US3501932A

US3501932A - Window lock

Info

Publication number: US3501932A
Application number: US607684A
Authority: US
Inventors: Winford R Bishop
Original assignee: WINFORD R BISHOP
Current assignee: WINFORD R BISHOP
Priority date: 1967-01-06
Filing date: 1967-01-06
Publication date: 1970-03-24
Anticipated expiration: 1987-03-24

Description

W. R. BISHOP WINDOW LOCK Filed Jan. 6. 1967 March 24, 1970 //VV/V 70A WAY/0480 A ELEV/OP ATTOPA/EYS United States Patent 3,501,932 WINDOW LOCK Winford R. Bishop, P.O. Box 13943, Atlanta, Ga. 30324 Filed Jan. 6, 1967, Ser. No. 607,684 Int. Cl. Eb 65/08; E05c 5/02 US. 'Cl. 70-90 12 Claims ABSTRACT OF THE DISCLOSURE Background of the invention In the past, it has been common practice to lock the sashes of sliding windows together with a pivotal element connected to the upper surface of the lower sash of the window that engages a stationary element connected to the upper surface of the lower rail of the upper sash of the window. This conventional arrangement has proven unsatisfactory to some extent in that it is unsightly, tends to accumulate dust, tends to scar the upper sash if the lower sash is raised and the pivotal portion is not in its proper position, tends to bind when the pivotal portion of the conventional web is painted, and when the window is firmly locked a bending or torsion force is created between the upper rail of the lower inside sash and the lower rail of the upper outside sash. Furthermore, the conventional lock can be disengaged by unauthorized persons, or if a glass pane is broken from the window, the conventional lock can be disengaged from outside the window.

Summary of the invention The present invention comprises a plunger type mechanism wherein a plunger is telescopically received in the upper rail of the inside lower sash and insertable into a receiving space located within the lower rail of the upper outside sash, to prevent relative movement of the upper and lower sashes with respect to each other. The locking element can be moved through the upper rail of the lower inside sash by means of a key that can be selectively retained in the lock or removed from the lock when the plunger is received in the lower rail of the outside upper sash. The plunger and the receptacle of the lower rail of the upper outside sash co-act with each other when the plunger is placed in its locked position so that the upper and lower sashes are drawn toward each other and are placed into alignment with each other.

Thus, it is an object of this invention to provide apparatus for locking together the sashes of a window whereby the window cannot be unlocked without a key.

Another object of this invention is to provide a window lock capable of locking together the sashes of a window without projecting beyond the limits of the surfaces of the window.

Another object of this invention is to provide a window lock having a key whereupon the key can be retained in the lock when the lock is in its locked or unlocked position and can be removed from the lock when the lock is in its locked position.

Other objects, features and advantages of the present invention will become apparent upon reading the following specification, taken in conjunction with the accompanying drawing.

3,501,932 Patented Mar. 24, 1970 Brief description of the drawing FIG. 1 is an exploded perspective view of the lock and the manner in which it is associated with a window;

FIG. 2 is a side elevational view, in cross section, of the center rails of a window and the lock sleeve, plunger guide cylinder and outside sash cylinder;

FIG. 3 is an end view of the outside end of the lock plunger used with the lock of FIG. 1;

FIG. 4 is an end view of the inside end of the lock plunger;

FIG. 5 is an end view of the strike or outside sash cylinder;

FIG. 6 is an exploded perspective view, similar to FIG. 1, of another form of the invention;

FIG. 7 is a side view, in cross section of the lock of FIG. 6;

FIG. 8 is an end view of the lock of FIG. 7, taken along lines 88 of FIG. 7, with the key removed;

FIG. 9 is an end view of the outside end of the lock plunger used with the lock of FIG. 6.

Description of the invention Referring now more particularly to the drawing, in which like numerals indicate like parts throughout the several views, the lock 10 of FIGS. 1-5 comprises a strike or an outside sash cylinder 11, a sleeve 12, a plunger guide cylinder 13, a spring 14, a locking plunger or bolt 15, and a key 16. The outside sash cylinder 11 is generally cylindrical in shape and defines a semicircular opening 18 at one end. A pair of locking elements 19 are struck from the side wall of the cylinder 11 in such a manner that they are supported in cantilever fashion from the cylinder, with their free ends extending toward the semi-circular opening 18. The locking elements 19 will lock the outside sash cylinder 11 inside the aperture 20 of the lower rail 21 of the outside sash 22 of a window. While the locking elements 19 will tend to prevent any movement of the outside sash cylinder 11 within its aperture 20, the cylinder 11, at the option of the manufacturer, can also be formed witha plurality of longitudinally extending ribs 24 disposed around its outside circumference to further insure that the cylinder 11 does not rotate in its aperture 20.

Sleeve 12 may be received in the aperture 25 of the upper rail 26 of an inside sash 28 of a window. The sleeve 12 also has locking elements 29 struck from its sides so that they extend outwardly from the sides of the sleeve in cantilever fashion, similar to the locking elements 19 of the cylinder 11, to lock the sleeve 12 in its aperture 25. While the sleeve 12 is generally cylindrical in shape, it defines an axially extending slot 30 that extends its entire length. The slot allows the sleeve to be compressed when it is being inserted into the aperture 25, so that the aperture 25 can be formed to its exact dimension, sleeve 12 slightly collapsed to be inserted into the aperture and then expand to be firmly connected to the upper rail 26. The sleeve 12 and its slot 30 are formed so that the sleeve is slightly larger at its outer end, the inner end being slightly smaller than the dimensions of the aperture 25 to facilitate the insertion of the sleeve into the aperture. The sleeve 12 also defines an alignment port 31 to align the plunger guide cylinder 13.

The plunger guide cylinder 13 is generally cylindrical in shape and of a size to be received within the sleeve 12. The cylinder 13 includes a small projection 32 positioned along its length a distance approximately equal to the distance of the alignment port 31 from the end of the sleeve 12. When the plunger guide cylinder 13 is inserted in the sleeve 12, the projection 32 will be received in the alignment port 31 to properly align the cylinder within the sleeve.

The plunger guide cylinder 13 defines a pair of guide slots 34 and 35 which extend through its exterior surface. Slot 34 includes an axially extending portion 34a and a circumferentially extending portion 34b, while slot 35 includes an axially extending portion 35:: disposed adjacent the axially extending portion 34a of slot 34, a circumferentially extending portion 35b disposed adjacent the circumferentially extending portion 34b of slot 34 and a second axially extending portion 350. Circumferentially extending portions 34b and 35b of slots 34 and 35 are approximately equal in length and are offset about the circumference of the cylinder 13 a distance suflicient to offset axially extending portions 34a and 35a of slots 34 and 35 from each other. The axially extending portions 34a and 35a are approximately equal to each other in length, while axially etxending portion 35c of slot 35 is longer than portions 35a and 34a, and extends to the end of the cylinder 13.

'Plunger guide cylinder 13 includes a flange or bezel 36 at one of its ends that extends radially outwardly thereof and about its circumference. The flange 36 helps to prop erly position the guide cylinder 13 inside the sleeve 12 and also covers any ragged or unsightly portions of the upper rail 26 surrounding the aperture 25 that might have been caused when the aperture 25 was formed in the upper rail 26.

The plunger guide cylinder 13 also includes a radially inwardly extending flange 38 (FIG. 2) at its inner end. Coil spring 14 is constructed so that it has a diameter slightly smaller than the inside diameter of the guide cylinder 13 but larger than the inside diameter of the radially inwardly extending flange 38. Accordingly, the spring 14 can be inserted inside the guide cylinder 1-3, against the flange 38.

Locking plunger 15 is adapted to be telescopically received in the guide cylinder 13 and includes a head portion 40, a body portion 41 and a locking element 42. The head portion 40 is of a diameter slightly smaller than the inside diameter of the guide cylinder 13 while the bodyportion 41 is of a diameter smaller than the head portion 40. The spring 14 normally surrounds the body portion 41 and abuts the head portion 40. Spring 14 occupies the space defined between body portion 41 of plunger 15 and guide cylinder 13 and acts to center plunger 15 in guide cylinder 13 and forms a bearing surface for plunger 15. A pin or projection 44 extends radially outwardly from head portion 40 of the plunger 15 and normally extends through slot 34 of the plunger guide cylinder 13. Since spring 14 would normally urge the locking plunger 15 outwardly of the plunger guide cylinder 13, pin 44 rests against the end of the axially extending portion 34a of the slot 34 to retain the locking plunger 15 inside the guide cylinder 13. Of course, when the locking plunger 15 is moved axially of the guide cylinder 13, pin 44 will slide through the axially extending portion 34a of the slot 34 until it reaches the circumferentially extending portion 34b, whereupon the locking plunger 15 can be rotated and the pin 44 received in the circumferentially extending portion 34b of the slot 34. Of course, when the pin 44 is received in circumferentially extending portion 34b of the slot 34, the locking plunger 15 will be retained inwardly of the guide cylinder 13.

Locking element 42 is generally circular in cross section at its base, of a substantially smaller diameter than the body portion 41 of the plunger 15, and eccentrically attached to the body portion in such a manner that a portion of its circumference is coextensive with a portion of the circumference of the body portion 41. The portion of the locking element 42 adjacent the exterior surface of the body portion 41 of the plunger is threaded with helical threads 45, while the portion thereof disposed adjacent the interior portion of the plunger is truncated at an angle from its base toward its exterior portion to form a flat wedge surface 46. The locking element 42 is arranged to project from the end of the plunger guide cylinder 13 when the plunger 15 is telescopically moved through the cylinder 13 so that it is received in the outside sash cylinder 11. The flat wedge surface 46 faces the flat surface 18a of the semi-circular opening 18 of cylinder 11, so that when the locking element 42 is received in the cylinder 11 the wedge surface 46 urges the cylinder and outside sash 22 upwardly with respect to the inside sash 28, if the sashes are not in alignment with each other. When the plunger 15 has been inserted far enough into the guide cylinder 13 so that its pin 44 is in the proximity of the circumferentially extending portion 34b of the slot 34, the locking plunger 15 is then turned or rotated in a clockwise direction (FIG. 1) and the locking element 42 tends to pivot around the inside surface of the outside sash cylinder 11. Of course, when the locking element 42 engages the flattened surface 18a of the semi-circular opening 18, further rotation of the locking plunger 15 causes the threads 45 of the locking element 42 to engage the flattened portion 18a to further move the outside sash 22 upwardly with respect to the inside sash 28 and to draw the outside sash 22 and the inside sash 28 toward each other. While flattened portion 18a is illustrated as extending normally to the axis of plunger 15, it should be understood that flattened portion 18a may be constructed to extend at an angle corresponding to the angle of the threads 45 of plunger 15 so as to form a better gripping surface for the plunger.

The head portion 40 of the locking plunger 15 defines a blind bore 48 offset from the center of the plunger. The key 16 includes a projection 49 of a size slightly smaller than the blind bore 48 which fits into the blind bore. The key also includes a cylindrical shank 50, a pin or projection 51 extending radially outwardly from the shank 50 adjacent one end thereof and the finger tab 52 projecting axially away from the shank 50 at the other end thereof. The pin 51 is adapted to ride in slot 35 of the plunger guide cylinder 13. Of course, since the axially extending portion 350 of the slot 35 opens outwardly of the guide cylinder 13, the key 16 can be selectively withdrawn from the guide cylinder 13.

Referring now to FIGS. 6 and 7, wherein a modified form of the invention is shown, a sleeve or outer cylinder 60 is arranged to be inserted into the aperture 25 of the upper rail of the lower sash. The sleeve 60 includes a radially inwardly extending flange 61 at its inner end and a radially outwardly extending flange 62 at its outer end. A plunger guide cylinder 63 of an outside diameter slightly smaller than the inside diameter of sleeve 60 is arranged to be received within the sleeve 60. The plunger guide cylinder 63 is cylindrical and formed in two sectrons, bearing section 63a and index section 63b, which, when assembled in abutting relationship, define an g-shiaged slot 64 similar to slot 34 of plunger gui e cylin- A locking plunger 65, similar to locking plunger 15 of FIG. 1 1s sized and shaped to be received within the plunger guide cylinder 63. The locking plunger includes a head portion 66, body portion 68, and locking element 69. The head portion 66 has an outside diameter slightly smaller than the inside diameter of plunger guide cylinder 63 while body portion 68 is of a smaller diameter. Coil spnng 70 is positioned within the plunger guide cylinder 63, one of its ends bearing against the radially inwardly extending flange 61 of the sleeve 60 and the other of its ends bearing against the head portion 66 of plunger 65. Spring 70 occupies the space defined between body portion 68 of plunger 65 and guide cylinder 63 and acts to center plunger 65 in guide cylinder 63 and forms a bearing surface for plunger 65.

A disc 71 of a diameter slightly smaller than the inside diameter of sleeve 60 and defining a slot 73 therein is positioned within sleeve 60, abutting plunger guide cylinder 63 and locking plunger 65. A positioning cap or bezel 72 abuts the end of sleeve 60 and includes an annular, axially extending flange 74 disposed about the radially outwardly extending flange 62 of sleeve 60. The positioning cap 72 is rigidly connected to the sleeve 60 by tabs 75 struck from flange 74 of the positioning cap 72; tabs 75 being bent inwardly to positively lock the flange 62 of sleeve 60 within the positioning cap 72. Tabs 75 are located at spaced intervals around the circumference of the positioning cap 72 and the portion of the flange 74 remaining after the tabs 70 have been struck therefrom constitute positioning spikes 76.

Positioning cap or bezel 72 is centrally apertured at 78, as shown in FIG. 8, and the internal surface of the aperture 78 includes a bight 79.

Key 80 is constructed to be inserted through the positioning cap 72 in order to operate the plunger 65. The key 80 includes a shank 81, web 82, and pin 83. The head portion 66 of the plunger 65 includes a web cavity 84 of a size and shape corresponding to the web 82 of the key 80 and a pin cavity 85 of a size and shape corresponding to pin 83 of key 80. Head portion 66 of plunger 65 also includes a projection 67, similar to projection 44 of the plunger shown in FIG. 1, which is adapted to ride through the L-shaped slot 64 of plunger guide cylinder 63.

The bearing section 63a and index section 63b of the plunger guide cylinder 63 are fitted together and maintained in fixed relationship with each other by means of the tongue 88 of the index section 63b extending into slot 89 of bearing section 83a. Bearing section 63a is maintained in fixed relationship with sleeve 60 by means of tongue 90 of bearing section 63a extending through bight 91 defined in the inner perimeter of inwardly extending flange 61.

Operation The lock of FIGS. 1-5 is inserted in the sashes of the window by first closing the window so that the upper rail 26 of the inside sash and lower rail 21 of the outside sash are in their desired position, in alignment with each other. The aperture 25 is bored in the upper rail 26 by a drill of conventional design and the aperture 20 is bored in a similar manner, with the bit of the drill extending through the aperture 25 so that the apertures 20 and 25 are in perfect alignment with each other. Of course, the aperture 20 is not a through bore (FIG. 2) while aperture 25 extends through the upper rail 26. The cylinder 11 is inserted into the aperture 20 by tapping from a hammer, or like instrument. The locking elements 19 prevent the cylinder 11 from being removed from its aperture 20 or rotated therein. The sleeve 12 is partially collapsed and at least partially inserted into the aperture 25. The plunger guide cylinder 13, spring 14 and locking plunger 15, having been previously assembled with each other, are then inserted within the sleeve 12 so that the small projection 32 of the cylinder 13 extends through the alignment port 31 of the sleeve 12. The cylinder 13 and sleeve 12 are then tapped into the aperture 25 until the flange 36 of the cylinder 13 prevents further movement of the plunger guide cylinder 13 into the aperture 25. With this arrangement, the sleeve 12 surrounding the cylinder 13 provides a smooth surface in the vicinity of the slots 34 and 35 so that the pins 44 and 51 of the plunger and key can slide through the slots 34 and 35, respectively, without encountering any loose wood or rough surfaces of the interior surface of the aperture 25.

Key 16 is normally retained in the plunger guide cylinder 13 by its pin 51 extending through the axially extending portion 35a of the slot 35. When the key 16 is in this position, its projection 49 is received in the blind bore 48 of the plunger 15. When it is desired to lock the window sashes together, the key 16 is urged inwardly of the plunger guide cylinder 13 until the pins 44 and 51 of the plunger 15 and key 16, respectively, reach the circumferentially extending portions 34b and 35b of the slots 34 and 35, respectively. Key 16 is then turned or rotated within the plunger guide cylinder 13, which tends to turn the locking plunger 15 an equal amount because of the offset of the projection 49 and its blind bore 48 of the key and plunger, respectively. When the key 16 1s turned in this manner, so that the pins 44 and 51 are received in the circumterentially extending portions of the slots, the spring 14 will not be able to urge the plunger and key outwardly of the guide cylinder 13.

The inward movement of the plunger 15 compresses spring 14 and causes locking element 42 to be projected outwardly of the cylinder 13, into the outside sash cylinder 11. Since the flat wedge surface 46 of the locking element 42 is tapered, movement of the locking element 42 into the cylinder 11 will cause surface 46 to engage the flat surface 18a of the semi-circular opening 18 if the lower rail 21 of the outside sash 22 is not in alignment with the upper rail 26 of the inside sash 28. When the key 16 is rotated, the locking element 42 tends to ride around the inside surface of the cylinder 11 until it engages the flat surface 18a of the semi-circular opening 18. At this point, the threads 45 of the locking element 42 engage the flat surface 18a of the cylinder 11 to urge the outside sash upwardly with respect to the inside sash. Further rotation of the locking element 42 causes the threads 45 to pull the cylinder 11 and the outside sash 22 toward the inside sash 28. Spring 14, in its compressed state, forms a bearing surface for body portion 41 and head portion 40 of plunger 15, whereby no play or lost motion will be encountered between the elements of the lock 10 or sashes of the window.

If it is desired to remove the key 16 from the lock, the key is rotated until its pin 51 is received in the axially extending portion 350 of the slot 35, whereupon the key can be withdrawn from the guide cylinder 13. Of course, the locking plunger 15 will remain inserted inside the guide cylinder 13 and the window lock will remain in its locked position. Since the locking plunger 15 will be in a position so that its head portion 40 is located near the central portion of the plunger guide cylinder 13, it will be virtually impossible for a person to rotate the plunger 15 to withdraw the locking element 42 from outside sash cylinder 11.

Referring to FIGS. 6-9 of the drawing, the modified form of the invention operates in a manner similar to the invention shown in FIGS. l-S. The apertures 20 and 25 of the sashes are bored as previously described and the outside sash cylinder 11 inserted. The elements retained in the bore of the inside sash are completely assembled, as is shown in FIG. 7, and inserted within bore 25 by tapping with a hammer, or like instrument. When the elements are received within the bore 25 of the inside sash 26, the positioning spikes 76 will gouge into the wood of the sash to rigidly position the elements within the aperture 25 of the sash.

Key is inserted through the opening 78 of the positioning cap so that its web 82 extends through the bight 79 of the positioning cap 72. The shank 81 of the key 80 extends through the positioning cap and the slot 73 of the slotted disc 71 and the web 82 of the key is received in the web cavity 84 of the head portion 66 of the locking plunger 65, while pin 83 is received in the pin cavity 85. As the key 80 is further inserted into the sleeve 60, the plunger 65 is moved against the bias of its spring 70; the projection 67 of the plunger 65 riding in the axially ex tending portion of the slot 64 of the plunger guide cylinder 63. When the projection 67 reaches the circumferentially extending portion of the slot 64, the key 80 can be turned and the projection 67 will ride through the circumferentially extending portion of the slot 64. Of course, inward movement of the plunger 65 causes its locking element 69 to function as previously described. If it is desired to remove the key 80 from the lock when the sashes are locked together, the key may be moved away from the lunger 65, rotated until its web 82 mates with the bight 79 of the positioning cap 72, and withdrawn from the window lock. Of course, in order to unlock the sashes the key 80 is reinserted through the positioning cap 72, rotated until its web 82 and pin 83 engages the corresponding

cavities

84 and 85 of the plunger 65, whereupon the key and plunger are rotated until the projection 67 of the plunger rides through the axially extending portion of the slot 64 of the plunger guide cylinder 63.

If it is decided to leave the key 80 inside the lock when the sashes are not locked together, the key 80, plunger 65, plunger guide cylinder 63 and slotted disc 71 can be rotated so that the web 82 of the key is not aligned with the bight 79 of the positioning cap 72, whereupon the positioning ca-p prevents the key from being withdrawn from the lock.

At this point, it should be understood that the window lock disclosed herein tends to align and tighten the center rails of a window to insure that any weather stripping between the center rails is effective for a positive weather seal. Since spring 14 insures that the locking plunger 15 is totally disposed within the plunger guide cylinder 13, the elements of the window lock 10 are completely enclosed within the confines of the center rails of the window when the lock is in its unlocked position. This feature makes the lock eye appealing, prevents any inadvertent scarring of the wood of the window sash, presents no dust trap on the upper surfaces of the center rails, and provides no working surfaces subject to being painted which would otherwise impair the function of the lock. Also, the security feature of the lock is especially desirable since the lock can be engaged and the key removed so that the window cannot be opened either from the outside or the inside of the dwelling. However, as explained above, the key can be retained in the lock when in its unlocked position, if desired.

While lock 10 has been illustrated as being positioned within the center rails of a window, it should be understood that the lock may be positioned in a side or vertical rail of the window and several strikes or outside sash cylinders 11 be inserted at spaced distances along the vertical rail of the outside sash so that the Window can be locked in various opened positions. Furthermore, the lock may be utilized with various other arrangements: i.e., sliding doors, or any structure having at least one slidable panel juxtaposed either another slidable panel or a stationary structure.

The use of the locks disclosed herein is not limited to wooden structure. The locks have been successfully used with aluminum and plastic structure, and it is anticipated that they can be utilized with various other materials. Of course, other attachment means, such as external screw threads, may be used in place of locking elements 19, 24 and 29 of cylinders 11 and 12, or positioning spikes 76 of bezel 72. The configuration of these elements will be determined by the structure with which the lock is to be used.

It will be obvious to those skilled in the art that many variations may be made in the embodiments chosen for the purpose of illustrating the present invention without departing from the scope thereof.

What is claimed as invention is:

1. The combination of a window lock and key wherein said lock comprises:

a tubular member defining a semi-circular opening,

a second tubular member including an outwardly extending flange means at one end and an inwardly extending flange means at its other end, an L-shaped slot formed in said second tubular member and including a portion extending axially of said second tubular member and a portion extending circumferentially of said second tubular member, a U-shaped slot formed in said second tubular member having one leg disposed adjacent to and parallel to said axially extending portion of said L-shaped slot and its base portion disposed adjacent to and parallel to said circumferentially extending portion of said L-shaped slot.

spring means disposed in said second tubular member and abutting said inwardly extending flange means,

plunger means telescopically and rotatably received within said second tubular member against the bias of said spring means and including a projecting means extending through said L-shaped slot and a locking element adpated to engage said semi-circular opening, and

said key including projecting means extending through said U-shaped slot.

2. The combination of a window lock and key wherein said lock comprises:

a first tubular member defining a semi-circular opening in one of its ends for placement in the center rail of the outside sash of a window,

a second tubular member for placement in the center rail of the outside sash of a window in alignment with said first tubular member and including an inwardly extending flange means at one of its ends for juxtaposition with the semi-circular opening of said first tubular member and an outwardly extending flange means at its other end,

a cylindrical sleeve coaxially positioned within said second tubular member and defining an L-shaped slot in its sidewall,

a plunger telescopically received within said cylindrical sleeve and including a projection extending at least partially through said L-shaped slot,

biasing means disposed between the inwardly extending flange means of said second tubular member and said plunger to urge said plunger away from said first tubular member, and

a positioning cap connected to the outwardly extending flange means of said second tubular member for maintaining said plunger within said cylindrical sleeve.

3. The invention of claim 2 and further including a slotted disc disposed between said positioning cap and said plunger.

4. The invention of claim 2 wherein said plunger includes at its end adjacent said first tubular member a locking element of smaller diameter than the largest diameter of said plunger and eccentrically mounted thereon, and defines at its other end a detent offset from its centerline.

5. A lock bolt comprising:

a head portion of circular cross sectional configuration two indentations defined in a first end of said portion, one indentation being a slot and the second being a bore,

an elongated body portion of circular cross sectional configuration coaxially connected to said head portion, said body portion being smaller in diameter than said head portion and defining an annular exterior surface,

an elongated locking projection of smaller cross sectional area than said body portion eccentrically connected to the end of said body portion remote from said head portion, said locking projection defining an elongated convex surface of smaller radius than said body portion in tangential relationship with said annular exterior surface of said body portion and a substanially flat surface sloping outwardly from the central portion of said body portion toward said convex surafce, said convex surface including a series of angled threads.

6. The invention of claim 5 wherein said head portion includes a projection extending in a radial direction therefrom.

7. Locking apparatus comprising at least one locking cylinder for placement in a first window sash,

a protective sleeve for placement in an adjacent window sash including an internally extending flange at a first end and an externally extending flange at a second end,

a plunger guide sleeve telescopically received within said protective sleeve,

spring means telescopically received Within said said protective sleeve,

a lock bolt telescopically received within said plunger guide sleeve and including an enlarged head portion and a locking projection, said spring biasing said lock bolt in a first direction.

bezel means attached to said externally extending flange of the protective sleeve to enclose said plunger guide sleeve, spring means and lock bolt Within the protective sleeve.

8. The invention of claim 7 wherein said plunger guide sleeve comprises a bearing section surrounding at least a portion of said spring means and an index section surrounding said enlarged head portion of the lock bolt, said bearing section defining a groove and said index section including a tongue extending into said groove, said plunger guide sleeve defining an L-shaped slot, and said enlarged head portion of the lock bolt including a projection extending through said slot.

9. The invention of claim 7 wherein said bezel includes a series of tabs folded around said externally extending flange of the protective sleeve, and positioning spikes dispersed intermediate said tabs.

10. The invention of claim 7 and further including a slotted disc positioned between the bezel and said head portion of the lock bolt.

11. The invention of claim 7 wherein said bezel is centrally apertured and a bight is defined in the perimeter of the central aperture.

12. A locking device for selectively precluding relative movement between the sashes of a Window comprising:

a locking cylinder received in one of said sashes and defining an opening therein facing said other sash;

a sleeve assembly received through said other sash and in selective alignment with said opening in said locking cylinder;

a locking bolt telescopically received within said sleeve assembly and including an enlarged head portion slidably positionable within said sleeve assembly, a body portion having a diameter smaller than said head portion integral with said head portion at one end thereof, and a locking projection integral with the opposite end of said body portion, said locking bolt positioned in said sleeve assembly so that said locking projection extends toward said locking cylinder and is selectively extendable into said locking cylinder to fix said sashes against relative movement by each other:

a coil spring slidably received in said sleeve assembly around said body portion of said bolt and engaging said head of said bolt, said sleeve assembly including a stop member at that end of said sleeve assembly facing said locking cylinder for engaging said spring and causing said spring to urge said bolt ant said locking projection away from said locking cylinder;

said sleeve assembly defining an L-shaped slot therei1 including a first portion extending axially of sai( sleeve assembly and a second portion communicat ing with said first portion and extending circurnfcr entially of said sleeve assembly, and said bolt in cluding a guide projection slidably extending'througl said slot, said slot, said guide projection and saii bolt constructed and arranged to cause said locking projection of said bolt to extend into locking en gagement with said locking cylinder when said guide projection is positioned in said second portion 0: said slot and to permit said locking projection to be retracted from said locking cylinder when said guide projection is positioned in said first portion of saie slot;

21 key rotatably received in said sleeve assembly ant including a driving projection and a retaining pro jection, said head of said bolt defining a driving recess therein complementary shaped to said driving projection for receiving said driving projection 01 said key to selectively slide said bolt along said sleeve assembly toward said locking cylinder and rotate said bolt, and said cylinder assembly defining a re taining slot therein for receiving said retaining projection of said key to retain said key in said sleeve when said guide projection of said bolt is positioner in said first portion of said L-shaped slot, said re taining slot including an opening through said sleeve assembly in alignment with said retaining projection of said key when said guide projection of saic' bolt is in a predetermined position in said second portion of said L-shaped slot to allow said key tc be removed from said sleeve assembly.

References Cited UNITED STATES PATENTS 1,300,275 4/1919 Johnson 81-9( 2,098,189 11/1937 Kistner --9( 2,716,038 8/1955 Sa-Wyer 29262 2,845,789 8/1958 Kisner 709( 3,006,178 10/1961 Rifkin 70-9( 3,203,718 8/1965 Bishop 29262 1,958,950 5/1934 Lemieux 292340 X 2,350,346 6/1944 Gaskell -47 RICHARD E. MOORE, Primary Examiner E. I. MCCARTHY, Assistant Examiner US. Cl. X.R. 292-62