US1730146A

US1730146A - Window latch

Info

Publication number: US1730146A
Authority: US
Inventors: Holland Henry
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-05-09
Filing date: 1925-05-09
Publication date: 1929-10-01
Anticipated expiration: 1946-10-01

Description

Oct. 1, 1929. H. HOLLAND 1,730,146

wnmow LATCH Filed May 9. 1925 2 Sheets-Sheet 1 INVENTOR} Oct. 1, 192.9. HOLLAND 1,730,146

WINDOW LATCH Filed May 9. 1925 2 Sheets-Sheet 2 IN VEN TOR.

ATTORN Patented Oct. 1, 1929 HENRY HOLLAND, OF CLEVELAND, OHIO wnvnow LATCH Application filed May 9 This invention, as indicated, relates to a window latch. More particularly it comprises a latch wherein the weight of the window is supported upon a movable latch memher, one end of which engages a rack or other suitable support upon the window frame and another part of which has direct engagement with an inner wall of the stationary member of said window latch, It also includes a construction wherein a double-ended latch member is employedflso that ,by the mere shifting of a coiled spring from one side of the device to the other the identical latch structure may be used upon either the right or left hand side of a window.

Window latches, as heretofore employed, particularly those used in railway coaches and like structures, have in most'instances included a movable latch member mounted on a pivot pin. Such devices have been found after continued use to be subject ,to heavy wear and are often rendered inoperative either through tlrebreaking of'the pivot pin or the amming or misalignment of the latch member with" respect to its associated parts.

The principal object of the present inventionis to obviate thedifficulties' referred to and provide a latch which will be simple in construction and which will receive the weight of the window upon jparts providing a large bearing surface and which will be of durable construction little subject to breakage or wear, and which will not be rendered inoperative, even if heavily used over'a very long period during which a considerable amount of wear may have taken place. Anotherobject of the invention is to eliminate the use of the pivot'pin for the movable latch member, or to provide" a'bearing additional to the pivot pin which will form the main working bearing of thedevice, the pivot pin serving merely as a convenient means for centering the operative parts when the latch is operated free of the weightof the window. Other and furtherobjects of the invention will fappearin the course'of'the following description. To the accomplishment of the foregoing and r'elated ends, said invention,

then, consists of themeans hereinafter fully 1925. Serial No. 29,099.

described and particularly pointed out in the claims.

The annexed drawings and the following description set forth in detail certainmechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings:

Fig. 1 is an elevation showing the corner of a window sash and frame with a window latch and rack applied thereto; Fig. 2' is an end view of the window latch with the rack and window frame shown insection; Fig. 3 is a sectional view taken'falongthe line 3-8 shown in Fig. 1, looking in the directionof. the arrows; Fig. 4 isa bottom plan view of the stationary part ofthe window latch; Fig. 5 isa perspective view of the movable part of the window latch 6 is a perspective view of a short section of the rack shown in Figs. 1 and 2; Fig.7 is an elevation showing a movable form of window latch applied to a window sash and co-operating with an adjacent rack; Fig. 8 is a bottom plan view of the latch shown in Fig. 7 Fig. 9' is aside elevation of the latchshown in Fig.8, as seen from the lefthand side;Fig. 10' is a sectional view 1 taken along the line 10 10 shown in Fig. 8,

looking in the directio'n of the arrows; Figs. 11 and 12 are transverse sectional views taken respectively lalong the

lines

1,1"11 and 12-12,'shown in Fig. 8, lookingin the direction of the arrows; and Figs. l3'and lt are respectively side and end elevationsshowing an inverted rack applied to the window sash and an invertedllatch of the type shown in Figs. 7 to 12 appliedto the window post or frame. l

As is clearly shown in the drawing mypreferred form of latch comprises a stationary member '1, preferably formed of a metal casting having a main body section 2 in the form of a rectangular plate, formed at either end with an extension 3 centrally apertured to re ceive a fastening element. The body portion of the device lies in a plane above that of'the end extensions inbrder to provide space beneath the same for a removable latch member 4. Apiv'ot openings is provided centrally of the body section which is adapted to receive a stud 6 formed integrally upon the upper face of said movable member.

An extension member 7, preferably is in the form of a yoke and formed integrally with said body member. The two arms of said yoke taper from the upper surface of the body member rearwardly to a point where they merge and form a base 8 upon which a finger block 9 is provided. Said finger blocl: is preferably formed integrally with said rearward extension and provides a surfaceon either side which may be engaged by the fingers of the operator when shifting the latch member. Immediately in advance of the finger block a screw-hole 11 is provided, which, with the openings in the lateral extensions of the body member, provides for the secure fastening of the stationary latch member to the window frame or other point of support.

As is ciearly shown in Fig. 4 of the drawing, the body of the latch member on its inner side is formed with a lug 15 having a cut-out portion of'semi-circular shape concentrically disposed with respect to the pivot hole 5. On either side of said lug enlarged

recesses

16, 17, are provided within which the ends of the T-head of the movable latch member alternately move as the latch is operated. The T-head is preferably formed integrally with the central arm 18 of the movable member and on its under side carries a pair of conical extensions 19. The ends of the T-head are beveled from said conical extensions toward the upper face of said T-head and theend faces of said T-head are beveled on the side adjacent the piate of the stationary member. One of the beveled faces last referred to is intended to co-operate with an inclined rack tooth to press the window sash outwardly against the window frame in a manner presently to be described.

The main stem of the movable latch member adjacent the point where it joins the T-head is provided concentrically with the pivot pin heretofore referred to, with an enlarged boss 21 merging with the T-head and having a rearward portion 22 of circular outline. This circular boss is of a size to engage within the circular boss formed on the inner face of the body of the stationary member which is designed to take the thrust transmitted through the movable latch member when oncend of the T-head is in engagement with a rack tooth on the window frame. At the endof the main stem a fin or finger block 23 is provided whereby the movable latch membermay be operated in either direction.

In order to cause the latch to automatically engage a rack tooth when the window is raised it is necessary to place a coiled spring 24 beneath one end ofthe T-head. The coiled spring is preferably seated upon a thimble 525, the thimble being of a'height adequate to prevent the retraction of the T-head from engagement with the latch a greater distance than is necessary to bring the outer face thereof into parallel alignment with the edge of the stationary member.

When the latch is to be used upon the left hand side of a window frame the coiled spring is placed in the recess which will be lower most when said stationary member is secured to the window frame. The open end of the coiled spring will readily seat over the adj acent conical projection formed on the under sideof the T-head and the thimble may be then moved inwardly so as to be housed with in the adjacent recess in the stationary latch member. When the device is to be changed to occupy a position upon the right hand side of the window frame, the thimble and spring are removed and transferred to the opposite end of the T-head in the manner already indicated.

VJ here it is desired to use separate right and left hand latches the construction may be modified so as to provide a latch operating arm projecting through the lower end of the body portion of the stationary member and dispensing with the rearward extension clescribed in connection with the preferred form of construction.

As is shown in Figs. 7 9, and 10, of the drawing, the stationary member comprises a body portion 81 preferably of rectangular form, having

extensions

32, 33, at. either end provided with apertures to receive the fastening elements for-securingthe device to a window frame or other point of support. The body portion is provided with an opening 34;, adjacent one of the extensions, through which the operating arm 35 of the movable latch member 36 is adapted to be received. T he inner face of said body is cutaway at one side 37 to permit theprojection therethrough of the nose 38 of the'movable latch member so that it may readily engage a rack tooth 39 or similar stationary part upon the ad jacent window frame. A thickened area 41 is formed integrally in the upper end of the body of the stationary member, as is shown in Fig. 8, and is provided with a cylindrical recess 42 of a size suitable to receive a cylindrically formed member 43 on the upper end of the movable latch. v I

The construction of the movable latch member has already been partly indicated, said member comprising acylindrical upper portion merging into a main body portion provided with a laterally projecting nose tapered adjacent one edge so as to co-operate with an inclined tooth of a rack or similar stationary member. The lower end of the movable member, as stated, is provided with an off-set arm terminating in a finger block cut away on its under side so as to permit of the ready insertion of the movable member within the stationary member when the parts are to be rapidly assembled. A lug 44, proint vided centrally of the under side of the movable member, serves as a seat for a coiled spring45 which may be engaged thereover. The aperture at the base of the stationary member may be of a size to limit the movement of the finger piece to a point where the nose of the latch will be retracted even with the forward edge of the stationary member. Adjacent the concentric recess formed in the stationary member, an overhanging fin 46 may be provided, which, when pressed downwardly against the upper end of the movable member, will serve to retain the same in engagement with the stationary member.

It is obvious that. the right and left hand latch members in the modified form of construction will have operative features identical in every respect, except that one will be the complementary counterpart of the other.

In each form of construction the end of the movable latch, which engages the racktooth, or other stationary member, is beveled to cooperate with a similarly inclined face 47 on the rack tooth 48. Thus the window sash will be forced against the adjacent window frame as the weight of the Window is transferred from the operator to the interengaging latch parts.

In the form of construction shown in Figs. 13 and 14, the rack and latch members are of the type shown in Figs. 7 to 12, but are inverted and applied respectively to the window sash and to the post or frame structure adjacent the window. In this form of construction the latch does not move and is always readily accessible.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention 1. A window latch having a solid metal stationary member provided with a central recess and a socket presenting a cylindrical wall adjacent thereto, and a solid metal movable member having an extension to engage a projection on the window casing and having an enlarged boss adapted to engage within said socket and to provide a pivot for said member and to transmit the thrust from said extension directly to said wall of the socket in said stationary member.

2. A window latch having a solid metal stationary member provided with a central recess and a socket presenting a cylindrical wall adjacent thereto, a solid metal movable member having an extension to engage a projection on the window casing and having an enlarged boss adapted to engage within said socket and to provide a pivot for said member and to transmit the thrust from said extension directly to said Wall of the socket in said stationary member, and a spring interposed between said stationary and said movable members to force said extension outwardly.

3. A window latch having a solid metal stationary member provided with a central recess and a socket presenting a cylindrical wall adjacent thereto, a solid metal movable member having an extension to engage a projection on the window casing and having an enlarged boss adapted to engage within said socket and to provide a pivot for said member and to transmit the thrust from said extension directly to said wall of the socket in said stationary member, a spring interposed between said stationary and said movable members to force said extension outwardly, and means for retracting said extension against the pressure of said spring.

4. An article of the character described, having in combination a stationary member, a member movably mounted in said stationary member, a curved inner wall formed in said stationary member, a curved face upon said movable member cooperating with said curved inner wall of said stationary member to take the thrust applied to said co-acting members, a coiled spring adapted to be selectively positioned behind one of the ends of said movable member to project the same into engagement with a rack, and means for operating said movable member.

Signed by me, this 7th day of May, 1925.

' HENRY HOLLAND.