US1727054A - Tubular dead-bolt lock - Google Patents

Description

P 1929' w. Y. FARNSWORTH 1,727,054

TUBULAR DEAD BOLT LOCK Filed May 14, 1927 I2 FE Ill u IIIIIIII k Ill l,

III

Patented Sept. 3, 1929.

UNITED STATES" PATENT OFFICE.

WILLIAM Y. FARNSWOBTH, 0F SEATTLE, WASHINGTON, ASSIGNOR TO FRANK E.- BEST, INO., OF SEATTLE, WASHINGTON, A CORPORATION OF WASHINGTON.

TUBULAR DEAD-BOLT Loox.

Application filed May 14,

My invention relates to improvements in dead bolts and the object of my invention is to provide a dead bolt of simple and efliclent construction that is adapted to be contained within a tubular housing and to be operated from either side of a door in which it 1s mstalled.

Another object is to provide a dead bolt 1n which the bolt member is positively locked in both the retracted position and the outwardly projected or. looking position.

Another object is to provide novel throw means by which the bolt member in a lock of this nature may be operated by two primary lock mechanisms located on opposite sldes of a door without either of said primary locks interfering with the operation of the other primary lock.

More specific objects are to provide a lock of this nature in which the throw mechanism is composed of two larger discs'supported in spaced apart, relatively rigid, relation by combined throw and bolt locking means, each of said larger discs being connected w1th an operating device, as a primary lock mechanism, by means including a smaller dlsc that is mounted in the larger disc so that 1t may be freely rotated through a limited angle relative to the larger disc.

Other and more specific objects will be apparent from the following description taken in connection with the accompanying drawin s.

In the drawings Figure 1 is a longitudinal mid-section on broken line 1-1 of Fig. 2, of a tubular dead bolt lock constructed in accordance with my invention, a fragment of a door in which the lock is installed being shown. I

Fig. 2 is a sectional view on broken line 22 of Fig. 1, the door being omitted.

Fig. 3 is a cross section on broken line 3 3 of Fig. 2.

Fig. 4 is a fragmentary sectional view of the rear end of the lock showing the throw mechanism in retracted position.

Fig. 5 is a detached plan view of the throw member.

Fig. 6 is a detached isometric view of one of the smaller discs embodied in the throw member.

Referring to the drawings, throughout which like reference numerals designate like parts, I show a two part housing composed of two half shells 6 and 7 of duplicate construction adapted to be 1927, Serial No. 191,401.

placed with their open sides together to form a lock housing of substantially cylindrical shape, One of said half shells normally being positioned on each side of the medial vertical plane of the lock when the lock is installed. 7 At the front end, the half shells are narrowed as at 8 and are. shaped rectangular-1y to form a guide for a rectangular dead bolt 10. Flanges 11 extend sidewise from each side of the narrowed guide portions 8 and are clinched beneath rearwardly and inwardly bent edges 12 of a front plate 13 thereby holding the half shells in assembled relation at the front end. A face plate 14 is placed over the front plate 13 when the lock is installed. The major portion of the housing formed by the half shells ,6 and 7 is of cylindrical shape but said half shells are flattened at their rear ends as at 15 to afford more room for external locks and the flattened sides are provided with oppositely arranged circular holes that have the metal around their edges bent inwardly to form bearing hubs 16. The two half shells are secured together at the rear end by an end plate 17 that cooperates with lugs 18 on the half shells 6 and 7 in holding said half shells in assembled relation. A partition plate 20 having a slot 21 therein is secured within the cylindrical portions of the half shells for the rear end of a compression spring 22 to abut against. The front end of the spring 22 engages with the end of the bolt 10 and urges said bolt outwardly. A tongue 23 is secured by a pin 29 to the bolt 10 and extends rearwardly therefrom through the slot 21 in the partition plate 20. To the rear of said partition plate the tongue 23 is widened as at 24 to afford shoulders 25 that are adapted to strike against the partition plate 20 and limit the outward movement of the bolt 10.

The novel features embodied in this hous ing are claimed in a copending application of even date herewith while the novel features that are claimed in this application reside in the bolt operating means hereinafter described.

In accordance with this invention I provide a throw member assembly, Fig. 5, em-

bodying two discs 26 of-duplicate construcis provided with a circular hub 30 that projects outwardly therefrom and is adapted to be rotatably supported in the adjacent hearing hub 16 of the housing. Rotatably mounted within a circular opening in the hub portion 30 of each disc 26 is a smaller disc 32, Fig. 6, that has two throw pins projecting outwardly therefrom, said throw pins being adapted to fit within suitable holes in the respective key plugs of primary lock mechanisms 34 and 35 by'which the dead bolt may be operated.

The larger discs 26 are each counterbored on both the inner and the outer sides to form substantially semicircular flanges 36 against which the outer flange portions 37 of the smaller discs 32 may rest. The flanges 36 only extend substantially half way around the openings formed in the discs 26, said flanges being cut awa for the remaining half of the circle to a 0rd working clearance as indicated at 38 for stop members 40 respectively on the smaller discs 32. The sto members 40 are adapted to strike against t e ends of the flanges 36 and turn the entire throw member assembly bodilyin operating the lock. The lost motion afforded to each smaller disc 32 by the cut away portions 38 obviates any interference between the two rimary locks 34 and 35 and makes it possible always to operate the bolt 10 by either lock regardless of the position of the other look. A hole 41 in each disc 32 affords working clearance for the end of a key, not shown, by which the primary locks are operated. The edges of the smaller discs 32 are overlapped by the throw member 27 sufliciently to hold said smaller discs in permanently assembled relation within the larger discs 26.

The widened rear end 24 of the tongue 23 is provided with a notch 42 extending from one edge inwardly, said notch aifording, at the rear end of the tongue, an arm having a surface 43 with which one rounded end of the throw member 27 may engage to retract the bolt 10. When the bolt lOis fully retracted, Fig. 4, the rounded end of the throw member 27 will rest within a recess 44 at the bottom of the surface 43 and the bolt will be locked in retracted position so that it cannot be released except by operation of one of the locks 34 and 35. This end of the throw member 27 thus functions both as a throw and as a 'device for locking the dead bolt retracted. When the throw member 27 is released from the retracted position shown in Fig. 4 the spring 22 will move the bolt 10 forwardly and the other rounded end of the throw member 27 will enter a recess 45 at the lower forward corner of the notch 42 positively locking the bolt against retraction by any means except the locks 34 and 35. This last mentioned end of the throw member 27 thus has only the function of locking the dead bolt in the forwardly projected or locked position and may be sepais all placed within the two half shells, as

shown in Figs. 1 and 2, and said two half shells are permanently secured together by crimping the edges 12 of the front plate 13 over the flanges 11 at the front ends of the half shells and by applying the plate 17 and crimping the lugs 18 over said plate at the rear ends of said half shells. In installing the lock a hole 46 is bored inwardly from the front edge of the door and a larger intersecting hole 47 is bored crosswise of the door. The only mortising that is required is the shallow mortise for the reception of the end and face plates 13 and 14 respectively. The lock housing, composed of half shells 6 and 7, is first inserted in the bore 46 and the primary lock mechanism 34 and 35 are afterwards inserted from the sides so as to make operative connection telescopically with the pins 33. Receptacles 48 are provided for the primary locks 34 and 35.

In the operation of this look, when the bolt 10 is in the locked position the forward end of the throw member 27 will rest within the recess 45 and prevent retraction of said bolt by any means except by the locks 34 or 35. From this position, the bolt may be retracted by inserting a key in either lock and turning the discs 26 in the direction indicated by the arrow in Fig. 2, thereby turning the forward throw member 27 out of the recess 45 and at the same time causing the opposite or rear end of said throw member to engage with the surface 43 and retract the bolt 10, the rear end of said throw member. 27 dropping into the recess 44, Fig. 4, when the bolt 10 is fully retracted and locking said bolt in the retracted position until it is again released by employing one of the primary lock mechanisms 34 or 35 to turn the throw member 27 back into the position shown in Fig. 2. Movement of the throw member 27 in the arc of a circle is limited in both directions by the ends of said throw member striking on the relatively flat bottom of the notch 42. It is characteristic of a pin tumbler lock that the key can only be removed therefrom when the key plug is in one position. The clearance space 38 makes it possible to turn the key plug back to the position from which the key may be removed after either lock has been operated and this turning back of the lock after moving the bolt in one direction leaves the lock so turned, in a position to move the bolt in the opposite direction or to permit said bolt to be freely moved in the opposite direction by the other lock.

The foregoing description and accompanybodiment of this invention but it will be understood that this disclosure is merely illustrative and that such changes in this lock may be resorted to as are fairly within the scope and spirit of the following claims.

I claim:

1. In a lock of the class described, a dead bolt having a rearwardly extending portion provided with a notch that extends from one edge inwardly, and a throw member having two ends and movable on an are within said notch for moving said dead bolt, the ends of said throw member being adapted to engage bolt, said throw member having two ends that are rounded and are arranged to lock into said arcuate recesses at the front and rear corners of said notch.

3. In a lock of the class described, a bolt, a tongue extending rearwardly from said bolt and having a notch extending inwardly from one edge, the rear edge of said'notch forming a throw engaging surface, said notch having recesses at the front and rear corners adjacent the bottom, a spring urging said bolt forwardly, and a throw member of substantially triangular shape movable on an are within said notch, one end of said triangular throw member being arranged to co-act with said throw engaging surface to retract said bolt and to engage within said rearmost recess to hold said bolt retracted and another end of said throw member being arranged to engage within said forward notch to hold said bolt in a locked position.

4. The apparatus as claimed in claim 3, in which the bottom of the notch is flat and serves to limit the rotation of said throw member in both directions.

5. The apparatus as claimed in claim 3, in which two discs are provided on opposite sides of said tongue and the triangular throw anember is rigidly secured between said two iscs.

6. The apparatus as claimed in claim 3 in which two rotatably mounted discs are provided on each side of said tongue and said triangular thro'w member is rigidly mounted between said discs at a point removed from their axes of rotation.

7. In a lock of the class described, a bolt, a tongue extending rearwardly from said bolt and having a throw notch extending inwardly from one edge, the rear edge of said notch forming a throw engaging surface, two discs supported for rotation on opposite sides of said tongue, throw means rigidly mounted between said discs at a point removed from the axes of rotation of said discs, locks for rotating said discs and lost motion devices interconnecting said locks and said discs.

8. The apparatus as claimed in claim 7 in which the lost motion devices comprise small discs rotatable through a limited angle relative to the larger discs.

9. The apparatus as claimed in claim 7 in which smaller discs are mounted within said first named discs for rotation through a limited angle relative thereto and the locks are connected with the smaller discs.

10. In a lock of the class described a housing, a dead bolt in said housing having a rearwardly extending tongue provided with a widened rear end portion that is notched from one edge inwardly, the rear edge of said notch affording a thow engaging surface, said notch being provided at its bottom with front and rear locking recesses respectively, and throw mechanism embodying two larger discs rotatably supported in said housing on opposite sides of said tongue, a throw member rigidly secured between said larger discs and operative within said notch in said tongue, the ends of said throw member being rounded and being arranged to co-act with said throw engaging surface of said tongue to retract said throw member when said discs are turned, one of said rounded ends being arranged to be ositioned within said rear recess to hold said bolt in a retracted position and the other of said rounded ends being arranged to be positioned within said front recess to hold said bolt in a locked position, smaller discs mounted in said larger discs for oscillation through a limited angle relative to said larger discs and means for turning said smaller discs to rotate said larger discs and operate said bolt.

WILLIAM Y. FARNSWORTH.

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