US880554A - Fly-guard. - Google Patents

Description

No. 880,554. v PATENTED MAR. a, 1908. W. F. MANNERS. FLY GUARD.

APPLICATION FILED AUG. 9, 1906.

77 74, Maia/2621f FLY-GUARD.

Specification of Letters Patent.

Patented March 3, 1908.

Application filed August 9. 1906- Serial No. 329-807.

To all whom it may concern:

Be it known that I, VViLLiAM F. MANNERS, a citizen of the United States, residing .at Parker, in the county of Linn and State of Kansas, have invented certain new and useful Improvements in F ly-Guards, of which the following is a specification.

My invention relates to improvements in fly-guards; and my object is to provide eflicient means for preventing flies, mosquitoes, and other insects from entering buildings when the doors thereof are opened.

The invention consists in the novel con struction, co1nbination,'and arrangement of parts hereinafter described, pointed out in the claim and illustrated in the accompanying drawing, and in order that the invention may be fully understood reference will now be made to said drawing, in which Figure 1 represents a broken front elevation of a door and case provided with my invention. Fig. 2 is a longitudinal section of a roller employed in carrying out the invention. Fig. 3 is a broken side elevation of the upper portion of the door case and my invention. Fig. 4'is a broken perspective of a portion of one of the rotary fans, forming part of the invention.

1 and 2 designate a door and case, and 3 and 4 designate rotary fans arranged at the top and one side of the case, respectively.

5 designates brackets in which the fans are journaled, said brackets being secured to the case.

Each fan consists of a roller 6, blades 7, a stub shaft 8 and a shaft 9 mounted in the brackets. Shaft 8 is fixed to one end of the roller, while shaft 9 extends loosely through the opposite end'of the roller and is rovided with an outer rectangular termina 11 which fits snugly in an annular notch 12, in one of the brackets, to keep the shaft from turning with the roller. Blades 7 consist, preferably, of two layers of cloth 13 sewed together in such a manner as to leave a central longitudinal opening 14 for the reception of the roller, which fits tightly therein so that the blades will not slip upon said roller when the latter is rotated.

15 desi nates drums secured to the adjacent en s of the rollers for the reception of two independent cables 16 attached at their ends to said drums and to a screw eye 17 projectin from the adjacent corner of thedoor. T e cable attached to the uppermost drumextends around a pulley 18, ournaled in a yoke 19, 20, projecting from the upper portion of the door-case, thus the pulley acts 'as a guide when the door is opened, and prevents the cable from pulling across the flange of its respective drum.

Roller 6, is provided atone end with a metal plate 8 through which stub shaft 8 passes, the latter having a collar 8 thereon which abuts plate 8. At its opposite end a plate 25 is mounted having an annular inwardly extending peripheral flange '26, which engages in a seat provided therefor in said end of roller 6. Shaft 9, has a collar 27, thereon which abuts plate 25. Since pulley 15, as depicted in Fig. 2, engages over flange 26, it assists in holdin plate 25in position.

21 designates a coil spring arranged in each roller and secured at one end to the latter and at its opposite end to the inner terminal of shaft 9.

In practice the fans are rotated at a high rate of speed when the door is opened, by the cables unwinding from the drums. The movement of the fans will scare away the flies gathered upon the door and the case, so that they will not ass through the doorway and enter the buil ing while the door is being opened or closed; As the cables unwind, the springs will be wound up and thus automatically close the door just as soon at it is released, so that the springs usually applied to screen-doors for closing the same may be dis ensedwith.

am aware that devices of the same general character have been patented, but the principal differences and advantage which my invention possesses over them is that I employ two entirely independent fans and independent operating means therefor. Hence e'ithermay be omitted, replaced by another of different size or length, or removed temporarily as for repairs; and even if one fan should not operate, the spring in the other would be of sufficient strength to close the ordinary screen door.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

In combination with a door frame and the door thereof, a pair of fan rollers, a metal plate on each end of each roller, a shaft passmg through one of the plates and into the ro ler, and having a collar which abuts the plate, one of said plates on each roller having an inwardly extending peripheral flange pivotally secured to a staple which is received in a groove provided therefor in one end of said rollers so as to lie flush With the peripheries of said rollers, a drum on said last named end of each roller which extends over and engages a portion of said plate flange, a second shaft passed through said second named 'plate and having a collar which abuts the outer face of said second named plate, a coil spring surrounding said second shaft and being secured at one end to the latter and at its opposite end bearing against theinner face of the second named p ate, said rollers being disposed along the top and one side of the door frame and having their drums adjacent, a screw eye on the 1:; door at the upper outer corner thereof, and cords immovably afiixed at one end to said eye and having their free ends connected to said drums.

In testimony whereof I affix my signature, 20 in the presence of two Witnesses.

WILLIAM F. MANNERS.

Witnesses i F. N. HILLIARD, W; P. CUTHERsoN.

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