US1460687A - tomkinson - Google Patents

Description

C. C. TOMKINSON DOOR July 3, 1.923. 1,460,687

Filed March 22 1.922 2 Sheets-Sheet l 'July 3, 1923. 1.460,687

C. C. TOMKINSON DOOR Filed March 22, 1922 2 Sheets-Sheet 2 auventoz ZZWLZW GHQ Mau Patented July 3, 1923.

UNITED STATES PATENT OFFICE.

mm C. TOIKINSON, O! PLAINFIELD, NEW JERSEY, ABSIQHOB TO J. EDWARD OGDEN, OF HOUNTAINVILLE; NEW YORK.

nooal Toallwhomitmay concern:

Be it known that I, CHARLES C. TOMKIN sort, a citizen of the United States, and a resident of Plainfield. county of Union, and State of New Jersey, have invented certain new and useful Improvements in Doors, of which the following is a specification.

This invention relates to improvements in door structures such as those used for closing large door openings in ier sheds, warehouses and places of like c aracter.

Doors of this type usually comprise a plurality of door sections which in opening are moved vertically and then laterally or inwardly to an inclined or horizontal position. By swinging the door sections to such an inclined position, head room in the warshouses or pier sheds is conserved.

Because of their size and the exposed positions in which they are placed, doors of the type described are subjected to unusual strains and pressures. such, for instance, as heavy wind pressures.

This invention has for its object to provide door mechanism of the character de scribed so constructed and arranged as to withstand the severe lateral pressures to which they are subjected.

Another object of the invention is to provide simple and effective counterbalancing mechanism and to so connect this mechanism to the door that the counter balancing means will assist in withstanding inward lateral pressure against the door and will assist in retaining the door in engagement with the door casing or jamb.

Further objects of the invention will appear from the following specification taken in connection with the drawings which form 9. art of this application and in which-- ig. 1 is a sectional elevation of a door constructed and counterbalanced in accordsince with the invention.

Fig. 2 is a sectional elevation similar to Fig. 1 but showing the door sections in open position.

Fig. 3 is a top plan view of a portion of the structure shown in Fig. I.

Fig. 4 is a transverse sectional elevation showing the overlapping door sections and the link and chain connections thereof.

Fig. 5 is a sectional elevation similar to Fig. 1 but showing another supporting and tilting structure. and

Fig. 6 is a view similar to Fig. 5 but showin the door sections in 0 en position.

The objects of the invention are attained in the embodiments of the invention described b providing an arrangement for guiding tlle sections as they move vertically and for tilting or swingin the sections inwardly as they move in unison to open position. The counterbalancing means is con nected to the doors in a manner to assist in raising the doors and is further so connected that a horizontal component of the counterhalancing force will force the door against the door casing or 'amb and thereby withstand any inward lateral pressure such as that caused by, wind.

Referring to the drawings, and first to Figs. 1-4 inclusive. I have shown a door comprising a lower section 10 and an upper section 11, the lower section being guided in its vertical movement by the engagement of rollers 12 carried at the lateral edges thereof with vertical tracks 13. The lower section is further guided by means of flanges 11 carried by the upper door section and overlapping laterally extending flanges 15 formed on or secured to the edges of the lower section 10.

In the embodiment of the invention shown in Figs. 1-4 inclusive, the tilting means for swinging the door sections inwardly consists of links 16 pivoted at 17 to fixed brackets 18 secured to the door casing or wall of the building and pivoted at their opposite ends at 19 to brackets 20 secured to the lateral edges of the upper door section 11 and extending inwardly therefrom.

The counterbalancing means for the. door sections shown in Figs. 14 comprises a single counterweight.21 which is connected to a sheave 522 under which asses a cable or rope 23. One portion of this cable 23 passes around a sheave 24 loosely mounted on a shaft 25 and is connected as shown at 26 to a point on the bracket 20 and it should be particularly noted that the oint 26 is laterally ofiset or spaced inward v from the plane of the upper door section 11. The point 26 is also positioned in a plane between the upper and lower edges of the upper door section and adjacent the middle of this door section.

The opposite end of the cable or chain 23 p ses over a sheave 27 secured fast to the shaft 25 and from this sheave passes downwardly and is connected as shown at 28 to the lower door section 10 adjacent the lower edge thereof.

The vertical location of the points of connection 26 and 28 of the ends of the cable or chain 23 to the door sections 11 and 10 respectively may be varied if desired to vary the counterbalancing effect of the weight 21.

The construction shown in Figs. 1-4 in elusive, operates in the following manner. When the doors are in their closed )osition shown in Fig. 1 they may be opened by a plying force to the shaft 25 in any suitab e manner whereupon the sheave 27 will be rotated. This rotation will cause the lower door section 10 to rise vertical] until this section overlies the section 11. urther vertical movement of the lower door section will cause brackets 29 carried by the upper edge of this section to engage the upper door section whereupon the two sections will be swun laterally and inwardly by the links 16 to t e inclined or horizontal position shown in Fig. 2. When the door sections are closed particular attention is directed to the fact that because of the spacing of the point 26 of connection between the chain 23 and the upper door section 11 from the plane of the upper door section, the counter-balancing weight 21 will have a horizontal component of force which will grass the upper door section against the o0! casing. This outward pressure will effectively counteract or withstand any inward pressure caused by the wind or other forces tendin to force the upper section 11 away from t e door casing and therefore tending to support the upper door section from the lower door section.

In Figs. 5 and 6 another embodiment of the invention is illustrated and in this form of the invention the door sections 10 and 11 are constructed in the same manner as in the embodiment already described. In Figs. 5 and 6 however, a track 30 is used for supporting and swinging the door sections inwardlyto the horizontal position shown in Fig. 6. The upper door section 11 has formed on or secured thereto a pair of brackets 31 having projections or rollers 32 mounted thereon and the rollers 32 are dis posed in the tracks 30.

In this instance a separate counterweight is provided for each door section. A counter weight 33 is secured to a cable or chain 34 which passes over a sheave 35 mounted in the bracket 36 and the opposite end of the cable 34 is secured to the lower door section 10 at a point 37 shown as disposed adjacent the lower end of this section.

A counterweight 40 is connected to a cable 41 passing over a sheave 42 mounted on the bracket 36 and the opposite end of this cable is connected at shown at 43 to a bracket 44 secured to and extending inwardly from the u per door section 11. It will be seen that e point 43 is spaced inwardly from the plane of the upper door section and therefore that the counterweight 40 will have a horizontal component of force that will press the door section 11 against the door Although the door shown in Figs. 5 and 6 is shown only in elevation, it should be understood that a air of counterweights 33 and 40 is preferably provided at each edge of the door.

The construct-ion shown in Figs. 5' and 6 operates in substantially the same manner as that shown in Figs. 1-4 and differs therefrom only in thatthe door sections will be swung laterally and inwardly by the tracks 30 instead of by the links 16.

Although certain specific embodiments of the invention have been particularly shown and described, it will be understood that the invention is capable of further modification and that further changes in the construction and in the arrangement of the various cooperating parts may be made without departing from the spirit or scope of the invention as expressed in the following claims.

What I claim is 1. In combination, a door casing, a door having horizontally opposite parts arranged to move vertically, means for swinging the door inwardly as the vertically movable parts are raised, sheaves mounted substantially vertically above the door, and counter balancing means including cables extending over said sheaves and connected to sai door in a plane offset from the plane of the door when the door is closed whereby the portions of the cables between the sheaves and door connection will be inclined to the vertical and said count/erbalancin means will exert a horizontal force against the door to force'the door against the door cas 2. n combination, a door casing, a door having horizontally opposite parts arranged to move vertically. means for supporting and the door inwardly as t e vertically mova le parts are raised, sheaves mounted substantially vertically above the door, andconnter balancing means including cables extending over said sheaves and connected to said door in a plane offset from the plane of the door when the door is closed whereby the portions of the cables between the sheaves and door connections will be inclined to the vertical and said counter' balancing means will exert a horizontal force against the door to force the door against the door casing.

3. In combination, a door casing, a door having horizontally opposite parts arran tomove vertically, link means for swinging the door inwardly as the verticall movable parts are. raised, sheaves mounte substantially vertically above the door, and counter balancin means including cables extending over sai sheaves and connected to said door in a plane offset from the plane of the door when the door is closed whereb thelportions of the cables between the s caves and door connections will be inclined to the vertical and said counter-balancing means will exert a horizontal force against the door to force the door against the door casing.

4. In combination, a door casing, a door having horizontally opposite parts arranged to move vertically,means for swinging the door inwardly as the vertically movable parts are raised, sheaves mounted substantially vertically above the door, and counterbalancing means including cables extending over said sheaves and connected to said door, intermediate the upper and lower edges thereof and in a plane offset from the lane of the door whereby the portions 0 the cables between the sheaves and door connections will be inclined to the vertical and said counterbalancing means will exert a horizontal force against the door to force the door against the door casing.

5. In combination, a door casing, a door having horizontally opposite parts arranged to move vertically, means for swinging the door inwardly as the vertically movable parts are raised, sheaves mounted substantially vertically above the door, and counterbalancing means including cables extending over said sheaves and connected to said door in a plane inwardly s need from the plane of the door when the oor is closed whereby the portions of the cables between the sheaves and door connections will be inclined to the vertical and said counterbal ancing means will exert a horizontal force. against the door to force the door against the door casing.

6. In combination, a door casing, a door having a plurality of sections arranged to move vertically, means for swinging the door inwardly .as the vertically movable sections are raised, sheaves mounted substantially vertically above the door, and counterbalancing means including cables extending over said sheaves and connected to said door in a plane offset from the plane of the door when the door is closed whereby the portions of the cables between the sheaves and door connections will be inclined to the vertical and said counterbalaneing means will exert a horizontal force against the door 'to force the door, against the door easing.

7, A door comprising a pair 0 vertically and inwardly movable up and lower sections, means for suglporting and swinging said sections inwar y as the sections are raised, sheaves mounted substantially vertically above the door counterbalancing means, and operative connections between said counterbalancing means and said sections, said means including cables extending over said sheaves and connected to the lower section adjacent the lower ed thereof and to the upper section intermediate the upper and lower edges thereof and in a plane olfset from the plane of the door section when the door is closed.

8. A door comprising a pair of vertically and inwardly movable upper and lower sections, means for su porting and swinging said sections inwar ]y as the sections are raised, sheaves mounted vertically above said door sections, counterbalancing means, and operative connections between said counterbalancing means and said sections, said means including a single counterweight, a sheave connected thereto and a cable passing around the counterweight sheave and around said first mentioned sheaves and connected to the lower section adjacent the lower edge thereof and to the upper section intermediate the upper and lower edges thereof and in a plane offset from the plane of the door section when the door is closed.

9. A door comprising a pair of vertically and inwardly movable up r and lower sections, means for supporting and swinging said sections inwardly as the sections are raised, sheaves mounted vertically above said door sections, counterbalancing means, and operative connections between said counterbalancing means and said sections, said means including a cable extending over said sheaves and connected to the lower section adjacent the lower edge thereof and to the upper section intermediate the upper and lower edges thereof and in a plane spaced inwardly from the plane of the door section when the door is closed.

10. In combination, a door with two vertically and horizontally movable sections, and a shaft disposed vertically above the door by the rotation of which they are raised and moved laterally on the opening of the door, of a sheave fast to said shaft and a sheave loose thereon, a counterweight equal to the weight of both door sections carrying a sheave and a. flexible element connected at one end to the bottom of the lower door section and at its other to substantially the middle of the upper section 1 th 1' v and a (point spaced inward y from e p ane no of sai section when the door is closed.

In witness whereof, I have hereunto set my hand this 9th dayof March, 1922.

CHARLES C. ToM INsoN.

' Witness:

- I. B. Moon.

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