US 2822587 A
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Description (OCR text may contain errors)
Feb. 11, 1958 E. c. HALLocK 2,822,587!
MOUNTING MEANS FOR BLADES FOR LouvERs Filed Feb. 28, 1957 36 FIC-3.3. 30g, FIG2.
l INVENTOR 24 27,/ 22 EDWARD cJ-DNLLOCKl 23 BL- HIS ATTORNEYS Unite MoUNTlNG MEANS Fon BLADES Fon LoUvERs* naw/arde. Harlock, summit, NJ. Applicatiesrbraaryza'wsn senat No. 643,147
n'claims'.' (ci. zal-isz) 1 the frameY of the jalousy. Each of the types of pivot members referred to above has a number of disadvantages.V
They are somewhat diicult and expensive'to manufacture and when they are made as separate elements toibe affixed to the blades or vanes, they are expensive to'attach to the blades and have a tendency -to loosen'during use 'ofthe' louvers of jalousies.
Production of extruded louver blades' has added' to the diiculty of providing a satisfactory pivot structure forthe reason-that the pivots cannot be formed integrally' with theblades and they thus must be formed'separately and thereafter be attached to the louver blades. tions asriveting, welding, bolting or screwing the pivoti members to the ends of the blade are expensiveand time consuming and are not satisfactory, in any event, for assuring the long life and easy maintenance ofthe louver blades, particularly in localities where the blades maybe subjected to relatively heavy stresses exerted for example' by high winds and the like.y
The present invention has to do with an improved pivotl structure for louver blades and to an improved type of operating mechanism including the new pivot structure. The pivot structure includes novel pivot members which are yconstructed and arranged to be used in connection with extruded typesn of louver blades, although they are not-v limitedto such use and can be used with stamped sheet metal or other types of blades.
In general, a louver blade with which the pivot members l are used, has longitudinally extending bosses in parallel relation on one side of the blade, the bosses being provided with'lengthwise extending cavities which Vcommunicate with slots in the opposed faces of the bosses, rendering the'V bosses generally C-shaped in cross-section.
Due-to the fact that the bosses and the cavities and slots Such operaatent therein `are formed by an extruding operation, they cannot be formed within as close tolerances as machined parts:V In order to overcome the disadvantage of the wider varia-A tionsfin size of the bosses, cavities and slots therein, a pivot member is provided which includes a body member having a wide surface adapted to bear against the portionof the louver blade between the bosses and having ribs of slight- 1y tapered formation at its edges to engage in the cavities in the ribs. The tapered shape of the ribs enables them to'be fitted tightly in Ythe ends of the cavities in the blade bo'ssesby driving Vthe pivot member into them and 'thus f Vspringingthe bosses'slightly.` A shaft extends vfrom the fice outer-end of the body portion offthecpivotmember' andthis shaft is formed with agenera-llyf cylindrica'li bearing' portion adjacent to the end Iof l'the' body pd'rtion,^'fa key of non-circular portion for receiving'fan actuating yrriembelj and an outer endportion-which'may be threadedor otherwise formed to receivea-fastening "device suchas alock; nut:
The pivot member'isconstructedand 'arranged s o that it can b e driven-into the-bossesinthe louvr''blade/only'fa" predetermined distance oand its-dimensionsare s ujchthat" despite its use'with anextrudedbladel;ithe'pivotrrember tits sotightly there iscnordangerof 'dislodging' the'pi'vot member from the bosses'nd'the'gerids of 'thelouver'bladef even under the efects- `"ofevibration'inducedfby highfwinds and the* like. j
The arrangement fof thefbearingan'dj'key portions fof chefY shaft'of the pivot member enablesa'conceal'ed type'of actuating mechanisml to be 'conneetedtotthe pivotim'enber" inasmuch as` the operatingfelements "of the'l mechanism may be disposed withinbox-like ja'rnb"rn'erniers'at the" opposite Vends of thev blades of Vthe 'lo r stiiicturef'1 Inasl: much as the operating mechanismN the' jamb or frameworkof'theflo rs,'ex'ceptffor` the; operating crank or other handle`,'"the Mver may be provided with insect screening`whieh`electively covers thef entire opening 'within thet vlolfrve'rfranaeand "thus" gives i superior protection against insects.
For" aV 'better lunderstanding of theirpre reference may be ha'clto the'accompanying-'drawings inY which:
ing louver with parts ioffthe'ifrairiefot theflou disclosed'j seinbly shown in Figuesfl and Figure l;
Figure .5 isa perspectiveviewofa pivot:mei-fiber*aclkv cording to the presen't'finvention'; and
ber' The invention will be described'f and 14 formed in one s ide thereon' One dg of the blade 10 is pro'VidedwithQ a dove ail grooveltf for receiving a rubber gasket strip-IGFwhiclicooper with the flange 11 of the next adjacent louvelrbl e 1 0 14 extend lengthwise of the blade Illl` arredare"respectively/1 I generally C-shaped and reverse'C-shap'ed'in'cro As illustrated, the bosses have convexlyf curved 'outerf surfaces and are provided with generally "cylindrical cavities 13a and 14a extending throughout theirjlengthff in communication with'narrower slotsjllabl and' 'l4b 'also'` -extending throughoutthe lengthsof the bosses. llVliile= the bosses and cavities are shown as 'generally circularim cross-section, it will belunder'sto'od thatthey can takeother` shapes.v The `diameter bf the generally'"cylindrical"` cavitie'slczand 14a is somewhat greaterithaii'the Cross; i
une dispas'ai'fweithinjV 'ht inventioni'f Figure 6 isan end elevational view'ofjthepivot*meriti wilriafin to ai Ventilating type of louver havi ng a 'plura li ty yoffpivotefd swan-e A`fr.
sectional dimension of the slots 13b tions of the slots with the cavities.
Referring now to Figures and 6, a new connecting device and pivot member provided in accordance with the present invention includes a body portion 20 which may be vof generally rectangular cross-section although as shown in Figure 5, it may have a concavely curved leading or inner edge 21. At the lateral edges of the body portion 20 are ribs 22 and 23 which are generally complemental to the shape of the cavities 13a and 14a and, as shown, are generally cylindrical but tapered slightly so that their left hand ends as viewed in Figure 5 are of somewhat greater diameter than the diameter of the cavities 13a and 14a in the bosses 13 and 14.
A reinforcing web 24 extends across the rear edge of the body member 20 generally perpendicular thereto from one rib 22 to the other rib 23 and is of generally wedge-shaped configuration as viewed from the end. The web is extended forward in the form of thickened portions 25 and 26 adjacent to the ribs 22 land 23, these thickened portions conforming generally to the shapes of the slots 13b and 14b in the bosses and being adapted to tit tightly therein. Extending outwardly from the rear edge of the body member 20 and supported at least partially by the reinforcing web 24 is a pivot shaft 27 which is integral with the body portion, and is provided with a generally cylindrical bearing portion 27a, a squared or non-circular key portion 27b and with squared cast threads 27e adapted to receive a lock nut such as a nut provided with a friction lock washer or plug of known type. As best shown in Figure 6, the bearing portion 27a is of such diameter that it extends beyond the generally flat back side 20a of the body portion 20 and its lower edge therefore forms a stop to limit the extent to which the pivot member 19 can be "driven into the bosses 13 and 14 on the blade. The pivot member 19 can be a one piece casting of a suitable casting metal, such as the casting metal known as Zamac (a zinc base casting alloy containing aluminum and magnesium) sold by the New Jersey Zinc Company. Due to the tapered shape of the ribs 22 and 23 and thickened portions 25 and 26, a very tight drive fit is obtained between the pivot member 19 and the bosses 13 and 14. Moreover, due to the distribution of forces along the lower dat surface 20a of the body member and through the spaced apart ribs 22 and 23 which form spaced fulcra, a very strong and shakeproof connection is obtained between the pivot member 19 and blade 10.
As shown in Figures l and 2, pivot members 19 at and 141: at the juncopposite ends of the blades support the blades in the side members or jambs 30 of the louver frame. The jambs 30 may be of generally box-like structure having side anges 31 and 32-and a cross partition 33 which is provided with a series of openings 34 along its length to receive bushings 35 formed of Nylon or the like in which the bearing portions 27a of the pivot members are received rotatably.Y While the bushings 35 can be omitted, they reduce wear on the operating parts and also reduce rattling which might occur with metal to metal contact.
Inasmuch as the squared or key portion 27b of the shaft is disposed within the jamb 30 and on the opposite side of the partition 33 from the louver blade 10, the blade-actuating member'or lever 37 which is `mounted on the squared portion 27b is disposed inside of the hollow jamb 30. It will be understood that each of the blades of the louver is provided with an actuating lever 37 and all of these levers may be connected by means of a vertically extending link 38 or by a series of such links so that the louvers move simultaneously from the open position shown in full lines in Figure 4 to the closed position shown in dotted lines in Figure 4. Any. suitable actuating means for moving the link 38 maybe provided such as, for example, a worm and sector actuator of conventional type which may be mounted on the side 32 or 31 of the box-like jamb and thus is readily accessible from within the building in which the louver is mounted. Inasmuch as the operating mechanism for the louver blades does not extend through the space in which the louvers operate, one entire side of the frame in which the louvers is mounted can be covered with screening 40, thereby eifectively preventing entry of insects.
It will be understood that the louver blades will have pivot members 19'at their opposite ends but that in most instances the actuating lever 37 and link 38 system is provided at only one end of the blades. The pivot member 19 at the opposite end of the blade from the end having the lever 37 thereon can be provided with a washer or similar element on the squared or keyed portion 27b of the shaft, the washer being secured by means of a lock nut on the end of the shaft. Such an arrangement prevents disengagement of the blades from the framework when the frames are twisted or wracked as sometimes Vis the case during installation and assembly and actually increases the resistance of the frame to distortion bypreventing bowing of the jambs at the sides of the frame.
It willbe understood from the foregoing that the pivot members described above are easily assembled with extruded or otherwise formed louver blades thereby avoiding the expensive and time-consuming operations required heretofore in Yassembling pivots on louver blades. Moreover, the pivot members can be assembled with long or short or wide or narrow blades without modification.
It will be understood that the pivot members may be made in different sizes and shapes and of different and varied types of materials depending upon requirements. Accordingly, the form of the invention described herein should be considered illustrative and not as limiting the scope of the following claims.
l. A pivot member for louver blades comprising a plate member having substantially semi-cylindrical ribs at two opposite edges thereof, a stiffening web substantially perpendicular to said plate at one end thereof and united with said plate and an end of each of said ribs,
' a shaft fixed at one end to said web and extending substantially parallel with said ribs, said shaft having a cylindrical bearing portion adjacent to said web, a noncircular portion adjacent to said bearing portion adapted to receive an actuating member and a threaded portion to receive a fastening device.
2. A pivot member for louver blades comprising a plate member having a pair of ribs at opposite edge portions thereof, a shaft integral with said member and extending from one end thereof substantially parallel with said ribs, said shaft having a cylindrical bearing portion adjacent to said one end of said plate member, a non-circular portion adjacent to said bearing portion to receive an' actuating member, and another portion adjacent to said non-circular portion to receive a fastening device. l
3. The pivot member set forth in claim 2 in which said bearing portion projects laterally beyond at least one face of said plate member to form a stop.
4. The pivot member set forth in claim 2 in which the portion of the shaft for receiving a fastening device has cast threads thereon.
`5. The pivot member set forth in claim 2 in which said plate has a reinforcing web integral therewith extending from one of said ribs to the other at said one end of said plate, said shaft being joined to and at least partially supported by said web.
6. A movable louver blade for a louver unit, comprisingV an elongated, thin metal strip having a pair of substantially parallel bosses on one side of said strip and extending lengthwise thereof each of said bosses having a slot in its side facing toward the other boss and an internal cavity communicating with said slot, said 5 cavity being of approximately circular cross-section and wider than said slot, pivot members at opposite ends of said blade, each pivot member having a body portion bearing against said one side of said blade extending into said slots, ribs on the edges of said body portion engaging in said cavities with a drive fit, and a shaft extending outwardly from said body portion beyond the end of said blade, said shaft having a substantially cylindrical bearing portion adjacent to said body portion, a non-circularl portion adjacent to said body portion and an outer end portion for receiving a fastening device.
7. The louver blade set forth in claim 6 in which each pivot member comprises a reinforcing web on said body portion extending transversely thereof from one rib to another, said shaft being joined to and at least partially supported by said web.
8. The louver blade set forth in claim 6 in which the bearing portion of said shaft extends outwardly beyond said body portion and engages the end of the strip to limit inward movement of said pivot member relative to said strip.
9. The louver blade set forth in claim 6 in which the outer end portion of said shaft is of substantially square cross-section and has cast threads thereon.
l0, The louver blade set forth in rclaim 6 in which the body portion of each pivot member has portions adjacent to said ribs engaging in and substantially complemental to the cross-section of said slots.
l1. A Ventilating louver comprising a plurality of louver blades of the kind set forth in claim 6, a frame having side pieces, bearings in said side pieces receiving the bearing portions of said pivot members rotatably, levers mounted on the non-circular portions of the shafts of the pivot members at one end of said blades and retained thereon by said fastening devices and means connecting said levers for simultaneous movement to rotate said blades relative to said frame.
No references cited.