US 2819628 A
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Description (OCR text may contain errors)
Jan. 14, 1958 R. WARDLAW`r- 2,819,528
DOOR CONTROL DEVICE Filed Aug. 16, 1954 2 Sheets-Sheet l Jan. 14, 1958 R. wARDLAw 2,819,628
DOOR CONTROL DEVICE Filed Aug. 1e, 1954 2 sheets-Sheet 2 Il IIII IIIHIU I INVENTOR.
fQuse/ Ward/aw v x f BY HTTORNE V5 United States Patent() DOR CNTROL DEVICE Russell Wardlaw, Mill Valleyfalif., assignor to Coolsson Company,` San Francisco, Calif., a partnership Application August I6; 1954, Serial'No; 450525 Claims". (Gl'..74--625) This invention relates generally to rolling doors and more particularly to devices for operating rolling doors.
KIn the past, rollingl doors have been provided' with power operated: means for closing andl opening the same, but often no provision has been made for opening and closing the doors in the event of power failure or motor trouble. Devices which have madeprovisions for such contingency have in gener-al been rather elaboratel and expensive.
In general, itis an object of the present' invention to provide a power` operated door control mechanism which can be operated by hand in the event of power failure or motor trouble..
A further object of the invention is to providea device of the4 above character in which power operated means and hand operated4 means are provided for door control.
A further object: of the invention is to provide a de vice of the above character in which the motor may be removed without .interfering with the hand operated means.
Another object of the invention is to provide `a device of the above character in which the power operated means is. disconnected during operation of the hand operated means. t
Additional objects. of the invention will appear from the following description in which the preferred embodiment of the invention has been set` forth in detail in conjunction with the accompanying drawing.
Referring to the` drawing:
Figure l. is a side elevational view illustra-ting the door control device incorporating the present invention.
Figure 2 is. afront elevationalview of the door control device shown in `Figure I.
Figure 3 isa partial side elevational View of my device on the side opposite that'shown in Figure l.
Figure 4 is a cross-sectional view taken along the line 4--4 ofFigure` l.
In accordance with the present invention, l employ power operated means associated with reduction gearing for operating` a rolling door and hand operated means associated with the same reduction gearing for operating the same rolling door in the event of power failure, motor trouble and the like. The `hand operated means is so connected to` the motor operated means that when the hand oper-ated means is being usedfor opening or closing the rolling door, themotor operated means is disconnected and` cannot be energized.
The embodiment of my door control device shown in the drawing `consists of an angular support bracket 11 which serves asa mounting for the rolling door l2, the power operated mechanism 13 for controlling the rolling 2,319,628 Patented Jan. `14, 1958 ICC door, and the hand" chain' mechanism 14 for also controlling the door. The angular brackets 1I are mounted on thewall 1:6 on the opposite sidesof the opening formed bydoor jambs 1`7 and near the lintel level 1S' so that the rolling door can be raised above the lintel level. Mounting can be `accomplished by any suitable means such as by fastening the bracket' 1l to the wall angles 19 by means of bolts 2l. The wall anglecan'be fastened to-the wall plate 22 by any suitable means such as light screws or bolts.
The rolling door 12 may be of conventional construction wherein a main shaft' 24 is suitably journalled in the brackets 11, and a barrely 26isiixed` to theshaft 24 and is coaxially aligned with the same. A curtain 27 formed of interlocking slats fabricated from a suitable material such as cold" rolled strip steel isadapted to be Wound upon the barrel 26 as the maint shaft 21%' is turned in a counterclockwisel direction as viewed in Figure l. The sides of the curtain Z7 are adapted: to run in curtain guides 28 which may be fastened; to the wall angles i9" by any suitable means such as bolts. The tops of the guides are Well flared at 23 -t'o' facilitate entry of the curtain; The entire curtain barrel assembly is covered by a hood 32 whichI can bev fabricated from sheet steel and attached to the brackets by means of" bolts or screws (not shown).
The main shaft 24Ei is adapted to be rotated by either the power' operated' mechanism 13 or the hand chain mechanism 14 as' hereinafter described.
The hand-chain operated mechanism lli consistsV of a hand chain loop3`6 which hasl one end looped about and engaging the teeth on the chain sprocket 37'. The chain should be of sufficient length so that it can be reached with easeby aperson standing on the floor near the door. The sprocket 37 is mounted on and coaxially aligned with respect toa` projecting flange 358 on pinion 39 and is fixed thereto by means of key 4l. The pinion 39l is journalled on a shaft 4211 Shaft l2 Vis provided with a collar 43V which is mounted in the bracket 1l and one end of reinforcing member fri/l in such a manner as to prevent rotation of the shaft 42. The reinforcing member can be attached to bracket lil by any suitable means such as welding.
A shaft 47 having a` collar is mounted in the other end ofthe reinforcing member i4 and bracket il so as to prevent rotation of the shaft d'1'. A pinion 49 is journalled on shaft 47 and has a projecting flange S1 which isi coaXiallyaligned with chain sprocket 52 and serves to mount the same. The chain sprocket 52 is fixed to the `flange 51 by means of key 53 and pin 5d serves to prevent the sprocket 52 and pinion ai@ from slipping off ofthe shaft 47'.
Intermediate the pinions- 39 and 49, l have provided spur gear 56 which is adapted to be moved into meshing engagement with either of the pinions 39 or 49 by means of a Scotch yoke mechanism 5'7". The spur gear 56 is journalled on an eccentric shaft 58 which is rotatably mounted in the bracket 11 and the reinforcingmember 44 whereby upon rotation of shaft 5'8 spur gear 56 will be moved into engagement with either pinion 39 or pinion 49. The other end of the shaft 5S is provided with a cam member 59 which is fixed to shaft lliby suitable means such as key 61. The* cam member 5'9`is provided with a projecting pin 62" which is mounted offn center and which forms a portion of the Scotch yoke mechanifsrnS?. The Scotch yoke rnechanismfconsists of afyoke member 63 provided with a slot 64 which engages pin 62. The yoke member 63 is fixed to an operating rod 66 by suitable means such as a set screw 67. The operating rod 66 is limited to vertical motion by means of the brackets 68. The operating rod 66 should be of such a length so that it can be easily reached by a person standing on the door near the door. Additional means may be provided for fixing the vertical position of the rod in any one of two predetermined vertical positions for a purpose hereinafter described.
The cam member 59 is provided with a projecting lug 69 which is adapted to engage the operating member 71 of a normally open microswitch 72 when the operating rod 66 is in its lowermost predetermined position for a purpose hereinafter described.
A chain guard 73 is provided for preventing the hand chain 36 from jumping off of the sprocket wheel 37 and may be attached to the bracket 11 by suitable means such as bolts '74. The guard 73 also serves to prevent the pinion 39 and the sprocket wheel 37 from slipping off of the shaft 42.
Additional reduction gearing may -be utilized for driving the main shaft 24 `from the sprocket wheel 37, the amount of reduction gearing being dependent upon the weight of the curtain 27. In this instance I have provided a gear 76 which is adapted to mesh with the spur gear 56 and which is journalled on a shaft 77 attached to bracket 11 by means of a mounting 78. A pinion 79 is coaXially aligned with and -is mounted on the projecting flange 81 of gear 76 and is fixed thereto by means of key 82. Pin 83 serves to prevent gear 76 and pinion 79 from slipping off of shaft 77. Pinion 79 meshes with a gear 84 which is fixed to main shaft 24 by means of key 86.
The power operated mechanism 13 consists of a gearmotor 91. which is mounted upon the bracket 11 by suitable means such as bolts 92. A chain sprocket 93 is keyed to the output shaft 94 of the gearmotor 91 by means of key 96. Chain sprocket 93 is connected to the chain sprocket S2 by means of roller chain 97.
A cam operated limit switch 98 is associated with the gear 84 and is mounted on the hood 32 -for a purpose hereinafter described. Its operating shaft 99 is fastened to a gear 101 by means of pin 102 and gear 101 is meshed with gear 84.
Operation of the door control device may be briefly described as follows: Let it be assumed that the spur gear 56 is in the position shown in Figure l where it is shown to be in engagement with pinion 39. In this position, the curtain 27 is adapted to -be raised or lowered by means of hand chain 36. Assuming that the curtain 27 is in a lowered position and it is desired to raise the same, the chain 36 is pulled in such a manner that the sprocket 37 is rotated in a clockwise direction. Rotation of the sprocket 37 in a clockwise direction rotates pinion 39 in a clockwise direction which in turn causes spur gear 56 to rotate in a counterclockwise direction. Rotation of the spur gear 56 in a counterclockwise direction causes clockwise rotation of gear 76 and pinion 79. Clockwise rotation of pinion 79 causes counterclockwise rotation of gear 84 which causes the curtain 27 to be rolled upon the barrel 26. Rotation of the sprocket wheel 37 is continued until the curtain is raised to the proper height. The curtain 27 can be lowered by pulling the chain 36 in an opposite direction.
It will be noted that when the yoke member 63 is in its uppermost position, as shown in Figure 3, that the projecting lug 69 is not in contact with the operating member 71 of the normally open microswitch 72. The microswitch 72 is connected into the circuit for energizing the gearmotor 91 and hence until the microswitch is closed by operation of projecting lug 69, the gearmotor 91 cannot be energized. Thus, when the cam member 59 is in the position shown in Figure 3, the gearmotor cannot be .,energized.
1f it desired to raise or lower curtain Z7 by power operated means, it is merely necessary to pull the operating rod 66 to its lowermost position which operation serves to urge the yoke 63 downwardly which causes counterclockwise rotation of the cam member 59 and the eccentric shaft 58, as viewed from Figure l, to cause the spur gear 56 to move into engagement with pinion 49 and out of engagement with pinion 39. At the same time projecting lug 69 is moved towards the operating member 71 which is operated to close microswitch 72.
The curtain 27 can now be raised and lowered by energizing the gearmotor 91 by means of a suitably located starter (not shown). Assuming that the curtain is in its lowermost position and it is desired to raise the same, the gearmotor 91 is energized so it will rotate in a forward or clockwise direction causing the sprocket wheel 52 and the pinion 49 to rotate in a clockwise direction. Clockwise rotation of pinion 49 causes counterclockwise rotation of spur gear 56. Counterclockwise rotation of spur gear 56 causes clockwise rotation of gear 76 and pinion 79 which in turn causes counterclockwise rotation of gear 84. Counterclockwise rotation of gear 84 serves to roll the curtain 27 upon the barrel 26.
Raising and lowering of the curtain 27 is automatically stopped when the curtain 27 has been raised to its uppermost position or lowered to its lowermost position by limit switch 98 which de-energizes the gearmotor 91. The limit switch 98 is provided with a pair of contacts which are connected into the gearmotor circuit. They are opened by cams (not shown) when the curtain has reached its uppermost position and also when it has reached its lowermost position. The cams 4are connected to operating shaft 99 and thus are positioned by movement of the gear 84.
When it is desired to lower the curtain, it is merely necessary to reverse the direction of rotation of the gearmost 91 by means of the starter (not shown).
Normally, the curtain 27 would be controlled by the power operated mechanism 13 and the hand chain mechanism 1.4 would be used only for emergency operation. In this manner, it is still possible to operate the curtain in the event of power failure or motor trouble.
It will be apparent from the foregoing that I have provided a door control device with power operated means which can be manually operated in the event power operated means fails.
l. In a device for raising and lowering a rolling door of the type wherein the door includes a curtain adapted to be rolled about a main horizontal shaft, the device comprising a bracket, a gear train consisting of three gears lying in a single plane and mounted on said bracket, hand operated means associated with the rst of said gears for rotating the first of said gears, motor operated means associated with the second of said gears for rotating the second of said gears, means for moving the third of said gears in said plane and into engagement with either of said first or second gears, and reduction gearing adapted to connect said third gear to said main shaft, said reduction gearing being in continuous engagement with said third gear.
2. A device as in claim 1 wherein said means `for moving the third gear includes an eccentric mounting for said third gear.
3. In a device yfor raising and lowering a rolling door of the type wherein the door includes a curtain adapted to be rolled about a main shaft, the device comprising a bracket, a gear train mounted upon said bracket, said gear train consisting of a pair of stub shafts mounted on said bracket, a first gear journalled on one of said stub shafts, a second gear journalled on the other of said stub shafts, a third shaft journalled in said bracket, one portion of said shaft being eccentric to the remainder of said shaft, a third gear rotatably mounted on the eccentric portion of said third shaft, hand operated means associated with the first of said gears :for rotating the first of said gears, motor operated means associated with the second of said gears for rotating the second of said gears, and means for rotating said third shaft to move said third gear into engagement with either of said rst or second gears, and reduction gearing continuously engaging said third gear and adapted to connect said third gear to said main shaft.
4. A device as in claim 3 wherein said means for rotating said third sha-ft includes Scotch-yoke means consisting of a cam member xed to said third shaft, a pin mounted off center on said cam member, a yoke engaging said pin, and means for vertically reciprocating said yoke.
5. A device as in claim 4 together with means for pre- 6 venting operation of said motor operated means when said gear is in engagement with said first gear, said means comprising a switch adapted to be operated by said cam member.
References Cited in the le of this patent UNITED STATES PATENTS 1,028,532 Boland June 4, 1912 1,441,229 Lacey Jan. 9, 1923 1,649,797 Winn Nov. 15, 1927 2,110,231 McCloud Mar. 8, 1938 2,390,117 Michelman Dec. 4, 1945 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTTON Patent Nm 2,819,628 y January i4, 1.958
Russell Werdlaw It is hereby Certified. that error appears in the above numbered patent requiring oorreoiion and that the said. Letters Patent should read as eorreoined below.,
In 'the grani@y linee and l2y end in the heading to the printed specifil cation, linee and, 4, name of assignee3 for "Cooleson Company", each occurrence reed m Gookeon Company Signed and Sealed this Qnd day of April 1958.,
KARL EL AXLTNE ROBERT C. WATSON Attesting Officer Commissioner of Patents