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Publication numberUS1241660 A
Publication typeGrant
Publication dateOct 2, 1917
Filing dateNov 13, 1916
Priority dateNov 13, 1916
Publication numberUS 1241660 A, US 1241660A, US-A-1241660, US1241660 A, US1241660A
InventorsMarshal G Roberts
Original AssigneeMarshal G Roberts
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1241660 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)


venmnoa. APPLICATION FILED NOV. I3. |916- Patented Oct. 2, 1917.



Specification of Letters Patent.

Patented Oct. 2, 1917.

Application tiled November 13, 1916. Serial No. 130,954.

To all yw/wm it may concern Be it known that I, MARSHAL G. ROBERTS, a citizen of the United States, residing at Detroit, county of WVayne, State of Michigan, have invented a certain new and useful Improvement in ventilators, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled inthe art to which it pertains to make and use the same, reference being had to the accompanyin drawings, whichform a part of this speci cation.

This invention relates to what might be termed a burglar-proof ventilator. The idea is to employ a screen protected by a strong and rigid frame and attachable to the window frame and the bottomsash of the lower window in such a way that the window cannot be separated from the screen or the screen from the frame except through unusual and unlikely efforts. The screen with its frame is constructed in such a Way that it cannot be successfully pierced in any ordinary house-breaking operation.

The screen is also so designed that it is a protecting screen of general application, making possible the proper ventilation of rooms or the house with little or no likelihood of anyone getting in and little chance of the rain or snow beating in.

This will more fully appear in the description following, in which- Figure 1 represents an inside elevation of the screen and frame.

Fig. 2 is a fragmentary vertical section showing how the attachment is made to the lower bar of the lower sash.

Fig. 3 is a section on the line B-B of Fig. 1.

Fig. 4 is a detail of a modified form of lever to operate the slides used to adjust the fra-me to windows of different width.

Fig. 5 is a detail of one of the rod ends.

a is a sheet metal plate provided with two Vertical rows of struck-out portions b forming louvers. Back of these louvers is a screen c having a thin metal margm d which can be soldered in place. The plate or frame a is turned over at the top and bottom to form guides e, while a pair of end slldes f have turned-over top and bottom edges which fit into the guides formed by the channels e, e of the plate a. These slides serve to adjust the ventilator to window frames of varying widths. Attached to the top and bottom of each slide is a heavy metal strip g having its inside end bowed out and perforated so that the rods h may be hooked thereinto at different positions, depending upon the width of the window that the ventilator is to be used on. The ends of these strips g terminate in spurs i projecting from the sides of the slides so as to be jammed into the substance of the window frame to hold the ventilator from being lifted or slid out..

Now the rods h connect in connecting pairs at top and bottom, the members of a pair being on opposite sides of the fulcrum point of the slnall levers j. The terminal of this lever is provided with ratchet teeth engaged by spring pawls c. It is apparent that by swinging either one of these levers counterclockwise the slides will be driven out and the spurs 'L' will be driven into the window frame. The idea of these devices is to make quick application of the ventilator to the window in case, for instance, one desires to put the ventilator in at a certain time every day or every few days. The rods L having been `placed in the hole in the strap g most advantageous for the particular width of window upon which the ventilator is customarily used, all that it is necessary to do is to hook the upwardly projecting lug Z of the ventilator into the bracket m on the lower sash of the window, then lower the sash until the ventilator strikes the bottom of the window frame, then throw the levers as far as can be done, thereby embedding the spurs in the window frame, and bringing the slides out to occupy the complete opening between the sash and the window frame. The catch n may then be swung over behind the upwardly projecting lug Z. This will eii'ectually prevent the separation of the bracket and the lug Z as the lug is provided with the turnedover lip at its top which will prevent the same passing through the bracket when the catch n has been thrown What I claim is:

1. A ventilator, comprising a sheet of metal provided with slides at opposite sides of the sheet metal, guides at the top and bottom of the sheet metal for the slides, a pair of levers, one fulcrumed at the top and one at the bottom of the sheet metal, rods in pairs connecting the slides at the top and bottom thereof, one rod of a pair engaging the lever at one side of the fulcrum and the other rod of a pair engaging the lever at the other side of the fulerum, and means for locking the levers at dierent positions of their throws, and means for locking the sheet of metal to the window sash. i

2. A ventilator, comprising 'a sheet of metal provided with Ventilating openings therein, slides at opposite sides of the sheet metal and guided therein, a pair of levers, one ulcrumed at the top and one at the bottom of the sheet of metal, spurs on the outside edges of the slides, rods connecting the slides in pairs at the top land bottom, one rod of a pair engaging the lever at one side of the fulcrum and the other rod of a pair engaging the lever at the otherside of the fulorum, means for loc-king the levers in various positions of their thrust and means for locking the sheet of metal to the WindoW sash.

In testimony whereof I sign this specication.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2436344 *Apr 17, 1944Feb 17, 1948Winogrond Milton JPortable ventilator having adjustable mounting means
US2440468 *Feb 8, 1945Apr 27, 1948Gerken John CWindow ventilator
US2448671 *Mar 10, 1947Sep 7, 1948Hord Paul EFrame structure for ventilating fans
US2487294 *Nov 7, 1947Nov 8, 1949Belter George JAir moving device
US2580663 *Dec 16, 1949Jan 1, 1952Delf George AVariable-width window fan assembly
US2584706 *Dec 22, 1948Feb 5, 1952Hulsey Jr Jesse WAdjustable window guard
US2756469 *Jul 22, 1954Jul 31, 1956Gardner Wood Products Co IncBarrier for a doorway or the like
US5782039 *Jul 17, 1996Jul 21, 1998Brk Brands, Inc.Portable gate
USD384752Jul 17, 1996Oct 7, 1997Brk Brands, Inc.Safety gate
U.S. Classification49/55, 160/375, 160/104, 160/224
Cooperative ClassificationE06B2009/002