US1291743A - Pitman. - Google Patents

Description

B. J. BOUWMEESTER.

PITMAN.

APPLICATION FILED JUNE 1?. 191a.

Patented Jan. 21, 1919.

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Ti. WWI 1 ITNESSES :7 W

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nEnNAnn JOHN an sraansratrnnr OFFICE,

BOUWMEESTFR, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR T0 BISSELL CARPET SWEEPER CO.', 01 GRAND RAPIDS, MICHIGAN.

PI'IKEMAN.

To all whom it may concern:

Be it known that I, BERNARD JOHN Beowcitizen of the United States, residing at State of Michigan, have invented certain new and useful Improvements in Pitmen, of which the following is a specification.

This invention relates to improvements in pitmen.

My improved pitman is especially designed by me for use in carpet sweepers or vacuum cleaners such as shown in my Letters Patent No. 1,231,696, issued July 3, 1917, and I have illustrated the same as embodied in practice in astr'ucture of that type. My improvements are, however, advantageous for use in certain other relations.

The main objectof this invention is to provide animprov'ed 'pitnian which is selflubricating and self-alining, obviating the necessity for attention in use and accuracy in manufacturing and assemblin Further objects, and objects relating to structural details, will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing, forming a part of this specification, in which:

Figure I is a detail view of a pitman structure embodying the features of my invention.

Fig. II is a side view of the structure appearing in Fig. I.

Fig. III is a detail longitudinal section on a line corresponding to line 33 of Figs. II and IV.

Fig. IV is adetail longitudinal section on a line corresponding to line 4-4: of Figs. I and III.

Fig. V is a detail view of a slight. modification in the fori'n of connecting the pitman to its bearing.

Fig. VI is another modification in the feature of connecting the pitman to its bearing. In the drawing similar reference characters refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Specification of Letters Batent.

Grand'Itapids, "county of Kent,-

. a structure, it being Referring to the drawing, 1 represents the driving crank which, in practice, constitutes the axle for the driving wheels in the embodiment shown in Letters Patent referred to.

2 represents an arm the structure illustrated.

The pitman 3 is formed of a flat bar of steel having its outer end formed into an eye 4t disposed between and secured to the driven member 2 by the pin 5, the pin being headed or upset to retain it.

I provide a bearing comprising a pair of complemental members 6 having opposed recesses 7 to receive the crank and opposed recesses 8 to receive the end of the pitman.

The bearing members are secured to the pitman and in engagement with the crank by the bolt 9 arranged through the bearing members and pitman,

which permits a limited swing or pivotal movement, so that the hearing may aline itself on the crank to compensate or any such inaccuracies as are likely to occur in the manufacture of structures of this character.

In the modified construction shown in Fig. V the pitman 3 is formed of a strap folded upon itself with its ends lapped upon the 'outer sides of the bearing members, a bolt being arranged through both ends and through the bearing members securing the same effect as in Fig. III.

In the modification shown in Fig. VI the pitman 3 is formed as a loop 3 at its inner end embracing bearing members 6 which are cylindrical in general form. The loop embraces these bearing members loosely enough so that they aline themselves therein.

The bearing members are perferably formed of wood and treated with hot tallow or other lubricant material to provide a self-lubricating bearing. This is particularly desirable in vacuum cleaners of the type described, as the application of: lubricant is not desirable as it would collect dust and thus cause undue wear of the bearing, and, further, excessive lubricant might be applied which would drip upon carpets, rugs or the like on which the cleaner was used.

My improved pitman is also of advantage in that it facilitates the manufacture and assembly of the parts.

Patented Ja n.'21, 1919. j

Application filed June 17, 1918. Serial No. 240,358.

on the bellows of such the driven member in by means of which the parts are secured together in a manner 1. The combination "of "a drivingcrank; a

driven member having spaced arms, a pitman formed of a fiat bar havlng lts outer end rolled into an eye Which is disposed between and secured to said arms by a pin -41 Thegcombination of a driving crank, a pitman, and a pair of complemental bearing members embracing". the, crank and therethrough, and a pairofcomplemental 1 bearing members disposed on opposite sides of the innerend ofsaid pitman to embrace the crank and secured tothe pitman by a single bolt arranged through thebearing members and 'pitmanyand permitting" the self-alinement of the parts, the bear-' ing members being formed of WOOd treated to render them self-lubricating.

2. The combination ofa driving crank,

driven member having spaced arms, a. pitman formed of a Hat bar having"itsxouter eye which 1s d1sposed end rolled into .an between and secured-to said arms by a pin therethrough, and a pair of 'complem'ental bearing members: disposed on opposite sides s of the inner end of said pitman to-embrace the crank and secured to thepitman by single bolt arranged through the bearing members and .pitman and permitting the self-alinement of the parts. i 3. The combination of a driving'crank, a pitman formed of a flat bar, and a pair of complemental bearing members disposed on Copies of this'patent may be obtained for five cents each, by addressing the Commissioner of Patents.

opposite sides of the inner end of said pitman to embrace the crank and secured to the pitman, by" a single through thebearing members and pitman and permitting the self-alinement of the parts, the bearing members being formed of Wood treated to render them self-lubri eating:

secured to thepitman by asingle bolt. ar-

ranged through the bearing members and pitman and permitting the-self-alinement being-:6

of the-parts, the bearing members formed of Wood treated-to render them'. self lubricating;

5. The combination "of a driving: crank-Q a pitman, and a pair of complementai-bean ing members. embracing the crank and securedtosaid pitman so that the partsa-re self-aiming, the bearing .members being formed" of Wood" treated to render them' self lubricating.

In Witness 'WhereoflI have" hereuntoset my hand and sea 1- -in"the presence'of two- Witnesses. s v

BERNARD JOHN BOUWMEESTER. as ,l

Witnesses-z IRA J. O EN, FRED C. LINDNER x Washnngton, D. 6."

bolt arranged

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