US922532A - Mechanical movement. - Google Patents

Description

0. H. SLAFTER.

MECHANICAL MOVEMENT. APPLICATION FILED NOV.18. 1907.

922,532, Patented May 25, 1909.

rue NORRIS PETERs co., WASHINGTON, n. c

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Urban H lyl'er I Vw Guam IIEITED %TATE% ORREN H. SLAFTER, OF LOS ANGELES, CALIFORNIA.

MECHANICAL MOVEMENT.

Application filed November 18, 1907.

To alt whom it may concern:

Be it known that I, ORREN H. SLAFTER, a citizen of the United States of America, and a resident of Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Mechanical Movements, of which the following is a specification.

.his invention relates to mechanical movements especially designed for safely and firmly holding elevator cars and similar vehicles subject to the force of gravity.

The object of the invention is to provide a simple, effective and durable mechanical movement of this class in which dislocation of the parts and wear thereof is reduced to a minimum.

IVith these and other objects in view the invention consists of certain novel features of construction, combination and arrangement of parts as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a front elevation of a portion of an elevator car equipped with this improvement showing the parts in unlocked position; Fig. 2 is a top plan View thereof; Fig. 3 is a view similar to that shown in Fig. 1 with the parts in locked position; and Fig. 4: is a vertical section taken on line 4& of Fig. 1 showing the wedge member in front elevation.

In the embodiment illustrated, a portion of an elevator car frame A is shown, at tached to two main levers B by a shaft or pin M, preferably extending therethrough at a point midway of the length thereof and which are attached by means of a shaft I to the lower ends of upright laterally spaced hanger pieces Or bars F and at the other end by means of a pin 0 to the lower end of a pair of uprights G whereby the entire weight of the car and its appurtenances is supported by the shaft M, the levers B, the hanger pieces F and the link C. A coiled spring K is preferably arranged on a rod K which extends through the frame A and through one arm of an L-shaped bracket K secured to the bars F, the spring being normally compressed on said rod between said arm and a nut secured to the upper end thereof and tends to start the downward movement of the parts on the breakage of the cable. The upper ends of the pairs of Specification of Letters Patent.

Patented May 25, 1909.

Serial No. 402,774.

levers or bars F and G are connected by vertically spaced cross bars D and E mounted at one end between bars F and at the other end between bars G and are pivotally connected at both ends thereto. The ends of said bars D and E project beyond the members G and are pivotally connected at their ends at Q, and It, respectively to a clutch block I arranged within a canaliculated guide L. A wedge-like member H is arranged to operate between the inner inclined or cam face G of the members G and the guide L for a purpose to be described. This wedge member H is constructed, as shown in Fig. 4., in the form of the letter H with the cross bar H arranged between the bars D and E and with the upright members it and 7t arranged on opposite sides of the bars D and E.

The link 0 is pivotally connected at one end between the upright or hanger bars F intermediately of their ends and at its other end is pivotally connected between the lower ends of the members Gr preferably by means of a pivot O which extends through said members G and through a slot 0 arranged longitudinally of said link C. A suspending or operating cable N is connected at one end to the upper end of the hanger bars F and normally supports the weight of the elevator or other car and its appurtenances.

Immediately the cable breaks or becomes disconnected the hanger pieces F move downwardly and the levers B tilt to about five degrees more or less, which causes the shaft or stud O to ride upward in the slot O and thereby causes the inner ends of the bars D and E to move upward a distance equal to the downward movement of the hanger bars F whereby said levers D and E are inclined in a manner corresponding to the levers B and the wedge member H is forced up by the bar D between the tapered or inclined faces of the members G and the gibs of the canaliculated guide L and thus causes the clutch block I to bear on the inner sides of said gibs producing a clutch action which is assisted by the weight of the car connected therewith and securely locks the car against further downward movement. The gripping power so obtained is so great that it is impossible for the wedge H. and clutch block I to slip or move on the gibs of the guide L.

From the foregoing description, taken in conn ection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention as defined in the appended claims.

I claim as my invention 1. In a mechanical movement the combination of a lever adapted to be pivoted intermediately of its ends, a hanger bar pivoted at one end to one end of said lever, a cam faced member pivotally connected to the other end of said lever, a clutch lever pivoted at one end to said hanger member and at its other end to said cam faced member and projecting therebeyond, a clutch head mounted on the end of said clutch lever, a guide member, and a wedge-like member arranged between the cam faced member and said guide and means for operating said members to lock said wedge-shaped member and said clutch head on opposite sides of said guide member. I

2. In a mechanical movement the combination of a lever adapted to be pivoted intermediately of its ends, a hanger bar pivoted at one end to one end of said lever, a cam faced member pivotally connected to the other end of said lever, a clutch lever pivoted at one end to said hanger member and at its other end to said cam faced member and projecting therebeyond, a clutch head mounted on the end of said clutch lever, and a wedge-like member arranged between the cam faced member and said clutch head, a guide member arranged between said wedge member and said clutch head, and spring means for operating said members to cause said wedge-shaped member and said clutch head to bind against said guide memher.

3. The combination with an object to be v supported of a lever pivoted intermediately of its ends thereto, a hanger bar pivotally connected at one end to one end of said lever, suspension means connected to the other end of said bar, a cam faced member pivotally connected at one end with the free end of said lever, a bar pivoted at one end to said hanger bar and having a longitudinally extending slot in its other end for pivotal connection with said cam faced member, clutch levers pivotally connecting said cam faced member with said hanger bar and projecting at one end beyond said cam faced member, a canaliculated guide, a clutch head pivotally connected with said projecting ends and arranged within said canaliculated guide, and

a wedge member arranged between the cam faced member and the gibs of said guide.

In witness whereof I have hereunto set my hand.

()RQREN H. SLAFTER.

lVitnesses M. L. TRIMBLE, D. H. J onus.

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