US1253302A - Door-counterbalancing system. - Google Patents

Description

C. C. TOMKINSON. DOOR COUNTERBALANCING SYSTEM.

APPLICATION FILED OCT. WI 1916 m JML15,1918.

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,4 7TOR/VEY lid r eras Penn onion CHARLES C. TOMKINSON, OF PLAINJFIELD, NEW JERSEY, ASSIGNOR T J. EDWARD OGDEN, OF MOUNTAINVILLE, NEW YORK.

Specification of Letters Patent.

Patented Jan.ll5,1191l8.

Application filed October 10, 1916. Serial No. 124,806.

To all whom it may concern:

- Be it known that 1, CHARLES C. TOMKIN- soN, a citizen of the United States of Americe, and a resident of Plainfield, Union county, and State of New Jersey, have invented certain new and useful Improvements in Door-Counterbalancing Systems, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to improvements in systems of counterbalancing that type of doors which move vertically and away from the vertical in opening, and its object is to provide a simple arrangement of one or more auxiliary weights on the door or doors to act in conjunction with a main counterweight in such a manner as to roduce a uniform balance for the doors in t e various positions they assume during their operation.

In order that my invention may be thoroughl understood, I will now proceed to descri e the same in the following specification, and then point out the novel features thereof in appended claims.

Referring to the drawings:

Figure 1 is a sectional side elevation of a two-section door of well known construction with my invention applied thereto, the door being shown in three of the positions it assumes during its 0 eration.

Fig. 2 is a front elevation of a part of one of the door sections illustrating a detail of construction,a simple arrangement for affixing one of the auxiliary weights.

Fig. 3 shows a modified structure in side elevation in which head chains are used instead of shelf brackets to raise or support the inner ends of the door sections in their open position.

Corresponding parts are designated by the same reference characters in ,all the fig- III'GS.

designates one ofthe side posts of a door opening, 11 its threshold, and 12 its lintel.

is a lower door section, on the lower corners of which are rollers 2lwhich run on vertical tracks 22 throughout the entire length of the door opening. Hoisting chains 23 are aflixed to the lower corners of this lower door section and extend up to sheaves 24 afiixed to a transverse shaft 25 and down I to the main counterweight 26. 27 designates the mechanism for rotating shaft 25 and 28 a hand chain for actuating this mechanism.

30 is an upper door section provided at its vertical edges with guides 31 into which the lower door section slides. Links 32 are pivoted at 33 to the edges of this upper door section near the center thereof and the other ends of the links are pivoted at 34 to fixed points above the door opening.

When such a door is operated the first movement will be the vertical rise of the lower door section into the guides 31 until its lower edge is about even with the lower edge of the upper door section. lhis part of the door movement is represented by the line A in Fig. 1.

A further upward movement of the lower edge of the lower door section will carry the lower edge of the upper door section with it, but the other parts of both door sections will swing inwardly being supported by the hoisting chains 23 and the links 32. The door sections will assume the positions indicated by broken 'lines and designated 20 30 and this part of their movement is represented by the line B.

At this part of the travel of the door sections a roller 29 supported on the back of the lower door section near the top thereof, will reach the position 29 where it is about to run upon a stationary shelf bracket 35.

During the rest of the opening door movement, that represented by the line C, the inner end of the door sections will be supported by the shelf bracket. When the door is fully opened its sections will be in the position in which they are indicated by broken lines and designated by 20 -30, and the roller will be in the position 29*. Instead of the shelf bracket 35, head chains (Fig. 3) sometimes are used to support the weight of the inner edges of the door sections when opened.

When the two door sections are of such construction that their weight is uniformly distributed and are of about the same size,

shape and weight, a uniform balancing effect is required throughout the whole travel of the door and the counterweight 26 will give the desired uniform balancing efiegt. This is because of the fact that whi. lower door section is rising alone its of gravity rises therewith uniformly at the ceive its charge by slacking the draft-rope 24. The charge is then lifted by drawing the rope Q-l, the pawl 15 gripping the pipe 8 prevents the detent member from sliding upon the pi pe movingupon the pipe 9-so that the charge taken up by the fork will be lifted by the hoist to an elevation above the top of the wa onthat is to receive the load. WVhen a sutlicient elevation has been reached by the hoisting apparatus, the handle 21 of the detent member is manipulated so that the pawl 15 is swung laterally out of contact with the traveling pulley 13 thereby allowing the latter to run upon the pipe 9 and convey the hoist and fork with its load to a position over the wagon where the'load may be released in I thefcustonnn'y n'ianner by manipulating the the ground trip cord 30. The hoisting apparatusis then a new charge. As the manure'is removed from by the fork either oneor the other of the sleds may be drawn so that the I lorh will be brought from placeto place as Copies of this patent may be obtained for and prevents the traveling pulley from returned to its former position for receiving 7 shoulder for engaging the pipe upon which the detent member is mounted when the traveler bears against the pendent end of the .pawl in one direction. In apparatus ol the class described, two parallelsupportmg pipes; a traveler on one of the pipes; a detent device movably mounted upon the other of said pipes and'adapted to engage and detain the traveler from passing in one direction; and a handle for turn ing the detent member upon its support out of engagement with the traveler.

3. In combination with a pair of parallel tracks, horizontally disposed, V a traveler mounted upon'one of the'tracks; and detent member adjustably 'mounted upon the other or said pipes adapted to engage the traveler and stop its movement in one direction. I x 1 r V In combination with a supporting track; a weighted collarv slidably mounted upoi'rthe track and adapted also to be turned laterally thereupon; a handle attached to the collartormanipulating the same; and a pawl pivoted inconnection with the collar.

and having a shoulder adapted to bear against the track and bind thecollar in fixed'position upon the track whenthe pawl is pressed in one direction.

In testimony whereof I a'fliX mys'ignature,

in presence of two Witnesses." FRANK C; Witnesses:

MA'rI-IILDA. METTLER,

W. G. BURNS.

'ToBIAs) five cents each, by addressing the Commissioner of Patents, Washington, D. G. I

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into direct opposition to the counterweight 26 during these door movements B and G and will restore the balance.

In the same arrangement shown in Fig. 3, a head chain 50 attached to the upper end of the upper door section at 51 and to a fixed point 52, is used instead of a shelf bracket to support orto raise the inner ends of the door sections when open. The function of the auxiliary weights is similar in this case to that previously described.

In some cases it is feasible to determine the amount and positions of the weights l0 and 43 during the manufacture of the doors. In such cases the auxiliaryweights may be built into the door structure if desired. In

other cases the conditions attending the erection of the doors change the weights of the door sections so that for nicety of balancing effects, the final positions of the auxiliary weights have to be determined or adjusted after the installation is complete.

I have illustrated my invention as applied "to one type of door, but it is not limited to a door of any particular design or construction,vand in fact I intend no limitation other than those imposed by the following claims.

' What I claim is:

1. A door having a vertically moving portion, and another part arranged to move away from the plane of said movement, a counterweight connected with said vertically moving portion of the door, and an auxiliary weight aflixed to said other part of the door in such a position as to have a variable counteractin 1s'eflect upon the counterweight to maintain e'balance of the door in its different positions.

2. A door having means for guiding its lower edge in a vertical plane, and means for swinging the rest of the door away from said vertical plane, a counterweight connected with the lower edge of said door, and an auxiliary weight affixed to another part of the door in such a position as to have a variable counteracting efi'ect upon the counterweight to maintain'the balance of the door in its difierent positions.

3. A door having means for guiding its lower edge in a vertical plane, means for swinging the rest of the door away from said vertical plane, a counterweight connected with the lower ed e of said door, an auxiliary weight afixed to another part of the door in such a position as to have a variable counteracting efi'ect upon the counterweight, and means for permittin the adjustment of the position of said aux' iary weight on the door to thereby change its variable efi'ect upon the counterweight.

4. A door having means for gulding its lower edge in a vertical plane, and means for swinging the rest of the door away from said vertical plane, and means for supporting the weight of the part of the door which moves away. from the vertical plane as the lower edge of the door approaches the upper end of its path of travel, a counterweight connected with the lower edge of said door, and an auxiliary weight on the door above its lower edge.

5. A door structure comprising a plurality of sections, the lower edges of WhlCll move in a vertical plane, and means for swinging said door sections away from said vertical plane during a part of the door opening movement, a counterweight connected with the vertically moving part of the door structure, and auxiliary weights aflixed to the door sections in such positions as to have a variable counteracting efi'ect upon the counterweight to maintain the balance of the door in its difi'erentpositions.

6. A door structure comprising a plurality of sections, the lower edges of which move in a vertical plane and means for swinging said door sections away from said vertical plane during a part of the door opening movement, a counterweight connected with the vertically moving part of the door struc ture, auxiliary weights on the door sections in such positions as to have a variable counteracting efi'ect upon the counterweight,

and means for permitting'the adjustment of.

the positions of said auxiliary weights on the door sections to thereby change their variable efiect-upon the counterweight.

7. A door structure comprising a plurality of sections, the lower edges of which move in a vertical plane and means for swinging said door sections away from said vertical plane during a part of the door opening movement, and means for supporting the parts of the door sections which move away from the vertical plane as the lower edges of the door sections approach the upper end of their path of travel, a counterweight connected with the vertically moving part of the door structure, and auxiliary weights afiixed to the door sections in such positions as to have a variable counteracting efl'ect upon the counterweight to maintain the balance ofthe door in its difi'erent positions.

8. A door structure comprising a plurality of sections, the lower edges of which move in a vertical plane and means for swingin said door sections away from said vertica plane during a part of the door openingmovement, and means for supporting the parts of the door sections which move away from the vertical plane as the lower edges lot the door sections approach the upper end of their path of travel, a counterweight connected with the vertically moving part of the door structure, auxiliary weights on the door sections in such positions as to have a variable counteracting efi'ect upon the counterweight, and means for permitting the adjustment of the positions of said auxiliary weights on the door sections to thereby change their variable effect upon the counterweight.

9. A door structure comprising a plurality of sections, the lower edges of wh1ch move swinging said door sections away from said vertical plane during a part of the door opening movement, a counterweight connected with the vertically moving part of 'the door structure, an auxiliary weight ,on

one of the door sections in such position as to have 'a variable counteracting effect upon the counterweight, and means for permitting the adjustment of the position of said auxiliary weight on the door section to thereby change its variable effect upon the counterweight.

11. A door structure comprising a plurality of sections, the lower edges of which move in a vertical plane and means for swinging said door sections away from said vertical plane during a part of ,the door opening movement, and means for supporting the parts of the door sections which move away from the vertical plane as the lower edges of the door sections approach the upper end of their path of travel, a counterweight connected with the vertically moving part of the door structure, and an auxiliary weight aflixed to one of the door sections in such position as to have a variable counteracting eiiect upon the counterweight.

12. A door structure comprising a plurality of sections, the lower edges of which move in a vertical plane and means for swinging said door sections away from said vertical plane during a part of the door opening movement, and means for supporting the parts of the door sections which move away from the vertical plane as the lower edges of the door sections approach the upper end of their path of travel, a counterweight connected with the vertically moving part of the door structure, an auxiliary weight on one of the door sections in such positionas to have a variable counteracting efiect upon the counterweight, and means for permitting the adjustment of the'position of said auxiliary weight, on the door section, to thereby change its variable efiect upon the counterweight.

In witness whereof, I have hereunto set my hand this 28th day of September, 1916.

CHARLES C. TOMKINSON. Witnesses:

I. B. MooRE, H. BURT LAMS.

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