US1769723A

US1769723A - Sash-operating mechanism

Info

Publication number: US1769723A
Application number: US75331A
Authority: US
Inventors: Edwin W Terhune
Original assignee: Lord & Burnham Co
Current assignee: Lord & Burnham Co
Priority date: 1925-12-14
Filing date: 1925-12-14
Publication date: 1930-07-01
Anticipated expiration: 1947-07-01

Description

July 1', 1981);

E. W. TERHUNE SASH OPERATING MECHANISM Filed Dec. 14, 1925 //v vE/v TUR' E0 /w/v VV. TERHIUNE B Yl, w

,47' TUR/V5' Y Pstented July 1,V 1939 sie? rest

EDVJ'IN W. TERHUNE, GF IRVIETGTON GN 'TE-IE EUDSON, NEW YORK, ASSIGNOB T0 LORD 8a .BUBNEA CGfIPANY, OF IR'VENGTON ON THE I-UDSON, NEXV YORK, .A

SASZL-GPEATING IJEGHANESM Application filed December This invention relates to sash actuating ineeh'enisin, end relstes particulzii'ly to inechanisni for controlling the nioveinent end position of coinparetively heavy seshes 8 hing'ed or hung from the top, such ss are used in industrial structures or greenhouses, but it is understood thatl the invention'is not limited thereto, but may be edapted to other sti'uctures end types of sesh support.

Various types of sash Operating niechanisin have heretofore been used. rlfliese inclu by worm and gear, and the rack and pinion type also a-ctuated by wenn and gear. l'llfhile ;15 these types vare Well suited for certain conditions, they have certain liinita-tions. llfhen the forinci' type is used for opereting cornpai'atively heavy sash to obtain substtniiol sash openings, the torsion on the shaft becoines excessive; this'is particularly noticeable if the run of sash is of considerable length. Further, the Vsash is net held ri'gidly. n the rack and pinion type, heretofore usechwhcre one end of the rack bar is directly pivotally connected to the sesh.r it has required the rack bar used to he of e length et least as great es the opening required at the szish. TWhere the sash opening is large, this Asens that when the sssh is closed, the end of ne rock bar extends within the building structure for'a. considera-ble distance. is objectionable, perticulerly in structures where it is desired' to place or store articles or"objectsl'ediscent to the wall or sssh. A further cheracteristic feture of the rock end pinion type'of apperatus es hei'etofore used, is that it is necessary'to make a colnperatively large number of turns'of the line shnft on which the pinions are inounted, to effect a eorrespoiiding nia-Ximuin opening of the sash. rhis consumes time and results in Comparetively slow operation of the sash.

En the types of apparetu's referred to, a where the nia-in parts of the sctuatin; niechanisin, such ss the worm end gear and the rack and pinion, hevebeen provided to meet given conditions,. the spparatus is not readily adapted tobe edjusted or changed to incet var-*Ting conditions of 'use requiring different le the arin and rocker shaft type actuated This ieiee. 'serial ne. 75,381.

varying runs, and in.

eting inechanisin of the rack end pinion type,-

a means for obtaining'e maximum lnovenient of the sssh to be effe'eted with a minimum or more restricted niovenient of the rack bar' A further object is to provide in sesh actueting devices of the rack and pinion type, a Ines-ns such ss a series of links or the like, interposed between the rack bar and the sssh, whereby the relative. movenient of the sash end rack bar end the relative force effective through the bei' to open the sesh to the different positions, may e reedily changed or adjusted by varying the relative i length and points of pivotsl connection of an srln loi' linkegje inechanism, through which the movenient of the rack bar is transmittedto control the inoveinent end position of the sush.

Still a fui'thcr object is to provide sash persting inechanisno of the type above recrred to, Whereinthe sash Vis rigidly and ositivel'j.7 held, end lneintained in closed sie O oosition by a direct inward thrust substanis y norm-ul to the sash. A further object is to provide sesh oper- :iting' inechzinism vwhei'ein the actuating inechanisni is so disposed and erra-nged, when the sa'sh is closed, as to permit storage or plecin; of articles or objects in the space near or edjzicent to the'line shaft 01' the Vactuating niechenism, without having the rack bar in- 'ci'fei'e with the articles there placedj Inteud of projecting substantially inward from he inside face of the building wall or the sesh, tlie'i'ack bar is projected upwerd and outward. I I

Otiei obiects end sdventages will' be ep- .izii'ev t froin the followingdescription.` For soses of illusti'ation, onepreferred form the in'zfentionV is shown in the a-ccompe-nying drswings tnd Vdescribed in the following specification.V

i Figure l en elevation Vof a sectlonof a p, of importance sash, showing the relative arrangement of the sash and actuating niechanism.

F igure 2 is a side elevation of Fig. 1, and shows in addition, the worin and gear and 5 means for Operating the same from below.

Figura 3 is` a diagram showing a modified form in which the rack bar is under tension when the sash is opened, instead of being under compression as shown in Fig. 1. A shown in the selected embodinient t'hosen for the purpose of illustrating one referred form of the invention, a sash 10 is 'nged or suspended from the top by a suitable hinge connection 11, 12, so as to perinit the sash to swing outward and upward.

H `suitable means are provided for controlling and eifectin movement of the sash from below. A line s aft 19' is rotated b. means of I worm 26 and gear 25, fixed on t e shaft Q 19'. i `The worm and gear is shown within the easing 24, supported on a post 30. The worm ia mtated by a chain 28, and sprocket mechaniflm 29, 31. The sprocket 31 is mounted on the worm Shaft 27, and sprocket 29 is mounted on the post 30, and may be turned by the handle 32. The worm and gear serves as a op`` or brake to hold the sash in any given position at all times.

The mechanism, capable of adjustment to a different relative positions, for directly actuating .the sash 10, includes a rack bar 18, and pinion 19, and a series of links or arms 14, 15, mterposed between the rack bar 18 and the md! 1 0. The rack and pinion ty e of sash otultxng device is articularly we l adopted for long runsof sas because of the relativelly small tdrsion produced on the line shaft for'anyone sash. The pinions 19 are vfixed o n the line sli'aft 19', at oints where it is deu dn'odto actuate the sas A rack bar 18 is hold m enggement with the pinion 19 by a -wtable cra 21, having roller's 22 engaging the outer edge of the bar 18.

Thearm or link 14 is shown pivoted at one R end 13 an a bracket 13 fixed to the sash frame brother static'mary support. The link 14 is pivotally connected at another point 17 to a `aoocmd link 15, which link is in turn also pivotay connected to the sash 10 through a suitable means such as a bracket 16'.

' the'preferred form mdoitho rack' bar 18 is pivotally connected to the link 14 at a point intermediateits ends, dan sucha position relative to the pinion I! 19,011 the shaft 19' that when the sash is elosedhthe. rack bar 18 extends lupward and out'ward, instead of directly inward of the trnctureas it would if it were directly connoted at one end to the sash. This feature when this mechanism is to bo 'used in industrial buildin gsorother st'itnctures Where space adjacent or near to the unter walls is valuable for storage or other purposes.

A' fiirtlier feature of importaric and of shown in Fig. 1 one great advantage, obtained by interposing a series of arms or links between the rack ar and the sash, is, that it enables the travel of, and the force transmitted through, the rack bar, to be varied or adj usted so as to be either greater or less than that of the sash, by changing the relative lengths and points of pivotal connections of the links and the rack bar. This is a com aratively minor change, and may be made by using the other main parts of the apparatus. To the best of my knowled e, this has been impossible in prior installations of the rack and pinion type, where one end of the rack bar is directly connected to the sash.

As shownV in Figura 1, when the sash 10 is closed, the link 15 isA substantially normal to the sash, thus resulting in a straight inward thrust wliicli is positively effective to hold the sash rigidly and firmly iii closed position.

A modified form of the apparatus is shown in Fig. 3. The arm or link 14 is extended at an angle beyond the pivotal point 13' to include the arm 14'. forming a bell crank efl'ect. The rack bar 18' is connected to the arm 14' at 23. As sliown in Fig. 3, the point of coniiection 23with the rack is at a greater distance from the point 13' than the corres onding pointpQO is as shown in Fig. 1. As s own in Fig. 3 the rack bar 18' will be under tension when the sasli is open, and will thus not be subject to any buckling strains, and the distance betwecii the end of the link 14' and the pinion will be a minimum. By such an arrangement, at the point of greatest load or Stress, that is when the sash is opened or raised, the greater portion of the rack bar is subject to no strains whatever. Fig. 1 the rack bar is under compressive strains wlien the sash is raised. The arrangement of the rack bar as shown in Figure 3, also permits the rack bar to be dra'wn upward and outward when the sash is closed, thus preserving the adjacent space for storage or other purposes. The modified form shown in Fig. 3 wherein the rack bar is made a tension member, clearly illustrates the flex' ibility and importance of this invention in meeting different conditions and requirements. As heretofore used in raising sash, the rack bar has been a compression member.

While certain pi'eferred forms of the invention have been shown and described, it is understood that various changes and modifications may be made by those skilled in the art, without departing from the spirit and scope of the invention.

lVhat I claim is 1.. In sash actuating mechanism, the combination of a horizoiital line shaft, a sash pivotally mounted on a horizontal axis, a pinion on said line shaft. a rack bar actuated by' said pinion and a plurality of links inter-l posed between the rackbar and sash, one of said links being pivoted at,V a fixed point,

ioo

As shown in and a connection between the rack bar and said last named link, whereby a direct inward thrust through one of the links substantially normal to the sash is exerted through the pinion ,and rack bar to hold the sash firmly closed, and permitting substantially the entire.

rack bar to assume a position within the space above the line shaft and between said sha-ft and the sash frame, when the sash is closed.

2. In sash actuating mechanisrn, the combination of a line shaft parallel to the aXis of rotation of the sash, a sash pivotally mounted, a pinion on said shaft, a rack bar actuated by said pinion, a compound link connection between said sash and the sash frame, said rack bar being connected with one of the links, the relative'arrangernent being such that the link connected to thesash is substantially normal to the sash when opened and closed, and such that the rack bar is above the line shaft and substantially parallel to the sash when closed.

8. In worm and gear actuated sash operating devices, the combination of a. line shaft, a Worm and gear for actnatin'g said shaft, a sash pivotally monnted to rotate about an axis parallel with the shaft, a. pinion on said shaft, a rack bar actuated by said pinion, a stationary support, a series of links connectel between the sash and the support, the end of one of the end links being pivotally convnected to the sash, and arranged to transmit the force from the pinion through the rack bar so as to eXert a direct inward thrust to hold the sash tightly closed, and the end of the other end link being pivotally connected to the stationary support, said rack bar being pi-votally connected to the link connected to the stationary support, whereby a limited movement of the rack bar will effect a relatively large sash opening, and whereby said worm and gear function as an automatic lock to hold'the sash in any other position.

4-. In sash Operating devices of the rack bar and pinion type, in combination, a stationary support arranged between the top and bottom of the sash frame, a series of links connected between the sash and the stationary support, the link connection to the sash being arranged to cxert a direct inward thrust substantially normal to the sashwhen closed, and a connection between the rack bar and the end link connected to the stationary support, said last named connection being so placed relative to the pinion that the rack bar extendsupward in a substantially Vertical position when the sash is closed.

5. In sash Operating mechanism of the rack and pinion type, the combination of a stationary supporha sash, a plurality of links connected between the sash and the stationary support, a connection between the rack bar and the link connected to the stationary support, the relative arrangement of the links and rack bar being such that when the sash is in closed position, a substantially direct inWard force normal to the sash is effective through the link connected to the sash to hold the sash firmly in closed position.

In testiinony whereof I afiix my signature.

EDIN VV. TERHUNE.