US1728276A - Sash lock - Google Patents

Description

Sept. 17, 1929. HQYT 1,728,276

I SASH LOCK Filed Jan. 18, 1928 2 Sheets-Sheet 1 ATTORNEY Sept. 17, 1929.

SASH LOCK Filed Jan. 18, 1928 2 Sheets-Sheet 2 ATTORNEY D. HOYT 1,728,276 j Patented Sept. 17, 1929.

UNITED STATES PATENT orrics DANIEL HOYT, OF EAST ORANGE, NEXV JERSEY, ASSIGNOR TO NATIONAL LOOK WASHER COMPANY, OF NEVI'AR-K, NEW JERSEY, A CORPORATION SASH LOCK Application filed January 18, 1928. Serial No. 247,552.

This invention relates more particularly to sash locks used on car windows in connection with a rack secured to the window frame.

There are many difficulties encountered by railroads regarding locks for car windows. The horizontal bolt comprising an element of the usual car window sash lock is apt to work off from the rack teeth due to the Vibration of the car, allowing the sash to fall, with the liability of injuring a passenger. Also it has been noticed that workmen, in applying the lock, find it diflicult to properly position the lock on the sash relative to the rack. Another objection to the usual car window lock, is that the sash often sticks to the sill, due to sticky soft varnish, swelling of the woodwork, etc. A further objection is that the sash may be raised from one position to another by simply pushing up on the sash without operating the locks, causing wear on the locking detent and the rack lugs.

One of the objects of this invention is to provide a sash lock in which a cam locking detent is used in connection with a rack whereby the lock tends to hold the sash tighter bythe jolting of the car.

Another object is to provide a lock having rack so constructed that the sash cannot be raised or lowered without operating the finger pieces.

Another object is to provide a sash lock having a guide to enable the proper positioning of the lock on the sash relative to the rack.

Another object is to make a sash lock which will pry the sash free from the sill and assist in the initial movement of raising the sash.

Figure 1, illustrates the lower corner of a sash in a window frame, the sash being in the closed position, with my novel sash lock secured to the face of the sash, and the rack secured to the side of the window frame.

Figure 2, is an edge view of Figure 1 looking from right to left.

Figure 3, is the same as Figure 1 withthe levers closed together, the sash unlocked and pried free from the window sill.

Figure 4 is an edge view of Figure 3.

Figure 5, is the same View as Figure 1, but

having a modified plate on the window sill cap. I

Figure 6, is the same as Figure 5, with the levers closed together, the sash unlocked and pried upward abovethe sill cap.

Figure 7, is a cross sectional view of the lock, showing the spring controlled lever.

Referring to the drawings:

.A represents one of the side posts of a car window frame. B is the window sill. O is the sill-cap. D is the inside sash stop. E is the outside sash stop. F is the sash.

On the face of the inside sash stop D is secured a metallic rack 1, having holding lugs 2, the upper sides ofthe lugs tapering downward, and the under sides being under cut, or hook shaped, as shown in Figures 1, 3, 5 and 6.

On the sill cap O is secured a thrust plate 3, one end of which preferably abuts the lowor end of the rack 1. This plate 3 may be made with a straight top face, as shown in Figures 1 and 3, or it may be-made with an inclined top face as shown in Figures 5 and 6.

On the face of the sash F is secured the lock, which consists of a heavy metallic plate 1 having a stationary fingerpiece 6, made integral therewith, one end extending inwardly beyond the plate 4andwideHed to form a convenient finger-piece, the opposite end of the finger piece 6 forminga guard 7, and beneath the guard 7 is formed a stop 8 adapted to engage the'stop 9 on lever 12. Beneaththe stationary finger-piece 6 is located a fulcrum post 9 The plate 4: is provided with a lug 17, to enable workmen to properly position the lock relative to the rack.

On the fulcrum post 9 is a lever 12, adapted to partially revolve thereon. The lever 12 is of peculiar formation, as shown in Figures '1, 3, 5 and 6, the inner end 10 widened out to correspond with the stationary finger-piece 6; At the opposite and lowerend of the lever 12 is a head 11, the lower end of said head 11 is adapted to engage the rack 1 above the lugs 2 when the sash F is in a raised position and to rest on the outer end of the thrust plate 3 when the sash F is in the closed position. The upper end of the head 11 forms an up. turned hook, which is adapted to engagethe. down turned hook of the lugs 52' on the rack 1, which prevents the sash F being raised without operating the finger piece 10.

WVithin the cam lever 12, and around the fulcrum post 9 is located a coiled spring 14 which constantly tends to force the head 11 outward against the rack 1, and the inner end 10 of the lever downward.

It is understood that one of these locks shall be secured at each side of the sash.

hen the lock plate 4 is secured in position on the sash the lower point of the head 11, will bear against the rack 1 and the thrust plate 3, as shown in Figures 1 and 5, the sash resting on the window sill in the closed position. When it is desired to raise the sash the linger- pieces 6 and 10 are grasped on each side of the sash and pressed together. i he initialmovement of the levers 12 price the sash from the sill with much more force than a straight pull will do, and when the fingerpieces are closed together, as shown in Fig ure 2 the sash will have been forced upward about 3/8 of an inch from the sill, from which point the sash should be free to raise easily.

WVhen the sash is raised to any point desired the finger-pieces are released and the spring 14c will throw the head 11 into the recesses of the rack 1 which will hold the sash in the raised po,sition,-where it cannot be raised or lowered without operating the levers.

Figures 5 and 6 show a modified thrust plate 3 having an inclined portion 16. When the sash is in the closed position, the levers will be practically in the same position as shown in Figure 1; but when the finger pieces are compressed the head 11 will cam over the inclined portion 16 and the sash will be raised over 5/8 of an inch above the sill, or above any ordinary sill-cap.

It will be understod that this cam lever may be encased, and other modifications of the structure may be made without departing from the invention, the scope of which is set forth in the appended claims.

I claim:

1. In combination with a window frame having a sash adapted to move therein, a rack mounted on the side of the window frame, a thrust plate fixed to the window sill abutting said rack, a latch on the sash comprising a metallic plate having a lug at its lower edge adapted to engage an edge of the thrust plate, a cam lever pivoted on said plate, said lever having a finger-piece at one end and a latching head at the other end, whereby the latch may be properly located on the sash.

2. The combination with a window frame, a sash to move therein, a rack on the side of the window frame, a thrust plate on the bot tom of the window frame abutting the rack, the top surface of said thrust plate having an inclined face, a latch on the sash having a stationary finger piece and a pivoted lever having one end forming a finger-piece the other end of the lever engaging the rack and the thrust plate when the sash is closed, and means to urge the lever into engagement with the rack.

3. A latch for car windows comprising a rack adapted to be mounted on the side of a window frame, said rack having a plurality of spaced undercut lugs having their upper sides tapering downward, a thrust plate adapted to be mounted on the sill cap of a window and abut the lower end of the rack, a metal plate mounted on the sash, said plate being provided with a lug adapted to engage an edge of the thrust plate to enable the proper positioning of the plate relative to the thrust plate, a finger piece formed integral with said plate, a lever pivoted to said plate and having one end formed into a finger-piece, the other end of said lever being hook-shaped, and means to normally force the hook-shaped arm against the rack.

4. In combination with a window frame, a thrust plate at the bottom of the window frame having an inclined face, a sash latch on the sash having a cam lever, one end forming a finger-piece, the other end resting on the inclined face of said thrust plate when the sash is closed, substantially as described.

This specification signed this 11th day of January, 1928.

V DANIEL HOYT.

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