US1866149A - Roller guide - Google Patents

Description

July 5, 1932. J. us 1,866,149

ROLLER GUIDE F-iled Aug. 13, 1929, 2 SheetsSheet l jwoentoc as, Daw'dJ binw' I c'lttow July 5, 1932, BINUS 1,866,149

ROLLER GUIDE Filed Aug. 13, 1929 2 Sheets-Sheet 2 gwomtot UN b STA Patented July 5, 1932 I :7.-

DAVID J. BINUS, OF CANTON, O HIO, se ment rHE WEBER DENTAL .MANIITFACTIQIB-I ING COMPANY, or CANTONpOHIO, A CORPORATION-JOE OHIO ROLLER GUIDE;

Application filed e is, 192 9. Serial no. 385,616.

My invention relates to roller guides more particularly for use in connectionwith the telescoping sleeves of dental chair elevators andthelike.'

Such elevators may include "a plurality of telescoping sleeves or'hou'sing sections, and it is necessary to prevent thesleeves from rotating with respect to'each'other in order to maintain the required longitudinal alin'ement of'the elevator'parts, and it has been found that'mere interfittingsli'ding guides are diiiicult and expensive to manufacture, and are'subjectto excessivefriction, causing wear of the sliding surfaces, and are further more very'diflicult toprovidewith suitable adjusting means for taking up the wear.-

Accordingly the objects of the present invention includesthe provision of improved roller guides for use between two members longitudinally movable with respect to each other, such as the telescoping: housing sections of a dental chair elevator, and toprovide novel adjusting meansfonsuch roller guides. V These and ancillary objects are attained in the present invention, as will hereinafter be set forth in detail and claimed, and which 7 may be stated in generalterms as including the combination with two members 1 ongi-' tudinally movable with respect to each other of a longitudinally extending rail preferably removably secured on one member,-'one' or more shafts mounted"; on the other member and extending cross-wise of the rail, and a pair of preferably conically' shaped rollers rotatably mounted on each shaft with the apexes of the rollers adjacent each other for rolling on opposite sides of the guide member,

anti-friction thrust bearingslfor the rollers, and means for adjusting the spaclng of the rollers on the shaft. e

A preferred embodiment of the invention is illustrated in the accompanying drawings forming part hereof, in which Figure 1 is a fragmentary elevation view of a telescopic elevator for a dental chalr orthe like, portions of the intermediate telescopic member of the elevator being broken'away and illustrated in section on the vertical plane A passing through the axes of the roller guide shafts at one's ide of the intermediate memberand'looking in the-direction of the arrows a-a, Fig; 2, and portions of the lower telescopic member of the elevator :being broken away and illustrated in section on the vertical'plane B'p'assing through the axes of the roller guide shafts at one side of thelower telescopic memberand looking in thedi rec tion'of the'arrows Z246, Fig. 2; and 7 section on the horizontal plane, C passing through, the opposite upper roller" guide shafts of the intermediate telescopic member and looking in the direction of the jarrows cc,'Fig. 1, and portions being broken away 2 a fragmentary plan view thereof, portions being broken away and illustratedin and illustrated in Section on the horizontal plane vD passing through theaxes or the oppositeupper roller guide shafts of the lower telescopic member and looking tion of thearrows dd,jFig. 1'. Similar numerals refer to similarpa rt's' throughout the drawings; The dental chair elevatorindicated' generally at 10, includes abase 11, a lower telescopic'member, "12supported by the base, an

intermediate telescopic-niember 13 longitudinally telescoping within the lower member 12,-"and an. upper telescopic member 14 longitudinally telescoping within the inter-j mediate-member 13. v .1

At the upper end of the upper memberrl i,

mu direc'i the seat 15- of a dental chair "may bezsup 3'. r r l. r t

I All of the foregoing members are hollow, and house suitable mechanism not shown, but which may be-thatfillustrat'ed in the prior application for patent offHenry E. Weber,

for dental chair elevators, filedNovember 3, 1928, Serial 316,969, which matured into Patent No. jl,814,8(4,} issued July 14:, 1931 whereby the telescopic members be raisedbybperation of an elevating'pedal lever 16, andmay be lowered of 'ajlowering pedal lever-"17R 'In raising and lowering the i telescopic br w e-e members of the elevator, it is, necessary w prevent rotary movement of the members with respect to each other." i 'One' member of eachpair of thetelescopi has formed therein a horizontal laterally ing members is provided preferably at opposite sides with longitudinally spaced sets of roller members and their adjustable mount ings, each set being illustrated generally at 20, and each set comprising one cooperating instrumentality of the improved roller guide I hereof.

For example, the upper set of roller members and mountings 'on the intermediate member 13, as viewed in Fig. lfwill be described in detail, 'each of' the other sets being of substantially identical construction.

' This set together with the longitudinally spaced lower set at that side of. the inter.-

; mediate member 13 cooperates with a longitudinally extending rail 21 which is pref-V erably a circular rod, removably-secured as by screws 22 in an outer groove formed in the upper telescopic member l4.

d A similar rail 21 is mounted on the upper member 14 opposite the firstmention'ed rail, and similar opposite rails are secured in longitudinally extending grooves onthe out er surface of the intermediate member 13 I Y and cooperate with longitudinally spaced sets of the roller members and adjustable mountings 20 secured in opposite sides of the lower member 12.

Referring to the particular set 20 under consideration, the intermediate member 13 extending bore 23. The bore 23 is threaded at itsj central portion24eand the walls of the member'13 have an inner side opening 25 formed therein, communicating with the inner end of the bore, and into which side opening the rail 21' extends.

he bore 23 is provided with an inner end extension 26 of substantially reduced diameter, and the innerbore extension 26 forms a bearing for one end of. a roller shaft 27 ,The roller shaft 27 extends transversely cross-wise of the rail 21 and its other end is supported in. a bearing bore 28 formed in r a screwplug-29 whichjis adapted to screw in the threaded central portion '24:. of the bore 23., c V I V g At opposite sides of the rail '21 preferably conical rollers 30a and 30?; are rotatably mounted with their apexes adjacent each other and with their conical surfaces rolling against opposite sidesof the rail 21.

- A preferably anti-friction thrust bearing 31a is interposed between the base end 32a of the conical roller 30a and one surface of a thrustdisk 3300 which is seated against the shoulder 34a formed between the inner end tension 26. j I V Similarly a preferably anti-friction thrust of the enlarged bore 23 'andt'he reduced ex bearing 31?) is interposed-between the base end of the screw plug-29.

By screwing the vplug 29 towards -or away I end 326 of-the conicalroller 30b and a' thrust d1sk'y33b which is seated against the inner from the roller members, the distance between their opposite conical surfaces is decreased or increased, and the rollers are arranged to roll longitudinally on the rail with no sliding friction, forming the improved adjustable roller guide hereof.

wear on either the "rail or the rollers may e taken up by suitable adjustment of the screw plug 29.

A set screw 3'5' sc'rewed in a suitable aper ture in the member 13 and'engaging with the screw plug 29 secures the set of roller members in any desired position of adjustment.

"' A 'iille'r p1ug'3 6' may be provided if desired for the outer end of the bore 23."

I claim Y v1. Incornbination, two telescopic members longitudinally movable with respect to each other, a longitudinally extending rail secured onone member, spaced rollers movable with respect to each other andv rotatably mounted on the other member, and means for moving said rollers with respect to each other thereby maintaining opposite faces of the rollers in rolling contact against opposite member and extending transversely of the rail, spaced rollers rotatably and slidably mounted on the shaft and rolling against opposite sides of. the rail, and means for sliding'said rollers onsaid shaft toward each. other. V

In .testimonythat Ilclaim the above, I have hereunto subscribed my name. v

DAVID J. .BINUS.

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