US1072593A

US1072593A - Window-latch.

Info

Publication number: US1072593A
Authority: US
Inventors: George Erz
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-04-21
Filing date: 1911-04-21
Publication date: 1913-09-09
Anticipated expiration: 1930-09-09

Description

G. ERZ.

WINDOW LATCH.

APPLICATION FILED APB..21, 1911.

1,972,593, A Patented Sept. 9, 1913.

WITNESSES IIVVE/VTOR 14 TTORIUEYS .eEo GE m r rrnnn, wasemcrpm LflTCH.

Specification of {Letters Tatent. I

Pat nted Sept-9, 1915 .mnnoamnmmr 2mms m m. maizlowing is a full, clear, and exact description. I

My invention is an improvement in winplaced at either side of the window and which will be inconspicuous when in place.

In the drawings :-Figure 1 is a front view of the improvement, showing the latch extended with the cover plate removed; Fig. 2 is a similar view showing the latch withdrawn; Fig. 3 is a similar view showing the latch-partially extended; Fig. 4 is a section on the line 4-4 of Fig. 1; Fig. 5 is a face view of the escutcheon with the handle removed; Fig. 6 is a similar view with the handle in place; and Fig. 7 is a section on the line 77 of Fig. 1.

The present embodiment of the invention comprises a casing consisting of plates 1 and 2 spaced apart by a block 3 and held together by screws 4 which ass through the plates and the block. The lock is provided with a central recess 5 and with a longitudinal passage 6 intersecting the recess and opening at one end of the block. The said end is covered by a shield plate 7 A latch 7 is slidable in the passage 6, and the upper corner of the outer end of the latch is beveled at 8. The latch is provided with a transverse slot 9 and with recess 10 in one side wall extending at right-angles to the slot andintersecting the same. The latch is normally pressed outwardly by a coil spring 11 seated in the inner end of the passage 6 and bearing against the inner end of the latch. A' plate 12 is provided for attachment to the window caslng and the said plate is equipped with ratchet teeth 13. The teeth face upward so that when the window is lifted the beveled corner of the latch will engage the inclined faces 14 of the'teeth. When However the window is lowered, the lower edge of, the latch engages the horizontal faces 15 of the teeth and hold the latch and window in adjusted position.

An operating cam 16 is arranged in the opening'lO, and the said cam is provided with an eccentric portion 17 having one edge 18 plain and the other edge provided with ratchet :teeth "19. .That portion of the latch at each end of the opening '10 is provided with spaced notches 20 for iengagementcby the point of the .eccentric :portion of the cam to EhOld :the said latch withdrawn .or extended, A key21 is provided for operating the cam and the cam has a central opening tor receiving the .key- The .outer lend 22 .of the key is polygonal in cross section and is ovided with a cross head 23 secured to the ey by a pin 24. The head is arched longitudinally and isarranged with its ends in contact with an escutcheon 25 circular in form and having openings 26 for receiving screws or nails to hold it in place. The

escutcheon is also provided with a central openin 27 for the key and with indications or gui es in the form of legends 28. The said guides indicate the positions to be assumed by the head to hold the latch open, closed, or in the position of Fig. 3. The head is provided at one end with a point 29 acting as an indicator, and at the other end with a claw 30 to distinguish the said end from the end 29. The cam may be turned by the key and when so turned will extend or withdraw the latch bar and the said bar may be locked in either position by engaging the point with a notch.

The curved edge 18 of the cam 16 is adapted to engage the rear wallof the recess 10 in the latch 7 to retract the latch and to put the spring 11 under compression. If desired, the point of the cam may be engaged in the teeth which, are formed in the rear wall of the recess 10, to hold the latch releasably in a retracted position. Likewise, the point of the cam may be engaged in the teeth which are formed in the forward wall of the recess 10 in the latch 7, to prevent rearward movement of the latch beyond a predetermined point represented by the extremity of the cam. At times, the point of the cam cannot be engaged in the notches -which are formed in the forward wall of the recess 10 in the latch 7, because the plate is formed on the forward wall of the recess- 10in the latch.

I claim:-' In a device of the class described, a casing; alatch mounted in the casing for right line movement, the latch having a recess and there being teeth formed in the latch in the forward and rear walls of the recess; spring means for advancing the latch; a shaft journaled in the vcasing; and a cam secured ,to the shaft, the cam being movable in the recess, the camhaving a curved surface adapted to engage the rear wall of the recess, to retract the latch against the action of the spring means, the cam having a point adapted to en age detachably in the teeth of the rear wa to hold the latch retracted, and to engage the teeth of the forward wall detachably, thereby to prevent rearward movement of the latch; thecam having teeth in one ofits edges, adapted to cooperate detachabl with the lowermost tooth of the for-war wall to prevent a retraction of the latch when the same cannot be advanced sufficiently to to lcloiiperate wlth the teeth of the forward wa 1 In testimony whereof I have signed my name to this specification in the presence of a two subscribing witnesses.

GEORGE- ERZ.

Witnesses:

D. L. Bnoxnfl, H. E. Smam'.

ermit the point of the cam 20