US2926515A

US2926515A - Lock for swinging window

Info

Publication number: US2926515A
Application number: US609562A
Authority: US
Inventors: Andrew T Hagerty
Original assignee: Adlake Co
Current assignee: Adlake Co
Priority date: 1956-09-13
Filing date: 1956-09-13
Publication date: 1960-03-01
Anticipated expiration: 1977-03-01

Description

March 1, 1960 A. T. I-IIAGERTY 2,926,515

LOCK FOR swmcmc wmnow Filed Sept. 13, 1956 s Sheets-Sheet 1 TIIAIIIIIIIIIIIIIIIA II/I/I/I/I/I/J INVENTOR.

March 1, 1960 A. T. HAGERTY 2,926,515

' LOOK FOR SWINGING wmnow Filed Sept. 13, 1956 3 Sheets-Sheet 2 & I- ////////A INVENTOR.

6/ a vii/1mg. BY Z mmvwwm 7% March 1, 1960 A. T. HAGERTY LOCK FOR swmcmc wmoow 3 Sheets-Sheet 3 Filed Sept. 13, 1956 INVENTOR.

LOCK FOR swmcmc wmnow Andrew T. Hagerty, Elkhart, Ind.., assignor to The Adlake Company, Elkhart, Ind., a corporation of Illinois Application September 13, 1956, Serial No. 609,562

' 16 Claims. (Cl. 70-89) This invention relates to window constructions and is more particularly concerned with improvements in a lock structure for retaining a swinging window in closed condition.

It is a general object of the invention to provide a latch or lock structure for use on a swinging or hinged type window which is of relatively simple yet sturdy construc tion, which is highly efiicient in operation, which may be easily installed on the window, and which will withstand considerable abuse without requiring repair or replacement.

It is a more specific object of the invention to provide a latch structure for a swinging window of the type which is hingedly or pivotally mounted along one edge thereof in a frame which surrounds the same when it is in closed condition, which latch structure is hidden in the clearance space between the edge of the sash and the edge of the frame opposite the hinged connection of the sash with the frame, with an operating handle being provided on the latch which projects inwardly of the sash where it is accessible for manual operation to release the latch when it is desired to open the window.

It is a further object of the invention to provide a latch mechanism which is adapted to be incorporated in a swinging sash for locking the sash in the closed condition relative to the frame in which the sash is mounted, which latch mechanism is concealed between the edge of the sash and the edge of the frame and which is provided with a key operated locking device adapted to secure the latch against opening movement and prevent unauthorized operation of the mechanism.

These and other objects and advantages of the invention will be apparent from a consideration of the window lock structures which are shown by way of illustration in the accompanying drawings wherein:

Fig. 1 is a perspective view of an upwardly swinging ventilator type window with the ventilator sash having associated therewith a latch and lock mechanism which embodies the principles of the invention;

Fig. 2 is an elevation of the window with the ventilator sash in the closed position relative to the supporting frame;

Fig. 3 is a vertical section, to an enlarged scale, taken on the line 3-3 of Fig. 1;

Fig. 4 is a view taken on the line 4-4 of'Fig. 3 showing the striker plate forthe latch mechanism;

Fig. 5 is a View taken on the line 5-5 of Fig. 3, to an enlarged scale, showing the latch and associated lock mechanisms;

' Fig. 6 is a view taken on the line 6-6 of Fig. 5;

Fig. 7 is a cross section taken on the line 7-7 of Fig. 5;

Fig. 8 is a cross section taken on the line 8-8 of Fig. 7;

Fig. 9 is a perspective view of a lock element;

Fig. 10 is a perspective view of the key for the lock mechanism;

2,926,515 l atented Mar. 1, 1960 Fig. 11 is a cross section taken on line 11-11 of Fig. 10 to an enlarged scale;

Fig. 12 is a perspective view of an outwardly swinging ventilator type window with the ventilator sash having incorporated therein a modified form of the latch mechamsm;

Fig. 13 is a cross section, on an enlarged scale, taken on the line 13-13 of Fig. 11;

Fig. 14 is a cross sectional view to a still larger scale, taken on the line 14-14 of Fig. 13;

Fig. 15 is a perspective view of the latch plate on the fixed frame; and

Figs. 16 and 17 are perspective views of the principal elements of the latch mechanism, with the latch element in Fig. 17 shown in inverted position.

Referring to Figs. 1 to 11 of the drawings, there is illustrated a portion of a multi-section window having an outer stationary frame 10 of generally rectangular form, which frame is adapted to be anchored and sealed in any suitable manner in an opening in the wall of a building. The frame 10 includes side rails 11, a bottom rail 12, and a vertically spaced cross rail 13 defining a lower rectangular opening which is adapted to receive the ventilator sash 14. The

frame members

11, 12 and 13 surround and fit closely about the frame members 15 of the glazed sash 14 which is of the same general rectangular form. The

rail members

11, 12 and 13 of the frame 10 and the rail members 15 of the sash 14 are both preferably constructed of extruded aluminum but either or both may be constructed of any other suitable material.

The bottom rail member of the sash 14 is connected by the hinge 16 (Fig. 3) with an inner vertical flange forming portion 17 of the bottom rail 12 of the frame 10, for inward swinging movement of the sash 14. The rail members 15 of the sash 14 are provided with a continuous recess or groove 18 on the inner face of an inner peripheral flange forming portion 19 which receives a compressible weather strip or sealing member 20, the latter engaging against the inner face of the side rails 11 and

cross rails

12 and 13 of the outer fixed frame 10 when the sash are provided adjacent the outer edge of the base plate 12 and a slot or recess 26 extends inwardly from a point between the bearing cars 25 with a widened portion 27 opening at the innermost edge of the plate 22. The bearing ears 25 carry a cross pivot pin 28 which is secured to the inner end of a latch operating arm 29. The latch arm 29 includes a bar portion 30 which is of generally rectangular cross section and a handle forming portion 31. The bar portion 30 extends from the pivot pin 28 through an elongate rectangular slot 32 provided in the front flange portion 19 of the top rail 15 of the sash 14 and handle forming portion or cross piece 31 projects inwardly of the sash frame member 15 and is adapted to be gripped for manual swinging of the latch arm 29 about the pivot 28. A pair of latch elements 33 formed by a plate bent into U-shape with a connecting web 34 are arranged astraddle of the latch arm portion 30 so that the upper edges of the plate elements 33' extend above the top of the bar portion 30 while the bottom cross web 34 extends beneath the bar portion' 36 of the operating arm 29. The upper edges of the plate elements 33 are notched at 35 and these elements are normally urged in the upward direction by a torsion spring 36 having U-shaped central portion which engages beneath the web 3 and end sections 37 which engage with the web portion of the sash rail 15 within the recess or slot 27 in the base plate 22. The latch plate elements 33 have an uppermost cam forming edge 38 which tapers inwardly above the top edge of the bar portion 30 of the operating arm 29 and which is adapted to engage with a striker plate 40 adjustably secured by screws 41 to the lower face 42 of the cross rail or mullion 13 of the fixed frame 10. The striker plate 49 an embossment or raised portion 43 providing along 1*; outer edge a cross abutment 44 facing outwardly so that in the closed position, as illustrated in Fig. 3, the abutment 44 engages in the recesses formed by the notches 35 in the latch plate elements 33.

The latch mechanism 21 has associated therewith a locking mechanism t) which may be operated to hold the operating arm 29 against swinging movement. The locking mechanism 50 is arranged adjacent the latch mechanism 21 (Figs. 5 to 11) and is supported on the web portion 23 of the top sash frame member 15. The lock mechanism 563 comprises a pair of confronting

block members

51 and 52 which are secured together by bolts or screws 53 and which are notched on their confronting faces at 54 and 55 to provide an internal recess or compartment for receiving therein a tumbler member 56 (Fig. 9). The barrel-like tumbler 56 has hub formations 57 projecting from opposite end faces thereof which are rotatably received in bearing forming recesses 58 in the

block members

51 and 52 to rotatably mount the tumbler 56 between the

block members

51 and 52, the latter forming a housing for the same. The turn bler 56 has an arm forming portion 59 which is provided with an external slot 60 which extends in a generally radial direction relative to the axis of rotation of the tumbler 56 and opens outwardly thereof. The turnbler 56 is also provided with an internal axially extending slot 61 which opens inwardly of the bore 62 therein. A latch plate 63 is provided for the tumbler 56 which is mounted on a spring plate 64, with the latter being secured in a recess 65 in the outer face of theblock 51 and being anchored at one end by one of the set screws 53. The plate 63 extends through a slot 66 in the wall of the block 51 and is positioned to engage in the end of the axial slot 61 in the tumbler 56 to hold the latter in one position thereof. The external slot 69 in the turnbler 56 receives an arm 67 (Figs. 5 to 8) which extends laterally from a slidably mounted lock plate 68, the latter having a flange forming end extension 69, which is notched at '70, and which is positioned for sliding movement in a vertical plane and across the aperture 32 in the flange 19 of the sash frame member 14 beneath the latch arm 29. The top plate portion 71 of the lock slide plate 68 is slidably received in a recess 72 extending longitudinally in the top of the block 52 at the inner edge thereof. The lock plate 68 is held in the recess 72 by a small strap-like spring 73 which has bent end portions 74 seated in slots 75 in an angular cover plate 76 which is secured by screws 76 on the top faces of the

blocks

51 and 52 and the outer side face of block 51. The cover plate 76 is apertured at 77 to accommodate the radially extending arm portion 59 of the tumbler 56 as it is moved to and from the locking position by rotation of the tumbler 56.

A key 80 is provided for operating the tumbler 56. The key comprises a stem portion 81 and a cross piece 82 forming a handle at one end thereof. The stem 81 is slotted at 83 to receive a narrow spring plate member 84 which is anchored at one end and has a bent portion 85 adjacent the free end which extends through a slot 86 in the wall of the stem 81. The spring plate 84 is held in operative position by any convenient means such as preening the end portion 87 of the slot 83. The stem 81 of the key 80 is of sufiicient length to engage with the holding plate 63 when it is fully inserted in the bore 62 of the tumbler 56. M

In operating the mechanism, the sash 14 is latched upon being swung to the closed position by the latch plates 33 automatically engaging with the striker plate 40 under the influence of the torsion spring member 36. To release the sash for opening movement the latch plates 33 may be moved out of engagement with the striker plate 40 by pulling downwardly on the handle 31 of the latch arm 29. To prevent operation of the latch arm 29 the locking mechanism 50 may be actuated by the key 80. The key is applied to the lock 50 by inserting the stem 81 through the aligned

apertures

88 and 89 in the block 52 and the wall 17 of the frame mem ber 15. Upon insertion of the stem 81 of the key 80 in the bore 62 of the tumbler 56, the stem 81 may be rotated to engage the projecting portion of the spring 84 in the internal slot 61 of the tumbler 56 for rotating the tumbler 56 in a counterclockwise direction which moves the sliding lock plate 63 to position the end 69 thereof beneath the latch arm 29 as illustrated in Figs. 5 to 8. As the tumbler 56 moves about its axis to the locking position the holding plate 63 will be urged by the spring 64 into the outer end of the internal slot 61. In order to release the latch plate 63 and permit rotation of the tumbler 56 it is necessary to push the key 80 inwardly and force the latch plate 63 out of the slot 61 against the force of the spring 64, whereupon the tumbler 56 may be turned or rotated in the clockwise direc tion to withdraw the sliding lock plate 68 from engagement beneath the arm 29 and permit swinging movement of the latter to unlatch the sash 14.

A modified form of the latch mechanism is illustrated in Figs. 12 to 16 which is incorporated in an outwardly swinging sash 90. The sash 90 is mounted in a fixed frame 91 having side rails 92, a top rail 93 and an intermediate cross rail or mullion 94- which defines a generally rectangular opening within which the sash 90 is hingedly mounted. The rail members 95 of the sash 90 are generally rectangular in form and the sash 90 is connected by a hinge 96 with an outer flange forming portion 97 of the top cross rail 95. The latch mechanism 98 is mounted on the bottom forming rail 95 of the sash 91.

The latch mechanism 98 comprises a base plate 100 (Figs. 13 and 14) which is secured to the sash frame member 95 by screws 101 and which is provided with depending laterally spaced bearing forming ears 102 adjacent the outermost edge thereof for receiving a cross pivot pin 103. The pivot pin 103 is carried on the end of a horizontal portion 104 of a latch arm 105, the latter having a vertically extending portion 106 which projects through an aperture 107 in web portion 108 of the frame member 95 and through an aperture 109 in the channel-shaped glazing strip 110. The vertical leg 106 terminates at the end of a handle 111 which is provided for manual operation of the latch arm 105, and which has an aperture 112 for receiving the hook portion on an operating pole (not shown), when the vent or sash 90 is located at a high elevation beyond the normal reach of the operator. A bent plate 113 is associated with the horizontal portion 104 of the latch arm which has side arms or latch plate elements 114 connected by a cross web 115, the latter extending beneath the horizontal arm portion 104, and the ends of the side arms 114 being pivotally mounted on the pivot pin 103. The opposite ends of the latch plate elements 114 have depending abutment ledge forming portions 116. The U-shaped plate 113 straddles the arm portion 104 and is urged in a clockwise direction about the pivot pin 103 by a torsion spring 117 having a U-shaped portion with the bight 118 thereof extending beneath the latch plate 113 and the arm portion 104. The spring 117 has its end portions 119 terminating in a cut out portion orrecess 120 of the base plate 100. The abutment ledges 116 on the latch plate elements 11 4-are 1 rounded or beveled at their inner ends at 121 for engaging with the upper surface 122 of a striker plate 123 which is mounted on the cross member 94 of the fixed frame 91 and which has an abutment ledge 124 at the end of the inwardly inclined strike surface 122 for engagement with the latch plate members 116.. The striker plate 123 is adjustably mounted on the ,cross frame member by screws 125 received in slots provided in the base of the plate.

- In operating the mechanism illustrated in Figs. 12 to 17, the latch 98 catches automatically when the sash 90 is swung to the closed position. The latch plate elements 113 strike the inclined surface 122 of the striker plate 123 and ride over the same against the force of the spring 117 until the notched end portions thereof engage with the abutment shoulder 124. When it is desired to open the sash all that is required is to raise the handle 111 and lift the latch elements 113 free of engagement with the striker plate. 123 so that the sash is free to swing outwardly as illustrated in dotted lines in Fig. 12.

I claim:

l. A latch for a swinging window of'the type which comprises a sash frame pivoted along an edge thereof to an edge of a supporting framewhich surrounds the same when the sash is closed with the sash frame and the supporting frame having spaced confronting surfaces at the edge opposite the pivot, said latch comprising a base plate mounted on the surface of the sash frame, a latch arm pivoted at one end on the base plate and having an operating handle formation on the other end which projects inwardly of the sash frame, cam plates associated with the latch arm, said cam plates having one end pivoted on the base plate for movement about the same axis as the latch arm said cam plates havingcam forming edges extending along the latch arm in the direction of said handle formation and terminating in an abutment formation at the other end, a spring mounted on the base plate and positioned to urge the cam plates and the latch arm in a direction to swing the same outwardly of the sash toward the opposed surface on the supporting frame, said cam forming edges being urged by said spring to a position relative to the latch arm where they project outwardly of the surface of the latch arm and a striker plate mounted on the opposed surface of the supporting frame in the path of movement of the cam forming edges of the cam plates when the sash is moved toward the closed position, which striker plate has an abutment for engaging in latching relation with the abutment on said cam plates when the sash is closed. 4

2. A latch for a swinging window of the type which comprises a sash frame pivoted along an edge thereof to an edge of a supporting frame which surrounds the same when the sash is closed with the sash frame and the supporting frame having spaced confronting surfaces at the edge opposite the pivot, said latch comprising a base plate mounted on the surface of the sash frame, a latch arm pivoted atone end on the base plate and having an operating handle formed on the other end thereof which projects inwardly:of the sash frame, stop means for limiting the outward swinging movement of the latch arm, cam plates positioned alongside of the latch' arm and having one end pivoted on the base plate for move-,

ment about the same axis as thelatch arm, each cam plate having a cam surface extending along the latch arm in the direction of said operating handle and terminating in a lateral abutment'forming edge which faces in the direction of the pivoted end thereof, 'a-spring mounted on the base plate and positioned to engage the cam plate and urge the same in a direction outwardly of the sash frame toward the oppositely disposed surface on the sup-- porting frame, said camrplate and said latch arni' having interengaging portions which are arranged so that swinging movement of-the latch arm toward thesash frame moves the cam plate in the same direction or the cam plate may be swung independently for movement in the opposite direction against the operation of said spring, and a striker plate mounted on the opposed surface of the supporting frame for cooperation with said cam plate, which striker plate has an abutment for engaging in latching relation with the abutment edge of said cam plate when the sash is closed.

3. A latch device for a swinging window of the type which comprises a sash frame pivoted along an edge thereof to an edge of a supporting frame which surrounds the same when the sash is closed with the sash frame and the supporting frame having spaced confronting surfaces at the edge opposite the pivot, said latch device comprising a base plate mounted on the surface of the sash frame, a latch arm pivoted at one end on the base plate and having the other end projecting inwardly of the sash frame, said sash frame having an apertured flange for receiving the latch arm with the aperture of a size sufficient to permit limited swinging movement thereof toward the opposed surface on the supporting frame, cam plates having one end pivoted on the base plate for movement about the same axis as the latch arm, said cam plates being arranged to extend along opposite sides of said latch arm and having cam surfaces terminating in a transverse abutment forming edge at the other end, said cam surfaces normally projecting beyond the outermost surface of said latch arm, a spring mounted on the base plate and urging the cam plates and the latch arm in a direction to swing the same outwardly of the sash frame, means extending between the cam plates and normally urged by said spring into engagement with said latch arm, said cam plates being movable in the opposite direction against the action of said spring, and a striker plate mounted on the opposed surface of the supporting frame in the path of movement of the projecting cam surfaces When the sash is swung toward the closed position and having an abutment for latching engagement with the abutment edges of said cam plates when the sash is fully closed.

4. A latch device as recited in claim 3, and a lock plate mounted on the sash frame adjacent said latch arm and having a portion which is slidable over a portion of the aperture in the flange of the sash frame to lock the latch arm against swinging movement.

5. A latch device as recited in claim 3, and a lock plate slidably mounted on the sash frame adjacent the latch arm, said lock plate having a portion adapted to be projected into engagement with the latch arm to lock the same against swinging movement, and a key member for operating the lock plate.

6. A latch structure for a swinging window which is characterized by a generally rectangular sash frame pivotally connected along one edge in a supporting frame which surrounds the sash when the latter is in closed position, said sash frame and said supporting frame having confronting edge portions opposite the pivotal connection, said latch structure comprising a base plate mounted on the edge of the frame of the sash which is opposite the pivotal connection, said base plate being in a plane normal to the face ofthe sash frame, a pivot mounted between a pair of bearing ears extending outwardly at one side of the base plate, a latch arm swing-v ably mounted at one end on said pivot and having the opposite end extending through an elongate aperture provided in the face of the sash frame and forming a handle therefor, plate-like latch elements positioned along opposite sides of the latch arm and mounted on said pivot to swing with said arm, said latch arm and said plate-like elements extending in the same direction from said pivot,

said plate-like elements having laterally extending abutment formations thereon at the ends opposite the pivot, and cam surfaces adjacent the abutment formations," which in one position extend outwardly of'the latch arm,

spring means urging the plate-like elements and the latch arm in the direction outwardly of the frame of the sash, said latch arm having its outward movement limited by engagement of the handle end in the aperture in the sash frame, and a cooperating striker plate on an opposed edge portion of the supporting frame, which striker plate has a beveled portion terminating at a laterally extending abutment ledge for engaging with the cam surfaces and the abutment formations on the plate-like elements when the sash is hinged to a closed position to swing the plate-like elements inwardly and then outwardly for latching engagement with the striker plate.

7. A latch structure for a swinging window which is characterized by a generally rectangular sash frame pivotally connected along one edge in a supporting frame which surrounds the sash when the latter is in closed position, said frames having spaced confronting surfaces at the edge opposite the pivotal connection when the sash is closed with the sash frame having an outwardly proiecting inner flange provided with an elongate aperture, said latch structure comprising a base plate mounted on the edge of the frame of the sash in the space between said confronting surfaces, bearing ears on the base plate having a pivot extending between the same, a latch arm mounted at one end on the pivot and having the opposite handle forming end extending through the aperture provided in the inner flange on the sash frame, a bent plate the U-shaped cross section straddling the latch arm with the side leg portions positioned along opposite sides of the latch arm and with the one end mounted on said pivot to swing with said latch arm in the inward direction of movement thereof, said side leg portions having cam forming edges extending in a direction radially of the pivot and toward the handle forming end of the latch arm which terminate at lateral abutment formations, spring means urging the bent plate and the latch arm in a direction outwardly of the frame of the sash and a striker plate on the confronting surface of the supporting frame, which striker plate has a cam surface and an abutment ledge for engaging with the corresponding formations on the bent plate to move the bent plate into spring pressed locking relation with the striker plate when the sash is hinged to a closed position.

8. A device for locking a window frame which is mounted to swing into and out of an opening, said device comprising a base, plate mounted on an outwardly facing surface at the free edge of the frame, a latch arm having one end pivotally mounted on the base plate for swinging movement about an axis parallel with the axis on which the sash swings, said latch arm having a portion extending from the pivotal mounting along the surface of the edge of the frame and terminating at a handle therefor, latch plate elements extending along opposite sides of said latch arm portion toward said handle, each of said latch plate elements having one end pivotally mounted for swinging movement about the same axis as the latch arm, said latch plate elements having cam forming edges each terminating in an abutment formation at the free end thereof which faces toward said handle, a connecting cross Web between the latch plate lements, spring means urging the cross web against the latch arm and operative to swing the latch plate elements and the latchvarm as a unit in an outward direction about the pivotal mounting, the cam forming edges of the latch plate elements extending beyond the adjacent edge of the latch arm, and a striker plate having a cam surface terminating at a lateral abutment ledge mounted in the opening, said striker plate being positioned to engage the cam surface thereof with the cam forming edges of the latch plate elements asthe sash is swung into the opening in which it is mounted whereby to swing the latch plate elements in a direction against the force of the spring means and engage the abutment formations thereon in kicking relation with the abutment ledge on the striker p ate.

9. A lock structure-for -'a swinging window which is characterized by a generally rectangular sash frame pivotally mounted along one edge in a supporting frame which surrounds the sash when the latter is in closed position, with the sash frame having a flange on the inner edge opposite the pivotal mounting which is provided with an elongate slot extending normal to the pivorally mounted edge of the sash frame, said lock structure comprising a base plate mounted on the edge of the sash frame which is opposite the pivotal mounting, a latch arm pivotally mounted at one end on the base plate and having the opposite handle forming end extending laterally thereof through the slot provided in the flange of the sash frame whereby to limit the pivotal movement of the latch arm, latch plate elements positioned along opposite sides of the latch arm and pivotally mounted on the base plate to swing on the same axis as said latch arm, said latch plate elements extending in the direction of the handle forming end of said latch arm, said latch plate elements having lateral abutment formations thereon which face in the direction of the handle forming end of said latch arm and cam surfaces extending from the abutment formations toward the pivotal mounting therefor, spring means urging the latch plate elements and the latch arm in the same direction outwardly of the frame of the sash with the latch plate elements being free to pivot in the opposite direction against the force of said spring means, and a cooperating striker plate on an opposed edge portion of the supporting frame, which striker plate has a cam surface for engaging with the cam surfaces of the latch plate elements and a lateral abutment ledge facing in the direction outwardly of the supporting frame for engaging in locking relation with the abutment formations on the latch plate elements when the sash frame is hinged to a closed position in the supporting frame.

10. Alock structure as recited in claim 9, and a lock slide bar mounted on the sash frame adjacent the latch arm and having a portion thereof movable across the inner end portion of the slot in .the flange whereby to lock the latch arm against swinging movement in a direction to move the latch abutment formations out of engagement with the abutment ledge on the striker plate.

11. A lock structure as recited in claim 10, and a key operated rotatable cam member mounted on said sash frame and in operating engagement with said lock slide bar.

12. In a locking arrangement for securing a swinging frame against movement out of an opening in which it is mounted wherein a latching device having an operating arm is mounted on the frame with the operating arm extending through an elongate slot provided in a flanged portion of the frame, said operating arm being adapted to swing in said slot for latch opening and closing, a housing secured on the frame along the side of the slot and having a guideway forming recess, a lock slide bar having one end received in sliding relation in the guideway forming recess, said lock slide bar having the other end positioned to be projected across a portion of the slot so as to confine the operating arm between the edge ofthe lock slide bar and the end of the slot and prevent movement of the operating arm in the slot, a barrel-like cam rotatably mounted in the housing and connected with the lock slide bar, said cam being adapted upon rotation thereof to move the lock slide bar in said guidewlay recess into and out of projected position, said flanged frame portion having an aperture and a key having a stem portion adapted to extend through theaperture in the flanged frame portion and engageable within the cam to manually rotate the same. 13. A lock b ar structure for locking engagement with a swinging latch arm comprising a bar member, a housing having a .guide'way for receiving in sliding relation therein one end of the bar member, a barrel-like cam member, spaced bearing members providing a recess in which said cam member is rotatably mounted, one of said bearing members having a bore with its long axis aligned with the axis of said cam member, said cam member having internal and external axially and radially extending slots, said bar member having a laterally extending finger extending into the external slot in said cam member whereby rotation of the cam member will reciprocate the bar member into and out of locking engagement with the latch arm, and a key for manually rotating the cam member, said key having a stem of slightly less cross sectional diameter than the corresponding dimension of said one bearing member and being provided with a radially depressible peripheral projection in a portion thereof for engaging in the internal slot in the cam member when the stem is inserted in the cam member and the key is rotated to align the projection with said slot.

14. A lock bar structure as recited in claim 13, and a spring pressed latch member mounted in said housing and engageable in the internal slot at the end of said cam member to retain the cam member against further rotation when the cam member is rotated to a predetermined position, said. latch member being engageable by the end of the key when it is inserted in the cam member and being moved by said key to release the cam member for further rotation.

15. A sliding lock'bar structure comprising a housing having an internal recess and an adjoining guideway forming recess opening at one end thereof, a slide bar having one end positioned in sliding relation in said guideway forming recess and having a lateral extension on said one end which projects into said internal recess, a cylinder cam, bearing members mounting said cam in rotatable relation in said internal recess, said cam having an external slotted arm which receives said lateral 10 extension, the axis of rotation of the cam being generall normal to the direction of sliding movement of the slide bar, said cam having an internal bore provided with an inwardly opening slot which extends radially and axially therein, the bearing members at one side of said cam member having a bore which is aligned with the bore in the cam member, and a key having a stem portion with a peripheral slot and a spring pressed radial tongue therein for insertion through the bore in the bearing members and for engagement in the slotted bore of the can: to manually rotate the cam.

16. A sliding lock bar structure as recited in claim 15, and a spring mounted tongue member positioned at the inner end of the bore in the cam and arranged to engage in the inner end of the inwardly opening slot in the cam when the cam is rotated to a predetermined positionto lock the cam against rotative movement.

References Cited in the file of this patent UNITED STATES PATENTS Sweden Mar. 14,