US504318A

US504318A - Door or shutter opener

Info

Publication number: US504318A
Authority: US
Publication date: 1893-09-05
Anticipated expiration: 1910-09-05

Description

(No Modem J. BIRKEY. DOOR 0R SHUTTER OPENER. No. 504.318. Patented Sept. 5, 1893;

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' end of a rod j, the other end of said rod being carried by a plate 6', and secured to said plate UNITED STATES PATENT OFFICE.

JOHN BIRKEY, OF GROVELAND, ILLINOIS.

DOOR OR SHUTTER OPENER.

SPECIFICATION forming part of Letters Patent No. 504,318, dated September 5, 1893.

Application filed March 21, 1893.

To all whom it may concern:

Be it known that I, JOHN BIRKEY, of Groveland, in the county of Tazewell and State of Illinois, have invented certain new and useful Improvements in Door or Shutter Openers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to certain new and useful improvements in door and shutter operating devices and has for its object to provide such a device that can be conveniently and easily operated by the foot.

To this end my invention consists in the novel construction and arrangement of parts hereinafter fully described and afterward definitely pointed out in the claims, due reference being had to the accompanying drawings forming a part of this specification, wherein- Figure 1 is a front elevation showing the door or shutter closed, and Fig. 2 a side elevation showing the door open.

Referring to the drawings the letter a indicates a door or shutter. To the door a is secured a cleat b which is engaged by one end of a lever cwhich is rigidly secured in a drum cl. The drum d is journaled in suitable bearings is a slotted guide arm f about which is coiled a spiral spring f, one end of said spring abutting against one end of said guide arm and to the opposite end of the spring is secured one end of a cord 6 which is wound several times around the drum cl and thence passes over a guide pulley g secured to the plate 6 to the lever mechanism which will now be described. To the floor are secured uprights or standards h, h, and between the standards it is j ournaled a bell crank lever is provided at its free end with a pedal lo. To the other end of said bellcrank lever is pi votally secured a rod which at its opposite extremity is loosely connected to one end of a bell-crank lever 10 journaled in the standards h. To the other end of the bell crank lever 10 is loosely connected one bent to form a hook j adapted to engage any one of a series of perforations formed in a metallic strap 2'. The upper end of said strap Serial No. 467,025- (No model.)

is bifurcated or forked and bent over to form a claw adapted-to engage the knotted end of the cord 6.

The operation of the device is as follows: To open the door a the operator places his foot upon the pedal k" and depresses the end ofthe bell crank lever is. The bell crank lever k retracts the rod 70 which turns the bell crank lever k in its bearings which operates to draw down the strap 2' and with it the cord 6. When the cord is thus drawn down it turns the drum 01 upon its pivots and swings the lever 0 around upon its center and opens the door. When the foot is removed from the pedal la the spring f draws back the cord 6 and turns the drum d in a direction opposite to that above described and closes the door.

In order that the door may be held in an open position I provide a catch Z which is adapted to hold down the lever is and thus prevent the spring f from operating to close the door. Said catch Z is in the form of a hook and is pivoted to the floor so that it may be turned up to engage the lever lo and hold the same in its depressed position.

Having described my invention, what I claim is 1. In a door operating device, the combination with a drum carrying a lever engaging the door, of a cord wound around said drum, and having one of its ends secured to a spring and its other end connected to lever mechanism adapted to be operated by the foot to unwind the cord from the drum, substantially as described.

2. The combination with the drum d carrying the lever c engaging the door, of the cord e wound around said drum and secured at one end to a spring f and at its other end connected with a bell crank lever it a rod 70 secured at one end to said bell crank lever and at its other end to a bell crank lever is provided with a pedal 70 substantially as shown and described.

3. The combination with the drum d carry- 7 end to said bell crank lever and at its other end to a bell crank lever 70 provided with a pedal 7a,substantiallyas shown and described.

4. The combination with the drum dcarrying the lever cengaging the door, of the cord 6 wound around said drum and secured at one end to a springf and knotted at its other end and secured in the forked end of a strap 73, a series of perforations in said strap, a hooked rod j adapted to engage said perforations and secured to a bell crank lever 70 and mechanism adapted to be operated by the foot to actuate said bell-crank lever, substantially as shown and described and for the purpose specified.

5. The combination with the drum d carrying the lever c engaging the door, of the cord ing witnesses.

JOHN BIRKEY.

WVitnesses:

JOSEPH WAGLER,

WELLS COREY.