US1716684A - Door-operating device - Google Patents

Description

June 11, 1929; CASHMAN DOOR OPERATING DEVICE 2 Sheets-Sheet Filed Jan. 24, 1928 Junell, 1929. A.A.'AsHMA- 1,716,684

DOOR OPERATING DEVICE Filed Jan. 24, 1928 2 Sheets-Sheet 2 Patented June 11, 1929.

usrrso stares ATHOL ALONZO' CASHMAN, OF GLENYVOODVILLE, ALBERTA, CANADA.

DOOR-OPERATING DEVICE.

Application filed January 2-1, 1928. Serial No. 249,165.

This invention relates to in'iprovemonts in door operating device and more particularly to devices of this description operated by compressed air and the objects of the invention are to provide a simply constructed, durable door operating device adapted for country grain elevators and which also can be used with great advantage on warehouse sliding doors. in country elevators, as is well known, it is necessary as a precautionary measure to close the doors while unloading grain; this means that they must be opened and closed once for each load of grain, necessitating a considerable distance being travelled by the operator for each time the doors are opened and closed, with consequent loss of time and unnecessary labor for the operator.

Most modern country elevators are equipped with air dumps which provide an air line passing by the operators desk, and in the present invention this air line has been utilized to co-ordinate and operate the applican'ts improved door operating mechanism, thus avoiding the necessity of having an extra compressor or tank.

lVith the foregoing and other objects hereinafter more fully referred to, the invention comprises a combination with compressed air means of door operating means associated therewith and operable thereby.

Referring now to the drawings in which.

like characters of reference indicate corresponding parts in each figure:

Fig. 1 is a side elevation of a sliding door fitted with my improved operating device.

Fig. 2 is a similar view to Fi 1, showing the sliding doors open.

Fig. 3 is an enlarged section on the line 33 of Fig. 1.

Fig. 4 is a perspective view of the piston rod guide.

Fig. 5 is a perspective view of the oil set on the pull rod.

From the foregoing it will be clear that my invention consists in the mechanism between the compressed air means intermediate of the operating means and the door to be operated thereby.

Referring now more particularly to the drawings in which a preferred example of my invention is disclosed 10 and 11 are door sections slidably mounted in any well-known manner on a supporting member 12, to form a closure for the door opening 13 of an elevator or warehouse. In Fig. 2 these door sections 10 and 11 are disclosed in open position, and in Fig. 1 are shown in closed position.

For operating these doors from a distance and withouthaving to handle them, in the present example I disclose operating means associated with an air line 14, comprising a compressed air cylinder 15 connected to the air line 14 and sliding through a side line in any well known manner not shown. A piston rod 16 of the cylinder 15 is secured at its outer end as at 17 to a cross slip 18. This member 18 also forms a guide for the piston rod, and

is riveted as at 19 to a draw bar 20. Pivotally mounted on each end of the draw bar 20 are links 21 and 22. These links in turn are pivotally connected at 23 and 2 1 to lever arms 25 and 26, in turn pivotally connected at 27 to door operating rods 28 and 29, in turn pivotally connected at their lower ends as at 30 to short lever arms 31 to the offset ends 32 of the rods 33 and 3 1, these rods being pivotally mounted at 35 and 36 in the shackles 3? and 38 on the doors lOand 11. Pivotally mounted braces 39 and 10 connect the rods 28 and 29 to the levers 25 and 26.

These rods 28 and 29 are also pivotally con nected to one another at the top by a double cross link 41, this link forming a guide for the guide rod 12 in the upward or downward travel of piston 16. The connection between the operating rods 28 and 29 to the pull rods 33 and 3 1 is by means of the lever arms 31 as disclosed in Fig. 5, the shackles 37 and 38 formed with two pieces of metal bolted together, one end of which is offset as at 43 thereby forming a free joint for the pull rods 33 and 341.

It will be seen from the foregoing that on the piston rod moving downwardly, the operating rods 28 and 29 will gradually assume a vertical position drawing the doors 10 and 11 inwardly to the closed position as inclivated in. Fig. 1, while on the inward stroke of the piston rod the rods 28 and 29 will be drawn upwardly automatically through the pull rods 30 and 31 moving the doors 10 and 11 along their trackway on the link 12 to an open position indicated in Fig. 2;

It will therefore be evident that the operator sitting at his desk has only to open and close the valves 44 and 15 to turn on the compressed air to open and close from a distance the door sections 10 and 11.

As many changes could be made in the above construction, and many apparently widely different embodiments of my invention, Within the scope of the claim, constructed Without departing from the spirit or scope thereof, it is intended that all matter con tained in the accompanying specification and drawings shall be interpreted as illustrative and not in a limiting sense.

hat I claim as my invention is A door operating device comprising in combination, a door, a pull rod, an operating rodpivotally connected to the pull rod, a cross bar, a lever arm pivotally connected to the operating rod and to the cross bar, a brace pivotally connected to the lever arm and to the operating rod, and means for causing the cross bar to move upwardly and downwardly whereby the operating rod is drawn upward ly to cause the pull rod to assume a horizontal position and automatically cause the door to move outwardly, and whereby the operating rod assumes a vertical position exerting pressure on the pull rod to move it downwardly and cause the door to move inwardly to closed position.

In Witness whereof I have hereunto set my hand.

ATHOL ALONZO CASHMAN.

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