US143677A

US143677A - Improvement in fire-escapes

Info

Publication number: US143677A
Authority: US
Publication date: 1873-10-14
Anticipated expiration: 1890-10-14

Description

3Sheets--Sheet 3. C UETERGH. Fire-Escapes. N0.I43,677; Patented 0ct.14,1873.

G y o l? x C l a o VJ 1f ML f Murga: Cam ggz'etgrg.

` z; im @mamy A f` wage? Nrrnn CARL DIETERIGH, 'on BOSTON, MASSACHUSETTS.

Specification forming p art of Letters Patent No. 143,677, dated October 14, 1873; application filed August 13, 1873.

. pairs of lazy-tongs, B '15', arranged as shown,

the two pairs at each end being connected at the joints byv a "series of horizontal rodsfa. There are in the feet of each pair of lazy-tongs two screw-nuts, C G, which are pivoted within the tongs, so as to swivel or turn therein. These nuts engage with a pair of right and left threaded screws, D D', formed upon a long horizontal shaft, E, duly supported in bear! ings or standards b b, erected on a base-platform, F. There are two of such shafts E, there being a gear, G, xed on the outer end of each. Between the said gears are two pinions, H I, which engage together and with gears G G. One of such pinions is provided with a crank, K, for revolving it. On turning the said crank in one direction, the shafts E E will be simultaneously revolved, and all the lazy-tongs will be contracted horizontally, so as to be extended vertically a manner to raise the platform A. A counter-movement of the crank will insure depression of the said platform.

In order to steady the series of lazy-tongs, or give support to them, I apply to them and the base-platform four extensible standards, O O O O. Each of such standards is composed of a series of separate parts or sections, d, ar-

ranged to slide into each other like the tubes of a telescope. Each part, except the lower one, is slotted, as shown at d', and receives in the Slot one of the connection-rods a of the lazy-tongs, which goes through the slot, an-d is provided with a head, e.

Each of these sections may be connected with that immediately next it by tongues and grooves applied to them, in order to render the column or extensible standards more rigid l when elevated. rlhe lowermost section is iixed at its foot to the base-platform.

l A series of four braces, U U U U, is applied to the base-platform, or pivoted to the stationary sections of the extensible standards O O O O, so as to be capable of being turned up into vertical positions, or down into inclined ones, so vas to rest at their outer ends upon the ground. A rope, l, hooked to each strut and extended from a windlass, m, arrangedv as shown, serves to hold the strut firmly upon or in contact with the ground. These struts are to brace the re-escape when extended or in use.

In the said fire-escape, I claim as my invention as follows, viz:

l. The combination of the four braces U an d their sustaining-ropes Z with the platforms A F, lazy-tongs B B' and their operative nuts C C', and Screws D D', arranged and applied together substantially as specified.

2. The combination of the four extensible standards O O O O, substantially as described, with the two platforms A F, the lazy-tongs B B' and their operative nuts C C', and screws D D' arranged and applied together substan tially as specified.

CARL DIETERIGI-I.

Witnesses l It. H, EDDY, J. It. SNOW.