US3429071A

US3429071A - Sash lock for removable sash windows

Info

Publication number: US3429071A
Application number: US633801A
Authority: US
Inventors: Irving H Phillips
Original assignee: JAMES C WILBORN AND SONS Inc
Current assignee: JAMES C WILBORN AND SONS Inc
Priority date: 1967-04-26
Filing date: 1967-04-26
Publication date: 1969-02-25
Anticipated expiration: 1986-02-25

Description

Feb. 25, 1969 l. H. PHILLIPS SASH LOCK FOR REMOVABLE SASH WINDOWS Filed April 26, 1967 INVENTOR. 1, III/V6 fl. P/l LL 6 BY #45 4770mm United States Patent laims ABSTRACT OF THE DISCLOSURE A spring sash balance for removable sliding sash windows having an automatic sash balance locking member actuated by the window when the same is to be removed or pivoted relative to the mounting sash.

The invention will be best understood by reference to the accompanying drawings showing the preferred form of construction and in which:

' FIG. 1 is a perspective view of the locking member of the invention.

FIG. 2 is a plan view of the lock carrier in its unassembled condition.

FIG. 3 is an end elevational view showing the lock and lock carrier in their preassembled relation.

FIG. 4 is a fragmentary detailed side sectional view showing the invention in an unlocked position.

FIG. 5 is a side elevational detailed view showing the invention in its locked position, and

FIG. 6 is a fragmentary detailed sectional view showing the invention in relation to a window sash and mounting channel.

Referring to FIG. 6 there is shown in section a mounting channel 10 of the type that is adapted to be yieldably mounted on the vertical walls defining the window opening. It being understood that to either side of the window opening there will be complementary mounting channels of the construction hereinafter described.

The mounting channel 10 of FIG. 6 includes

edge walls

11 and 12 which terminate into

front wall sections

13 and 14, respectively. Formed in the

front wall sections

13 and 14 by recessed

side flanges

15 and 16, which flanges terminate into a base wall 17 is an elongated window sash frame guideway 18. Mounted to the rear of the base wall 17 are

side walls

19 and 20 interconnected with a rear wall 21 so as to form a retaining chamber 22, which extends throughout the elongated length of the mounting channel 10.

A vertical edge portion of a window frame 23 provides a tongue 24 which projects into the window sash frame guideway 18 so as to be slidably guided therein. The tongue 24 of the window frame 23 provides an arcuated cam face 25 which bears upon the corner line of junction between the front wall 14 and side flange 16, as seen in FIG. 6.

Carried by the window frame 23 is a pivot and supporting pin 26. This pin has an insert end 27 which is projected into a suitable aperture 28 formed in the window frame 23. It also provides "a circular collar 29 which is of a diameter greater than an elongated slot 30 formed in the base wall 17 of the mounting channel 10. The collar 29 is adapted to be disposed between the side edge of the window frame 23 and the base wall 17 as shown in FIG. 6. The pin 26 provides a trigger end 31 which has its opposite side edges flattened as at 32 so that the trigger end 31 may be projected into the slot 30 as shown in FIGS. 4 and 6.

All of the above identified structural elements are wellknown in the art and make up no part of the present invention except for their functional relationship thereto.

As is recognized in the art of removable and tiltable 3,429,071 Patented Feb. 25, 1969 window sashes, it is required that the sash balancing member, which in the present instance is indicated as an expendable coil spring 33, be locked in place during the tilting or removing of the window frame from the sash mounting. To accomplish this required function a sash balancing lock member is provided. In the present instance the lock 34 comprises a metallic member having a substantially thin, flat body 35, the top edge portion of which is angularly bent to provide a top flange 36. The top flange 36 has an extension carried at one end normally bent out of its longitudinal plane, and extending beyond the rear edge 37 of the body 35 of the lock 34, forming a locking contact element 38. The front edge 39 of the body 35 is recessed as at 40 and provides an elongated leg 41 which has its free end bent to extend laterally therefrom so as to lie in a plane transverse to the plane of the top flange 36. This angular end forms a trip finger 42 having a cam face 43 tapered downwardly and in the direction of the leg 41 as seen in FIGS. 1 and 3.

A lock carrier 44 may be of a one-piece molded construction, preferably formed from a plastic material. The carrier 44 will include a front wall 45, the top edge of which adjacent to one side is recessed as at 46, for a purpose hereinafter made apparent. The front wall 45 has formed on one face thereof a perpendicularly extending pivot post 47 as well as a locking stud 48 carried by a spacer bearing 49. A spacer bar 50 is provided adjacent one side edge of wall 45, and lies in substantial horizontal alignment with the pivot pin 47. The rear wall 51 of the carrier 44 is connected to the front wall 44 by two spaced apart bendable stirrup members 52. This rear wall 51 is provided with a recess 53 which also includes a guide slot 54. The face of the rear wall 51 which is adapted to be bent into confronting relation with the one face of the front wall 45 provides

circular recesses

55 and 56 which will receive the pivot pin 47 and mounting stud 48, respectively, in a manner shown in FIG. 3.

The lock 34 has an aperture 57 formed in the body 35 thereof adapted to have journaled therein the pivot pin 47 when the carrier is assembled in the manner described and as shown in FIG. 3. When the lock 34 is so assembled the trip finger 42 will project into the guide slot 54 formed in the rear wall 51 of the carrier 44 as shown in FIGS. 4 and 5.

When the lock 34 is mounted on to the carrier 44 the spring 33 Will have one end connected to the flange 36 of the lock 34 as seen in FIGS. 4 and 5.- When the whole window assembly is completed the pivot and support pin 26 will project through the slot 30 formed in the mounting channel 10 and be inserted in the

recesses

46 and 53 formed in the front wall 45 and rear wall 51 of the lock carrier 44, and by the weight of the window will engage and depress the trip finger 42 so that the same is moved into the slot 54 formed in the rear wall 51 of the carrier 44 as seen in FIG. 4. This position of the lock 34 is normally against the tension of the counter-balancing spring 33 which has a tendency to pivot the lock 34 in a clockwise direction about the pivot post 47 provided by the lock carrier 44 as viewed in FIGS. 4 and 5.

When the window is to be tilted and removed the cam face 25 formed by the window frame 23 will bear against the mounting channel 10 and resiliently move the same laterally away from the window unit much in the manner as set forth in United States Letters Patent 2,828,513 issued Apr. 1, 1958.

As the window is tilted the pin 26 will likewise be rotated through its longitudinal axis such that it will assume the position shown in FIG. 5 where, as the pin 26 has rotated the mounting channel 10 has moved laterally thereof, permitting the insert end 31 of such pin 26 to move down the cam face 43 of the trip finger 42, permitting the lock 34 to be pivoted in a clockwise direction about pivot post 47 under tension of the counter-balancing spring 33 until the locking contact element 38 of the top flange 36 frictionally engages the inner surface 58 of the wall 20 of the chamber 22 formed on the mounting channel 10. This condition of the structure is clearly shown in FIG. 5.

Under the locked condition as hereinbefore described the window may be removed from the window opening while the lock carrier 44, lock 34, and counter-balancing spring 33 remain in their position longitudinally of the mounting channel 10.

When the window is reinserted into the sash the pin 26 will be caused to once again engage the trip finger 42 so that under the weight of the window the lock 34 will be pivoted into its unlocked position as viewed in FIG. 4.

While I have illustrated and described the preferred form of construction for carrying my invention into efliect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do

not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent is:

1. A lock for a sash balancing member of a tiltable, removable window having a pivotal supporting pin removably mounted in a sash lock carrier slidably contained in one of a pair of resiliently separable opposed channel sashes with a locking member pivotally mounted in the lock carrier and connected to one end of the sash balancing member and pivoted in one direction by the force thereof to latch the lock carrier against slidable movement through the channel sash wherein the improvement comprises:

(a) a trip finger carried by and extending perpendicularly to the locking member and in longitudinal alignment beneath the pivotal supporting pin, the weight of which when supported on said trip finger acts to counterweight the pivoting force of the sash balancing member on the locking member and pivots the same in an opposite direction, and

(b) means provided by said trip finger over which one end of the pivotal supporting pin laterally moves as it is axially rotated when the window is tilted so as to be displaced from engagement with the locking member while supported by the lock carrier, permitting the locking member to be pivoted in one direction by the force of the sash balancing member into locking contact with the channel sash.

2 A lock for a sash balancing member as defined by claim 1 wherein said means over which one end of the pivotal supporting pin laterally moves comprises a cam surface extending inwardly and downwardly in the direction of the outer end of the pivotal supporting pin.

3. A lock for a sash balancing member as defined by claim 1 wherein the sash lock carrier is of a one-piece construction providing complementary sections foldable into spaced confronting relation and between which is pivotally mounted the locking member, each of said sections providing an aligned recess forming a seat for the free end of the pivotal supporting pin, one of said recesses formed in one of said sections having open communication with an elongated slot through which movably projects said trip finger.

4. A lock for a sash balancing member as defined by claim 3 wherein said means over which one end of the pivotal supporting pin laterally moves comprises a cam surface extending inwardly and downwardly in the direction of the outer end of the pivotal supporting pin, with said cam surface movable through said elongated slot formed in one of said sections.

References Cited UNITED STATES PATENTS 2,828,513 4/1958 Nardulli 49l74 2,987,758 6/1961 Osten 49446 X 3,012,292 12/1961 Brengman 49-446 3,124,849 3/1964 Osten 49l74 3,222,733 12/1965 Wahlfeld et a1. 49181 3,233,278 2/1966 Lundgren 49181 X DENNIS L. TAYLOR, Primary Examiner.

US. Cl. X.R. 16-197