US927668A - Pneumatic sweeper. - Google Patents

Description

A. E. MOORHEAD. PNEUMATIC SWEEPER.

APPLICATION FILED OUT. 28, 1908.

927,668, Patented July 13,1909.

livlyr WITNESSES: Y j [N VENTOR) @lz fl L29 MM 7/ m BY mammal 50 1;- W 2!) ATTORNEY.

Sweepers, of which'the following. is a speci- ALBERT E. MOORHEAD, or SAN FRANtIStO, caiaronxu.

PNEUMATIC SWEEPER.

Specification of Letters Patent.

Patented July 13, 1909.

Application filed October 28, 1908. Serial No. 459,948.

To all whom it may concern: I I

Be it known that I, ALBERT E. MooRnEAn, a citizen of theUnited States; residing at ban Francisco. in the. county of San Francisco and State of California, have invented new and useful Improvements in Pneumatic fication. I

The object of the present invention is to provide a pneumatic sweeper, which shall be simple in construction and convenient and effective in operation.

In the accompanying drawing, Figure 1 is a transverse vertical section of the sweeper on the line-1'1 of Fig. 2; Fig. 2 is a broken bottom plan view thereof; Fig. 3 is a detail transverse vertical section of a modified form of brush; Fig. 4: is a broken bottom plan view of said modified form.

Referring to the drawing, 1 indicates a rectangular casing, open at the bottom, closed at the top'and sides, and having removable ends 2. Upon the top of said casing, close to its four corners, are secured, by screws 3, rubber disks 4, the peripheries of which extend beyond the periphery of the casing, so that said disks serve as guards to protect furniture or the walls of the room against impact and abrasion by the sweeper casing when in usel 7 direction and obliqucly upward from the center of the'top of the casing is a tubular conduit 5, formed at its upper end with a socket 6 adapted, in the manner common in the art, to receive the lower end of a pipe, not shown, which also serves as a handle, and which is adapted to be connected at its upper end with a hose leading to a suction api iaral'us to maintain a constant upward suction into said conduit from the interior of the casing. Within the casing, close to the sides thereof, are arranged two rollers, 7-

having' rubber surlaccs 8, said rollers being pivoted in the ends ol the casing and the cnds of said rollers rotating in very close proximity to the inner surface of the end pieces 2. The lower edges 9 of the sides of the casing slope downwardly inward, and to said sloping edges strips ll) of felt are secured by means of metal strips 11, which extend over said feltstrips 10 and are socured to the said sloping lower edges by screws 12. l clt strips extend inward within the sides or the casing, and their free edges I lion ol a casing opcn at the bolttnn, a brush bear against .the rubber surfaces ol' the roll- Leading in a transverse ,ers, and thereby prevent the free pas age of air into the interior of the casino; aroind the outer sides of said rollers, so that the only air which can enter the casing is that pas ring thereinto between the rollers. extend only slightlybelow the lowcr edges of the ends Z of the casing. so'lhat. when said rollers are on the surface to be swept, sail lower cfdges are in close proximity to said surface, and therefore narrow streams of airentcr the casing between the surface which is being swept and the lower edges of said ends.

14 indicates the back ol a brush, having bristles 15, and attachczlby screws 16 to arms 17 depending from a metal top 19.

Said arms can move in vertical guideways or recesses 19 in the ends of the casing, thereby confining the brush agrainst movcmcnt in a direction transversely of its length. 'lo said toplS near its ends are secured-guide posts '20, upon the upper thrcad'cd .ends ol which are screwed stop nuts 21, said upper ends being adapted to slide through apertures. 22 formed in the tops of caps 33 screwed into cylindrical llangcs '24, formed on the. top of the casing. ithin said caps are contained springs 35, the lower ends of which bear upon the mctaltoplS, while their upper ends bear against the-under surfaces of the tops ol the t aps. Individualfclosed housings ll surround the caps, and are securcl by set screws 27 to the [lane-es '34. By means ol' these springs 25 the brush is pressed upon lhc surface to be'cleancd. This pressure can be increased by screwing the caps into the llangcs, while, by screwing them outward. the pros sure is diminished. With this constriu-rion, as thcaswccpcr is moved over the surface to be cleaned. the prcssure'ol the springs causes the brushes to remove the dust from said su'r lace, and the constant suction maintained by the suction apparatus draws the air and wilh it the dust from the ends ol the casing to the center and up through the conduit.

Figs. 3 and l illustraic a modilied l'orm ofbrush. in which the agitating material consists-ol obliquely arranged \crtical rectangular pieces 25 ol -lclt, said pieces being conlincd at the top between llangcs 2!), being also retained in place by a. square bolt 30 passing centrally through said pi'cccs.

l. in apncumatic sweeper, the combinasupported centrally in said casing, rollers parallel with said brush and on opposite sides thereof, the ends of said rollers moving in close proximity to the ends of the casing anrt'fleiible strips supported by the casing, and contacting with the outer sides of said rollers, to exclude the passage of air over the outer'side's of said rollers, substantially as described.

2; In a pneumatic sweeper, the combination of a'casing open at the bottom, abrush supported centrally in said casing, rollers para lel "with said brush and on opposite sidesthereof, the ends of said rollers moving in close proximity to the ends of the casing, means for Varying the pressure of said brush upon the floor, a substantially air tight housingfor said means, and flexible strips supported by the casing, and contacting with the outer sides of said rollers, to exclude the passage of air over the outer sides of said rollers, substantially as described.

3. In a pneumatic sweeper, the combination of a casing 0 en. at the bottom, abrush supported centraly in said casing, rollers parallel with said brush and on opposite sides thereof, the ends of said rollers moving in close proximity to the ends of the casing, means located at each end of the brush for varying the pressure of said brush upon the floor, and a substantially air tight housing for each of said means, substantially asdescribed.

In testimony whereof I have hereunto set my hand in the presence of two subscrlbing' witnesses.

ALBERT E. MOORHEAD.

W'itnesses: 4

FRANcrs M. WRIGHT, D. B. RICHARDS.

Images