US1758872A - Lock - Google Patents

Description

R. WHEELER May 13, 1930.

LOCK

Filed Jan. 5. 1929 2 sheets-sheet l BY i ATTORNEY ////////////Jf///////////I R. WHEELER May 13, 1930.

LOCK

Filed Jan. 5, 1929 2 sheets-snee:

INVENTOR Faer' 7W? S E S S E N H W BY ze);

ATTORNEY Patented May 13, 1930 UNITED STATES ROBERT WHEELER, F WELLSBURG, WEST VIRGINIA LOCK Application led January 5, 1929. Serial No. 330,547.

My invention relates to gravity locks, and consists in the construction, arrangement and combination of parts as set forth in the following specification.

It is an object of my invention to provide a lock wherein the bolt is projected by gravity, eliminating the use of springs.

A further object of the invention is to provide a simple locking means, whereby manipulation of the bolt, from the outside of a door is prevented.

A still further object of the invention is the provision of a lock which cannot be picked or operated by the use of skeleton keys or the like.

Additional objects'and features of invention will be apparent from t-he following description and accompanying drawings forming a part of this specification, wherein- Figure 1 is a fragmentary perspective view of a door, partly in section equipped with my lock.

Figure 2 is a side view of the lock, the cover plate having been removed, and showing the bolt projected.

Figure 3 is a similar view showing the position of the parts with the bolt in retracted position.

Figure 4 is a cross section on the line 4-4 30 of Figure 2.

Figure 5 is a cross section on the line 5-5 of Figure 2. b Figure 6 is a perspective view of the latch Figure 7 is a perspective view of the weight.

Figure 8 is a detail perspective view of the key-operated bolt.

Figure 9 is a detail perspective view of the latch detent.

Figure 10 is a detail perspective view of the latch operating means.

Figures 11 and 12 illustrate the key and operating means.

There is illustrated a mortise lock 1 having a casing 2, which may be of any well known construction, and in the present instance is shown as rectangular, having a base 3 and cover plate 4r. The base 3 and cover plate 4 are apertured as at 5, for a purpose hereine after explained.

The latch-operating means 6 comprises a tubular portion 7 terminating in trunnions 8, these t-runnions being j ourn alled in the apertures 5 of the base and cover plate. The tubular portion 7 is provided with a squared opening 9, for reception of a well known operating shaft 10.

At diamctrically opposite sides of the tubular member 7 and formed integrally therewith, I provide cam portions 11, which co-act with shoulders 11a of the bolt to cause retraction thereof upon rotation of the shaft 10, as will be more fully explained.

A bolt 12 is slidably engaged through one end of the case 2, the bolt having an enlarged portion 13, cut away as at 14 for reception of the cam portion 11. The central portion of the enlargement is provided with a semicircular recess 15 for engagement around the tubular portion 7. Upon the bolt 12, intermediate its ends, I provide lugs 16 and 16 disposed on opposite sides of the bolt, as clearly shown in Figure 6.

A weight 17 is eccentrica-Hy mounted within the case 2, the portion adjacent its pivot 18 being cut away to form a recess 19 of a shape to t over the enlargement 13. The weight 17 has a bill 20 adjacent the pivot 18, the bill being of a length to engage within the space provided between the enlargement 13 and the lug 16.

In the present construction I provide means for locking the bolt 12 against movement, from either side of the casing 2, and this is eiected through the bolt 21, aswill now be explained. The bolt 21is slidably supported upon the lower partof the case 2, and is provided with an opening 22 for reception of a suitable key which may be inserted through the key-hole 23 of the case 2. The upper part of the bolt body is curved as at 24L to conform to the recess 25 upon the lower side of the weight 17. The bolt 21 thus supports the weight 17 so as to prevent undue friction between the enlargement 13 and the weight 17 The front portion of the bolt is provided with a shoulder 26 adapted to receive a detent 27, (see Fie'. 2). The bolt 2l has a rearwardly extending leg portion 28, the upper surface of which is recessed as at 29 to receive the lug 30 of the latch 31. From the foregoing, it will be noted that the latch 31 serves the dual function of retaining the bolt 21 in proper alignment, as well as being the means for establishing locking engagement between the detent 27 and bolt 12.

The detent 27 is eccentrically mounted within the case 2, as at 32, and has angularly disposed bill portions 33 and 34. The bill 33 is arranged so as to be engaged between the lug 16 and enlargement 13 of bolt 12, while the bill 34 is positioned so asto engage within the shoulder 26, at times.

In the operation of my lock, the shaft 1() is turned, in either direction, such movement imparting motion to the operating means 6. and consequently retracting the bolt 12 by virtue of Contact between one of the cam portions 11 and the shoulders 11a of the bolt. Iearward movement of the bolt 12 imparts an upward swing to the weight 17 by reason of engagement of the bill 20 with the lug 16. Upon release of the shaft 10, the weight 17 will fall, by gravity, urging the bolt 12 into projected position.

In the event that it is desired to lock the bolt 12 against retraction, a key not shown may be inserted through the key hole 23 and rotated, thereby engaging the front wall of f the opening 22 of bolt 21, moving it forwardly so-that the shoulder 26 engages beneath the. bill 34, and the detent 27 the bill 33 of which engages lug 16 of the bolt 12 thus vpreventing movement of the shaft 10, as will be readily understood from a consideration of Fig. 2.

rIjhe'occasion may arise where it would be desirable to prevent operation of the latch from one side of a door equipped with my lock, and this may be accomplished by manip.- ulation of the key 35 which is designed to be inserted lengthwise in a sleeve 31 mounted in .the lock casing at the rear of bolt 21. Thissleeve has a laterally extending wing or lug 30 positioned in the path of bolt 21 so that movement of the key 35 in a clockwise direction, as viewed in Figure 2) will rotate the lug 30, causing it to engage the rear edge of the bolt 21 and slide into engagement with the bill34. IVith the lug 30 in the position shown in Figure 2 it will be seen that the shaft 10 is effectively locked against rotation, and the bolt 21 cannot be manipulated by a key inserted through the key-hole 23, since the lug 30 prevents rearward movement of the bolt 21. Release of the bolt can only be effected through counter-clockwise movement of the key 35 to position the lug 30 as shown in Figure 3.

I claim:

1. In a lock, the combination of a case, a bolt projectable through one side thereof, said bolt being provided with a recessed enlargev against swinging movement when the bolt is in its projected position.

2. In a lock, the combination of a case, a bolt projectable through one side thereof, said bolt being formed with lugs and an enlargement to provide a top notch and a bottom notch, knob operating means for the bolt,

an eccentrically mounted weight within the case having a bill engaging in the upper notch of the bolt and normally urging said bolt into projected position, a pivoted detent below the bolt having a bill within the lower notch which causes the detent to swing with the projection and retraction of the bolt, and key operated means for locking the detent against swinging movement when the bolt is projected.

3. In a lock, the combination of a case, a bol-t projectable through one side thereof, said bolt being` formed with lugs and an enlargement to provide a top notch and a bottom notch, knob operating means for the bolt, an eccentrically mounted weight within the case having a bill engaging in the upper notch of the bolt and normally urging said boltinto projected position, a pivoted detent below the bolt having a bill within the lower bolt projectable through one side thereof, said bolt being formed with lugs and an enlargement to provide a top notch and a bottom notch, knob operating means for the bolt, an eccentrically mountedweight within the case having a bill engaging in the upper notch of the bolt and normally urging said bolt into projected position, a pivoted detent below the bolt having a bill within the lower notch which causes the detent to swing with the projection and retraction of the bolt, a second billor extension formed on the detent adapted to be spaced from the walls of the casing when the bolt is proj-ected and a second bolt located within the casing and adapted to be shifted longitudinally by a key for bringing the same beneath the second bill of the detent and locking said detent against swinging movement.

5. In a lock, the combination of a case, a bolt projectable through one side thereof, said bolt being formed with lugs and an enlargement to provide a, top notch and a, bottom notch, knob opera-ting means for the bolt, an eccentrically mounted Weight Within the case having a bill engaging in the upper notch of the bolt and normally urging said bolt into projected position, a pivoted detent below the bolt having a bill Within the lower notch which causes the detent to swing with the projection and retraction of the bolt, a second bill or extension formed on the detent adapted to be spaced from the Walls of the casing When the bolt is projected, et second bolt located Within the casing and adapted to be shifted longitudinally by a key for bringing the same beneath the second bill of the detent and locking said detent against swinging movement and key operated means for locking the second bolt in its engaging position with said detent.

ROBERT WHEELER.

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