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Publication numberUS476375 A
Publication typeGrant
Publication dateJun 7, 1892
Filing dateSep 30, 1891
Publication numberUS 476375 A, US 476375A, US-A-476375, US476375 A, US476375A
InventorsEmil Fischer
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Sliding gate
US 476375 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

(No Model.) 2 Sheets-Sheet 1.


No. 476,375. Patented June-v, 1892..

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SPECIFICATION forming part of Letters Patent No. 476,375, dated June 7, 1892. Application filed heptember 30, 1891. Serial No. 407,309. (No model.)

To aZZ whom it may concern.-

Be it known that I, EMIL FISCHER, a citizen of the United States, residing at Hallsville, in the county of De Witt and State of Illinois, have invented certain new and useful Improvements in Sliding Gates; 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.

This invention relates to sliding and rolling gates, and has for its object to provide a simple and efficient mechanism for automatically opening and closing the gate after an initial momentum has been imparted thereto by a sudden pull on the operating-lever.

The improvement consists of the novel features and the peculiar construction and combination of the parts which will be hereinafter more fully described and claimed, and which are shown in the annexed drawings, in which a Figure 1 is a perspective view of a gate embodying my invention. Fig. 2 is an elevation showing the operation of the same by dotted lines. Fig. 3 is a cross-section showing the sheave-wheel in full lines. Fig. 4 isa detail view of the actuating-weight.

The posts A and B, located a proper distance apart and on one side of the roadway, support the gate 0 and the sheave D. The post E, located on the opposite side of the road, forms a stop for the gate to close against.

The gate 0 is of usual construction, its top rail F being extended and located between pairs of pulleys G on the said posts A and B, the lower pulleys being grooved to receive the lower edge of the rail, which is constructed to operate therein. The diagonal brace f, extending from the lower rail of the gate to the end of the extended rail F, strengthens the latter and prevents sag therein. The sheavewheel D is mounted on the cross-bar a, which is connected at its end to the posts A and B, respectively, and is grooved to receive the cable or wire 11, which is connected at its ends to the ends of the said rail F and which passes once or twice around the said sheavewheel D between its ends. The sheave-wheel is relatively proportioned to the size of the gate-that is, the circumference of the sheavewheel is somewhat greater than the width of the gate-opening-so that on opening orclosing the gate the said wheel will not make a complete revolution. This construction is essential because the finishing movement of the said sheave-wheel is effected by an actuatingweight, which weight is limited in its movement by gravity when at its lowest position.

The actuating-weight I is semi-elliptical and is concentrically mounted with the said sheave-wheel, being preferably supported on the same pivot which connects the said sheave wheel with the cross-bar a. The keeper J straddles the shank of the weight I and causes the weight and sheave to turn together. The proportion of the shank to the keeper is such that the weight has a limited movement independently of the said sheavewheel, thereby permitting the said weight to acquire a momentum after passing the deadcenter before reacting on the gate through the said sheave-wheel and cable.

The operating-lever K for controlling the movements of the gate is pivotally supported on a post L, which is located on one side of the plane of the gate and is connected to the actuating-weight I by a cable or rod Z. This lever is composed of two parts M and N. The part N is a short lever, which is pivotally su pported on the post L about midway of its ends and is provided with a loop 72 and standards It, the loop and standards being located on opposite sides of the pivotal support of the said lever. The part M, which is the operating-lever proper, is pivoted to the standards a, and has its short end projected through the loop 'n and provided with weight M, the latter serving, with the rod Z, to counterbalance the lever K and relieve the sheave-wheel D of the weight of the said lever. The loop N permits alimited movement of the lever M independently of the lever N, thereby facilitating the operation of the actuating-weight.

It will be observed that the actuatingweight I normallyoccupiesa pendent position whether the gate be opened or closed.

To open or close the gate, a smart pull on the outer end of the lever M is all that is necessary. This operation brings the weight I to the highest position, and the momentum acquired thereby being suliicient to carry the weight past its dead-center the weight by the force of gravity will descend and effect the complete opening and closing of the gate in the aforesaid manner, as will be readily understood.

In either of the two positions of the weight I the latter will exert a pressure on the lowermost portion of the keeper J, and a space will be left between the uppermost portion of the said keeper and the upper edge of the shank of the weight 1. Obviously on operating lever K the Weight I will receive an initial movement before performing efficient service in carrying the weight of the gate. Again, the lost motion between the loop wand the part M of the lever K permits the said part M to acquire an initial movement before transmitting motion to the weight I.

n and between the wheel D and the weight I at J permits the operating-lever K to obtain a movement prior to carrying the load. \Vhen the weight I reaches its dead-point, the

acquired momentum of the gate will carry it past the same, and the said weight gravitating will carry the gate to the end ofits travel. 1

will help to carry the said weight I past its dead-point. Either or both of these causes will serve to carry the weight past its deadpoint, thereby materially assisting in the manipulation of the gate.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. The combination, with a sliding gateand supports therefor, of a sheave-wheel having a circumference somewhat greater than the width of the gateopening, a cable connected at its ends to the ends of the gate, respectively, and passing around the said sheavewheel between its ends, and a weight attached to the same suflicient to move the gate to the end of its travel after an initial momentum The lost motion between the parts M and N at.

has been imparted thereto, substantially in the manner set forth.

2. The combination, with a sliding gate and supports therefor, of a sheave-wheel having a circumference somewhat greater than the width of the gate-opening, a cable passing around the said sheave-wheel and having connections at its ends with the ends of the gate, and an actuating-weight attached to the same sufficient to move the gate and havinga limited independent movement, substantially as set forth, for the purpose specified.

3. The combination, with a gate and a weighted sheave-wheel having a circumference somewhat greater than the width of the gate-opening and heavy enough to operate the gate automatically after an initial momentum has been imparted thereto, of a short lever, as N, pivotally supported between'its ends and having the loop 7?. and the standards 97., and the lever M, pivoted to standard 01., and having its short end projected through the loop at and weighted, substantially as described, for the purpose specified.

4. The combination of the sliding gate, supports therefor, a sheave-wheel having a circumference somewhat greater than the width of the gate-opening, a cable passing around the said sheave-wheel and connected at its ends with the ends of the gate, a weight concentrically mounted with the said sheavewheel and constructed to actuate the samehgff' and having alimited independent movement, the short lever N, pivotally supported between its ends, the connection I between the said weight, lever N, the loop n, and the standard 17., secured to the lever N, and the lever M, pivoted to the standard at and having its short end projected through the said loop and weighted, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

EMIL FISCHER. Witnesses:


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4858383 *Jul 11, 1988Aug 22, 1989Kendig Albert RSecurity enclosure and gate system
Cooperative ClassificationE05Y2900/531