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Publication numberUS1216202 A
Publication typeGrant
Publication dateFeb 13, 1917
Filing dateFeb 5, 1915
Priority dateFeb 5, 1915
Publication numberUS 1216202 A, US 1216202A, US-A-1216202, US1216202 A, US1216202A
InventorsFred W Boughton
Original AssigneeFred W Boughton
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Slide-up turnover door.
US 1216202 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)



'111,21 6.,@- d y Patented Feb. 13,1917.



Patented Feb. 13, 1917.

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Lemeee tracks,




Specification of -Letters Patent Patented Feb. 13,

lApplication filed. February 5, 1915. Serial Ne. 6,341.

To all whom it. may concern:

Be it kno-wn that l, FRED tlf. Boneirron, a citizen of the United States, and a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful mprovements in Slide Up rlurnover Doors, of which the following is a specification. v

This invention relates to that class of doors, known as'slideeup and turn-over doors, which are opened by raising and closed by lowering, vand to the means employed in their operation; and its. object is to provide a self-counterbalancing door that is of simple construction ,of few L) small space; close fitting;

a door that can operated without the use of overhead links, or other rigid supports, other than the door frame; a door that in its closed position is out of the way and the least exposed to injury a door furnished with simple` self-closing means and self locking means; a doorthat can be easily operated either from the front, or from the rear; and a door that can be equipped with raising means normally inoperative, but. rendered operative by engagement with a' cam carj ried` by an elevator, or' by other desired means. j

rlhe invention isillustrated by the accom* j panying drawings, in which the door in its raised position;

Figure 1 is afront elevation of the door;

Fig. 2 is a section-.on line 2 2 Fig. 1; Fig. 3 is a section on line 3-3 Fig. 1; Fig, 4 isa. section on line 4w4 Fig. 1; Fig. 5 isa section on line 5-5Fig- 1; Fig. 6 is a view similar to Fig. 3 showing Fig. 7 is a section on line 7 7 Fig. 1; Fig. 8 is a section on line 8 8 Fig. 7 Fig. 9 is a view similar to Fig. `7 showing one phase of the invention in its simplest form.

rlhe door 1, adapted to fit into the v frame 2, is furnished at its lower corners with forwardly projected lugs 3, wherein are journaled laterally projected wheels 4 adapted to travel up and ldown tracks 5, provided by the frame, and to be guided and confined in their lowermost lugs 6.

rlhe door is raised and lowered by means of two oppositely disposed cables 7, one end of which is attached to forwardly projected lugs 8 on the ipper corners of the door and the other end of which is attached to forpositionby the vertical floor wardly and laterally projected lugs 9 near parts; disposable in.

vis also furnished above laterally projected hooks 37, adapted tov These cables 7, intermewind, each upon itself, grooved spools 10, 10fL fixedly mounted` on shaft 11 journaled in brackets 12, 12a projected from` the wall 13 and ceiling 14; said shaft 11 being furnished with gear 15 adapted to engage pinion 1G carried by sprocket wheel 17 lixedly mounted on shaft 18 slidingly journaled in-bracket 12 and adapted to be engaged and driven by (but normally out of engagement with) the endless chain 19 running over idlers 20, disposed above and below the door; said chain 19 being adapted to be engaged rearwardly by and travel over idlers 21 journaled on the upper and lower sides of the plunger 22, which extends rearwardly' through the wall 13 and has its forwardend slotted to slidingly engage shafts 11 and 18 and vertically forked to straddle the sprocket wheel 17 its lower corners. diate their ends, around the double whereby, by the forward movement of said and upon which it winds upon itself, saidv spool being fiXedly mounted on shaft 11.

rlhe pinion 16 is held in engagement with gear'l by yoke 30 centrally'and oscillatingly mounted onl shaft 11 and straddling said pinion `16 and spool 10 and having its arms forwardly slotted at 3,1 to engage the sliding shaft 18and draw it with pinion 16 rearwardly bringing the latter into engagement with gear land to maintain such engagement; the rearward end of said yoke 30 beinofconnected by wire 32'with weight 33, whic -is held suspended by a. second wire 34 connected with and adapted to be parted by the fusible link 35. Y

rlhe door -1 is centrally and forwardly furnished with the manually operated double throw gravity latch 36, whereby it is automatically locked inclosing. The door engage the cables 7, asthe door is ape proaching its .closed position, and keep them behind the latch, as shown in Fig. 3. rll`he diameters of the cables and widths of the grooves of the spools are so proportioned asto permit the cables to readily wind the `latch with,

SSD 1,216,902

upon themselves in the grooves and to read ily unwind. The cables 7 are, each, preferably of one piece extending, when the door is in its lowered position, as shown in Figs. l and 3, from the bottom of the door to the rear of'hook 37, thence to the bottom of the non-slidable; chain 19 engaging sprocket wheel 17.

. rllie operation 1s as follows: The door be ing closed and locked, as shown 1n Fig. l,

vthe operator. unlatches it and pulls its upper part forward; he then pulls upon the endless chain 19 and, assisted by the counterweight Q6, raises the door to its overhead position, in lwhich position the lower end of the door engages the top of the frame 2,

while the door in being raised continually extends forwardly and upwardly being held in this position by the cables as they wind upon the outer grooves'and unwind from the inner grooves of the spools 10, 10a. rlhe `door is lowered by simply reversing the pull upon the chain;the door automatically closing and being automatically locked by latch 36.

rlhe plunger attachment, adapted to control the engagement of chain 19 and sprocket wheel 17 as described, is designed particularly for use with doors leading into elevator wells; the plunger serving, when actuated by cam Q-'l carried by car 25, to

'bring the sprocket chain into engagement with the sprocket wheel.

A seriesY of doors leading into an elevator well from different floors could thus be successively controlled by a car, as it traveled up and down, and one endless chain could be employed in connection therewith.

The fusible link attachment is designed to automatically disengage gears 15 and 16 and the sprocket vwheel and chain, as described, in case of fire; the weight 33, upon being released by the fusible link 85, depressing the rearward en d of yoke 30 and raising its forward end, thereby disengaging said gears and permitting the vdoor to automatically close.y

The grooved spools 10, 10", with the cables wound thereon, each cable upon itself as described, afford means for automatically and inversely varying the leverage applied at the bottom of the door and that applied at the top of the door, as the door i's raised and lowered; thus providing for variously counterbalancing the doorr most advantageouslyin its various positions and there y causing its effective weight to remain practically constant and the counterweight 26,

supported by `cable 27, winding upon itself on grooved spool 29, acts ,similarly as an automatically varying weight according to the different positions of the door.

The door above described, when used in its simplest form, as shown in Fig. 9, without the-fusible link attachment, needs no counterweighting, being'easily raised and low ered by a pull upon the chain and adapted,

through theaction of the grooved spools, .to remain in any position it may assume; thus having a marked advantage overall other doors o f a similar.character, in all of .which it is necessary to employ a counterbalance equal in weight to that of the door, thus doubling the weight to be supported and operated and thereby increasing the fric- A tion to be overcome and the consequent strain upon the parts.

The cables 7, arranged as described, cause the upper`end of the 'door to travel in a substantially horizontal plane, traveling for wardly at a constantly decreasing and rearwardly-,at a constantly rincieasing speed, thereby insuring its closing; the s'peed of the bottom of the door being just the re` verse, gradually increasing as the door is raised and gradually decreasing as the door closes.

ln combination, `a slide-up turn-over door; a frame therefor; a rotary shaft horizontally disposed above and forwardly of the frame; one or more double grooved spools iixedly mounted on said rotary shaft; a cable 'of approximately the width of the grooves attached to each spool and'to the door at or near the to-p thereof and wound upon itself in one of said grooves in one direction, when the door is closed or lowered; another cable attached to each spool and to said door at or near the bottom thereof and wound upon itself in the other of said grooves in the opposite direction, when the door is opened or raised; and means for rotatably reciprocating the shaft, thereb raising and lowering the door.

lln testimony whereof I have aiiixed my signature, in presence of two witnesses.



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2575201 *Jan 8, 1946Nov 13, 1951Blaw Knox CoCurved track overhead door
US2609196 *Dec 24, 1947Sep 2, 1952Vries Robbe & Co DeDevice for imparting a tumbler motion to vertical structural parts
US5743046 *Mar 31, 1997Apr 28, 1998The Chamberlain Group, Inc.Jack shaft door garage operator
US7372225Feb 27, 2006May 13, 2008Overhead Door CorporationBarrier operator with flexible drive member
US20070200519 *Feb 27, 2006Aug 30, 2007Overhead Door CorporationBarrier operator with flexible drive member
USRE40001 *Apr 12, 2000Jan 15, 2008The Chamberlain Group, Inc.Jack shaft garage door operator
WO1996038644A1 *May 28, 1996Dec 5, 1996The Chamberlain Group, Inc.Jack shaft garage door operator
U.S. Classification49/200
International ClassificationE05F15/16
Cooperative ClassificationE05Y2900/106, E05F15/1661
European ClassificationE05F15/16B9D