US993694A

US993694A - Vacuum cleaning apparatus.

Info

Publication number: US993694A
Application number: US58162510A
Authority: US
Inventors: Francis D Larson
Original assignee: Individual
Current assignee: Individual
Publication date: 1911-05-30
Anticipated expiration: 1928-05-30

Description

P. D. LARSON. VACUUM CLEANING APPARATUS. APPLIOATION nmzn um 12, 1am.

Patented May 30, 1911.

FRANCIS D. LARSON, 0F SALT LAKE CITY, UTAH.

VACUUM CLEANING APPARATUS.

Specification of Letters Patent.

Patented May 30, 191..

Application filed September 12, 1910. Serial No. 581,625.

obtaining a more thorough and efiicient action, and to this end it consists in an improved nozzle structure, together with a novel construction and arrangement of parts to be hereinafter described and claimed.

In order that the invention may be better understood, reference is had to the accompanying drawing forming a part of this specification, in which drawing,

Figure 1 is a front elevation of the nozzle; Fig. 2 is a bottom plan view thereof, and

Fig. 3 1s a cross-section on the line 33 of Fig. 1. Fig. 4 is a sectional detail ofthe inlet end of the nozzle showing the means for contracting the area thereof.

As'shown in the drawing, the nozzle comprises an elongated body 5 having an internal chamber 6 which opens through the top and bottom thereof. The chamber'is a relatively narrow slitformed in the nozzle body, and at the bottom thereof, the slit is widened so as to stop a short distance from the ends. The dust enters through this widened end of the slit and as said end occupies practically the full width of the nozzle body, a large surface is exposed to the suction when the apparatus is 1n operation, and, consequently, a large area can be quickly gone over and cleaned.

To the top of the nozzle body 5 is fastened a nipple 7 into which the chamber 6 opens, said nipple being provided for the attachment of a flexible hose or other conduit leading to the vacuum producing apparatus, which latter has not been shown as it forms no art of the present invention.

n the bottom of the nozzle body 5 on opposite sides of the inlet end of the chamber 6 are'rabbets in which are held, by means of strips 8, aprons 9 which depend for a short distance from the bottom of the nozzle body. These aprons extend throughoutthe entire length of the lower end of the chamber 6, and their bottom edges are serrated as clearly shown in Fig. 2, the purpose of which will be presently described. The aprons are formed of rubber or other flexible material.

In the bottom of the nozzle body 5 are parallel grooves 10 which extend throughout the entire width of said body and are closed at their ends by plates 11 secured to the ends of the nozzle body. In each of these grooves is located a rubber covered roller 12 which is journaled at its ends on pins 13 carried by the plates 11. These rollers are dimensioned so as to space the bottom of the nozzle body and the inlet end of the chamber a short distance from the floor or other part to be cleaned, and also to enable the a paratus to be more easily handled and carried directly over the parts to be cleaned.

In operation, the apparatus is rolled along the floor or other surface to be cleaned in the same manner as the ordinary vacuum cleaning apparatus. The suction produced in the chamber 6 causes the dust and dirt particles to enter the same and they are conducted to a suitable receptacle, which need not be here shown as it forms no part of the present invention. The flexible aprons 9 are dragged over the floor and they are designed to permit of their bending when coming in contact with large particles, thus permitting the latter to pass under the aprons, and upon being loosened thereby, they pass into the nozzle, the aprons returning to their natural position.

The strips 8 are interchangeable with broader ones, as shown in Fig. 4 to contract the width of the inlet end of the chamber any desired amount and thus accommodate the vacuum capacity of any machine.

The aprons 9 are notched deep enough to permit small openings to remain when the attachment is in place on the floor or surface to be cleaned; that is, the line of the bottom of the rollers should pass through a point which is at or about the central point of the depth of the notches. The position of the rollers with respect to the nozzle com pels' all air assing under the body 5 to do so from the ends. This suction being confined to a limited area. or the ends, is much more intense and is effective for a considerable distance beyond the apparatus, thus enabling the operat r to work eflectively in small corners and around the legs of benches, desks, etc. The notches in the aprons distribute the suction at the various points at which they occur, thus preventing a twoway suction from the ends of the nozzle, which would result in leaving a strip uncleaned in the middle of the path of the nozzle. The air entering through the notches destroys the tendency of the air, which enters at the ends, to whirl and leave the surface uncleaned in the center of the path along which the apparatus is traveling.

I claim:

1. In a vacuum cleaning apparatus, a suction nozzle having depending aprons extending along opposite sides of its inlet, and supporting rollers for the nozzle between which the aprons are located, said rollers extending parallel to the aprons and in close proximity thereto, and the aprons having a serrated bottom edge to form a plurality of inlets, said inlets extending above the line of the bottom of the rollers.

2. In a vacuum cleaning apparatus, a suction nozzle having an inlet the opposite sides of which are rabbeted, and strips removably mounted in said rabbets.

3. In a vacuum cleaning apparatus, a suction nozzle having an inlet the opposite sides of which are rabbeted, strips removably mounted in the rabbets, and flexible aprons rollers extending parallel to the aprons and I in close proximity thereto. v

5. In a vacuum cleaning apparatus, a suction nozzle having depending aprons extending along opposite sides of its inlet, and supporting means for the nozzle extending between the ends thereof outside the aprons, said supporting means filling the space between the body of the nozzle and the surface to be cleaned, and spacing the mouth of the nozzle from said surface, the aprons having openings to form a plurality of said air inlets to the nozzle.

In testimony whereof I aflix my signature in presence of two witnesses.

FRANCIS D. LARSON. Witnesses:

HARRY P. POLL, W. G. 0001:.