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Publication numberUS640998 A
Publication typeGrant
Publication dateJan 9, 1900
Filing dateApr 14, 1899
Priority dateApr 14, 1899
Publication numberUS 640998 A, US 640998A, US-A-640998, US640998 A, US640998A
InventorsArthur Pillsbury Dodge
Original AssigneeArthur Pillsbury Dodge
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 640998 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

No; 640,998. Patented Ian. 9, I900.


(Application filed Apr. 14, 1899.)

(No Model.) 2 Sheets-*Sheei 2.

YHE NORRIS 927555 00.4 mom'uria WASHINOTQN. o. c.


srnoirroa'rron forming part of Letters Patent No. 640,998, dated January e, 1906.

Application filed Apri114,1899.

To aZZ whom it may concern.-

Be it known that I, ARTHUR PILLSBURY DODGE, a citizen of the United States, residin g at New York city, State of New Yorlnhave invented certain new and useful Improvements in Turnstiles, of which the following is a specification.

This invention relates to an improvement in turnstile-entrances for buildings.

The object of the invention is to carry the person as soon as he steps into the turnstile automatically through the same, and as soon as he is landed within the building the turnstile is stopped automatically.

In the annexed drawings, forming part of this specification, Figure 1 represents'a sectional vertical elevation of an entrance and turnstile of a building constructed in accordance with my invention. Fig. 2 is a horizontal section of the same. Fig. 3 is an enlarged view of the lower part of the platform and its driving mechanism, said parts being in section.

The letter A indicates the entrance of the building, and B is the vertical turnstile, which consists of several radial equidistant vertical partitions or wings O, a central pivot or trunnion D, guidedin a bearing in the coiling of the entrance A, and a trunnion or pivot D, guided in a step-bearing E in a central cavity in the floor of the entrance way or passage.

On the bottom ends of the partitions C is constructed and attached a horizontal circular step floor or platform G of the same radius as the partitions or wings C. The top ends of said partitions are also combined and are covered by a horizontal circular top board G. The entrance-floor has a circular cavity H under the turnstile to permit the platform G to pass freely into the entrance-floor.

Under the platform G is arranged a horizontal bevel gear-wheel K, with a hub guided in the step-bearing E, and the hub of the wheel K has a vertical opening in whichis employed a strong spiral spring F, surrounding the trunnion D, guided in the step-bearing E. The spiral spring F rests on the bottom of the bearing E, and its top end presses against the bottom side of the platform G, and is of a strength sufficient to balance the weight of the turnstile. The upper side of Serial No. 713,040. (N0 model.)

the bevel-gear K has a circular rim N', and on the bottom side of the platform G is secured a ring 0 to engage with its bottom face the upper opposite face of the rim N by being pressed down upon it. The bevel gear wheel K is toothed on the bottom side of its rim and engages abevelpinion-gear P,mounted upon a horizontal counter-shaft Q, arranged under the bevel gear-wheel K, and the shaft Q is driven through power derived from the elevator or other power in the build= ing. The circular rim N may engage the rim 0 by one of them having teeth or projections and the other cavities, or both may be made to engage by friction. As soon as the person steps upon the platform G the spring F yields to the weight and pressure of the person, thus engaging therim O with the moving rim N and causing the automatic motion of the turnstile, carrying the person through the entrance. As soon as the person steps off the platform G the rims O and N disengage by the action of the spring F, and'thereby the turnstile is stopped. The rim N is shown more clearly in Fig. 3. In the ring 0 I may place a piece of rubber or other material, as at O, to get a better frictional contact with the rim N.

WVhat I claim, and desire to secure by Letters Patent, is-- 1. In combination, a turnstile comprising a platform, driving means for rotating the platform and transmitting means between the platform and driving means arranged to be put into and out of operative engagement by the weight of the person stepping on the platform, substantially as described.

2. In combination in a turnstile, a depressible platform, means for holding it normally up, and driving means below the platform arranged to be thrown into operative engagement therewith when the platform is depressed, substantially as described.

3. In combination in a turnstile, the wings, a platform or step-board at the lower end of the same connected thereto, a spring under the platform to hold the turnstile normally up, and a rotating drive-wheelbelow the platform arranged to be thrown into operative engagement with the platform when the same is. depressed, substantially as described.

4. In combination, a turnstile having vertical displacement under the Weight of a perfor rotating the same when under the Weight son and means for turning the turnstile, said of the person.

means being caused to act on the tnrnstile upon the depression of the same, substantially as described.

5. In combination, a turnstile having vertical displacement under the Weight of aperson, means for lifting the turnsti1e,and means In testimony whereof I affix my signature in presence of two Witnesses.



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2549451 *Jan 7, 1949Apr 17, 1951Hudson S Bay CompanyRevolving door driving means
US3019539 *Aug 5, 1960Feb 6, 1962Brecknell Dolman & Rogers LtdTurnstiles
US3440759 *Jul 24, 1967Apr 29, 1969Nat Commerc Bank Scotland LtdRevolving doors
Cooperative ClassificationE06B3/90