US1318568A

US1318568A - Hoist

Info

Publication number: US1318568A
Authority: US
Publication date: 1919-10-14
Anticipated expiration: 1936-10-14

Description

' 3. W. KITTREDGE.

HOIST.

AN'LNA'I'IOII FILED DEQ. l5. I9l5.

Patented Oct. 14, 1919.

2 SNEETFSHEET 2- A TTORNEY JOHN W. KITTBEDGE, OF AKRON, OHIO.

HOIST.

Specification of Letters Patent.

Patented Oct. 14. 1919.

Application filed December 15, 1915. Serial No. 66,996.

To all whom it may concern:

Be it known that I, JOHN W. Krrrnnnen, a citizen of the United States, residin at Akron, in the county of Summit and tate of Ohio, have invented a new and useful Hoist, of which the following is a full, clear, and exact description.

My invention relates to hoists in which an electric motor operates a winding drum, and is applicable to derricks, cranes, mines, elevators and the like.

The objects of my improvements are 1st. To provide a hoist of small first cost,

' size and weight.

2nd. To make it simple, working with few operations on the part of the operator, thus economizing labor, time and skill.

3rd. To eliminate the wearing parts and thus reduce the friction.

4th. To rovide an automatic sto and prevent accidentally hoisting the loa into the overhead sheave.

I attain these objects by the mechanism shown in the accompanying drawings, in which;

Figure 1 is a longitudinal cross-section; Fig. 2 is an end view; Fig. 3 is a fra mentary side elevation with the upper ha f in section.

A. 'ven piece carries the same number throughout the several views. For convenience of description, parts fastened rigidl together are cross-hatched alike thoug they may be different pieces of metal. In such a case the whole part, moving as a single piece, is designated by a single numeral, as 8, and different ends or faces by that numeral with letters as 8*, 8 8 etc.

The machine consists of a base 1, suporting housings with bearings 2 and 3 earings 2 and 3 carry the rotating armature of a motor 5, similar in function to the starter of an ordinary motor but differing in form, and the rotating armature 5 carries the rotating field 6, and the shaft 6 which are entirely similar to the corresponding parts of commercial motors. The rotatin armature 5 ma rotate in its bearin 2 an 3 and its perip ery is in the form 0 a drum 5, and winds the hoisting rope 7 Electric current is brought to the rotatin armature by the collecting rings 5 and t e brushes 3 held in the sup, ort 3 .-The,,collecting rings are insulate by the insulator 5.

On its outer end, the rotating armature 5 carries an annular gear 5. The shaft 6 carries a pinion 8 turning loosely on the shaft. A clutch, hereinafter described, grlps it to the shaft at the will of the 0 erator. The pinion 8 has a sleeve 8', an on this sleeve is mounted a second annular gear 9. Mounted on the shaft 6 and the sleeve 8, are two disks 10 and 10 carryin the shafts 10 and 10 and on these two s afts are mounted two double gears 11 and 12. The disks 10 and 10 are bolted to the filler plates 10*" shown dotted in Fig. 2, which binds the disks rigidly together without interfering with the ears. The gears 11 and 12 mesh with t e pinion 8 and also with the annular gear 9, forming a set of planetary gears, shown by their respective pitch circles in Fig. 2. The gears 11 and 12 mesh with the annular ear 5. The ratio of 5 to 11 or 12 is sligfitly different from the ratio of 9 to 11 or 12 Thus as the gears 11 and 12 are rotated, a slight difference in the speed of rotation is transmitted to the annular gears 5 and 9.

To illustrate :Suppose the pinion 8 to have 24 teeth; gears 11 and 12 to have 62 teeth each; gears 11" and 12 to have 21 teeth each; and annular gears 9 and 5 to have 148 and 107 teeth respectively. Supose the annular gear 5 is made stationar or the time being, as by having the rope fastened to a heavy weight 15, and suppose the pinion 8 to revolve counter clockwise, as indicated by the arrow. The disks 10 and 10 revolve in the same direction as the pinion but more slowly, and the double gears 11 and 12 move about the central shaft 6 and also turn on their own axles 10 and 10. Gear 9 moves slowly clockwise.

Now suppose the annular ar 9 is brought to rest by a brake. e pro er brake for this purpose is not a part of t is invention and for purposes of this patent ap lication a simp e band brake 13 and pedal 14 are shown. The pinion 8 and gears 11 and 12 rotate almost as before, and the annular gear 5 revolves slowly counter clockwise or in the same direction as the pinion 8 and raises the weight. With gears as above described, the pinion 8 running 1150 R. P. M. turns the gear 5 and the drum 85 R. P. M., and with a itch diameter of 27 ins. for the winding rum, gives a hoisting speed of 600 feet per minute.

15 to drop. Both annular gears 5 aged 'Weig t and 9 now turn nearly together and earrythe train.

of gears around with them. It will be noted armature are connected by the train of gears, they have a definite speed, relation but with the brake released, there is no mechanieal connection and an eleetriealrelhtion ohlfgi The pinion 8 was said above to be loose on the"shaft6. It is"cofnl1i1ec tecl to it a done clutch; 16 which motes(longitudinally on the shaft 6 but is helglto the 'o'fie i n s the we f ft fea e y elirtch 16 enga eshfleene which is itiediw th. hep pie bed etee i thlt e 1 3 ear ng The o e pri h fif fanon r, g a 5? has s hr rdfi an 1 Le ti a: r 20. The reel}; 20 passes t roljgfhla holein the lever l9 an'd, .as the tlrnnrhoists, the Screw thread 5 inoves raniiQQ toward the lever 19. The rack 20 is itse f threaded and carriesa win 1111521 theloa'd flfi reaehed a certain predeterntitieallheiglrt, the nut 21 comes in contact iththe lever 119 v the rack 20 continqes to rnoi e, coinpresse f he p i g 18 and -forc sf the @0119 ea h. 9 91 g e ee' pwith ewe-e189. Qirieg dlfie' fim 'i t ge'l th 0f h evexe e t 2 ng uide a the .ieq t the 11 It i it di ei nmment 91 g the shif 6 a t w en mel simm rs whichma j enga'e a eon eave ga e 1Q? in th he; he as g gihg. th i a weaker prmgt e 1, epr te 8, beet ag'ams't p1ece8, en bothleprm gis arefree 5 ett n mes we s 16. rw i h ed ier t he f m e s! rq ffeut o t e ah d t i sme d p ereta ng field 6 Lb he ge tr .e mp ing fiisjc m p e dfi t dut h dit eage by t lev l-('1 he er i ew -teete'i efie e? am e eeixze eea. rene iiete agre t me dwe eeet etke g t er it t rq tneshefi 241 e flame a. i @941 wi th we ands th eeer m e etler andis a hraker N .T e a, eeee hem ee tterw ebe t i f eth rbeild eg e e eerie? he k tbrfi thngith f3- t e e keme g tlr he l-2 in th gui e b We set? :5 t ee e ee m m eewt wt p igfflfi? 12 st fie eeee reedt e e t m sem e i hee e z' fwe hqlh ll we e ewe: .4 4 t e mew e the gwen e ght pm it; gnq re .wer the ladeem e i Ehemeeeef r efinin r herr z n fihee eweEe-ee axe et-re enha iteis, nrn 19 2- :9; r t ei eek f r nefillm th ve ne mplw qlewe t 1 ha d hrek f t a reiqwe h S re r adfi? t ins,- eth dt reqt eae mung melee git "gijsegie'gggesg g1 the lever --19,-"dil li g egs the o rake mid sets the cone clutch 16 ready to lift another r ibucketfuln 'lhus the operator lifts the bucket, holds it stationary, lowers it, and eontrols the speed of the lowerm by two operatlons, only, the setting and releasing of V the handbrake 13. This effects a considerable saying of time and labor over a hoist that lras'the brakeand the connection to the power in separate mechanisms, controlled by separate levers, or one in which it is necesfar: tothrow off the power before shifting to the other. As the f m 0 1 mechan sm the rade inereases from the confieee iefibu ke refill ei'w flne h buck-e11 can e stopped ata g'reate "height simply sew n h W ne" ht d ta all g the re k fitlife threaolbF is an inch pitch and the drum eireninferenee is feet, then moving the wingnnt 21 an inch along the rack 20 changes the height of the stop 7 feet. It will be observed that the stop is a given distance from the machine, not frond the point of loading"; The consec iltive buketsfnl can be loadetl attl ifierent levels, but under the action of the vi ing nntfll Willstop at the same level.

The

s ri n 18 is held in lace b a in P g r v a nut in 3: on a threaded portion 20f the shaft 6 Winn it is'n'ecessarytohoi st consecutive lpaglstogijfierent heights thewing hut 23 is fi rfeifbwkilt lldelf ee th p iig 8 operative and the Wing nut 21 is screwed becke tirelr aweytromt e e r T Sets; the brake 1U? disconnects from the power; theihandleyer 1 9, the operator can th en throit on the power and release the .hrelielw a will mad e v r I 11s is a eneral description of my inven- The fl l ggn'res for" gears, speeds, etc., are, of course, for illn'etration only, as the design adaptable to many speed redrictions Kareem? he cehle e}, b j 3 t we ee ihea e e wew w t d m e nvaeean t Seine. dntt n st rotating fielcl, anol to hoist 'When running vin th e qsite d ee e i Je nd 91 11 3 mee ceioe are VIY QI I thereof-e A tim e t ng; thus g eser lliecl my invel rtion, I e aip xa-s new d 5 6 5 teec' ie by Le t r emhea t; the e 12 P e 1 e eeeme eie *i tithel'te tie th the brake is engaged and the clutch is released and adapted to automatically release the mechanism when the clutch is engaged.

2. A drive shaft, a windingdrum, a cable on the said winding drum, a planetar gear train from the drive shaft to the winding drum, a clutch engaging and releasing a member of the said planetary gear train, a friction brake, a connection from the said friction brake to the drum, a connection.

from the said friction brake to the clutch, the connection being such that the friction brake automatically engages when the clutch releases and automatically releases when the clutch engages, and frictional'means manually control-led adapted to permit, to retard or to stop the backward rotation of the drum.

3. A drive shaft, a winding drum, a cable on the said winding drum, a planetar' ear train from the drive shaft to the win ing drum, a clutch in the said planetary gear train, brake control of the said drum automatically operated, the arrangement being such that the brake sets automatically when the clutch releases and that the brake releases automatically when the clutch engages, and brake control of the said drum controlled by the operator.

4. A drive shaft, a winding drum, a cable on the said winding drum, a planetary gear train from the drive shaft to the winding drum, a brake controlled by the operator adapted to permit, to retard or to prevent the backward rotation of the drum, frictional means engaging and releasing a member of the planetary gear train, and thereby, when the man-operated brake is set, aetuating and releasing the said drum, and a brake operated automatically, the arrangement being such that it engages automatically when the said frictional means release the said member of the planetary gear train and that it releases automatically when the said frictional means engage the said member of the planetary gear train.

5. A drive shaft, a winding drum, a cable on the said winding drum, a planetary gear train from the drive shaft to the winding drum, a clutch engaging and releasing a member of the planetary gear train, a brake controlled by the operator, a connection from the brake to the drum, the said brake adapted to hold or retard the drum against backward rotation, a second brake automatically controlled, a connection from the second brake to the drum, a connection from the second brake to the clutch, the connection being such that the second brake automatically binds the drum against backward rotation when the first brake is set and the clutch is released and automatically releases the drum when the clutch is engaged, an auto matic stop adapted to disengage the clutch and an adjustment on the said stop whercb it can be set to disengage the clutch at d1 ferent predetermined positions of the cable.

6. A drive shaft, a winding drum, a rope or cable on said winding drum, a gear train, said gear train connecting the drive shaft to the winding drum, a brake, said brake engaging and releasing a member of the gear train, a clutch, said clutch engaging and releasing another member of the gear train, the brake adapted to connect and disconnect the drive shaft from the winding drum when the clutch is engaged, the clutch adapted to connect and disconnect the drive shaft from the winding drum when the brake is engaged the brake also adapted to hold or retard the drum against backward movement when the clutch is released, another brake, said second brake automatically engaging a member of the gear train when the clutch is released and automatically releasing said member of the gear train when the clutch is engaged.

7. A drive shaft, a winding drum, a cable on said winding drum, a gear connection from the drive shaft to the winding drum, said gear connection comprised of a set of planetary gears with carrier adapted to carry the lanet gears around the. central pinion, a hand brake, said band brake engaging and releasing a member of said gear connection, a clutch, said clutch engaging and releasing another member of said gear connection, the hand brake adapted to connect and disconnect the drive shaft from the winding drum when the clutch is engaged, the clutch adapted to connect and disconnect the drive shaft from the winding drum when the hand brake is engaged, frictional means adapted to automatically engage one of the said gears with the carrier when the clutch is released and means for automatically releasing the said gear from the carrier when the clutch is engaged.

8. A drive shaft, a winding drum, a cable on said winding drum, a gear train from the drive shaft to the winding drum, a brake retarding and releasing a member of the gear train, a clutch actuating and releas ing another member of the gear train, the brake adapted to connect and disconnect the drive shaft from the winding drum when the clutch is engaged, the clutch adapted to connect and disconnect the drive shaft from the winding drum when the brake is engaged, the brake also adapted to hold or retardthe drum against backward movement when the clutch is released, a second brake adapted to automatically hold a gear of the train against backward movement when the clutch is released and adapted to automatically release said gear when the clutch is engaged, an automatic stop adapted to disengage the clutch, and an adjustment on said 4= enem stop whereby it can be set to disengage the and releasing one member of said power clutch at. different predeterminedpdsitions transmissibh, the arrangement being such of the cable; that when itis q a sa, power can be trans- 9. An electric motor corn rised. of an inner mitted thi'qugh its member and 'fcannot be so trans- 25 5 and an enter member; trunniens on'said outer when it is released, power member 'and the said outer member revohimitted, a, elufieh in said power transmission, ble thereon, bearings and the said trunnions a second brake; said seeond brake auto supported therein, a, drive shsft'and the said maticeliy engaging a member of the power inner member supported thereon and rigid transmission when the clutch is released and 10 therewith, bearings within the ti'unnions of releasing said member when the eiuteh is en- 30 the outer member and, eoneentrie there ga%ed'. with, the said drive shaft ourneied in n testimeny whereof, I have signed my the said hearings 'in the tnunnions of name to thiss'peeifieation in the pnesenee of the outer member and revel ubie'therein, a tw n subscribin' witnesses this llthday of 15 windircigh drum,hthe winding ijirunii5 December, A1915.

afoun t e eri eryo t (5 enter mem ero the mania ir iteg 'aljtherewith simseheni- JOHN KITTREDGE- cal power ti'ensinissionend the said power Witnesses: tfensmission eonne-cting the'saiid'drive shaft EDWIN WR eHT, 20 to the said winding drum, a brake engaging W H. STOgER.

Washington, D. 6.

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