Vacuum cleaning machine

April 12, 1932.

1,853,960

W. T. CUNNINGHAM

VACUUM CLEANING MACHINE Filed Sept. 28, 1929

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ATTORNEYl .Patented Apr. 12, 1932 1,853,960

UNITED STATES PATENT OFFICE

WILLIAM T. anomw, 03 S®. CSAIS, SOCBIGAH

Wmt αΚΕΑΞΠ&amp;Θ 3ΧΑΟΗΙ0Ε

Applicative .filed’September 88, 1889.

My invention relates to a new and useful improvement in a vacuum cleaning machine and particularly of the coin controlled type. It is an object of the present invention to profl vide a vacuum cleaning machine which may be operated by coin control and utilized for . cleaning the upholstery of vehicles and the like so that the device may be installed in service stations and utilized as a self-serving hi device. '

It is another object of the invention to provide a vacuum cleaning mechanism whereby a high suction may be afforded to those desiring to use the same.

Another object of the invention is the provision of a device of this class which will be simple in structure, economical of manufacture and highly efficient in use.

Other objects will appear hereinafter.

•'c The invention consists in the combination and arrangement of parts hereinafter described and claimed.'

The invention will be best understood by a reference to the accompanying drawings ·.·.·. which form a part of this specification and in which,

Fig. 1 is'a side eleyational view of the invention, with parts broken away and parts shown in section.

Fig. 2 is a view taken on line 2—2 of Fig. 1 with parts broken away and parts shown in section.

Fig. 3 is a fragmentary sectional view taken on substantially line 3--3 of Fig. 2.

’ The device comprises a housing 7 having a lower compartment 8 with the walls 9 and 10 perforated. Positioned in the compartment 8 is a dust bag 11 connecting with the conduit 12 which communicates with the blower housing 13 positioned in the upper compartment 14 of the housing.

In the blower housing 13 is a fan 15 driven by the electric motor’ 16, and communicating through the nipple- 17 with the blower ·’> housing 13 is an inlet conduit 18. The shaft 19 of the motor is provided with a worm. 20 meshing with a worm wheel 21 journaled on suitable brackets 22 mounted in the compartment 14. The shaft 45 on which the ^E0 wheel 21 is mounted carries a worm 43 meshi&rial W 396,789.

ing with a worm wheel 44 supported by brackets 22b One of the wires of the circuit leading to the motor 16 is connected to the contact 23 and continued by the wire 24 which is connected to tile contact 25. §5 Rockably mounted on the contact 25 is the switch arm 26 which is connected by the rod 27 to the dog 28 which is rockably mounted on the coin tube 29 and projected inwardly so that when a coin is so dropped down the tube 29 it will rock the dog 28 to move the switch arm 26 into engagement with the contact 23 and close the circuit to. the motor 16. The motor 16 will then be set into operation and cause a rota- 35 tion of the wheel 44, the switch remaining closed until the contact member 30 mounted on the face of the. wheel 44 is brought into engagement' with the projection §1 on the arm 26, upon which the arm 26 will be 70 rocked into the position shown in Fig. 2 to open the switch.

The ratio of the gearing between the worm 20 and the wheel 44 will,-of course, determine the length of time the device will be operated upon the deposit of a coin in the .device. A coin receptacle' 32 is positioned in the compartment 14 below the coin tube 29.

With a device constructed in this mannei, the advantages sought are obtained and it is 30 believed that the simplicity of the structure is evident from the description.

While I have illustrated and described the preferred form of my invention, I do not wish to limit myself to the precise details 35 of structure shown but desire to avail myself of such variations and modifications as may come within the scope of the appended. claim.