fig. 4 shows a plan view of a modification of a 1 1 1 Thgholgs? a e su ta l 50 the straining device'irom' that shown ,in Figs. re d np r s-tme e ng me b s. I and 2. a g consistjofflresilientneedles l1 attached ina fash- 1 Fig. 5 illustrates diagrammatically the m ion'similar'to aibrush on the bottom side of the tions-of the cleansing device accordingto Figs. slidablef'we'ight .4... WhenItheweight .14 slides 1-4 during the rotation of the dryingd'rum along the bar 5', the points of the needle's'l'l will 55 13 is the circular course alongwhich'thecentreof the strainer 1 moves during the rotation ot the drum. The strainer 1 and the bar ,5, are so arranged that their parallelcentral lines will be tangents of said circular.=-c ourse -l3: 'At the position of departure I in Fig. 5, theweight 4 is supposed to occupy the position furthest to the rectipns.

right and to be in contact with the corresponding stops. The bar 5- is, now, horizontal,- but on the ro a i n o he drumin. the ire i n: of the ar ow, the bar ,willlbeein' tiojoccupy an inclined position towardsthe horizontal plane. In a ert n s tion II, the inclination. has become so great thatftheactionfof gravity'along the bar'is equlal to the iiij jitipn.,.v The weight. 4 has ne bee ifhrs eh to a; s a t posi io r a falling motion. Qn the continued rotation of th rum eaidie ine. motion'isi quickly car ied i teed he wei ht sli e erer e the-ether $5. du ing 'which rnotion the teeth or needles eifectathoroughcleansingot the strainer; In the osi ie- I I. t e bar 5. is ver n the ins m ien has b e ii emple ed In; the; position lfy diametrically opposite to positionII, theinclination of, the'bar 5,. is again t e a-new ell n when m b i The weight will; then move ina reversedidirection in relation to the strainer. In position V the'bar ain. YQ TUQ LPHF h e h is-nowflgain 3 h ewerend f hfle a d" a, e fal motion been completed. The j strainer; is

thereupon carried'backftothe position of de-r.

parture iwithout-iurther motion of the cleansinfg membersj Thus, the weight has. duringja revolution of the'drumcompleted a motion back id." th. e em h ba and s q y cleansed thestrainer twice, and, infopposite di weight: will; occur-' in 'the same way According to the form illustrated-in Figs, Sand '7; the holder carryingthecleansing members is v in the form-'of-a weight loaded arm" 14; PiVCtally journalledon a gable wall ofthejdrying drum about the pin 15. TheQstrainer-andithe cleans m L em e e i lth e eeeh w a r i a ie t iesimi aim; ndie: T 'e pivot pin 15" should, ,be arranged between the centre off'the strajnei'g 2 and-the axis of rotation of the drum. The-free-end of the arm-I4 shouldsuitably; constitute awei'ght ofa com aratively.

large mass. Onthe 'side of-the-weightw;turned? towards the strainer," the cleansing embers; areattacheda" Twostops' 17'and liiare.attached? on the gablefwall; oPthe drum in; order. to limit? themotionsofthe-armlh' Said motions during arevolution of theid'rum are diagrammatically illustrated inl.Fig. 8. 19.

' islthe agisof, rotationgofthe drum, and 20'isthe circular uss; along 'which the centre of fth'e,

strainer 21 YniQYFSI duringthe rotation of the drum.-v y he. n sitionfl'oind parture.la h m.

a imated; o esta aihst Tone or, the s ep b Onth e rs o e ien o ;,m tion ;of the drum, the, falling motions'of thep 17. On the rotation of the drum in the direction of the arrow, the arm 14 will at first more and more approach a vertical position. In position II this is supposed to have happened. The arm 14 now occupies a position of unstable equilibrium. After some further motion of the drum, the arm will fall down on account of the action .of. gravity, and the cleansing .is quickly carried out. The arm lw'ill thereupon at first rest against the other stop 18, as indicated by dot and dash lines at position II. On the continued rotation of the drum the arm 14 will .again'approach a new vertical position, which Chas-been reached in position III. The weightloaded end now'hangsdownwards, and the arm has left the contact with the stop 18 and has now occupied a position of stable equilibrium, in

which gravity strives to maintain it.

During the next following period a relative motion will therefor occurbetween the arm 14 and the strainerin an opposite direction to the motionjust described, although slower. During this-relative motion, the strainer is cleansed once more but in the opposite direction. In position IV, diametrically opposite to position I, the arm 14 hangs vertically downwards along the central line of the: strainer. Inposition V, the arm '14 has passed; over the strainer and finished the second cleansing operation. It is realized that during the continued rotation of the drum contactwill finally occur between the stop 17and the arm 14, which happens in position VI, whereway that during the rotary motion of the dryingdrum it is. periodically brought into starting positions for a free falling motion, during which motion the cleansing action is quickly'accomplished. According to one form of the invention, the saidweight is guided alonga straight line by means of one or more straight bars so ar ranged. that they, during the rotary motion of thedrying drum, will occupy inclined positions towards thehorizontal plane, thereby causing the fallingmotion of the said weight. According to anotherform of the invention, said weight is arranged. on a pivoting arm, which is so journalled and so guided by stops arranged onthe drying drum that. theweight during the rotary motion ofthe drum 'will be brought into a state of unstable equilibrium, from which, during the continued rotation-of the drum, it will carry out a quick.. ,falling, motion with accompanyingcleansingioperation.

f The invention is not limited to the illustrated: for'ms. The straining. and cleansing device may ,be modifie'dlin. difierent ways without departing from the spirit of the invention.

Having now particularly described the-nature of my invention and the manner of its operation what I claimnisz .1. A device of the character described, comprising in combination," a rotatable support, a

straining device mounted to take part in the rotary motion of said support, the surface of said straining-device being provided with Strain.

ing openings, a weight-loaded cleansing device provided with cleansing members adapted to enter said straining openings, means for guiding said weight-loaded cleansing device during the rotation of said support so as to bring it to a starting position for a falling motion, during which the cleansing operation takes place by displacement of the cleansing members in the straining openings.

2. A device of the character described, comprising in combination, a rotatable support, a straining device mounted to take part in the rotary motion of said support, the surface of said straining device being provided with straining openings, a weight-loaded cleansing device provided with cleansing members adapted to enter said straining openings, means for guiding said weight-loaded cleansing device during the rotation of said support so as to bring it to a starting position for a falling motion, during which the cleansing operation takes place by displacement of the cleansing members in the straining openings, said weight-loaded cleansing device having means for guiding it in a straight line along the surface of the strainer.

3. A device of the character described, comprising in combination, a rotatable support, a straining device mounted to take part in the rotary motion of said support, the surface of said straining device being'provided with straining openings, a weight-loaded cleansing device provided with cleansing members adapted to enter said straining openings, means for guiding said weightloaded cleansing device during the rotation of said support so as to bring it to a starting position for a falling motion, during which the cleansing operation takes place by displacement of the cleansing members in the straining openings, saidvveightloaded cleansing devicecomprising a pivot arm so adapted that said guiding means during the rotation of the support will bring it into an unstable position of equilibrium, which will be the starting point of said falling motion.

4. A device according to claim 3, and wherein the pivot of said'pivot arm is arranged between the centre of the strainer and the axis of rotation of said support.

5. A device according to claim 1, and wherein said support to limit the swinging motions of said pivot arm.

10. Adevice of the character described, comprising in combination, a rotatable support, a straining device mounted to take part in the rotary motion of said support, the surface of said straining device, being provided with straining openings, a weight-loaded cleansing device provided with cleansing members adapted to enter said straining openings, means for guiding said weight-loaded said guiding means consist of stops attached to v cleansing device during the rotation of said support so as to bring it to a'starting position for a falling motion, during which the cleansing operation takes place by displacement, of the cleansing members in thestraining openings, said weightloaded cleansing device being arranged as a pivot arm so adapted that said guiding means during the rotation of the support will bring it into an unstable position of equilibrium, which will be the starting point of said falling motion, said guiding means consisting of stops attached to said support to limit the swinging motions of said pivot arm and so arranged that the weight-loaded pivot arm willduring the rotation of said support be directed outwards from the axis of said support.

11. A device according to claim 1 and wherein the straining openings consist of straightslots with open ends.

AUGUSTINUS EDVARD JONSSON.