US294358A - malmstrom - Google Patents

Description

- shade around the roller.

UNITED STATES PATENT @FFICE.

DAVID BLOGH AND PETER E. MALMSTROM, OF NElV YORK, N. Y.

' WINDOW-SHADE FIXTURESAND ROLLER.

SEEGIFICATIQN forming part of Letters Patent No. 294,358, dated March 4,-1884.

7 Application filed December 10,1883. (NomodeL) To aZZ whom/it may concern.-

Be it known that we, DAVID BLOCH and PETER E. MALMsTRoM, citizens of the United States of America, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Window-Sh ade Fixtures and Rollers; and we do hereby declare the follow ing to he a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to that class ofshadefixtures that are provided with springs, by means of which the shade is automatically wound upon the roller. The manner heretofore employed to accomplish this was to insert in one end of aroller especially prepared for the purpose a spiral spring which was wound around a spindle when the shade was pulled down. lVhen the shade was let up,the spring, unwinding,would, by its force, wind the NVhile it is not denied that this mechanism was to a certain extent operative, yet it possessed disadvantages that it is the object of our invention to overcome. It was necessary with the roller or fixtures heretofore employed to use a stick or roller expressly made for the purpose, while with the use of our invention we can employ the ordinary roller so extensively in use. It is obvious that the cost of our fixtures is but a small percentage of that of others, while it possesses the advantage of being fixable in many positions. One other great advantage that our invention possesses over others is that it is not necessary to first wind the spring, since it is only necessary to roll up the shade and set the same, and the spring is wound up by pulling the shade down. ordinary clock-spring, cannot possibly get out of order. In the use of Hartshorns rollers,'if by accident, while tacking the shade on the stick, a tack is driven the leasttoo deep, the operation of the spring is stopped and it becomes useless. It is immaterial in what position the shade may be when removed from the fixture.

In. the accompanying sheet of drawings, Figure 1 represents an inside view of a window with shade-iixture affixed Fig. 2, a view of the casing with the top removed, showing the mech- The spring,being an A represents the casing having the angles a,

provided for the purpose of either attaching the fixtureat the end or side. The roller B is provided at its opposite ends with the metal-v lic cap-pieces E and K. From E extends the cylindrical stud P, which is loosely journaled -in the bracket -D. The cap-piece K is provided with asimilar prolongation, hollowed out, as shown, to correspond with the flattened sides of the truncated prismoidal end Z of the shaft 0, journaled within the casing A. The shaft 6 is provided with a longitudinal groove for. engagement of the angled pawl f, turning on the supporting-pin d. A pinion, 0, upon the shaft 0 engages with the teeth of a wheel, a, fixed upon the loosely-journaled shaft 12. A band-spring, 9, adjacent to the face of the wheel, is attached at its inner end to the shaft 12, and at its outer end to the fixed pin h. v

The partsbeing arranged and disposed as described, the operation of the device is as follows: The curtain being first wound upon the roller 13, the spring gbeing in an uncoiled condition, the curtain may be lowered to any desired height by drawing it down in the ordinary manner. The lowering of the curtain causes the roller B to revolve in its bearings. The revolution of the roller insures a like movement of the shaft 6, to which it is clutched by means of the prolongation Z. The pawl f glides over the surface of the shaft. The fixed pinion 0 upon the shaft 6 causes the revolution of the engaging toothed wheel a in an opposite direction, and the spring 9 accordingly begins towind upon the shaft b.

To arrest the curtain at approximately any desired point it is merely necessary to hold it at that point for a moment, and then allow its slight retrograde movement until the pawl f falls into the groove in the shaft 6. To release the curtain from that position and rewind it partially or completely,-the pawl, by a quick downward movement of the curtain, is

thrown out of the groove in the shaft c,wl1ereupon the resiliency of the spring g,commnnicated through the wheel a, pinion c, and shaft 0, causes a revolution of the roller B in the contrary direction and rewi-nds the curtain. Its upward movement may in a similar manner to that before described be stopped at any desired height. 1

The casing A is made in two sections, east separately, the inner plate being fitted to the main body, as shown in Fig. 6.

Having described our invention, what we claim is 1. In an automatic spring curtain-roller, the arbor b,provided with the spring 9 and toothed wheel a, in combination with the shaft 0, longitudinally grooved and formed with the truncated prismoidal end, the pinion 0, carried by said shaft and paw], and the roller B, provided with the cap-piece K, for clutching the end of 20 DAVID BLOOH. I I. E. MALMSTROM.

Vitnesses:

hL IRCUS BLooH, Grills. T. BARRY.

Images