US875387A - Tackle-block. - Google Patents

Tackle-block. Download PDF

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Publication number
US875387A
US875387A US36715607A US1907367156A US875387A US 875387 A US875387 A US 875387A US 36715607 A US36715607 A US 36715607A US 1907367156 A US1907367156 A US 1907367156A US 875387 A US875387 A US 875387A
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United States
Prior art keywords
plates
pin
sheave
block
shell
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Expired - Lifetime
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US36715607A
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William H Stam
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William H Stam
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Priority to US36715607A priority Critical patent/US875387A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00Portable or mobile lifting or hauling appliances
    • B66D3/04Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B66D3/046Openable pulley blocks

Description

No. 875,387. .PATENTED 1130.31, 1901.

' w. H. STAM.

TACKLE BLOCK. APPLICATION FILED APR. 9,1907.

1/91 11 uses THE uomws PETERS 0a.. WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

WILLIAM H. STAM, OF VERDI, NEVADA.

TACKLE-BLOCK.

Patented Dec. 31, 1907.

To all whom it may concern:

Be it known that WILLIAM H. STAM, citizen of the United States, residing at Verdi, in the county of Washoe and State of Nevada, have invented certain new and useful Improvements in Tackle-Blocks, of which the following is a specification.

The object of the present invention is to provide an improved tackle block which embodies novel means for permitting an inter mediate portion of the cable to be entirely disengaged from the block by slipping it laterally from the pulley or sheave mounted therein.

One of the objects of the invention is to design a simple and efficient block of this character which can be readily operated by a single man without the necessity of releasing the tension in the cable and hauling in the slack, which operation is for many purposes extremely objectionable in as much as it occasions the loss of a considerable amount of time.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction and the means for effecting the result, reference is to be had to the following description and accompanying drawings, in which:

' Figure 1 is a side elevation showing the block in an open position. Fig. 2 is an edge view of the block, portions being broken away and shown in section.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The shell within which the pulley or sheave 1 is mounted comprises a pair of side plates 2 and 3, the lower portions of which have a hinged connection while the upper portions thereof are provided with the respective extensions 4 and 5 which form a means for looking the side plates together and also for attaching the shell to any suitable support. In bringing about the hinged connection between the two side plates it will be observed that a lateral extension 6 projects from the lower edge of the plate 3 and has the outer edge thereof hinged to the plate 2 as indicated at 7. The extension 4 is somewhat longer than the corresponding extension 5 and has the extremity thereof hooked at 8 to form a means for attaching the shell to a support. Offset portions 9 are formed in the extension 4 by means of which a portion 10 thereof is thrown inwardly so as to normally fit against the extension 5. A slide 11 operates upon the extension 4 and is designed to normally engage the opposite extension 5 and hold the two side plates of the shell in a closed position when the block is in use.

The sheave 1 is provided with the usual grooved periphery 12 and at its central portion with a bearing sleeve 13 which receives the shank of a headed journal pin 14, the latter member being rigid with the side plate 3. An opening 15 designed to receive the head of the journal pin 14 is formed in the side plate 2, while the opposite end of the journal pin extends through the opposite side plate 3 and is capped by a ring 16 which is rigidly secured both to the said pin and the case. sheave 1 is effectively held against displacement from the ournal pin by means of the head thereon and that when the hinged side plates of the shell are swung apart the cable can be readily disengaged from the sheave without liability of the latter member becoming displaced or lost.

In order to distribute the strain evenly between the two extensions 4 and 5, the portion 10 of the extension 4 is provided with a stud 20 and the extension 5 is formed with an opening 21 designed to receive the stud 20 when the two sections of the sheave are swung together as shown in Fig. 2. It will be readily apparent that with this construction all longitudinal slipping of the extensions 4 and 5 with respect to each other is effectively revented.

Having t us described the invention, what is claimed as new is:

1. In a device of the character described, the combination of a shell comprising a pair of side plates having corresponding edges thereof hinged, means for locking the plates in a closed position, a journal pin projecting from one of the plates, the opposite plate being provided with an opening normally receiving the extremity of the journal pin, and a sheave mounted upon the journal pin.

2. In a device of the character described, the combination of a shell comprising a pair of side plates having corresponding edges thereof hinged, extensions rojecting from the opposite edges of the si e plates, one of said extensions having a hooked extremity and being provided with offsets throwing a portion thereof against the opposite exten sion, a slide locking the two extensions to- It will thus be apparent that the gether, and a sheave mounted upon one of the side plates.

3. In a device of the character described, the combination of a shell comprising a pair of side plates having corresponding edges thereof hinged, means for locking the plates in a closed position, a headed journal pin projecting from one of the plates, the opposite plate being provided with an opening normally receiving the head of the journal pin, and a sheave mounted upon the journal pin and held against displacement by the head thereof.

4. In a device of the character described, the combination of a shell comprising a pair of hinged side plates, means for locking the side plates in a closed position, a headed pin carried by one of the side plates and extending through the same, a collar capping the extremity of the headed pin and rigidly connected to both the pin and side plate, and a sheave mounted upon the said headed in.

5. In a device of the character descri ed, the combination of a shell comprising a pair of side plates having corresponding edges thereof hinged, extensions projecting from the plates, a stud projecting from one of the extensions, the opposite extension being provided with an opening designed to receive the stud, means for locking the extensions together, and a sheave mounted upon one of the side plates' 6. In a device of the character described, the combination of a shell comprising a pair of hinged side plates, means for locking the said plates in a closed osition, a headed pin projecting from one o the plates and eX- tending therethrough, the opposite plate being formed with an o ening to receive the head of the pin, a co lar capping the extremity ofthe headed pin and rigidly connected to both the pin and the case, and a sheave ournaled upon the said pin.

In testimony whereof I a'flix my signature in presence of two witnesses.

WILLIAM H, STAM.

Witnesses:

RICHARD C. BERGWIN, HAROLD F. CoNDoN.

US36715607A 1907-04-09 1907-04-09 Tackle-block. Expired - Lifetime US875387A (en)

Priority Applications (1)

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US36715607A US875387A (en) 1907-04-09 1907-04-09 Tackle-block.

Applications Claiming Priority (1)

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US36715607A US875387A (en) 1907-04-09 1907-04-09 Tackle-block.

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US875387A true US875387A (en) 1907-12-31

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552087A (en) * 1984-01-24 1985-11-12 Oene Dale G Van Anchor lifting device
US5056760A (en) * 1990-04-02 1991-10-15 The United States Of America As Represented By The Secretary Of The Navy T-slot sheave
WO2008118105A1 (en) * 2007-03-23 2008-10-02 Tajfun Planina Proizvodnja Strojev, D.O.O. Pulley block

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552087A (en) * 1984-01-24 1985-11-12 Oene Dale G Van Anchor lifting device
US5056760A (en) * 1990-04-02 1991-10-15 The United States Of America As Represented By The Secretary Of The Navy T-slot sheave
WO2008118105A1 (en) * 2007-03-23 2008-10-02 Tajfun Planina Proizvodnja Strojev, D.O.O. Pulley block

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