US1875118A - Elevator safety device - Google Patents

Description

Aug 30, 1932.

F. L. OHLERET AL ELEVATOR SAFETY DEVICE Filed Dec. 16, 1929 2 Sheets-Sheet l Aug. 30, 1932. F. L. OHLER ET AL ELEVATOR SAFETY DEVICE Filed Dec. 16, 1929 2 Sheets-Sheet 2 g 10 between an abutment.earried.\by;thefim I l5 tly; causes the. roller. to. mutilatethe surf which itengages, especially the edges .thereof,;

5..l itt1e'.dainage.to theparts eng 301 thereofl will. be more particularly-"exp 1 lti on to an elevator installation.

.. 5. :shoIwingrthe .position-fofzthe p Patented Aug. 30, 1932 I seamenorgan A m RO AND 2., r tnuomor TOLEDO, oH-Io, AssIeNoRs To THE HAUGHTO ELEVATQR serum: DEVICE 'IThlS invention. relates to an:eleWltr.. -Ii ty' device adapted toloe tripped into operation -;to stop the car abruptly. when its speed fi v ;..ceeds a predetermined limit. :ln cars which. normally. travelat a comparatively low speed,.

' ,.in order. to IBCl'LlCGwtl'lQGOSt .of installation asg cfarLas is practicably. consistent with safety, it

;. is common. to provide. assafety ,device kno'wn the guide along. which; thekcari travels. 2' In the (operation of. rollergrips, as. heretofore constructed, the tremendous p ssu .;.veloped by the .momentumof the earzfreq le -a aces,

\. iandoiften causes the roller tobecomepel ial y embedded so. thatv it is extremely diffi u t i withdraw it.

- 1 the: object 01E the present invention .tO. rIfJrQSide a aldeviceof the character stated which is sim-r .ple, .practicalvand comparatively inexpensive, cwhicliflmaycbe. operatedwith comparatively aged, and which 1' =..may be easily restored. to..nor'1nal=.0jr, inactive position.

4 '1 The. construction. iOffk the invention, in its a resent embodiment, .and: the advantages, lainedi in connection with; the accompanying drawings, in which 7 Figure 1 is a. moreor.less 'diagrammatic View illustrating the adaptationsof the inven- Figure 2. is a. horizontal sectionithrough theibottom of acar. with the invention, installed thereon.

v Figure 3. is. a frontwlev ation -16; the parts Figure 4 isa side. elevationzofthie invention showing the same in normal or inactive posi-.

tion. i Figure 5 is a:view. similar .to' Figure ibut arts after; the ;.deyice.ha ..been tripped to [stop the car.

' As i lu t at d nithe d aw ngs, the i lV f zt pn is ssoe at dwi h n le t 're r l which is connected .to aicountelweight 2 .by ropes:

r ables. izlb serop Q b rr slw moun ed. :t1 ..re 1 9. and; -2 lfl/Viththe. aboveconditions in..min ','i

. safe yde i e asr e c r, t t-1 1 withv shoes or; channel portions whip a drum e l ieh m mbe dr wn a w table, ragurne1; to. inoye the loan vertically J lee- .tw ea sui me l 5 e' ewt u h I ZHIDQ S ele sf t e ea h i 63 Le -m governor rope 7 vis connected. norrnallygljor 7 travel with the c-ar '1 andfpasses, ahouttan l pper-sheave 1Q ancl;about a lower tension- =i ezs wa e. --g .ifh s ,e' r 'rn r rap h a ba llc securedgthereto and normally'held'fiii a n clan p l2 which is Y attached to: the ,of. the .car. Iheplamp 121s held in gripping relatime o t eb l 1 br. a: ifi, p iii'i ylQlCFl IOQQITHQlt lQhG ball to escape only when the, rope 7 is. suddenly stopped while the car continues to travel downwardlyfI In', orue1; that. su iopemtipa m y ake P a th :.-l wnwa t ar li f. exce s P determin d 1 sp e a yrb mewsear e a I sha tlfio iwh h. t she eis awed, This governor is so ,arranged. when. it 1 reaches a predeterrnin ed speed, it actuatesl an e centr 1' 6 memet e were e i l'th mer 7 an st p-i s. eveme 1 L'rQr 7 a b an h. 8. ah i hi s. e eur y a lame 17 to a tripping lever 18Pwhichjtripsfthe' es its travel. As shown inFigures 2, 3,, aand 5 thetrip- ,ping lever;;18 isifiarriecl by alkal 19 Whi is. secured to a .sl aft- 20. 512E116; shaftjQO mounted for rocking movement, in brackets L i 5 1. whi a e se ured. 1 ars 2 P t i lbqttom of the car. These hracketsQl, one of which is located at each side of t hepai ar forined 1 receive the guide rails 5, each channel portion being formed with vertical facefll contiguous to thefaeemf the guide rail and withganopp osed .facefZl which is,,in,cl ined upwardly toyvard the oppos e fa et ara 2 An arm. 2 which is secured to the: shaft ,20,.,ca1{ries, at I its end a-rell rn 6, w i h aadq i move upwardly ibetween; the .guide rail 5 fand gthe inclinediaceQfl Wheneverthe tr pping device isactuatedto rockthe shaft 20... A springflf v is. connected to; the shaft QQ and normally holdsthe IrollerilQG in inactive (position with the posit iqri oiflthe ,rg ller limited {by al pin 28 agaihs t wh ch itrestsf It beunderstood thatyvhen the device is trippedto rock the shaft20, the roller 26 j at each side of the car will be wedged between the rail and the inclined face2t to stop the downward movement of the car, the'mount- 5 ing of the roller allowing for the arcuate movement of the" end of arm 25. v In order to prevent damage as far as possible and to prevent the roller 26 from becoming stuck so hard as to cause difiiculty in removingit, a

rests against the face 24. This gib has a laterally turned end 30 which is mounted on a stud 31 and yieldably held against a shoulder 32 on the bracket by a spring 33. By providing' these removable gibs it is practicable will not be easily crushed'by the momentum of the car, and if they are damaged they may be very easily replaced. a The yieldable character of'the mounting for these gibs, in connection with their inclination, makes it easy .to Withdraw the'rollers 26 along with the 'gibs, after the safety stop has'been effected. 'Ashoe 34 is secured to each bracket 21 justed by means of a screw 36 to securethe proper working clearance between the shoe The roller arms aresoset on the shaft20 as to bring the" and the guide rail 5.

rollers 26 closelyagainst the bottoms of the channel portions ofthe'brackets 21 and at fan appreciable distance from the free edges :ofthe channel, so that when the safety device will not channel portions 37 for receivingthe inner edges 'of the rails 5L Thus'the inner edges of the rails 5rar'e always completely protected 'againstcrushing. a

Wh'le the invention is primarily intended forinstallations where the travel of'the car doesnot -exceed 100 feet per minute, it isnot necessarily limited to such use. Many of the details ofthe construction may also be modified without departing from the scope of the invention as claimed; I

' What. we claim is:

1. The combination with a vertical guide rail, ofa body movable adjacent said rail,

" a clamping member carried by thebody a and having converging faces; one of said "faces being engageable with the rail, a gib o the other face, a roller movable into wedging engagement between the gib and ,the'rail, and means for holding said gib, said holding means being yieldable with the gib. in the direction of divergence of said 2. The combination with a vertical guide rail, of a body movable adjacent rail,. a clamping member carried by the body and having 'converging"faces,"one of said i fac'esbei'ng engageable with the rail, a gib,

and the rail, and means forjh'olding sai vgib;29,preferably of case hardened steel, 1

to'make them sufliciently hard so that they 'bymeans. of an angle 35 and'may be adis actuated, the outer edges of the channels 1 be crushed. The bottoms of these channels agalnst which the rollers bear, are raised somewhat, leaving deeper narrow faces to facilitate the release of the roller.

on the other face, a roller between the railand the gib, an arm on which the roller is carried, said arm beingmounted on said body and movable thereon to bring the roller V into vvedging engagement between the gib gib, saidholding means being yieldable with the gib in the direction of divergenceof said faces to facilitate the releaseoff the rollenp 3. The combination with a vertical'gui'de 5,

rail, of a body movable adjacent saidrail, a clamping member carried by the body and i having converging fa ces, one ofsaid faces being engageable with the rail, a gib on the other face, a rollerbetween the rail and 8 the gib, an arm-on which the roller is carried, a rock shaftmounted on'said body and having said arm securedthereto, a lever .secured to said shaft and operable toxrock the same-to bring the roller into 'wedging' engagement between the giband the rail, and means forholding said gib, said holding means being'yieldable with the gib in the direction of divergence of said faces to facilitate therelease of'the roller.

a. The combinationwith a vertical guide rail, of a body movable adjacent said rail, a member carried by the body and formed with a channel portion embracing said rail, one sideiof the channel having avertical c face contiguous to the rail, the other side of the channel having a face spaced from the rail and i upwardly convergent, a wedge member movable into wedging engagement Y between the rail andsaid convergent facaj andmeans for maintalnlng sald wedge member atan appreciable distance from the. free edge-bf said channel portion and the edge. of

said rail to prevent crushing ofsaidaedge's.

5; The. combination with a vertical'guide m trail, of a body movable adjacent said rail,

a member carried by the body andformed with a channel portion embracing said frail, one side of the channel having. a vertical face contiguous to the rail, the other side of the channel having a face spaced from the rail and upwardly convergent, and awedge member movable into wedging engagement between the rail, and said convergent face, the bottom 'ofsaid channel havinga p'orl l tion' adjacent said vertical face which is deeper than the rest of the bottom, to receive the edge of said rail and protect it from the crushing effect of -the wedge member. 7

6'. The combination with a" vertical guide rail, of abody-m'ovable adjacentsaidlrail, V a member carrie'd'by thebodyi andfformed with a channel portion embracing said-rail, one side of the channel-"having.aivertical face contiguous to the rail, the other sidedthe channel having awface spaced from-the rail and upwardly convergent, a gib onsaid convergentface, a wedge member movable into wedging engagement betweenthe gib, andthe rail, means for "maintaining 'saidfte wedge member at an appreciable distance from the free edge of said channel portion and the edge of said rail to prevent crushing of said edges, and means for holding said gib, said holding means being yieldable with the in the direction of divergence of said faces to facilitate the release of the wedge member.

7. The combination with a vertical guide rail, of a body movable adjacent said rail, a member carried by the body and formed with a channel portion embracing said rail, one side of the channel having a vertical face contiguous to the rail, the other side of the channel having a face spaced from the rail and upwardly convergent, a gib on said convergent face, a wedge member movable into wedging engagement between the gib and the rail, the bottom of said channel having a portion adjacent said vertical face which is deeper than the rest of the bottom to receive the edge of said rail and protect it from the crushing effect of the wedge member, and means for holding said gib, said holding means being yieldable with the gib in the direction of divergence of said faces to facilitate the release of the wedge member. s

In testimony whereof we have hereunto signed our names to this specification.

FRANK L. OHLER. ROLAND P. FRENCH.

Images