US2208901A - Chimney cleaning device - Google Patents

Description

July23, 1940. s J. HAwKlNsoN CHIMNEY CLEANING DEVICE Filed March 2l. 1939 xNvENToR ATTORNEYS Patented July 23, 1940 l 2,208,9'Olf il u I, units resiliently urged apart to have brushing action on opposed chimney walls in which novel means are incorporated for adjusting the brush units to a chimney of predetermined size and in which the brush units may be latched in closely compacted relation to facilitate lowering of the device to the bottom of the chimney preparatory to expanding the brush elements and drawing the device upwardly of the chimney.

In the accompanying drawing: Figure l is a side elevational view of a device `in accordance with my invention; and

Figure 2 is a similarlview taken from a position at right angles to Figure 1.

In the embodiment selected to illustrate my invention, I make `use of brush units I0 and I2.

Each brush unit comprises a back I4 and rows of steel bristles I6. Each unit is also preferably made up of sections I8, see Figure 2, which secf tions are arranged in edge-to-edge relation and recessed at 20 for the reception of a metal strap 22 having holes for the reception of screws 24 threaded into the sections I8 for connecting the same into a unitary structure. The width of the brush units when viewed according to Figure 2 is such as to readily pass into chimneys of standard construction. This is also `true of the configuration illustrated in Figure l, which ViewA illustrates the units `II) and I2 latched in closely nested relation for passage into the chimney. Unit III is provided with a spacing screw 26, while both units I0 and I2 are provided with spacing screws 28 arranged to have abutting relation when the units are positioned according to Figure 1. I Thus the screws 26 and 28 hold the units I0 and I2 in the parallel relation of Figure 1.

Unit I2 is provided with a loop 30 into which one end of a latch bolt 32 projects, which latch` bolt is slidably related to a housing 34 associated with the unit Ill. Loop 38 is welded to a hinge section 36, while housing 34 is welded to a hinge section 38. |Ihus the units I0 and I2 will be effectively latched in the position of Figure 1 when the latch bolt 32 projects into the loop 30. The latch bolt includes a head 48 against which one end of a compression spring 42 bears, with the opposite end of the spring abuting the end 44 of the housing 34 for urging the head 46 into the loop 30. Latch bolt 32 may be withdrawn from gagement with the pin 68.

Means for urging the units I8 and I2 apart or `to the direction of the dotted line positions of of the-screw 6I).

twenty per cent .to Mervil Hamlin,V Milan,

the loop 38 through the medium of a pull-'chain 46.

Hinge section 36 is pivotally connected with a hinge section 48 through the medium of a bolt 5I) having its ends upset at 52 to restrain the bolt from relative longitudinal movement. Hinge section 38 is pivotally connected with a hinge section 54 through the medium of a bolt 55, which is also upset at its ends in the same manner as the bolt 50. Hinge sections 36 and 48 and 38 and 54 respectively comprise two ordinary strap hinges. Bolts 50 and 56 are spaced sufficiently far to provide free accommodation for the pull chain 46. I connect the bolts in fixed, spaced relation through the medium of welded connections 58. Sections 36 and 38 have their lower ends provided with openings for loosely receiving screws 60 threaded into the units I8 and I2. To the free ends of the sections 48 and 54 I connect a bolt 62 for the reception of a ring 64 to which an operating rope or cable 66 is connected.

A pin 68 is also connected with the hinge sections 48 and 54, which pin` passes through a ring 'I0 in the pull chain 46 to limit the movement of the pullchain. In other words, the brush assembly may be lowered to position with the units I0 and I2 latched in the compact relation of Figure l, after which the pull chain is given a yank for withdrawing the lock bolt 32. A sudden yank on the pull chain easily withdraws the lock bolt and such withdrawal is easily determined by the sense of touch as the ring I0 is pulled upwardly into en- Figure 1` comprises a relatively stiff compression spring 12 which has one end welded to the hinge 4 section 36 and its opposite end welded to the hinge section 38. A smaller compression spring 14 is also in pressure relation with the two hinge sections, and each section is provided with an opening for loosely receiving a bolt 16 upon which the spring 'I4 is mounted.` The bolt is provided with a nut 18 which may be adjusted to vary the effective length of the bolt, so that the nut I8 and the bolt head 80 constitute stop means for limiting the spread of the hinge sections 36 and 38 when thelatch bolt 32 is withdrawn.

Two screws 28 are arranged on opposite edges of the hinge section 36 so as to restrain the unit I2 from relative pivotal movement about the axisy The two screws 28 associated with the unit I4 are also associated with the hinge section 38 in the same manner.

Spring 'I2 in combination with the smaller spring 14 is of such tension as to effectively press the Wire bristles I6 against opposite faces of the chimney for cleaning purposes. The bristles are of suflicient length and are spaced in such manner as to embody an effective brushing action. The spread of the hinge sections 36 and 38 may be predetermined through adjustment of the nut 18 for adjusting the units fIl! and I2 to theV requirements of a predetermined chimney', "Limiting the spread ofthe units ID and I2 is an important feature, particularly when cleaning chimneys having communicating flues and the like. sence of limiting means, the brush unitssfare urged into the ue openings and frequently lodge therein so as to render dislodgementlidiixicult and Lila;

some cases impossible.

Without further elaboration, the foregoing Will so f ully illustrate my inventiongthat others, may,

by applying current knowledge readily adapt the same for use under Various conditions ofs'ervicef I claim:

y of the pullmember.

A chimney cleaning brush comprising two brush units, two strap hinges, each strap hinge having a first part thereof pivotally connected with one `brush unit, the second part of each strap hinge being xedly connected with the same part of the other strap hinge, a loop xed to the rst part of one strap hinge, a spring urged bolt slidably mounted on the rst part of the other strap hinge, withthe' bolt 'arranged `toi" bef extended'ijinto said loop for-holding th brush units in" clcseli'f nested vand inoperative positions, spring means acting "fn'said rst parts to pivot the latter and the brush units away from each other when said spring pressed bolt is Withdrawn from said loop,

ya pull element 'connected with said springurged bolt,and stop means fixed to the second parts of said strap hinges'and operatively connected with said pull.` member to limit the relative movement SVERRE J. HAWKINsoN.

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