US2887865A - Door lock - Google Patents

Description

May 26, 1959 c; c. MOLER DOOR LOCK Filed Aug. 29, 1956 5712' F l0 INV/E)I;T0/R. fl I vBYC fiar/es C. 0 ef 147 TORNEX united States P efi o r DOOR LOCK Charles 'C. Moler, Hartford jCity, Ind., assignor to Overhead Door Corporation, Hartford City, Ind.

Application August 29, 1956, Serial N0. 606,843 4 Claims. 01. 10-149 This invention relates to a lock for upwardly acting doors and the like.

The main objects of this invention are:

First, to provide a lock for upwardly acting doors and the like which may be opened from either side of the door but requires a key for opening from the outer side.

Second, to provide a lock structure having these advantages which is relatively simple in its parts and easily installed.

Objects relating to details and economies of the invention will appear from the description to follow. The invention is defined and pointed out in the claims.

A preferred embodiment of the invention is illustrated in the accompanying drawings, in which;

Fig. 1 is a fragmentary front elevational view of an upwardly acting door, shown conventionally, embodying my invention.

Fig. 2 is a fragmentary view partially in vertical section and partially broken away.

Fig. 3 is a fragmentary view partially in vertical section on a line corresponding to line 3-3 of Fig. 2, parts being shown in locking position by full lines and in unlocked position by dotted lines.

Fig. 4 is a detail view of the lock with the outer casing member removed from the back plate, the bolt members being shown in unlocked position and as actuated to that position by the outer handle.

In the accompanying drawing 1 represents a door frame, 2 a sectional upwardly acting door and 3 the door sill. The upwardly acting door illustrated is formed of sections 4, the hinge members therefor not being illustrated as they form no part of my present invention but they may be such as is illustrated in the Blodgett Patent 2,575,255, November 13, 1951, which patent also shows a track for the door.

The sill 3 is provided with a bolt opening 5 and on the underside of the sill is a keeper 6 with which the pair of bolt members 7 coact when the door is in closed position, as shown in Figs. 2 and 3. The bolt members 7 are pivotally mounted on the casing back plate 8 at 9. The bolt members have beveled tips 10 and are provided with outwardly facing keeper receiving recesses 11 providing keeper engaging shoulders 12. Below their pivots the bolt members 7 are provided with facing recesses 13 in which the coiled spring 14 is seated, the spring being positioned below the pivots 9 and acting to yieldingly bias the bolt members to keeper engaging position.

The casing back plate is secured to the inner side of the door by means of screws 15. The outer casing member 16 is of inwardly facing channel section and is provided with flanges 17 which overlap the back plate and is secured to the back plate by means of the screws 18. The bolt members project from the lower end of the easing as is clearly shown in the drawing.

The inner handle 20 is rotatably mounted on the back plate and outer casing member and its spindle 21 is provided with a double ended cam 22 disposed between the bolt members above their pivots. The actuated position 2,887,865 Patented May 26,. 1959 of the cam is indicated by dotted lines in Fig. 3 in which position the outer ends of the bolt members are brought together against the tension of the spring 14 to clear the keeper and permit the opening of the door.

The spindle 23 of the outer handle 24 is provided with a double ended cam 25 which is disposed above the cam 22. The handle 24 is rotatably mounted on the escutchcon 26 and is provided with alock designated generally by the numeral 27 and comprising a lock cylinder 28 and a bolt 29 which may be engaged with or disengaged from the'spindle 23. 1

As the details of the lock form no part of my present invention they are not further illustrated. Lock devices of this type are in commercial use, quite commonly designated spinning handle lock. However, attention is directed to the Keeler Patent 1,828,468, October 20, 1931, as disclosing a handle lock structure, which may be used.

With this arrangement of parts the bolt members automatically engage when the door or other closure member is moved to closed position. The beveled ends 10 of the lock member engage the edges. of the slot 5 in the sill and are forced together as shown by dotted lines, Fig. 3, and when the door is fully closed the lock members are automatically engaged with the keeper by the spring 14. The lock may be released from the inside of the door without the use of a key but a key is required to disengage the bolt member from the outside of the door.

It will be noted that with the double ended earns the spindles are automatically returned to initial position by the spring 14.

I have illustrated and described my invention as embodied in an upwardly acting sectional door of a truck or trailer. It will be understood, however, that it is capable of use with a wide variety of closures. I have not attempted to illustrate or describe such various embodiments or adaptations as it is believed that disclosure will enable those skilled in the art to embody or adapt the invention as may be desired.

Having thus described the invention, what is claimed as new and is desired to be secured by Letters Patent is:

1. In a latch, a bolt casing comprising a back plate adapted to be secured to the inner side of a closure member, an outer casing member disposed upon and secured to said back plate, a pair of bolt members disposed between said back plate and said outer casing member and pivotally mounted on said back plate intermediate their ends and projecting from said outer casing member for engagement with a keeper, said bolt members having outwardly facing cammed keeper engaging ends and outwardly facing keeper engaging recesses spaced inwardly from said cammed ends, said bolt member also having opposed inwardly facing recesses disposed within said outer casing member and outwardly relative to their pivots, a coil bolt actuating spring seatedly engaged in said opposed recesses in said bolt members and acting to yieldingly urge them to keeper engaging position, an inner handle provided with a spindle rotatably mounted on said outer casing member and provided with a double ended bolt releasing cam disposed within the casing and between said bolt members at the inner side of their pivots for actuating the bolt members to and holding them in re tracted keeper disengaging position, an outer handle spindle projecting through said back plate and provided with a double ended bolt releasing cam of a length exceeding that of said first named bolt releasing cam and disposed between said bolt members and at the inner side of said first named bolt releasing cam, and an outer handle having key controlled connection to said second spindle.

2. In a latch, a bolt casing comprising a back plate adapted to be secured to the inner side of a closure member, an outer casing member disposed upon and secured to said back plate, a pair of bolt members disposed between said back plate and said outer casing member and pivotally mounted on said back plate intermediate their ends and projecting from said outer casing member for engagement with a keeper, said bolt members having outwardly facing keeper engaging recesses, said bolt member also having opposed inwardly facing recesses disposed within said outer casing member and outwardly relative to their pivots, a coil bolt actuating spring seatedly engaged in said opposed recesses in said bolt members and acting to yieldingly urge them to keeper engaging position, an inner handle provided with a spindle rotatably mounted on said outer casing member and provided with a bolt releasing cam disposed within the casing and between said bolt members at the inner side of their pivots for actuating the bolt members to and holding them in retracted keeper disengaging position, an outer handle 'spindle projecting through said back plate and provided with a bolt releasing cam disposed between said bolt members in laterally spaced relation to said first named bolt releasing cam, and an outer handle having key controlled connection to said second spindle.

3. In a latch, a bolt casing comprising a back plate adapted to be secured to the inner side of a closure memher, an outer casing member disposed upon and secured to said back plate, a pair of bolt members disposed between said back plate and said outer casing member and pivotally mounted on said back plate intermediate their ends and projecting from said outer casing member for engagement with a keeper, said bolt members having outwardly facing cammed keeper engaging ends and outwardly facing keeper engaging recesses disposed inwardly from said cammed ends, a bolt actuating spring disposed between and seatedly engaged with said bolt members at the outer sides of their pivots and acting to urge them to keeper engaging position, an inner handle provided with a spindle rotatably mounted on said outer casing member and provided with a bolt releasing cam disposed within the casing and between said bolt members at the inner side of their pivots for actuating the bolt members to and holding them in retracted keeper disengaging position, and an outer handle spindle projecting through said back plate and provided with a bolt releasing cam disposed between said bolt members, and an outer handle having key controlled connection to said second spindle.

4. A latch comprising a bolt casing, a pair of bolt members pivotally mounted Within said casing to project therefrom and having outwardly facing keeper engaging members, a bolt actuating spring disposed between said bolt members at the outer side of their pivots and acting to yieldingly urge them to keeper engaging position, an inner handle provided with a spindle rotatably mounted on said casing and provided with a cam disposed between said bolt members at the inner side of said pivots for retracting them and holding them in keeper disengaging position against the tension of said actuating spring, and an outer handle provided with a spindle projecting oppositely from the spindle of said inner handle and provided with a cam disposed within said casing between said bolt members for retracting them and holding them in keeper disengaging position, said outer handle having key controlled connection to its said spindle.

References Cited in the file of this patent UNITED STATES PATENTS 509,304 Forbes Nov. 21, 1893 786,961 Drakes Apr. 11, 1905 840,297 Campbell Jan. 1, 1907 1,272,590 Wightman July 16, 1918 1,601,539 Harrington Sept. 28, 1926 1,828,468 Keller et al. Oct. 20, 1931 FOREIGN PATENTS 2,983 Great Britain Feb. 5, 1902

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