US46481A - Improved sash-fastener - Google Patents

Description

NITED STATES WILLIAM- C. MCGILL, OF CINCINNATI, OHIO.

IMPROVED .SASH-FASTENER.

Specification forming part of Letters Patent No. 46,4@ E, dated. February 2l, 1865.

To all whom it may concern Be it known that I, WILLIAM (l. MCGILL, of Cincinnati, Hamilton county, State ot' Ohio, have invented anew and useful Sash-Fasten er, of which the following is a full, true, and eX- act description, reference being had to the accompanying drawing, making part of this specification.

My invention relates to a contrivauce for automatically holding a sash 'to any position at which it may be placed, the device being represented in the drawing by a side eleva tion to double the scale of reality.

A represents a part ot the windowiiamb.

B represents a part of one of the sash-uprghts or side posts.

C is a plate, a stud, D, upon which serves as the common fulcrum of two gravitating latches E F, both of which, when not withdrawn by the operator, project slightly outside of the vertical edge ot' the sash, so as to impinge against the inner edge of the jamb. In order to insure their engagementin the jamb, the said projecting ends are brought to a point, as shown, the point ot' the latch E being compelled to press upward against the jamb by a counterbalance, e, and the point of the upper latch F by its simple gravity. Either latch may be relieved from action by means of a small crank, G, which may by a partial rotation be brought to bear at discretion on the inner limb, e or f, of either latch.

A milled head, H, or other convenient knob or handle on the outer end of' the crank, enables its manipulation. Each inner limb is slightly notched or indented, e andf, in order to prevent the escape ot' the crank from the latch without operating the knobor handlev H. Pins I I on the plate limit the backward stroke of the latches. The forward or acting stroke ot` the latches is limited by their-inner limbs impinging against the operating-crank. It is obvious that any attempt to elevate the sash from the outside will be resisted by the latch F, and that, on the other hand, the decent ot' the sash, either by personal violence or its own own Weight, will be opposed by the latch E, the theory ot' their action being that a t'urther motion tends to bring the ends ofthe latches on a more projecting portion of their arcs, and this is,ot' course, opposed by the substance o't' the jamb itself. f

Iclaim herein as new and ot' my invention- .lhearrangement ot' the pair ot' gravitating latches E e c and F f, and ot' the operatingcrank- H Gr, the whole being formed, combined, and operatingsubstantially as set forth. In testimony ot' which invention I hereunto set my hand.

A W. G. MCGILL.

WVitnesses: n

GEO. H. KNIGHT,

J AMES H. LAYMAN.

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