US32043A - Island - Google Patents

Description

unirsi) srarns fearn'r onirica.

JAMES G.' BUTTERWORTH, OF PROVIDENCE, RHODE ISLAND.

SASI-I-FASTENER.

Specification of Letters Patent No.` 32,043, dated April 16, 1861.

To all whom it may concern:

Be it known that -I, JAMES C. BUTTER- woRrH, of Providence, in the county of Providence, in the State of Rhode Island, have invented a new and Improved Vindow- Sash Fastener; and I do hereby declare that the following is a full and correct description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, the same letters in all the figures denoting the same parts.

In these drawings, Figure 1, is a perspective view of the fastener. Fig. 2, is a section taken through the center of the same, across the shaft of the cam and showing parts of the sash and frame. Fig. 3, is a representation of the shaft and lever detached from the cam. Fig. l, shows the face of the cam.

To construct my improved sash fastener, make the plate A, with two projections or standards E, E, at or near one end, and with a recess through the plate between them; a hole is made in each of the standards at T, to receive the pivot or shaft of the cam B, which is placed between the standards E, E, and which also projects through the recess in plate. At the other end ofthis plate, upon the back of it, a spring C, is attached, which extends up' on the back of the plate far enough to allow its free end to rest upon the under side of the cam B. There is another recess P, through the plate A, a litt-le below the one between the standards, to allow the stud N, which is attached to the spring O, to project through.v

S, 5, are holes at each end of the plate for lie pupose of fastening it to the sash. (See 4inf. 2

Ihe face of the cam B, or that part of it that projects through the plateA, is recessed as seen in Figs. 2, and 4, O,to receive a piece of rubber packing or other semi-elastic material, which projects a little above the face of the cam; the objectof which is to prevent the metal cam from wearing a place in the window frame L, and to insure sufficient friction on the cam to sustain the sash when raised; this rubber or substance used in the recess of the cam is subjected to a great strain while the sash is being supported, this strain tending to rub it from its place which makes it very difficult to hold it upon the cam. To obviatethis difficulty, I make the bottom of the recess in the face of the cam, full of small points projecting outward7 either by making the proper points in the core` that forms the recess at the time of casting the cam, or in some other suitable way;- these points enter the rubber when it is subjected to the strain before mentioned, and prevent it from moving from its place; the greater the weight to be sustained. the deeper the points will enter the rubber, and the more firmly it will be held in place. The bottom of the recess in the cam may be made full of creases, or corrugated, for the saine purpose but does not answer as well.

The lever and shaft D, of the cam B, are secured to it by having a screw thread cut. upon the shaft and a corresponding thread in the hole in the cam; this is to admit of the lever and shaft being easily removed, which may be done by turning the lever around in the opposite way to that by which the cam is operated. When this lever is removed the sash will be securely locked against being opened from the outside by breaking the glass and operating the fastener, as is frequently done with the ordinary fasteners; and it will also prevent the sash from being raised (or lowered) by children andv others on the inside, at improper times.

The operation of the fastener is as follows. When it is desired to raise the sash, the lever V, is raised which turns the cani B, back, and presses the spring O, back also, withdrawing the stud N, from the recess J, in the window frame; when the sash will be free to move; when the sash is required to be held at any particular height, the lever V, is released, when the spring O, will push the cam B, outward, and cause it to press against the window frame, and the friction of the rubber pad on the face of the cam, against the frame, causes the4 cam to turn out farther as the sash inclines to descend, until it presses the sash so hard against the window frame on the opposite side, as to create friction enough there to` projects far. enough to prevent the stud N, as described, with the plate, and springs from touching the Window frame. for the purposes herein set forth. v j, Having thus described my improved sash 4 fastener, What I claim as my invention and JAMES C' BUTTERWORTH' 5 desire to secure by Letters Patent is: Witnesses:

-The combination of the cam, recessed and THOMAS C. GREENE, furnishedvvith the ricton pad substantially BENJAMIN ARNOLD. A

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