US1957184A

US1957184A - Window jack

Info

Publication number: US1957184A
Application number: US568438A
Authority: US
Inventors: London L Smith
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-10-12
Filing date: 1931-10-12
Publication date: 1934-05-01
Anticipated expiration: 1951-05-01

Description

May 11, 1934.

L. L. SMITH 57,184

WINDOW JACK Original Filed Oct. 12, 1951 INVENTOR HIS ATTORNEYS Patented lviay l, 1934 QFFE CE Application October 12, 1931, Serial No. 568,438 Renewed October 16, 1933 2 Claims.

This invention relates to certain novel improvements in window jacks, and has for its principal object the provision of an improved construction of this character which will be highly efiicient in use and economical in manufacture.

It is an object of this invention to provide a new and improved window bracket or jack upon which a person may be supported while performing various operations such as, for example, cleaning the window, or painting the frame work.

Another object of the invention is to provide a new and improved window jack that will provide a maximum of safety for the workman supported thereby.

An additional object of the invention is to provide a new and improved window jack and unique and effective means to retain the jack on a window sill against vertical and lateral displacement.

Another object of the invention is to construct the jack in such a manner that a portion thereof may be readily and quickly removed and the remaining structure be easily carried to the top of a building, there to be used to suspend a block and pulley from the cornice of the building.

Other objects will appear hereinafter.

The invention consists in the novel combination and arrangement of parts to be hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawing, showing the preferred form of construction and in which:

Fig. 1 is a perspective view of the invention;

Fig. 2 is a side elevational view showing the invention applied to a sill; and

Fig. 3 is a sectional View on line 33 in Fig. 1.

In the drawing, which illustrates a preferred and practical embodiment of the invention, my improved jack is indicated generally at 10 and includes a bar 12 and a frame removably mounted on the bar 12 and including

bars

11 and 13, each of the bars having at one end a hook portion 14 that grasps one side of the sill 15 to prevent displacement of the jack in a vertical plane. My invention likewise includes new and improved neans for preventing lateral displacement of the jack 10, with respect to the wall 16, this displac ment being known as side sway and the inability to prevent the same constituting a defect in the prior art devices.

To prevent side sway or lateral displacement of the jack l0 1 provide a relatively long abutment 17 which abuts the outside of the wall 16 when the jack is in position. The abutment member 1'7 is attached to a bar 18 which is provided with a series of holes 19 to receive selectively a bolt 20 that provides adjustable connection between the bar 18 and the arms 21 of bifurcated middle bar 12, the arms of which are also provided with a series of holes to receive the bolt 20.

The lower end of the bar 18 is attached, as by a bolt 22, between the bifurcations 23 of a supporting arm 24 that is provided with a series of holes 25 for the reception of a bolt 26 to provide adjustable connection between the arms 21 and the arm 24 whereby it will readily appear that the abutment member 17 may be adjusted, with respect to wall 16, at three points of the triangle formed by the bar 18, arm 24, and the center bar 12.

To insure prevention of side sway of the abutment member 17 and of the jack I provide a brace 2'? which has one end adjustably attached, as at 31, to bar 11 and the other end attached to arm 24; and a similar brace 28 which has one end adjustably attached, as at 32, to bar 13 and the other end attached to arm 24, in a manner to be explained hereinafter.

In the use of the jack a plank or platform 29 may be laid across the jack to support the workman and an upright safety guard or wall 30 may be built around the jack if desired.

When the jack is in use the weight of the same and the workman supported thereby will be directed down through arm 13 to the abutment member 17 which will be urged into abutting engagement with the wall 16.

The broad face (Fig. 3) of this member 17 will efiectively pr vent side sway or lateral displacement of the jack thereby insuring the workmans safety, it being noted that the prior art devices have had a tendency to permit side sway of the jack and thereby endanger the safety of the workman. The

braces

27 and 28 effectively prevent sidewise movement of member 17 relative to the frame 10.

My invention is adapted to be used to suspend a block and pulley from the cornice of a building. The wall section 16 shown in Fig. 2 would illustrate a typical cornice if the window sill 15 and associated window structure were removed therefrom. To accomplish this end I pivotally connect the portion 33 of the

bars

11 and 13, as at 35, to a bracket 34 that is adapted to rest on bar 12, with a projection 36 from each portion 33 dependin at each side of the bar 12. To this end also a pair of jaws 37 is provided on the lower end of each of the

braces

27 and 28 for the reception of the arm 24 whereby to remove the

bars

11 and 13 from the middle bar 12 so that the

bars

11 and 13 may be folded (dotted lines, Fig. 3) upon each other, the jaws 37 slipped off (Fig. 3) arm 24, and the

bars

11 and 13, bracket 34, and braces 2'7 and 28 then lifted off bar 12. The middle bar 12, bar 18 and abutment 17 may then be carried singly or with a like device to the top of a building and the hooked portion 14 of bar 12 hooked over a cornice in the same manner that the portions 14 are hooked over the window sill 15 in Fig. 2, with the abutment 17 facing against the cornice in the same manner that the abutment 1'7 engages the wall 16 in Fig. 2, on the side thereof opposite that engaged by the hooked portion, whereupon a block and pulley may be suitably attached to bar 12, and a workmans platform pulled by ropes thus suspended from the cornice. It will be noticed that when the

bars

11 and 13 and

braces

27 and 28 are removed from

bars

12 and 18, arm 25 and abutment 17 these parts provide a device that is light and which may be easily carried by a workman to the top of a building for attachment to a cornice in the manner described.

While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification, without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention what I claim as new and desire to protect by Letters Patent is:

1. A device of the character described comprising a bar including a hook portion adapted to grip a wall on one side thereof adjacent a window to prevent vertical displacement of the device, a member adapted to abut the wall on the side thereof opposite that gripped by the hook portion and below the latter to prevent side sway or lateral displacement of the device, means to adjustably support the abutment member from said bar and below the same, a frame removably mounted on said bar and including bars adapted to parallel the first-named bar and each including a hook portion adapted to cooperate with the first-named hook portion to grip said wall, and brace members for said means and abutment member carried by said frame to prevent side sway of the abutment member whereby the frame may be removed from the first-named bar and the bracing members from said means and the firstnamed bar and abutment member be mounted on a cornice for the purposes set forth.

2. A device of the character described, comprising a bar including a wall-gripping hook portion, a wall abutment member, means to support the abutment member from said bar, a frame removably mounted on said bar, said frame including bars adapted to parallel the first-named bar on opposite sides thereof and each including a wall-gripping hook portion, and brace members for said means and abutment member, said brace members having removable attachment to said frame and to said means.

LONDON L. SMITH.