US1798520A - Window wiper - Google Patents

Description

March 31, 1931. w BRUGH 1,798,520

WINDOW WI PER Filed Aug. 8, 1928 2 Sheets-Sheet 1 INVENTOR WITNESS: ATTORNEY March 31, 1931.

G. w. BRUGH 1,798,520

WINDOW WIPER Filed Aug. 8, 1928 2 Sheets-Sheet 2 \na rllllllllllll u i,

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l ENTOR ATTORNEY memd'mu. 31, 1931 UNITED STATES PATENT; OFFICE enema w. seven, or seven nm nvmnu'a Application filed Auwt 8,19%. derial 2%(898310.

This invention relates to a window wiper which is mainl designed for wiping widows of street cars, busses and other vehicles provided with air pressure, the general object of J, the invention being to provide a cylinder containing two pistons which are connected together and the reciprocatory movement of which operates a wiper, with valve means operated by the reciprocatory movement of the 10 pistons for controlling the flow of compressed air to the ends of the cylinder whereby the pistons are reciprocated by the compressed air. I

This invention also consists in certain other Eli features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim. In describing the invention in detail, reiterence will be had" to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure l is a view showing the device in use.

Figure 2 is a vertical sectional view t rough Fi ure 1.

igure 3 igure l is a longitudinal sectional view ough the cylinder.

'gure 5 is a section on line 5-5 of Figis a section on line 3-3 oi Figtired is a fragmentary elevation, showth e means for connecting the piston rod he valve operating member. igure 7 is a sectional view through the valve means, showing the parts in one position.

Figure 8 is a similar view, showing the parts in another position.

Figure 9 is a view of the dish connected with the valve shaft for operating the valve.

Fi ure 10 is a view of the member operated y the movement of the disk.

Figure 11 is a view of the valve member.

In these views, the numeral 1 indicates a cylinder which is provided with a bracket 2 which is adapted to besupported on a part of the window or other transparent member which is to be wiped. A pair of pistons 3 is arranged in the cylinder and these pistons are connected together by the rod 4, to the center of which a stub shaft 5 is connected, this shaft passing through an elongated slot 6 filorrne in the c linder so that the shaft can move back and orth through the slot during the reciprocatory movement of the pistons.

A shaft 7 is journaled in the body 8 which is formed with the lower art of the cylinder at the center thereof, and this shaft has attached thereto a slotted arm 8, the slot of which receives the outer end of the shaft 5, so that the sliaft 7 will be rocked by the reciprocatory movement of the pistons. This shaft passes through a part of the window, as shown in Figure 2, and the arm 9, which carries the'wiper'element 10 is attached to the outer end of this shaft. is formed in the body 8 and a bushing 12 has one end threaded into the body, with its major portion being positioned in the chamber. The shaft passes through the bushing and has a non-circular and projecting therefrom. A disk 13 is fastened to this non-circular end of the shaft so that the disk will move with the shaft and said disk is notched on its periphery to form the shoulders 14.

A. valve -lorniin disk 15 is rotatably mounted on the bus ing and is pressed by a spring 16 against one wall of the chamber 11 in which is formed the two ports 17, each of which is connected with a port 18 in each end of the cylinder by a passage 19 formed in the cylinder wall. Compressed air is supplied tothe chamber 11 from any suitable source through means of the tube 20, and said chamber is also provided with an exhaust port 21 which is in communication with an arc-shaped groove 22 formed in one face of the valve member 15. This valve member is of two diameters, as shown, to provide the shoulders 23 and the ports 21 and 17 are so positioned that in one position of the valve member, one port 17 will be uncovered while the other port 17 is covered by the shouldered portion of the valve member so that this covered port 17 will be in communication with the exhaust, port 21 through A valve chamber 11 pain of oppositely arranged projections 24:,

one of which operates between-two stop pins 25 in the valve chamber, which limits themovement of the valve 'member, and the other projection 24 is adapted to be engaged by the pair of angle arms 26 formed on a substantially heart-shaped member 27 which is rotatably mounted on the bushing 12 between the disk 13 and a collar 28 on the bushing. This member 27 carries a pin 29 which is engaged by the shoulders 14 on the disk 13, whereby the member 27 is rocked by the movement of the shaft 7 through said disk and in turn, this member 27 will rock the valve member 15 through means of its arms 26 engaging the projection 24 on the valve member. The pointed part of said member 27 engages a spring pressed ball 30 arranged in a recess 31 formed in a wall of the chamber 11, this ball acting to complete the movement of the member 27 and the valve 'member 15 with a quick action after said member 27 has been initially moved by the disk 17 engaging the pin 29, for as soon as the point moves beyond the center of the ball, the pressure of the ball on the inclined edge of the member 27 wilff act to throw the member 27 over with a quick action until it is sto flpoid by the second projection 24on the dis engagin one of the stop pins 25. In or or to provide access to the parts, threaded plu s 32 are used to close the ends of the cylin er and openings in the valve ghamber 11 and its recess 3 From-the foregoing it will be seen that the flow of'compressed air into the ends of the cylinders is controlled by the valve member 15 which is operated from the shaft 7- through meansof the disk v13 and the member 27, and this shaft in turn is operated by the reciprocatory movement of the pistons andthe wiper arm is actuated by said'shaft.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that chan es may be made in the construction and in t e comm the scope-of the appended claim.

What I claim is I and pistons in the cylinder and connected to a wiper, 'a'bushing carried by the cylinder I and extending into the chamber, a shaft journaled in t 0 cylinder and bushing, means connecting the shaft to the pistons, a notched operating disk fixedto the shaft in the chamlugs to limit the oscil at1on of the valve late, an intermediate plate journaled on the ushing adjacent the operating disk, a lug on sald intermediate plate to engage the notch of the operating disk, angular lugs on the intermediate plate to engage the other lug of the'valve plate, converg ng faces on said intermediate plate forming a pointed portion thereto, and a spring pressed ball in sald chamber 'to engage the pointed portion and the inclined faces of the intermediate plate to throw the intermediate plate over with a quick action.

In testimony whereof I aflix'm signature.-

- GEORGE W. RUGH.

A window wiper including a cylinder hav- I.

ing a compressed air valve chamber with passages in communication with the cylinder

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