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Publication numberUS132631 A
Publication typeGrant
Publication dateOct 29, 1872
Publication numberUS 132631 A, US 132631A, US-A-132631, US132631 A, US132631A
InventorsD. Chance
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Improvement in sash-balances
US 132631 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)


Hnprovemenin Sash-Balances.

NO.`132,53. Patented Oct. 29,4 i872. rig@ Hg.L




Specification forming part of Letters Patent No. 132,631, dated October 29, 1872.


and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing making a part of this specification and to the letters and figures of reference marked thereon.

Figure l of the drawing is a representation of a window with my sash-balance attached; Fig. Zis a sectional view of my invention; and Fig. 3 is a top view of my invention.

My invention has relation to window-sash attachments 5 and consists in providing adouble adjustable clutch to operatein conjunction with a volute spring, barrel, and fusee, sliding plate, spring, lever, and cord for raising and lowering the sashesindependently of each other, substantially as hereinafter described.

In the accompanying drawing illustrating this invention, A represents a windowframe; B, the upper, and B the lower windowsashes. O is a transverse shaft supported upon the top of the frame A by means of standards (l1 C2. Upon this shaft is placed a double-cro wn ratchet-wheel, D, having its periphery grooved at d to receive a cord, d1, attached to the upper sash B. The wheel D is loose upon the shaft O, and is adapted to engage at different times with a stud, d2, projecting from the standard O1, and with a stud, d3, projecting from the periphery of a barrel, E, attached to the shaft O, and containing a volute spring, E', one end of which is connected to the shaft and the other to the barrel. For the purpose of connecting the wheel D with said studs the former is provided with a grooved collar, e, which rests on a forked arm, el, on the end of a sliding plate, e2, which is actuated through the medium of a cam-lever, F, having a cord, F1, attached, and a spring, F2, encircling a shank on the forward end of said plate. The plate e2 has a pro- `jection, c3, to allow the lever to catch on. Gonnected with the barrel E is a fusee, H, which, with the barrel, turns upon the shaft C, the same being' stationary. Around said fusee winds a cord, I, attached to the lower sash B.

These devices operate as follows: The sashes.

being in their proper position-B up and B down-the sash B is raised by a slight push, its weight being balanced by the volute spring E. To lower the upper sash the cord Fl is to b'e pulled, which will engage the wheelD with the barrel E and cause them to revolve` together. When the upper sash is at the proper height the cord is released. The wheel D will then slip back and engage with the stud d2 by the action of the spring F2, and will thereby hold the sash suspended. The lower sash may be now lowered to its original position. Now, to raise the upper sash the lower sash is to be raised a little higher than the other, the cord F pulled, and the lower sash pulled down. By this means the desired effect will be produced. K indicates a pivoted dog, which is connected to the wheel Dto prevent its turning while the devices are being arranged.- The object of the device or pulley H being constructed on the fusee principle is to compensate in leverage for' the expansion of the volute spring E.

What I claim as my invention, and wish t secure by Letters Patent, is

fl. The double adjustable clutch D, in combination with the volute spring E', barrel E, fusee H, studs d2 d3, and sashes B B', substantially as specified. c

2; The sliding plate 62, spring F2, lever F, and cord F1, in combination with the clutch D, barrel and fusee E H, and the sashes B B', substantially as described.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5054162 *Aug 17, 1990Oct 8, 1991Schlegel CorporationConstant force compensation for power spring weight balance
CN101507871BMar 27, 2009Jun 9, 2010华中师范大学Constant-force chest developer
Cooperative ClassificationE05D13/00