US2501253A

US2501253A - Power unit

Info

Publication number: US2501253A
Application number: US48676A
Authority: US
Inventors: Alfred A Anglemyer
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-09-10
Filing date: 1948-09-10
Publication date: 1950-03-21
Anticipated expiration: 1967-03-21

Description

.March 21, 1950 A. A. ANGLEMYER POWER UNIT Filed Sept. 10, 1948 Patented Mar. 21, 1950 UNITED T S M PO NI 1 Alfred A. Anglelnyer, Dayton, Ohio Application September 10, g s s ria fivd 43, 76

6- Claims. (01.254-1-64) This'invention relates to a power unit and more particularly to a reversible hand operated unit of the Windlass type in which rotary. motion is imparted to a cable winding drum 'through'pawl and ratchet mechanisms, the latter. being operated by an'oscillatory lever.

- 3ll'a'nchored to a projecting ear 32 formed as an It isan'object of this invention to provide an improved, inexpensive, trouble-free power. unit.

Another object ofthis invention is to provide an inexpensive, light weight power unitwhich.

may be used for a multiplicity of purposes either around the home, the farm, or the shop.

-Another object of this invention isto. provide a power unit which may be used as a hoist or the like and in which a simple means is provided for, reversing the operation of the cablewinding drum. Another object of this invention is to-provide a manually operated power unit which is easy to operate without danger of injuring ones fingers. Other objects and advantages reside in the con: struction of parts, the combination thereof. and the mode of operation, a s-will become, more-ap: parent from the following description;

In the drawings: 1 v Figure l is an elevational view with parts broken away showing the power unit set. for lowering the load carried thereby;

Figure 2 is a view similar to Figure l showing the power unit as used for hoisting or pulling; Figure 3 is a plan view of the device shown in Figures 1 and 2; and

Figure 4 is a fragmentary plan view showing the arrangement of parts for reverse operation; 1

For convenience of descriptiononly, the. power unit shown herein will be described as a hoist, whereas it has many other uses and is capableof exerting a pull in any direction.

Referring now to the drawings wherein I have shown a preferred embodiment of my invention.

reference numerals l2 and it designate a pair of frame members which are spaced from one another intermediate the ends thereof and come together and contact one another at-each end, asbest shown in Figure 3.. The -frame members 1 l2 and It serve to support a drum [6 which is rointegral part of the frame element M. and has its other end hooked over the retainer pawl 24 so as to bias the retainer -pawl into engagement with the teeth ZU at all'timesl .The body of the spring 28 surrounds the axially extending hearing portion of the retainer pawl 24, asbest shown in Figure BV The lever pawl 22 is pivotally supported on a pin" or shaft '34 which in turn is supported between the arms of the Y-shapedoperating handle or lever-36. The arms offthe Y-shaped lever one end anchored to the drum I5, is adapted tobe wrapped around the drum as the operating lever is rotated counterclockwise, as viewed in Figure 2 of the drawings. As the cable 44 wraps around the drum, the free end of the cable serves to exert a pull on the load; For purposes of illustrating my invention,

have'showna hook 46 attached to the free end ofthe cable, whereas any'ty-pe of load engaging or anchor mechanism, such as a wire clamp or the tatably mounted on a stationary shaft l8sup'- like; may be attached to'the iree end of the cable. Acable guide clamp ti} is provided, as shown,

and is riveted or otherwise secured to theone end of the frame element s 'iz and M. For purposes of illustration; I have shown a rivet 5!} which serves the multiple purpose of'attachingth'e cable guide'clamp 48 tothemain frame and also serves to hold the endsiofth'e main frar'nein assembled relationship.'- Any suitable means, such as the- It very frequently happens that it is necessary. to allow. the cable to unwind from the drum'lfi;

such as when it is desired to lower a load by means of the hoisting mechanism. It also frequently happens that it is necessary for theoperator to use both hands while operatingthe hoist and for that reason it is desirable to provide some simple arrangement whereby the load may be lowered without the need for manually holding the retainer pawl out of engagement with the teeth 20.

In the device shown, I have provided a retainer pawl operating spring 54 which is attached to the upper face of the pawl 22, as shown, so as to be movable into engagement with the retainer pawl when the operating handle is moved into the position into which it is shown in Figure l of the drawings. The spring 54 is strong enough" to overcome the torsional effect of the retainer,

pawl biasing spring 28 and is arranged to hold the retainer pawl in the lifted position while the ratchet wheel 20 is moved in the reverse direc-,-

tion one notch at a time. In order to cause roat'point 62 for engaging a spring 54 which has 0 its one end rigidly fixed to the lever projection 23. When the lever 60 occupies theposition in which it is shown in Figure 2 of the drawing, it does not exert enough pressure on the spring 64 to hold the feed pawl outv of engagement with for rotatably mounting said drum on said support, a ratchet drivingly connected to said drum, flexible means having one end thereof secured to said drum, an operating handle pivotally mounted on said support, a feed pawl pivotally supported on said handle and arranged to engage said ratchet, first spring means for biasing said feed pawl into engagement with said ratchet, second springmeans arranged for overcoming the biasing effect of said first spring means so as to hold said feed pawl out of engagement with said ratchet, retainer pawl means, means for support ingsaid retainer pawl means in cooperative relationship with said ratchet, spring means for biasing said retainer pawl means into engagement with said ratchet, and resilient means operable during movement of said operating handle through a given range of movement for holding said retainer pawl means out of engagement with said ratchet.

2. In a power device; a support; a ratchet rotatably mounted on said support; an operating handle pivotally mounted on said support; a feed pawl pivotally supported on said handle and arranged to engage said ratchet; first spring means for biasing said feed pawl into engagement with said ratchet; retainer pawl; means for supporting said retainer pawl in cooperative relationshi with said ratchet, spring means for cient pressure on the free end of the spring 64 so that the feed pawl lever 22 will normally ride over the teeth 20 without engaging the same until the spring 54 contacts the retainer pawl 24, at which time the feed pawl 22 will be forced into engagement with the notch next to the notch. in which the retainer pawl 24 is engaged. Due

to the load on the cable and the shape of the ratchet teeth, the force of the spring 54 moving against the retainer pawl 24 will not cause the retainer pawl 24 to move out of engagement with the teeth of the ratchet until after the feed pawl 22 has rotated the ratchet 20 far enough to allow the retainer pawl to move out of engagement with the ratchet teeth. The arrangement of the spring 54 is such that-after the retainer pawl has been lifted from engagement with a tooth on the ratchet 20, the ratchet may be rotated in the clockwise direction, as viewed in Figure Liar enough so as to lower the load one notch before the spring 54 permits the retainer pawl to re-engage the ratchet 20.

The term cable as used herein is intended to include any flexible means capable of being wound around the drum l6 and is not intended to be used in its more limited sense.

Although the preferred embodiment of the device has been described, it will be understood that within the purview of this invention various changes may be made in the form, details, proportion and arrangement of parts, the combination thereof and mode of operation, which generally stated consist in a device capable of carrying out the objects set forth, as disclosed and defined in the appended claims.

Having thus described my invention, I claim:

1. In a power device, a support, a drum, means biasing said retainer pawl into engagement with said ratchet so as to prevent'reverse rotation of said ratchet; and means for operating the ratchet in reverse comprising, second spring means arranged for overcoming the biasing effect of said first spring means so as to move said feed pawl out of engagement with said ratchet until said feed pawl moves under said retainer pawl, and resilient means operable during movement of said handle through a given range for holding said retainer pawl out of engagement with said ratchet, said last named means comprising a spring carried by said feed pawl.

3. In a power device; a support; a ratchet rotatably mounted on said support; an operating handle pivotally mounted on said support; a feed pawl pivotally supported on said handle and arranged to engage said ratchet; first spring means for biasing said feed pawl into engagement with said ratchet; retainer pawl; means for supporting said retainer pawl in cooperative relationship with said ratchet; spring means for biasing said retainer pawl into engagement with said ratchet so as to revent reverse rotation of said ratchet; and means for operating the ratchet in reverse comprising, second spring means arranged for overcoming the biasing effect of said first spring means so as to move said feed pawl out of engagement with said ratchet until said feed pawl moves under said retainer pawl, and resilient means operable during movement of said handle through a given range for holding said retaine pawl out of engagement with said ratchet, said last named means comprising a spring carried by said feed pawl on its upper side for movement under said retainer pawl so as to lift said retainer pawl.

4. In a power device, a support, a cable winding drum, means for rotatably mounting said drum on said support, a ratchet drivingly connected to said drum, an operating handle pivotally mounted on said support, a feed pawl pivotally supported on said handle and arranged to engage said ratchet, first spring means for biasing said feed pawl into engagement with said ratchet, second spring means arranged for overcoming the biasing efiect of said first spring means so as to hold said pawl out of engagement with said ratchet, retainer pawl means, means for supporting said retainer pawl means in cooperative relationship with said ratchet, spring means for biasing said retainer pawl means into engagement with said ratchet, and resilient means operated in response to movement of said handle for holding said retainer pawl means out of engagement with said ratchet, said last named means comprising a spring carried on the upper surface of said feed pawl and arranged to engage beneath said retainer pawl means.

5. A Windlass comprising a frame, a cable carrying drum rotatably mounted on said frame, said drum being provided with peripheral ratchet teeth, an oscillating lever pivoted to said frame, a feed pawl carried by said lever for engagement with said ratchet teeth, a retainer pawl pivotally mounted on said frame for cooperating with said ratchet teeth, first spring means for biasing the retainer pawl into engagement with said ratchet teeth, second spring means for biasing said feed pawl into engagement with said ratchet teeth, third spring means carried by said feed pawl for engaging said retainer pawl as the feed pawl moves beneath said retainer pawl, fourth spring means including a spring member having one end secured to said feed pawl, and means carried by said lever for engaging said spring member so as to cause said spring member to bias said feed pawl out of engagement with said ratchet teeth.

6. A power unit comprising a frame, a memher mounted for movement relative to said frame, said member being provided with ratchet teeth, an oscillating lever pivoted to said frame, a feed pawl carried by said lever for engagement with said ratchet teeth, a retainer pawl pivotally mounted on said frame for cooperating with said ratchet teeth, first spring means for biasing the retainer pawl into engagement with said ratchet teeth, second spring means for biasing said feed pawl into engagement with said ratchet teeth, third spring means carried by said feed pawl for engaging said retainer pawl as the feed pawl moves beneath said retainer pawl, fourth spring means including a spring member having one end secured to said feed pawl, and means carried by said lever for engaging said spring member so as to cause said spring member to bias said feed pawl out of engagement with said ratchet teeth.

ALFRED A. ANGLEMYER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 606,760 Heisey July5, 1898 880,874 Freed Mar. 3, 1908 r 1,121,507 Kapferer Dec. 15, 1914 1,236,616 Snow Aug. 14, 1917 1,424,147 Barker Aug. 1, 1922 2,377,324 Coiling June 5, 1945